[Qemu-devel] [PULL v5 00/57] pc, pci, virtio: new features, cleanups, fixes

[Qemu-devel] [PULL v5 00/57] pc, pci, virtio: new features, cleanups, fixes

[Michael S. Tsirkin]

The following changes since commit 5d3217340adcb6c4f0e4af5d2b865331eb2ff63d:

  disas: Fix ATTRIBUTE_UNUSED define clash with ALSA headers (2016-07-19 16:40:39 +0100)

are available in the git repository at:

  git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_upstream

for you to fetch changes up to bc38ee10fc26338e21c01485540f815be1f3db28:

  intel_iommu: avoid unnamed fields (2016-07-21 20:44:20 +0300)

----------------------------------------------------------------
pc, pci, virtio: new features, cleanups, fixes

- interrupt remapping for intel iommus
- a bunch of virtio cleanups
- fixes all over the place

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

----------------------------------------------------------------
Dr. David Alan Gilbert (14):
      virtio-net: Remove old migration version support
      virtio-serial: Remove old migration version support
      virtio: Migration helper function and macro
      virtio-scsi: Wrap in vmstate
      virtio-blk: Wrap in vmstate
      virtio-rng: Wrap in vmstate
      virtio-balloon: Wrap in vmstate
      virtio-net: Wrap in vmstate
      virtio-serial: Wrap in vmstate
      9pfs: Wrap in vmstate
      virtio-input: Wrap in vmstate
      virtio-gpu: Use migrate_add_blocker for virgl migration blocking
      virtio-gpu: Wrap in vmstate
      virtio: Update migration docs

Fam Zheng (6):
      virtio: Add typedef for handle_output
      virtio: Introduce virtio_add_queue_aio
      virtio-blk: Call virtio_add_queue_aio
      virtio-scsi: Call virtio_add_queue_aio
      Revert "mirror: Workaround for unexpected iohandler events during completion"
      virtio-scsi: Replace HandleOutput typedef

Jan Kiszka (1):
      intel_iommu: Add support for Extended Interrupt Mode

Marcel Apfelbaum (7):
      tests/prom-env-test: increase the test timeout
      hw/alpha: fix PCI bus initialization
      hw/mips: fix PCI bus initialization
      hw/apb: fix PCI bus initialization
      hw/grackle: fix PCI bus initialization
      hw/prep: realize the PCI root bus as part of the prep init
      hw/versatile: realize the PCI root bus as part of the versatile init

Michael S. Tsirkin (2):
      intel_iommu: get rid of {0} initializers
      intel_iommu: avoid unnamed fields

Peter Xu (25):
      x86-iommu: introduce parent class
      intel_iommu: rename VTD_PCI_DEVFN_MAX to x86-iommu
      x86-iommu: provide x86_iommu_get_default
      x86-iommu: introduce "intremap" property
      acpi: enable INTR for DMAR report structure
      intel_iommu: allow queued invalidation for IR
      intel_iommu: set IR bit for ECAP register
      acpi: add DMAR scope definition for root IOAPIC
      intel_iommu: define interrupt remap table addr register
      intel_iommu: handle interrupt remap enable
      intel_iommu: define several structs for IOMMU IR
      intel_iommu: add IR translation faults defines
      intel_iommu: Add support for PCI MSI remap
      q35: ioapic: add support for emulated IOAPIC IR
      ioapic: introduce ioapic_entry_parse() helper
      intel_iommu: add support for split irqchip
      x86-iommu: introduce IEC notifiers
      ioapic: register IOMMU IEC notifier for ioapic
      intel_iommu: add SID validation for IR
      kvm-irqchip: simplify kvm_irqchip_add_msi_route
      kvm-irqchip: i386: add hook for add/remove virq
      kvm-irqchip: x86: add msi route notify fn
      kvm-irqchip: do explicit commit when update irq
      kvm-all: add trace events for kvm irqchip ops
      intel_iommu: disallow kernel-irqchip=on with IR

Radim Krčmář (1):
      intel_iommu: support all masks in interrupt entry cache invalidation

Stefan Hajnoczi (1):
      nvdimm: fix memory leak in error code path

 Makefile.objs                     |   1 +
 hw/i386/intel_iommu_internal.h    |  50 ++++-
 include/hw/acpi/acpi-defs.h       |  13 ++
 include/hw/i386/apic-msidef.h     |   1 +
 include/hw/i386/intel_iommu.h     | 170 ++++++++++++++-
 include/hw/i386/ioapic_internal.h |   3 +
 include/hw/i386/pc.h              |   4 +
 include/hw/i386/x86-iommu.h       | 100 +++++++++
 include/hw/pci-host/q35.h         |   8 +
 include/hw/pci/pci.h              |   2 +
 include/hw/virtio/virtio-gpu.h    |   2 +
 include/hw/virtio/virtio-scsi.h   |   6 +-
 include/hw/virtio/virtio.h        |  28 ++-
 include/sysemu/kvm.h              |  21 +-
 block/mirror.c                    |   9 -
 hw/9pfs/virtio-9p-device.c        |  14 +-
 hw/alpha/typhoon.c                |   2 +-
 hw/block/virtio-blk.c             |  18 +-
 hw/char/virtio-serial-bus.c       |  62 ++----
 hw/display/virtio-gpu.c           |  36 ++--
 hw/i386/acpi-build.c              |  43 +++-
 hw/i386/intel_iommu.c             | 437 +++++++++++++++++++++++++++++++++++++-
 hw/i386/kvm/pci-assign.c          |  10 +-
 hw/i386/pc.c                      |   3 +
 hw/i386/x86-iommu.c               | 128 +++++++++++
 hw/input/virtio-input.c           |  26 +--
 hw/intc/ioapic.c                  | 135 ++++++++----
 hw/mem/nvdimm.c                   |   1 +
 hw/mips/gt64xxx_pci.c             |   2 +-
 hw/misc/ivshmem.c                 |   4 +-
 hw/net/virtio-net.c               | 102 ++++-----
 hw/pci-host/apb.c                 |  15 +-
 hw/pci-host/grackle.c             |   2 +-
 hw/pci-host/prep.c                |   1 +
 hw/pci-host/versatile.c           |   1 +
 hw/pci/pci.c                      |  15 ++
 hw/scsi/virtio-scsi.c             |  35 ++-
 hw/vfio/pci.c                     |  12 +-
 hw/virtio/virtio-balloon.c        |  19 +-
 hw/virtio/virtio-pci.c            |  10 +-
 hw/virtio/virtio-rng.c            |  20 +-
 hw/virtio/virtio.c                |  51 ++++-
 kvm-all.c                         |  19 +-
 kvm-stub.c                        |   6 +-
 target-arm/kvm.c                  |  11 +
 target-i386/kvm.c                 | 109 +++++++++-
 target-mips/kvm.c                 |  11 +
 target-ppc/kvm.c                  |  11 +
 target-s390x/kvm.c                |  11 +
 tests/prom-env-test.c             |   2 +-
 docs/virtio-migration.txt         |   6 +-
 hw/i386/Makefile.objs             |   2 +-
 hw/i386/trace-events              |   3 +
 target-i386/trace-events          |   7 +
 trace-events                      |   3 +
 55 files changed, 1476 insertions(+), 347 deletions(-)
 create mode 100644 include/hw/i386/x86-iommu.h
 create mode 100644 hw/i386/x86-iommu.c
 create mode 100644 target-i386/trace-events

[Qemu-devel] [PULL v5 01/57] nvdimm: fix memory leak in error code path

[Michael S. Tsirkin]

From: Stefan Hajnoczi <stefanha@redhat.com>

object_get_canonical_path_component() returns a heap-allocated string
that must be freed using g_free().

Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/mem/nvdimm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c
index 81896c0..7895805 100644
--- a/hw/mem/nvdimm.c
+++ b/hw/mem/nvdimm.c
@@ -98,6 +98,7 @@ static void nvdimm_realize(PCDIMMDevice *dimm, Error **errp)
                    "small to contain nvdimm label (0x%" PRIx64 ") and "
                    "aligned PMEM (0x%" PRIx64 ")",
                    path, memory_region_size(mr), nvdimm->label_size, align);
+        g_free(path);
         return;
     }
 
-- 
MST

[Qemu-devel] [PULL v5 02/57] tests/prom-env-test: increase the test timeout

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

On a slower machine the test can take more than 30 seconds.
Increase the timeout to 100 seconds.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 tests/prom-env-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/prom-env-test.c b/tests/prom-env-test.c
index 6df57d2..7a62857 100644
--- a/tests/prom-env-test.c
+++ b/tests/prom-env-test.c
@@ -30,7 +30,7 @@ static void check_guest_memory(void)
     int i;
 
     /* Poll until code has run and modified memory. Wait at most 30 seconds */
-    for (i = 0; i < 3000; ++i) {
+    for (i = 0; i < 10000; ++i) {
         signature = readl(ADDRESS);
         if (signature == MAGIC) {
             break;
-- 
MST

[Qemu-devel] [PULL v5 03/57] hw/alpha: fix PCI bus initialization

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

Delay the host-bridge 'realization' until the
PCI root bus is attached.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/alpha/typhoon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/alpha/typhoon.c b/hw/alpha/typhoon.c
index 97721b5..883db13 100644
--- a/hw/alpha/typhoon.c
+++ b/hw/alpha/typhoon.c
@@ -824,7 +824,6 @@ PCIBus *typhoon_init(ram_addr_t ram_size, ISABus **isa_bus,
     int i;
 
     dev = qdev_create(NULL, TYPE_TYPHOON_PCI_HOST_BRIDGE);
-    qdev_init_nofail(dev);
 
     s = TYPHOON_PCI_HOST_BRIDGE(dev);
     phb = PCI_HOST_BRIDGE(dev);
@@ -889,6 +888,7 @@ PCIBus *typhoon_init(ram_addr_t ram_size, ISABus **isa_bus,
                          &s->pchip.reg_mem, &s->pchip.reg_io,
                          0, 64, TYPE_PCI_BUS);
     phb->bus = b;
+    qdev_init_nofail(dev);
 
     /* Host memory as seen from the PCI side, via the IOMMU.  */
     memory_region_init_iommu(&s->pchip.iommu, OBJECT(s), &typhoon_iommu_ops,
-- 
MST

[Qemu-devel] [PULL v5 04/57] hw/mips: fix PCI bus initialization

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

Delay the host-bridge 'realization' until the
PCI root bus is attached.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Leon Alrae <leon.alrae@imgtec.com>
Tested-by: Leon Alrae <leon.alrae@imgtec.com>
---
 hw/mips/gt64xxx_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 3f4523d..4811843 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -1167,7 +1167,6 @@ PCIBus *gt64120_register(qemu_irq *pic)
     DeviceState *dev;
 
     dev = qdev_create(NULL, TYPE_GT64120_PCI_HOST_BRIDGE);
-    qdev_init_nofail(dev);
     d = GT64120_PCI_HOST_BRIDGE(dev);
     phb = PCI_HOST_BRIDGE(dev);
     memory_region_init(&d->pci0_mem, OBJECT(dev), "pci0-mem", UINT32_MAX);
@@ -1178,6 +1177,7 @@ PCIBus *gt64120_register(qemu_irq *pic)
                                 &d->pci0_mem,
                                 get_system_io(),
                                 PCI_DEVFN(18, 0), 4, TYPE_PCI_BUS);
+    qdev_init_nofail(dev);
     memory_region_init_io(&d->ISD_mem, OBJECT(dev), &isd_mem_ops, d, "isd-mem", 0x1000);
 
     pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "gt64120_pci");
-- 
MST

[Qemu-devel] [PULL v5 05/57] hw/apb: fix PCI bus initialization

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

Create and connect the PCI root bus to the
host bridge before the later is 'realized'.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/apb.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/hw/pci-host/apb.c b/hw/pci-host/apb.c
index babbbef..16587f8 100644
--- a/hw/pci-host/apb.c
+++ b/hw/pci-host/apb.c
@@ -670,6 +670,13 @@ PCIBus *pci_apb_init(hwaddr special_base,
 
     /* Ultrasparc PBM main bus */
     dev = qdev_create(NULL, TYPE_APB);
+    d = APB_DEVICE(dev);
+    phb = PCI_HOST_BRIDGE(dev);
+    phb->bus = pci_register_bus(DEVICE(phb), "pci",
+                                pci_apb_set_irq, pci_pbm_map_irq, d,
+                                &d->pci_mmio,
+                                get_system_io(),
+                                0, 32, TYPE_PCI_BUS);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     /* apb_config */
@@ -678,18 +685,10 @@ PCIBus *pci_apb_init(hwaddr special_base,
     sysbus_mmio_map(s, 1, special_base + 0x1000000ULL);
     /* pci_ioport */
     sysbus_mmio_map(s, 2, special_base + 0x2000000ULL);
-    d = APB_DEVICE(dev);
 
     memory_region_init(&d->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL);
     memory_region_add_subregion(get_system_memory(), mem_base, &d->pci_mmio);
 
-    phb = PCI_HOST_BRIDGE(dev);
-    phb->bus = pci_register_bus(DEVICE(phb), "pci",
-                                pci_apb_set_irq, pci_pbm_map_irq, d,
-                                &d->pci_mmio,
-                                get_system_io(),
-                                0, 32, TYPE_PCI_BUS);
-
     *pbm_irqs = d->pbm_irqs;
     d->ivec_irqs = ivec_irqs;
 
-- 
MST

[Qemu-devel] [PULL v5 06/57] hw/grackle: fix PCI bus initialization

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

Delay the host-bridge 'realization' until the
PCI root bus is attached.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/grackle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/pci-host/grackle.c b/hw/pci-host/grackle.c
index 8f91216..2c8acda 100644
--- a/hw/pci-host/grackle.c
+++ b/hw/pci-host/grackle.c
@@ -72,7 +72,6 @@ PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic,
     GrackleState *d;
 
     dev = qdev_create(NULL, TYPE_GRACKLE_PCI_HOST_BRIDGE);
-    qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     phb = PCI_HOST_BRIDGE(dev);
     d = GRACKLE_PCI_HOST_BRIDGE(dev);
@@ -92,6 +91,7 @@ PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic,
                                 0, 4, TYPE_PCI_BUS);
 
     pci_create_simple(phb->bus, 0, "grackle");
+    qdev_init_nofail(dev);
 
     sysbus_mmio_map(s, 0, base);
     sysbus_mmio_map(s, 1, base + 0x00200000);
-- 
MST

[Qemu-devel] [PULL v5 07/57] hw/prep: realize the PCI root bus as part of the prep init

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

'Realize' the PCI root bus manually since the 'realize' mechanism
does not propagate to child devices yet.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/prep.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index 487e32e..5580293 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -247,6 +247,7 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
 
     /* TODO Remove once realize propagates to child devices. */
+    object_property_set_bool(OBJECT(&s->pci_bus), true, "realized", errp);
     object_property_set_bool(OBJECT(&s->pci_dev), true, "realized", errp);
 }
 
-- 
MST

[Qemu-devel] [PULL v5 08/57] hw/versatile: realize the PCI root bus as part of the versatile init

[Michael S. Tsirkin]

From: Marcel Apfelbaum <marcel@redhat.com>

'Realize' the PCI root bus manually since the 'realize' mechanism
does not propagate to child devices yet.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/versatile.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/pci-host/versatile.c b/hw/pci-host/versatile.c
index 0792c45..467cbb9 100644
--- a/hw/pci-host/versatile.c
+++ b/hw/pci-host/versatile.c
@@ -455,6 +455,7 @@ static void pci_vpb_realize(DeviceState *dev, Error **errp)
     }
 
     /* TODO Remove once realize propagates to child devices. */
+    object_property_set_bool(OBJECT(&s->pci_bus), true, "realized", errp);
     object_property_set_bool(OBJECT(&s->pci_dev), true, "realized", errp);
 }
 
-- 
MST

[Qemu-devel] [PULL v5 09/57] x86-iommu: introduce parent class

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Introducing parent class for intel-iommu devices named "x86-iommu". This
is preparation work to abstract shared functionalities out from Intel
and AMD IOMMUs. Currently, only the parent class is introduced. It does
nothing yet.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/intel_iommu.h |  3 ++-
 include/hw/i386/x86-iommu.h   | 46 +++++++++++++++++++++++++++++++++++++
 hw/i386/intel_iommu.c         |  5 ++--
 hw/i386/x86-iommu.c           | 53 +++++++++++++++++++++++++++++++++++++++++++
 hw/i386/Makefile.objs         |  2 +-
 5 files changed, 105 insertions(+), 4 deletions(-)
 create mode 100644 include/hw/i386/x86-iommu.h
 create mode 100644 hw/i386/x86-iommu.c

diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index b024ffa..680a0c4 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -23,6 +23,7 @@
 #define INTEL_IOMMU_H
 #include "hw/qdev.h"
 #include "sysemu/dma.h"
+#include "hw/i386/x86-iommu.h"
 
 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
 #define INTEL_IOMMU_DEVICE(obj) \
@@ -90,7 +91,7 @@ struct VTDIOTLBEntry {
 
 /* The iommu (DMAR) device state struct */
 struct IntelIOMMUState {
-    SysBusDevice busdev;
+    X86IOMMUState x86_iommu;
     MemoryRegion csrmem;
     uint8_t csr[DMAR_REG_SIZE];     /* register values */
     uint8_t wmask[DMAR_REG_SIZE];   /* R/W bytes */
diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
new file mode 100644
index 0000000..924f39a
--- /dev/null
+++ b/include/hw/i386/x86-iommu.h
@@ -0,0 +1,46 @@
+/*
+ * Common IOMMU interface for X86 platform
+ *
+ * Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IOMMU_COMMON_H
+#define IOMMU_COMMON_H
+
+#include "hw/sysbus.h"
+
+#define  TYPE_X86_IOMMU_DEVICE  ("x86-iommu")
+#define  X86_IOMMU_DEVICE(obj) \
+    OBJECT_CHECK(X86IOMMUState, (obj), TYPE_X86_IOMMU_DEVICE)
+#define  X86_IOMMU_CLASS(klass) \
+    OBJECT_CLASS_CHECK(X86IOMMUClass, (klass), TYPE_X86_IOMMU_DEVICE)
+#define  X86_IOMMU_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE)
+
+typedef struct X86IOMMUState X86IOMMUState;
+typedef struct X86IOMMUClass X86IOMMUClass;
+
+struct X86IOMMUClass {
+    SysBusDeviceClass parent;
+    /* Intel/AMD specific realize() hook */
+    DeviceRealize realize;
+};
+
+struct X86IOMMUState {
+    SysBusDevice busdev;
+};
+
+#endif
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 464f2a0..a430d7d 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2061,17 +2061,18 @@ static void vtd_realize(DeviceState *dev, Error **errp)
 static void vtd_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    X86IOMMUClass *x86_class = X86_IOMMU_CLASS(klass);
 
     dc->reset = vtd_reset;
-    dc->realize = vtd_realize;
     dc->vmsd = &vtd_vmstate;
     dc->props = vtd_properties;
     dc->hotpluggable = false;
+    x86_class->realize = vtd_realize;
 }
 
 static const TypeInfo vtd_info = {
     .name          = TYPE_INTEL_IOMMU_DEVICE,
-    .parent        = TYPE_SYS_BUS_DEVICE,
+    .parent        = TYPE_X86_IOMMU_DEVICE,
     .instance_size = sizeof(IntelIOMMUState),
     .class_init    = vtd_class_init,
 };
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
new file mode 100644
index 0000000..d739afb
--- /dev/null
+++ b/hw/i386/x86-iommu.c
@@ -0,0 +1,53 @@
+/*
+ * QEMU emulation of common X86 IOMMU
+ *
+ * Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "hw/boards.h"
+#include "hw/i386/x86-iommu.h"
+
+static void x86_iommu_realize(DeviceState *dev, Error **errp)
+{
+    X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev);
+    if (x86_class->realize) {
+        x86_class->realize(dev, errp);
+    }
+}
+
+static void x86_iommu_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    dc->realize = x86_iommu_realize;
+}
+
+static const TypeInfo x86_iommu_info = {
+    .name          = TYPE_X86_IOMMU_DEVICE,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(X86IOMMUState),
+    .class_init    = x86_iommu_class_init,
+    .class_size    = sizeof(X86IOMMUClass),
+    .abstract      = true,
+};
+
+static void x86_iommu_register_types(void)
+{
+    type_register_static(&x86_iommu_info);
+}
+
+type_init(x86_iommu_register_types)
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index b52d5b8..90e94ff 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -2,7 +2,7 @@ obj-$(CONFIG_KVM) += kvm/
 obj-y += multiboot.o
 obj-y += pc.o pc_piix.o pc_q35.o
 obj-y += pc_sysfw.o
-obj-y += intel_iommu.o
+obj-y += x86-iommu.o intel_iommu.o
 obj-$(CONFIG_XEN) += ../xenpv/ xen/
 
 obj-y += kvmvapic.o
-- 
MST

[Qemu-devel] [PULL v5 10/57] intel_iommu: rename VTD_PCI_DEVFN_MAX to x86-iommu

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/intel_iommu.h |  1 -
 include/hw/i386/x86-iommu.h   |  2 ++
 hw/i386/intel_iommu.c         | 11 +++++++----
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 680a0c4..0794309 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -35,7 +35,6 @@
 #define VTD_PCI_BUS_MAX             256
 #define VTD_PCI_SLOT_MAX            32
 #define VTD_PCI_FUNC_MAX            8
-#define VTD_PCI_DEVFN_MAX           256
 #define VTD_PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
 #define VTD_PCI_FUNC(devfn)         ((devfn) & 0x07)
 #define VTD_SID_TO_BUS(sid)         (((sid) >> 8) & 0xff)
diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
index 924f39a..fac693d 100644
--- a/include/hw/i386/x86-iommu.h
+++ b/include/hw/i386/x86-iommu.h
@@ -30,6 +30,8 @@
 #define  X86_IOMMU_GET_CLASS(obj) \
     OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE)
 
+#define X86_IOMMU_PCI_DEVFN_MAX           256
+
 typedef struct X86IOMMUState X86IOMMUState;
 typedef struct X86IOMMUClass X86IOMMUClass;
 
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index a430d7d..3ee5782 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -26,6 +26,8 @@
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_bus.h"
 #include "hw/i386/pc.h"
+#include "hw/boards.h"
+#include "hw/i386/x86-iommu.h"
 
 /*#define DEBUG_INTEL_IOMMU*/
 #ifdef DEBUG_INTEL_IOMMU
@@ -192,7 +194,7 @@ static void vtd_reset_context_cache(IntelIOMMUState *s)
 
     VTD_DPRINTF(CACHE, "global context_cache_gen=1");
     while (g_hash_table_iter_next (&bus_it, NULL, (void**)&vtd_bus)) {
-        for (devfn_it = 0; devfn_it < VTD_PCI_DEVFN_MAX; ++devfn_it) {
+        for (devfn_it = 0; devfn_it < X86_IOMMU_PCI_DEVFN_MAX; ++devfn_it) {
             vtd_as = vtd_bus->dev_as[devfn_it];
             if (!vtd_as) {
                 continue;
@@ -964,7 +966,7 @@ static void vtd_context_device_invalidate(IntelIOMMUState *s,
     vtd_bus = vtd_find_as_from_bus_num(s, VTD_SID_TO_BUS(source_id));
     if (vtd_bus) {
         devfn = VTD_SID_TO_DEVFN(source_id);
-        for (devfn_it = 0; devfn_it < VTD_PCI_DEVFN_MAX; ++devfn_it) {
+        for (devfn_it = 0; devfn_it < X86_IOMMU_PCI_DEVFN_MAX; ++devfn_it) {
             vtd_as = vtd_bus->dev_as[devfn_it];
             if (vtd_as && ((devfn_it & mask) == (devfn & mask))) {
                 VTD_DPRINTF(INV, "invalidate context-cahce of devfn 0x%"PRIx16,
@@ -1916,7 +1918,8 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn)
 
     if (!vtd_bus) {
         /* No corresponding free() */
-        vtd_bus = g_malloc0(sizeof(VTDBus) + sizeof(VTDAddressSpace *) * VTD_PCI_DEVFN_MAX);
+        vtd_bus = g_malloc0(sizeof(VTDBus) + sizeof(VTDAddressSpace *) * \
+                            X86_IOMMU_PCI_DEVFN_MAX);
         vtd_bus->bus = bus;
         key = (uintptr_t)bus;
         g_hash_table_insert(s->vtd_as_by_busptr, &key, vtd_bus);
@@ -2032,7 +2035,7 @@ static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
     IntelIOMMUState *s = opaque;
     VTDAddressSpace *vtd_as;
 
-    assert(0 <= devfn && devfn <= VTD_PCI_DEVFN_MAX);
+    assert(0 <= devfn && devfn <= X86_IOMMU_PCI_DEVFN_MAX);
 
     vtd_as = vtd_find_add_as(s, bus, devfn);
     return &vtd_as->as;
-- 
MST

[Qemu-devel] [PULL v5 11/57] x86-iommu: provide x86_iommu_get_default

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Instead of searching the device tree every time, one static variable is
declared for the default system x86 IOMMU device.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/x86-iommu.h |  6 ++++++
 hw/i386/acpi-build.c        |  9 ++-------
 hw/i386/x86-iommu.c         | 23 +++++++++++++++++++++++
 3 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
index fac693d..b2401a6 100644
--- a/include/hw/i386/x86-iommu.h
+++ b/include/hw/i386/x86-iommu.h
@@ -45,4 +45,10 @@ struct X86IOMMUState {
     SysBusDevice busdev;
 };
 
+/**
+ * x86_iommu_get_default - get default IOMMU device
+ * @return: pointer to default IOMMU device
+ */
+X86IOMMUState *x86_iommu_get_default(void);
+
 #endif
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index fbba461..12ecf95 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -52,7 +52,7 @@
 #include "hw/i386/ich9.h"
 #include "hw/pci/pci_bus.h"
 #include "hw/pci-host/q35.h"
-#include "hw/i386/intel_iommu.h"
+#include "hw/i386/x86-iommu.h"
 #include "hw/timer/hpet.h"
 
 #include "hw/acpi/aml-build.h"
@@ -2539,12 +2539,7 @@ static bool acpi_get_mcfg(AcpiMcfgInfo *mcfg)
 
 static bool acpi_has_iommu(void)
 {
-    bool ambiguous;
-    Object *intel_iommu;
-
-    intel_iommu = object_resolve_path_type("", TYPE_INTEL_IOMMU_DEVICE,
-                                           &ambiguous);
-    return intel_iommu && !ambiguous;
+    return !!x86_iommu_get_default();
 }
 
 static
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index d739afb..f395139 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -21,6 +21,28 @@
 #include "hw/sysbus.h"
 #include "hw/boards.h"
 #include "hw/i386/x86-iommu.h"
+#include "qemu/error-report.h"
+
+/* Default X86 IOMMU device */
+static X86IOMMUState *x86_iommu_default = NULL;
+
+static void x86_iommu_set_default(X86IOMMUState *x86_iommu)
+{
+    assert(x86_iommu);
+
+    if (x86_iommu_default) {
+        error_report("QEMU does not support multiple vIOMMUs "
+                     "for x86 yet.");
+        exit(1);
+    }
+
+    x86_iommu_default = x86_iommu;
+}
+
+X86IOMMUState *x86_iommu_get_default(void)
+{
+    return x86_iommu_default;
+}
 
 static void x86_iommu_realize(DeviceState *dev, Error **errp)
 {
@@ -28,6 +50,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
     if (x86_class->realize) {
         x86_class->realize(dev, errp);
     }
+    x86_iommu_set_default(X86_IOMMU_DEVICE(dev));
 }
 
 static void x86_iommu_class_init(ObjectClass *klass, void *data)
-- 
MST

[Qemu-devel] [PULL v5 12/57] x86-iommu: introduce "intremap" property

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Adding one property for intel-iommu devices to specify whether we should
support interrupt remapping. By default, IR is disabled. To enable it,
we should use (take Intel IOMMU as example):

  -device intel_iommu,intremap=on

This property can be shared by Intel and future AMD IOMMUs.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/x86-iommu.h |  1 +
 hw/i386/x86-iommu.c         | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
index b2401a6..699dd06 100644
--- a/include/hw/i386/x86-iommu.h
+++ b/include/hw/i386/x86-iommu.h
@@ -43,6 +43,7 @@ struct X86IOMMUClass {
 
 struct X86IOMMUState {
     SysBusDevice busdev;
+    bool intr_supported;        /* Whether vIOMMU supports IR */
 };
 
 /**
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index f395139..4280839 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -59,9 +59,32 @@ static void x86_iommu_class_init(ObjectClass *klass, void *data)
     dc->realize = x86_iommu_realize;
 }
 
+static bool x86_iommu_intremap_prop_get(Object *o, Error **errp)
+{
+    X86IOMMUState *s = X86_IOMMU_DEVICE(o);
+    return s->intr_supported;
+}
+
+static void x86_iommu_intremap_prop_set(Object *o, bool value, Error **errp)
+{
+    X86IOMMUState *s = X86_IOMMU_DEVICE(o);
+    s->intr_supported = value;
+}
+
+static void x86_iommu_instance_init(Object *o)
+{
+    X86IOMMUState *s = X86_IOMMU_DEVICE(o);
+
+    /* By default, do not support IR */
+    s->intr_supported = false;
+    object_property_add_bool(o, "intremap", x86_iommu_intremap_prop_get,
+                             x86_iommu_intremap_prop_set, NULL);
+}
+
 static const TypeInfo x86_iommu_info = {
     .name          = TYPE_X86_IOMMU_DEVICE,
     .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_init = x86_iommu_instance_init,
     .instance_size = sizeof(X86IOMMUState),
     .class_init    = x86_iommu_class_init,
     .class_size    = sizeof(X86IOMMUClass),
-- 
MST

[Qemu-devel] [PULL v5 13/57] acpi: enable INTR for DMAR report structure

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

In ACPI DMA remapping report structure, enable INTR flag when specified.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/intel_iommu.h |  2 ++
 hw/i386/acpi-build.c          | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 0794309..741242e 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -44,6 +44,8 @@
 #define VTD_HOST_ADDRESS_WIDTH      39
 #define VTD_HAW_MASK                ((1ULL << VTD_HOST_ADDRESS_WIDTH) - 1)
 
+#define DMAR_REPORT_F_INTR          (1)
+
 typedef struct VTDContextEntry VTDContextEntry;
 typedef struct VTDContextCacheEntry VTDContextCacheEntry;
 typedef struct IntelIOMMUState IntelIOMMUState;
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 12ecf95..06682f1 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -59,6 +59,7 @@
 
 #include "qapi/qmp/qint.h"
 #include "qom/qom-qobject.h"
+#include "hw/i386/x86-iommu.h"
 
 #include "hw/acpi/ipmi.h"
 
@@ -2454,6 +2455,10 @@ build_mcfg_q35(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
     build_header(linker, table_data, (void *)mcfg, sig, len, 1, NULL, NULL);
 }
 
+/*
+ * VT-d spec 8.1 DMA Remapping Reporting Structure
+ * (version Oct. 2014 or later)
+ */
 static void
 build_dmar_q35(GArray *table_data, BIOSLinker *linker)
 {
@@ -2461,10 +2466,17 @@ build_dmar_q35(GArray *table_data, BIOSLinker *linker)
 
     AcpiTableDmar *dmar;
     AcpiDmarHardwareUnit *drhd;
+    uint8_t dmar_flags = 0;
+    X86IOMMUState *iommu = x86_iommu_get_default();
+
+    assert(iommu);
+    if (iommu->intr_supported) {
+        dmar_flags |= 0x1;      /* Flags: 0x1: INT_REMAP */
+    }
 
     dmar = acpi_data_push(table_data, sizeof(*dmar));
     dmar->host_address_width = VTD_HOST_ADDRESS_WIDTH - 1;
-    dmar->flags = 0;    /* No intr_remap for now */
+    dmar->flags = dmar_flags;
 
     /* DMAR Remapping Hardware Unit Definition structure */
     drhd = acpi_data_push(table_data, sizeof(*drhd));
-- 
MST

[Qemu-devel] [PULL v5 14/57] intel_iommu: allow queued invalidation for IR

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Queued invalidation is required for IR. This patch add basic support for
interrupt cache invalidate requests. Since we currently have no IR cache
implemented yet, we can just skip all interrupt cache invalidation
requests for now.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h | 2 ++
 hw/i386/intel_iommu.c          | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index e5f514c..b648e69 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -286,6 +286,8 @@ typedef struct VTDInvDesc VTDInvDesc;
 #define VTD_INV_DESC_TYPE               0xf
 #define VTD_INV_DESC_CC                 0x1 /* Context-cache Invalidate Desc */
 #define VTD_INV_DESC_IOTLB              0x2
+#define VTD_INV_DESC_IEC                0x4 /* Interrupt Entry Cache
+                                               Invalidate Descriptor */
 #define VTD_INV_DESC_WAIT               0x5 /* Invalidation Wait Descriptor */
 #define VTD_INV_DESC_NONE               0   /* Not an Invalidate Descriptor */
 
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 3ee5782..26e322a 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1404,6 +1404,15 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
         }
         break;
 
+    case VTD_INV_DESC_IEC:
+        VTD_DPRINTF(INV, "Interrupt Entry Cache Invalidation "
+                    "not implemented yet");
+        /*
+         * Since currently we do not cache interrupt entries, we can
+         * just mark this descriptor as "good" and move on.
+         */
+        break;
+
     default:
         VTD_DPRINTF(GENERAL, "error: unkonw Invalidation Descriptor type "
                     "hi 0x%"PRIx64 " lo 0x%"PRIx64 " type %"PRIu8,
-- 
MST

[Qemu-devel] [PULL v5 15/57] intel_iommu: set IR bit for ECAP register

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Enable IR in IOMMU Extended Capability register.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h | 2 ++
 hw/i386/intel_iommu.c          | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index b648e69..5b98a11 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -176,6 +176,8 @@
 /* (offset >> 4) << 8 */
 #define VTD_ECAP_IRO                (DMAR_IOTLB_REG_OFFSET << 4)
 #define VTD_ECAP_QI                 (1ULL << 1)
+/* Interrupt Remapping support */
+#define VTD_ECAP_IR                 (1ULL << 3)
 
 /* CAP_REG */
 /* (offset >> 4) << 24 */
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 26e322a..9c7a084 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1956,6 +1956,8 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn)
  */
 static void vtd_init(IntelIOMMUState *s)
 {
+    X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s);
+
     memset(s->csr, 0, DMAR_REG_SIZE);
     memset(s->wmask, 0, DMAR_REG_SIZE);
     memset(s->w1cmask, 0, DMAR_REG_SIZE);
@@ -1977,6 +1979,10 @@ static void vtd_init(IntelIOMMUState *s)
              VTD_CAP_SAGAW | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS;
     s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
 
+    if (x86_iommu->intr_supported) {
+        s->ecap |= VTD_ECAP_IR;
+    }
+
     vtd_reset_context_cache(s);
     vtd_reset_iotlb(s);
 
-- 
MST

[Qemu-devel] [PULL v5 16/57] acpi: add DMAR scope definition for root IOAPIC

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

To enable interrupt remapping for intel IOMMU device, each IOAPIC device
in the system reported via ACPI MADT must be explicitly enumerated under
one specific remapping hardware unit. This patch adds the root-complex
IOAPIC into the default DMAR device.

Please refer to VT-d spec 8.3.1.1 for more information.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/acpi/acpi-defs.h | 13 +++++++++++++
 include/hw/pci-host/q35.h   |  8 ++++++++
 hw/i386/acpi-build.c        | 20 +++++++++++++++++---
 3 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index ea9be0b..41c1d95 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -571,6 +571,18 @@ enum {
 /*
  * Sub-structures for DMAR
  */
+
+/* Device scope structure for DRHD. */
+struct AcpiDmarDeviceScope {
+    uint8_t entry_type;
+    uint8_t length;
+    uint16_t reserved;
+    uint8_t enumeration_id;
+    uint8_t bus;
+    uint16_t path[0];           /* list of dev:func pairs */
+} QEMU_PACKED;
+typedef struct AcpiDmarDeviceScope AcpiDmarDeviceScope;
+
 /* Type 0: Hardware Unit Definition */
 struct AcpiDmarHardwareUnit {
     uint16_t type;
@@ -579,6 +591,7 @@ struct AcpiDmarHardwareUnit {
     uint8_t reserved;
     uint16_t pci_segment;   /* The PCI Segment associated with this unit */
     uint64_t address;   /* Base address of remapping hardware register-set */
+    AcpiDmarDeviceScope scope[0];
 } QEMU_PACKED;
 typedef struct AcpiDmarHardwareUnit AcpiDmarHardwareUnit;
 
diff --git a/include/hw/pci-host/q35.h b/include/hw/pci-host/q35.h
index 0d64032..94486fd 100644
--- a/include/hw/pci-host/q35.h
+++ b/include/hw/pci-host/q35.h
@@ -179,4 +179,12 @@ typedef struct Q35PCIHost {
 
 uint64_t mch_mcfg_base(void);
 
+/*
+ * Arbitary but unique BNF number for IOAPIC device.
+ *
+ * TODO: make sure there would have no conflict with real PCI bus
+ */
+#define Q35_PSEUDO_BUS_PLATFORM         (0xff)
+#define Q35_PSEUDO_DEVFN_IOAPIC         (0x00)
+
 #endif /* HW_Q35_H */
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 06682f1..77c40d9 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -81,6 +81,9 @@
 #define ACPI_BUILD_DPRINTF(fmt, ...)
 #endif
 
+/* Default IOAPIC ID */
+#define ACPI_BUILD_IOAPIC_ID 0x0
+
 typedef struct AcpiMcfgInfo {
     uint64_t mcfg_base;
     uint32_t mcfg_size;
@@ -384,7 +387,6 @@ build_madt(GArray *table_data, BIOSLinker *linker, PCMachineState *pcms)
     io_apic = acpi_data_push(table_data, sizeof *io_apic);
     io_apic->type = ACPI_APIC_IO;
     io_apic->length = sizeof(*io_apic);
-#define ACPI_BUILD_IOAPIC_ID 0x0
     io_apic->io_apic_id = ACPI_BUILD_IOAPIC_ID;
     io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS);
     io_apic->interrupt = cpu_to_le32(0);
@@ -2468,6 +2470,9 @@ build_dmar_q35(GArray *table_data, BIOSLinker *linker)
     AcpiDmarHardwareUnit *drhd;
     uint8_t dmar_flags = 0;
     X86IOMMUState *iommu = x86_iommu_get_default();
+    AcpiDmarDeviceScope *scope = NULL;
+    /* Root complex IOAPIC use one path[0] only */
+    size_t ioapic_scope_size = sizeof(*scope) + sizeof(scope->path[0]);
 
     assert(iommu);
     if (iommu->intr_supported) {
@@ -2479,13 +2484,22 @@ build_dmar_q35(GArray *table_data, BIOSLinker *linker)
     dmar->flags = dmar_flags;
 
     /* DMAR Remapping Hardware Unit Definition structure */
-    drhd = acpi_data_push(table_data, sizeof(*drhd));
+    drhd = acpi_data_push(table_data, sizeof(*drhd) + ioapic_scope_size);
     drhd->type = cpu_to_le16(ACPI_DMAR_TYPE_HARDWARE_UNIT);
-    drhd->length = cpu_to_le16(sizeof(*drhd));   /* No device scope now */
+    drhd->length = cpu_to_le16(sizeof(*drhd) + ioapic_scope_size);
     drhd->flags = ACPI_DMAR_INCLUDE_PCI_ALL;
     drhd->pci_segment = cpu_to_le16(0);
     drhd->address = cpu_to_le64(Q35_HOST_BRIDGE_IOMMU_ADDR);
 
+    /* Scope definition for the root-complex IOAPIC. See VT-d spec
+     * 8.3.1 (version Oct. 2014 or later). */
+    scope = &drhd->scope[0];
+    scope->entry_type = 0x03;   /* Type: 0x03 for IOAPIC */
+    scope->length = ioapic_scope_size;
+    scope->enumeration_id = ACPI_BUILD_IOAPIC_ID;
+    scope->bus = Q35_PSEUDO_BUS_PLATFORM;
+    scope->path[0] = cpu_to_le16(Q35_PSEUDO_DEVFN_IOAPIC);
+
     build_header(linker, table_data, (void *)(table_data->data + dmar_start),
                  "DMAR", table_data->len - dmar_start, 1, NULL, NULL);
 }
-- 
MST

[Qemu-devel] [PULL v5 17/57] intel_iommu: define interrupt remap table addr register

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Defined Interrupt Remap Table Address register to store IR table
pointer. Also, do proper handling on global command register writes to
store table pointer and its size.

One more debug flag "DEBUG_IR" is added for interrupt remapping.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h |  4 ++++
 include/hw/i386/intel_iommu.h  |  5 ++++
 hw/i386/intel_iommu.c          | 52 +++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 5b98a11..309833f 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -172,6 +172,10 @@
 #define VTD_RTADDR_RTT              (1ULL << 11)
 #define VTD_RTADDR_ADDR_MASK        (VTD_HAW_MASK ^ 0xfffULL)
 
+/* IRTA_REG */
+#define VTD_IRTA_ADDR_MASK          (VTD_HAW_MASK ^ 0xfffULL)
+#define VTD_IRTA_SIZE_MASK          (0xfULL)
+
 /* ECAP_REG */
 /* (offset >> 4) << 8 */
 #define VTD_ECAP_IRO                (DMAR_IOTLB_REG_OFFSET << 4)
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 741242e..ce515c4 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -125,6 +125,11 @@ struct IntelIOMMUState {
     MemoryRegionIOMMUOps iommu_ops;
     GHashTable *vtd_as_by_busptr;   /* VTDBus objects indexed by PCIBus* reference */
     VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */
+
+    /* interrupt remapping */
+    bool intr_enabled;              /* Whether guest enabled IR */
+    dma_addr_t intr_root;           /* Interrupt remapping table pointer */
+    uint32_t intr_size;             /* Number of IR table entries */
 };
 
 /* Find the VTD Address space associated with the given bus pointer,
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 9c7a084..bf74533 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -33,7 +33,7 @@
 #ifdef DEBUG_INTEL_IOMMU
 enum {
     DEBUG_GENERAL, DEBUG_CSR, DEBUG_INV, DEBUG_MMU, DEBUG_FLOG,
-    DEBUG_CACHE,
+    DEBUG_CACHE, DEBUG_IR,
 };
 #define VTD_DBGBIT(x)   (1 << DEBUG_##x)
 static int vtd_dbgflags = VTD_DBGBIT(GENERAL) | VTD_DBGBIT(CSR);
@@ -903,6 +903,19 @@ static void vtd_root_table_setup(IntelIOMMUState *s)
                 (s->root_extended ? "(extended)" : ""));
 }
 
+static void vtd_interrupt_remap_table_setup(IntelIOMMUState *s)
+{
+    uint64_t value = 0;
+    value = vtd_get_quad_raw(s, DMAR_IRTA_REG);
+    s->intr_size = 1UL << ((value & VTD_IRTA_SIZE_MASK) + 1);
+    s->intr_root = value & VTD_IRTA_ADDR_MASK;
+
+    /* TODO: invalidate interrupt entry cache */
+
+    VTD_DPRINTF(CSR, "int remap table addr 0x%"PRIx64 " size %"PRIu32,
+                s->intr_root, s->intr_size);
+}
+
 static void vtd_context_global_invalidate(IntelIOMMUState *s)
 {
     s->context_cache_gen++;
@@ -1141,6 +1154,16 @@ static void vtd_handle_gcmd_srtp(IntelIOMMUState *s)
     vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_RTPS);
 }
 
+/* Set Interrupt Remap Table Pointer */
+static void vtd_handle_gcmd_sirtp(IntelIOMMUState *s)
+{
+    VTD_DPRINTF(CSR, "set Interrupt Remap Table Pointer");
+
+    vtd_interrupt_remap_table_setup(s);
+    /* Ok - report back to driver */
+    vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_IRTPS);
+}
+
 /* Handle Translation Enable/Disable */
 static void vtd_handle_gcmd_te(IntelIOMMUState *s, bool en)
 {
@@ -1180,6 +1203,10 @@ static void vtd_handle_gcmd_write(IntelIOMMUState *s)
         /* Queued Invalidation Enable */
         vtd_handle_gcmd_qie(s, val & VTD_GCMD_QIE);
     }
+    if (val & VTD_GCMD_SIRTP) {
+        /* Set/update the interrupt remapping root-table pointer */
+        vtd_handle_gcmd_sirtp(s);
+    }
 }
 
 /* Handle write to Context Command Register */
@@ -1841,6 +1868,23 @@ static void vtd_mem_write(void *opaque, hwaddr addr,
         vtd_update_fsts_ppf(s);
         break;
 
+    case DMAR_IRTA_REG:
+        VTD_DPRINTF(IR, "DMAR_IRTA_REG write addr 0x%"PRIx64
+                    ", size %d, val 0x%"PRIx64, addr, size, val);
+        if (size == 4) {
+            vtd_set_long(s, addr, val);
+        } else {
+            vtd_set_quad(s, addr, val);
+        }
+        break;
+
+    case DMAR_IRTA_REG_HI:
+        VTD_DPRINTF(IR, "DMAR_IRTA_REG_HI write addr 0x%"PRIx64
+                    ", size %d, val 0x%"PRIx64, addr, size, val);
+        assert(size == 4);
+        vtd_set_long(s, addr, val);
+        break;
+
     default:
         VTD_DPRINTF(GENERAL, "error: unhandled reg write addr 0x%"PRIx64
                     ", size %d, val 0x%"PRIx64, addr, size, val);
@@ -2032,6 +2076,12 @@ static void vtd_init(IntelIOMMUState *s)
     /* Fault Recording Registers, 128-bit */
     vtd_define_quad(s, DMAR_FRCD_REG_0_0, 0, 0, 0);
     vtd_define_quad(s, DMAR_FRCD_REG_0_2, 0, 0, 0x8000000000000000ULL);
+
+    /*
+     * Interrupt remapping registers, not support extended interrupt
+     * mode for now.
+     */
+    vtd_define_quad(s, DMAR_IRTA_REG, 0, 0xfffffffffffff00fULL, 0);
 }
 
 /* Should not reset address_spaces when reset because devices will still use
-- 
MST

[Qemu-devel] [PULL v5 18/57] intel_iommu: handle interrupt remap enable

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Handle writting to IRE bit in global command register.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index bf74533..6a6cb3b 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1183,6 +1183,22 @@ static void vtd_handle_gcmd_te(IntelIOMMUState *s, bool en)
     }
 }
 
+/* Handle Interrupt Remap Enable/Disable */
+static void vtd_handle_gcmd_ire(IntelIOMMUState *s, bool en)
+{
+    VTD_DPRINTF(CSR, "Interrupt Remap Enable %s", (en ? "on" : "off"));
+
+    if (en) {
+        s->intr_enabled = true;
+        /* Ok - report back to driver */
+        vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_IRES);
+    } else {
+        s->intr_enabled = false;
+        /* Ok - report back to driver */
+        vtd_set_clear_mask_long(s, DMAR_GSTS_REG, VTD_GSTS_IRES, 0);
+    }
+}
+
 /* Handle write to Global Command Register */
 static void vtd_handle_gcmd_write(IntelIOMMUState *s)
 {
@@ -1207,6 +1223,10 @@ static void vtd_handle_gcmd_write(IntelIOMMUState *s)
         /* Set/update the interrupt remapping root-table pointer */
         vtd_handle_gcmd_sirtp(s);
     }
+    if (changed & VTD_GCMD_IRE) {
+        /* Interrupt remap enable/disable */
+        vtd_handle_gcmd_ire(s, val & VTD_GCMD_IRE);
+    }
 }
 
 /* Handle write to Context Command Register */
-- 
MST

[Qemu-devel] [PULL v5 19/57] intel_iommu: define several structs for IOMMU IR

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Several data structs are defined to better support the rest of the
patches: IRTE to parse remapping table entries, and IOAPIC/MSI related
structure bits to parse interrupt entries to be filled in by guest
kernel.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/intel_iommu.h | 74 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index ce515c4..260aa8e 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -52,6 +52,8 @@ typedef struct IntelIOMMUState IntelIOMMUState;
 typedef struct VTDAddressSpace VTDAddressSpace;
 typedef struct VTDIOTLBEntry VTDIOTLBEntry;
 typedef struct VTDBus VTDBus;
+typedef union VTD_IRTE VTD_IRTE;
+typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress;
 
 /* Context-Entry */
 struct VTDContextEntry {
@@ -90,6 +92,78 @@ struct VTDIOTLBEntry {
     bool write_flags;
 };
 
+/* Interrupt Remapping Table Entry Definition */
+union VTD_IRTE {
+    struct {
+#ifdef HOST_WORDS_BIGENDIAN
+        uint32_t dest_id:32;         /* Destination ID */
+        uint32_t __reserved_1:8;     /* Reserved 1 */
+        uint32_t vector:8;           /* Interrupt Vector */
+        uint32_t irte_mode:1;        /* IRTE Mode */
+        uint32_t __reserved_0:3;     /* Reserved 0 */
+        uint32_t __avail:4;          /* Available spaces for software */
+        uint32_t delivery_mode:3;    /* Delivery Mode */
+        uint32_t trigger_mode:1;     /* Trigger Mode */
+        uint32_t redir_hint:1;       /* Redirection Hint */
+        uint32_t dest_mode:1;        /* Destination Mode */
+        uint32_t fault_disable:1;    /* Fault Processing Disable */
+        uint32_t present:1;          /* Whether entry present/available */
+#else
+        uint32_t present:1;          /* Whether entry present/available */
+        uint32_t fault_disable:1;    /* Fault Processing Disable */
+        uint32_t dest_mode:1;        /* Destination Mode */
+        uint32_t redir_hint:1;       /* Redirection Hint */
+        uint32_t trigger_mode:1;     /* Trigger Mode */
+        uint32_t delivery_mode:3;    /* Delivery Mode */
+        uint32_t __avail:4;          /* Available spaces for software */
+        uint32_t __reserved_0:3;     /* Reserved 0 */
+        uint32_t irte_mode:1;        /* IRTE Mode */
+        uint32_t vector:8;           /* Interrupt Vector */
+        uint32_t __reserved_1:8;     /* Reserved 1 */
+        uint32_t dest_id:32;         /* Destination ID */
+#endif
+        uint16_t source_id:16;       /* Source-ID */
+#ifdef HOST_WORDS_BIGENDIAN
+        uint64_t __reserved_2:44;    /* Reserved 2 */
+        uint64_t sid_vtype:2;        /* Source-ID Validation Type */
+        uint64_t sid_q:2;            /* Source-ID Qualifier */
+#else
+        uint64_t sid_q:2;            /* Source-ID Qualifier */
+        uint64_t sid_vtype:2;        /* Source-ID Validation Type */
+        uint64_t __reserved_2:44;    /* Reserved 2 */
+#endif
+    } QEMU_PACKED;
+    uint64_t data[2];
+};
+
+#define VTD_IR_INT_FORMAT_COMPAT     (0) /* Compatible Interrupt */
+#define VTD_IR_INT_FORMAT_REMAP      (1) /* Remappable Interrupt */
+
+/* Programming format for MSI/MSI-X addresses */
+union VTD_IR_MSIAddress {
+    struct {
+#ifdef HOST_WORDS_BIGENDIAN
+        uint32_t __head:12;          /* Should always be: 0x0fee */
+        uint32_t index_l:15;         /* Interrupt index bit 14-0 */
+        uint32_t int_mode:1;         /* Interrupt format */
+        uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
+        uint32_t index_h:1;          /* Interrupt index bit 15 */
+        uint32_t __not_care:2;
+#else
+        uint32_t __not_care:2;
+        uint32_t index_h:1;          /* Interrupt index bit 15 */
+        uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
+        uint32_t int_mode:1;         /* Interrupt format */
+        uint32_t index_l:15;         /* Interrupt index bit 14-0 */
+        uint32_t __head:12;          /* Should always be: 0x0fee */
+#endif
+    } QEMU_PACKED;
+    uint32_t data;
+};
+
+/* When IR is enabled, all MSI/MSI-X data bits should be zero */
+#define VTD_IR_MSI_DATA          (0)
+
 /* The iommu (DMAR) device state struct */
 struct IntelIOMMUState {
     X86IOMMUState x86_iommu;
-- 
MST

[Qemu-devel] [PULL v5 20/57] intel_iommu: add IR translation faults defines

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Adding translation fault definitions for interrupt remapping. Please
refer to VT-d spec section 7.1.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 309833f..2a9987f 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -271,6 +271,19 @@ typedef enum VTDFaultReason {
      * context-entry.
      */
     VTD_FR_CONTEXT_ENTRY_TT,
+
+    /* Interrupt remapping transition faults */
+    VTD_FR_IR_REQ_RSVD = 0x20, /* One or more IR request reserved
+                                * fields set */
+    VTD_FR_IR_INDEX_OVER = 0x21, /* Index value greater than max */
+    VTD_FR_IR_ENTRY_P = 0x22,    /* Present (P) not set in IRTE */
+    VTD_FR_IR_ROOT_INVAL = 0x23, /* IR Root table invalid */
+    VTD_FR_IR_IRTE_RSVD = 0x24,  /* IRTE Rsvd field non-zero with
+                                  * Present flag set */
+    VTD_FR_IR_REQ_COMPAT = 0x25, /* Encountered compatible IR
+                                  * request while disabled */
+    VTD_FR_IR_SID_ERR = 0x26,   /* Invalid Source-ID */
+
     /* This is not a normal fault reason. We use this to indicate some faults
      * that are not referenced by the VT-d specification.
      * Fault event with such reason should not be recorded.
-- 
MST

[Qemu-devel] [PULL v5 21/57] intel_iommu: Add support for PCI MSI remap

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

This patch enables interrupt remapping for PCI devices.

To play the trick, one memory region "iommu_ir" is added as child region
of the original iommu memory region, covering range 0xfeeXXXXX (which is
the address range for APIC). All the writes to this range will be taken
as MSI, and translation is carried out only when IR is enabled.

Idea suggested by Paolo Bonzini.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h |   2 +
 include/hw/i386/intel_iommu.h  |  66 ++++++++++++
 hw/i386/intel_iommu.c          | 239 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 307 insertions(+)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 2a9987f..e1a08cb 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -110,6 +110,8 @@
 /* Interrupt Address Range */
 #define VTD_INTERRUPT_ADDR_FIRST    0xfee00000ULL
 #define VTD_INTERRUPT_ADDR_LAST     0xfeefffffULL
+#define VTD_INTERRUPT_ADDR_SIZE     (VTD_INTERRUPT_ADDR_LAST - \
+                                     VTD_INTERRUPT_ADDR_FIRST + 1)
 
 /* The shift of source_id in the key of IOTLB hash table */
 #define VTD_IOTLB_SID_SHIFT         36
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 260aa8e..cdbbddd 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -24,6 +24,8 @@
 #include "hw/qdev.h"
 #include "sysemu/dma.h"
 #include "hw/i386/x86-iommu.h"
+#include "hw/i386/ioapic.h"
+#include "hw/pci/msi.h"
 
 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
 #define INTEL_IOMMU_DEVICE(obj) \
@@ -46,6 +48,10 @@
 
 #define DMAR_REPORT_F_INTR          (1)
 
+#define  VTD_MSI_ADDR_HI_MASK        (0xffffffff00000000ULL)
+#define  VTD_MSI_ADDR_HI_SHIFT       (32)
+#define  VTD_MSI_ADDR_LO_MASK        (0x00000000ffffffffULL)
+
 typedef struct VTDContextEntry VTDContextEntry;
 typedef struct VTDContextCacheEntry VTDContextCacheEntry;
 typedef struct IntelIOMMUState IntelIOMMUState;
@@ -54,6 +60,8 @@ typedef struct VTDIOTLBEntry VTDIOTLBEntry;
 typedef struct VTDBus VTDBus;
 typedef union VTD_IRTE VTD_IRTE;
 typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress;
+typedef struct VTDIrq VTDIrq;
+typedef struct VTD_MSIMessage VTD_MSIMessage;
 
 /* Context-Entry */
 struct VTDContextEntry {
@@ -74,6 +82,7 @@ struct VTDAddressSpace {
     uint8_t devfn;
     AddressSpace as;
     MemoryRegion iommu;
+    MemoryRegion iommu_ir;      /* Interrupt region: 0xfeeXXXXX */
     IntelIOMMUState *iommu_state;
     VTDContextCacheEntry context_cache_entry;
 };
@@ -161,6 +170,63 @@ union VTD_IR_MSIAddress {
     uint32_t data;
 };
 
+/* Generic IRQ entry information */
+struct VTDIrq {
+    /* Used by both IOAPIC/MSI interrupt remapping */
+    uint8_t trigger_mode;
+    uint8_t vector;
+    uint8_t delivery_mode;
+    uint32_t dest;
+    uint8_t dest_mode;
+
+    /* only used by MSI interrupt remapping */
+    uint8_t redir_hint;
+    uint8_t msi_addr_last_bits;
+};
+
+struct VTD_MSIMessage {
+    union {
+        struct {
+#ifdef HOST_WORDS_BIGENDIAN
+            uint32_t __addr_head:12; /* 0xfee */
+            uint32_t dest:8;
+            uint32_t __reserved:8;
+            uint32_t redir_hint:1;
+            uint32_t dest_mode:1;
+            uint32_t __not_used:2;
+#else
+            uint32_t __not_used:2;
+            uint32_t dest_mode:1;
+            uint32_t redir_hint:1;
+            uint32_t __reserved:8;
+            uint32_t dest:8;
+            uint32_t __addr_head:12; /* 0xfee */
+#endif
+            uint32_t __addr_hi:32;
+        } QEMU_PACKED;
+        uint64_t msi_addr;
+    };
+    union {
+        struct {
+#ifdef HOST_WORDS_BIGENDIAN
+            uint16_t trigger_mode:1;
+            uint16_t level:1;
+            uint16_t __resved:3;
+            uint16_t delivery_mode:3;
+            uint16_t vector:8;
+#else
+            uint16_t vector:8;
+            uint16_t delivery_mode:3;
+            uint16_t __resved:3;
+            uint16_t level:1;
+            uint16_t trigger_mode:1;
+#endif
+            uint16_t __resved1:16;
+        } QEMU_PACKED;
+        uint32_t msi_data;
+    };
+};
+
 /* When IR is enabled, all MSI/MSI-X data bits should be zero */
 #define VTD_IR_MSI_DATA          (0)
 
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 6a6cb3b..2e57396 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1982,6 +1982,240 @@ static Property vtd_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+/* Read IRTE entry with specific index */
+static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
+                        VTD_IRTE *entry)
+{
+    dma_addr_t addr = 0x00;
+
+    addr = iommu->intr_root + index * sizeof(*entry);
+    if (dma_memory_read(&address_space_memory, addr, entry,
+                        sizeof(*entry))) {
+        VTD_DPRINTF(GENERAL, "error: fail to access IR root at 0x%"PRIx64
+                    " + %"PRIu16, iommu->intr_root, index);
+        return -VTD_FR_IR_ROOT_INVAL;
+    }
+
+    if (!entry->present) {
+        VTD_DPRINTF(GENERAL, "error: present flag not set in IRTE"
+                    " entry index %u value 0x%"PRIx64 " 0x%"PRIx64,
+                    index, le64_to_cpu(entry->data[1]),
+                    le64_to_cpu(entry->data[0]));
+        return -VTD_FR_IR_ENTRY_P;
+    }
+
+    if (entry->__reserved_0 || entry->__reserved_1 || \
+        entry->__reserved_2) {
+        VTD_DPRINTF(GENERAL, "error: IRTE entry index %"PRIu16
+                    " reserved fields non-zero: 0x%"PRIx64 " 0x%"PRIx64,
+                    index, le64_to_cpu(entry->data[1]),
+                    le64_to_cpu(entry->data[0]));
+        return -VTD_FR_IR_IRTE_RSVD;
+    }
+
+    /*
+     * TODO: Check Source-ID corresponds to SVT (Source Validation
+     * Type) bits
+     */
+
+    return 0;
+}
+
+/* Fetch IRQ information of specific IR index */
+static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index, VTDIrq *irq)
+{
+    VTD_IRTE irte = { 0 };
+    int ret = 0;
+
+    ret = vtd_irte_get(iommu, index, &irte);
+    if (ret) {
+        return ret;
+    }
+
+    irq->trigger_mode = irte.trigger_mode;
+    irq->vector = irte.vector;
+    irq->delivery_mode = irte.delivery_mode;
+    /* Not support EIM yet: please refer to vt-d 9.10 DST bits */
+#define  VTD_IR_APIC_DEST_MASK         (0xff00ULL)
+#define  VTD_IR_APIC_DEST_SHIFT        (8)
+    irq->dest = (le32_to_cpu(irte.dest_id) & VTD_IR_APIC_DEST_MASK) >> \
+        VTD_IR_APIC_DEST_SHIFT;
+    irq->dest_mode = irte.dest_mode;
+    irq->redir_hint = irte.redir_hint;
+
+    VTD_DPRINTF(IR, "remapping interrupt index %d: trig:%u,vec:%u,"
+                "deliver:%u,dest:%u,dest_mode:%u", index,
+                irq->trigger_mode, irq->vector, irq->delivery_mode,
+                irq->dest, irq->dest_mode);
+
+    return 0;
+}
+
+/* Generate one MSI message from VTDIrq info */
+static void vtd_generate_msi_message(VTDIrq *irq, MSIMessage *msg_out)
+{
+    VTD_MSIMessage msg = {};
+
+    /* Generate address bits */
+    msg.dest_mode = irq->dest_mode;
+    msg.redir_hint = irq->redir_hint;
+    msg.dest = irq->dest;
+    msg.__addr_head = cpu_to_le32(0xfee);
+    /* Keep this from original MSI address bits */
+    msg.__not_used = irq->msi_addr_last_bits;
+
+    /* Generate data bits */
+    msg.vector = irq->vector;
+    msg.delivery_mode = irq->delivery_mode;
+    msg.level = 1;
+    msg.trigger_mode = irq->trigger_mode;
+
+    msg_out->address = msg.msi_addr;
+    msg_out->data = msg.msi_data;
+}
+
+/* Interrupt remapping for MSI/MSI-X entry */
+static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
+                                   MSIMessage *origin,
+                                   MSIMessage *translated)
+{
+    int ret = 0;
+    VTD_IR_MSIAddress addr;
+    uint16_t index;
+    VTDIrq irq = {0};
+
+    assert(origin && translated);
+
+    if (!iommu || !iommu->intr_enabled) {
+        goto do_not_translate;
+    }
+
+    if (origin->address & VTD_MSI_ADDR_HI_MASK) {
+        VTD_DPRINTF(GENERAL, "error: MSI addr high 32 bits nonzero"
+                    " during interrupt remapping: 0x%"PRIx32,
+                    (uint32_t)((origin->address & VTD_MSI_ADDR_HI_MASK) >> \
+                    VTD_MSI_ADDR_HI_SHIFT));
+        return -VTD_FR_IR_REQ_RSVD;
+    }
+
+    addr.data = origin->address & VTD_MSI_ADDR_LO_MASK;
+    if (le16_to_cpu(addr.__head) != 0xfee) {
+        VTD_DPRINTF(GENERAL, "error: MSI addr low 32 bits invalid: "
+                    "0x%"PRIx32, addr.data);
+        return -VTD_FR_IR_REQ_RSVD;
+    }
+
+    /* This is compatible mode. */
+    if (addr.int_mode != VTD_IR_INT_FORMAT_REMAP) {
+        goto do_not_translate;
+    }
+
+    index = addr.index_h << 15 | le16_to_cpu(addr.index_l);
+
+#define  VTD_IR_MSI_DATA_SUBHANDLE       (0x0000ffff)
+#define  VTD_IR_MSI_DATA_RESERVED        (0xffff0000)
+
+    if (addr.sub_valid) {
+        /* See VT-d spec 5.1.2.2 and 5.1.3 on subhandle */
+        index += origin->data & VTD_IR_MSI_DATA_SUBHANDLE;
+    }
+
+    ret = vtd_remap_irq_get(iommu, index, &irq);
+    if (ret) {
+        return ret;
+    }
+
+    if (addr.sub_valid) {
+        VTD_DPRINTF(IR, "received MSI interrupt");
+        if (origin->data & VTD_IR_MSI_DATA_RESERVED) {
+            VTD_DPRINTF(GENERAL, "error: MSI data bits non-zero for "
+                        "interrupt remappable entry: 0x%"PRIx32,
+                        origin->data);
+            return -VTD_FR_IR_REQ_RSVD;
+        }
+    } else {
+        uint8_t vector = origin->data & 0xff;
+        VTD_DPRINTF(IR, "received IOAPIC interrupt");
+        /* IOAPIC entry vector should be aligned with IRTE vector
+         * (see vt-d spec 5.1.5.1). */
+        if (vector != irq.vector) {
+            VTD_DPRINTF(GENERAL, "IOAPIC vector inconsistent: "
+                        "entry: %d, IRTE: %d, index: %d",
+                        vector, irq.vector, index);
+        }
+    }
+
+    /*
+     * We'd better keep the last two bits, assuming that guest OS
+     * might modify it. Keep it does not hurt after all.
+     */
+    irq.msi_addr_last_bits = addr.__not_care;
+
+    /* Translate VTDIrq to MSI message */
+    vtd_generate_msi_message(&irq, translated);
+
+    VTD_DPRINTF(IR, "mapping MSI 0x%"PRIx64":0x%"PRIx32 " -> "
+                "0x%"PRIx64":0x%"PRIx32, origin->address, origin->data,
+                translated->address, translated->data);
+    return 0;
+
+do_not_translate:
+    memcpy(translated, origin, sizeof(*origin));
+    return 0;
+}
+
+static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
+                                   uint64_t *data, unsigned size,
+                                   MemTxAttrs attrs)
+{
+    return MEMTX_OK;
+}
+
+static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
+                                    uint64_t value, unsigned size,
+                                    MemTxAttrs attrs)
+{
+    int ret = 0;
+    MSIMessage from = {0}, to = {0};
+
+    from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
+    from.data = (uint32_t) value;
+
+    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
+    if (ret) {
+        /* TODO: report error */
+        VTD_DPRINTF(GENERAL, "int remap fail for addr 0x%"PRIx64
+                    " data 0x%"PRIx32, from.address, from.data);
+        /* Drop this interrupt */
+        return MEMTX_ERROR;
+    }
+
+    VTD_DPRINTF(IR, "delivering MSI 0x%"PRIx64":0x%"PRIx32
+                " for device sid 0x%04x",
+                to.address, to.data, sid);
+
+    if (dma_memory_write(&address_space_memory, to.address,
+                         &to.data, size)) {
+        VTD_DPRINTF(GENERAL, "error: fail to write 0x%"PRIx64
+                    " value 0x%"PRIx32, to.address, to.data);
+    }
+
+    return MEMTX_OK;
+}
+
+static const MemoryRegionOps vtd_mem_ir_ops = {
+    .read_with_attrs = vtd_mem_ir_read,
+    .write_with_attrs = vtd_mem_ir_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
 
 VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn)
 {
@@ -2009,6 +2243,11 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn)
         vtd_dev_as->context_cache_entry.context_cache_gen = 0;
         memory_region_init_iommu(&vtd_dev_as->iommu, OBJECT(s),
                                  &s->iommu_ops, "intel_iommu", UINT64_MAX);
+        memory_region_init_io(&vtd_dev_as->iommu_ir, OBJECT(s),
+                              &vtd_mem_ir_ops, s, "intel_iommu_ir",
+                              VTD_INTERRUPT_ADDR_SIZE);
+        memory_region_add_subregion(&vtd_dev_as->iommu, VTD_INTERRUPT_ADDR_FIRST,
+                                    &vtd_dev_as->iommu_ir);
         address_space_init(&vtd_dev_as->as,
                            &vtd_dev_as->iommu, "intel_iommu");
     }
-- 
MST

[Qemu-devel] [PULL v5 22/57] intel_iommu: get rid of {0} initializers

[Michael S. Tsirkin]

Correct and portable in theory, but triggers warnings with older gcc
versions when -Wmissing-braces is enabled.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 2e57396..ccfcc69 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2024,7 +2024,7 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
 /* Fetch IRQ information of specific IR index */
 static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index, VTDIrq *irq)
 {
-    VTD_IRTE irte = { 0 };
+    VTD_IRTE irte = {};
     int ret = 0;
 
     ret = vtd_irte_get(iommu, index, &irte);
@@ -2082,7 +2082,7 @@ static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
     int ret = 0;
     VTD_IR_MSIAddress addr;
     uint16_t index;
-    VTDIrq irq = {0};
+    VTDIrq irq = {};
 
     assert(origin && translated);
 
@@ -2176,7 +2176,7 @@ static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
                                     MemTxAttrs attrs)
 {
     int ret = 0;
-    MSIMessage from = {0}, to = {0};
+    MSIMessage from = {}, to = {};
 
     from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
     from.data = (uint32_t) value;
-- 
MST

[Qemu-devel] [PULL v5 23/57] q35: ioapic: add support for emulated IOAPIC IR

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

This patch translates all IOAPIC interrupts into MSI ones. One pseudo
ioapic address space is added to transfer the MSI message. By default,
it will be system memory address space. When IR is enabled, it will be
IOMMU address space.

Currently, only emulated IOAPIC is supported.

Idea suggested by Jan Kiszka and Rita Sinha in the following patch:

https://lists.gnu.org/archive/html/qemu-devel/2016-03/msg01933.html

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/apic-msidef.h     |  1 +
 include/hw/i386/ioapic_internal.h |  1 +
 include/hw/i386/pc.h              |  4 ++++
 hw/i386/intel_iommu.c             |  6 +++++-
 hw/i386/pc.c                      |  3 +++
 hw/intc/ioapic.c                  | 28 ++++++++++++++++++++++++----
 6 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/include/hw/i386/apic-msidef.h b/include/hw/i386/apic-msidef.h
index 6e2eb71..8b4d4cc 100644
--- a/include/hw/i386/apic-msidef.h
+++ b/include/hw/i386/apic-msidef.h
@@ -25,6 +25,7 @@
 #define MSI_ADDR_REDIRECTION_SHIFT      3
 
 #define MSI_ADDR_DEST_ID_SHIFT          12
+#define MSI_ADDR_DEST_IDX_SHIFT         4
 #define  MSI_ADDR_DEST_ID_MASK          0x00ffff0
 
 #endif /* HW_APIC_MSIDEF_H */
diff --git a/include/hw/i386/ioapic_internal.h b/include/hw/i386/ioapic_internal.h
index 0542aa1..5c901ae 100644
--- a/include/hw/i386/ioapic_internal.h
+++ b/include/hw/i386/ioapic_internal.h
@@ -31,6 +31,7 @@
 #define IOAPIC_VERSION                  0x11
 
 #define IOAPIC_LVT_DEST_SHIFT           56
+#define IOAPIC_LVT_DEST_IDX_SHIFT       48
 #define IOAPIC_LVT_MASKED_SHIFT         16
 #define IOAPIC_LVT_TRIGGER_MODE_SHIFT   15
 #define IOAPIC_LVT_REMOTE_IRR_SHIFT     14
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index e38c95a..9811125 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -72,6 +72,10 @@ struct PCMachineState {
     /* NUMA information: */
     uint64_t numa_nodes;
     uint64_t *node_mem;
+
+    /* Address space used by IOAPIC device. All IOAPIC interrupts
+     * will be translated to MSI messages in the address space. */
+    AddressSpace *ioapic_as;
 };
 
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index ccfcc69..6ba5520 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -28,6 +28,7 @@
 #include "hw/i386/pc.h"
 #include "hw/boards.h"
 #include "hw/i386/x86-iommu.h"
+#include "hw/pci-host/q35.h"
 
 /*#define DEBUG_INTEL_IOMMU*/
 #ifdef DEBUG_INTEL_IOMMU
@@ -2367,7 +2368,8 @@ static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
 
 static void vtd_realize(DeviceState *dev, Error **errp)
 {
-    PCIBus *bus = PC_MACHINE(qdev_get_machine())->bus;
+    PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
+    PCIBus *bus = pcms->bus;
     IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
 
     VTD_DPRINTF(GENERAL, "");
@@ -2383,6 +2385,8 @@ static void vtd_realize(DeviceState *dev, Error **errp)
     vtd_init(s);
     sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
     pci_setup_iommu(bus, vtd_host_dma_iommu, dev);
+    /* Pseudo address space under root PCI bus. */
+    pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
 }
 
 static void vtd_class_init(ObjectClass *klass, void *data)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 719884f..979f36d 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1475,6 +1475,9 @@ void pc_memory_init(PCMachineState *pcms,
         rom_add_option(option_rom[i].name, option_rom[i].bootindex);
     }
     pcms->fw_cfg = fw_cfg;
+
+    /* Init default IOAPIC address space */
+    pcms->ioapic_as = &address_space_memory;
 }
 
 qemu_irq pc_allocate_cpu_irq(void)
diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index 273bb08..36dd42a 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -29,6 +29,8 @@
 #include "hw/i386/ioapic_internal.h"
 #include "include/hw/pci/msi.h"
 #include "sysemu/kvm.h"
+#include "target-i386/cpu.h"
+#include "hw/i386/apic-msidef.h"
 
 //#define DEBUG_IOAPIC
 
@@ -50,13 +52,15 @@ extern int ioapic_no;
 
 static void ioapic_service(IOAPICCommonState *s)
 {
+    AddressSpace *ioapic_as = PC_MACHINE(qdev_get_machine())->ioapic_as;
+    uint32_t addr, data;
     uint8_t i;
     uint8_t trig_mode;
     uint8_t vector;
     uint8_t delivery_mode;
     uint32_t mask;
     uint64_t entry;
-    uint8_t dest;
+    uint16_t dest_idx;
     uint8_t dest_mode;
 
     for (i = 0; i < IOAPIC_NUM_PINS; i++) {
@@ -67,7 +71,14 @@ static void ioapic_service(IOAPICCommonState *s)
             entry = s->ioredtbl[i];
             if (!(entry & IOAPIC_LVT_MASKED)) {
                 trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1);
-                dest = entry >> IOAPIC_LVT_DEST_SHIFT;
+                /*
+                 * By default, this would be dest_id[8] +
+                 * reserved[8]. When IR is enabled, this would be
+                 * interrupt_index[15] + interrupt_format[1]. This
+                 * field never means anything, but only used to
+                 * generate corresponding MSI.
+                 */
+                dest_idx = entry >> IOAPIC_LVT_DEST_IDX_SHIFT;
                 dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1;
                 delivery_mode =
                     (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK;
@@ -97,8 +108,17 @@ static void ioapic_service(IOAPICCommonState *s)
 #else
                 (void)coalesce;
 #endif
-                apic_deliver_irq(dest, dest_mode, delivery_mode, vector,
-                                 trig_mode);
+                /* No matter whether IR is enabled, we translate
+                 * the IOAPIC message into a MSI one, and its
+                 * address space will decide whether we need a
+                 * translation. */
+                addr = APIC_DEFAULT_ADDRESS | \
+                    (dest_idx << MSI_ADDR_DEST_IDX_SHIFT) |
+                    (dest_mode << MSI_ADDR_DEST_MODE_SHIFT);
+                data = (vector << MSI_DATA_VECTOR_SHIFT) |
+                    (trig_mode << MSI_DATA_TRIGGER_SHIFT) |
+                    (delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT);
+                stl_le_phys(ioapic_as, addr, data);
             }
         }
     }
-- 
MST

[Qemu-devel] [PULL v5 24/57] ioapic: introduce ioapic_entry_parse() helper

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Abstract IOAPIC entry parsing logic into a helper function.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/intc/ioapic.c | 110 +++++++++++++++++++++++++++----------------------------
 1 file changed, 54 insertions(+), 56 deletions(-)

diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index 36dd42a..cfc7b7b 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -50,18 +50,56 @@ static IOAPICCommonState *ioapics[MAX_IOAPICS];
 /* global variable from ioapic_common.c */
 extern int ioapic_no;
 
+struct ioapic_entry_info {
+    /* fields parsed from IOAPIC entries */
+    uint8_t masked;
+    uint8_t trig_mode;
+    uint16_t dest_idx;
+    uint8_t dest_mode;
+    uint8_t delivery_mode;
+    uint8_t vector;
+
+    /* MSI message generated from above parsed fields */
+    uint32_t addr;
+    uint32_t data;
+};
+
+static void ioapic_entry_parse(uint64_t entry, struct ioapic_entry_info *info)
+{
+    memset(info, 0, sizeof(*info));
+    info->masked = (entry >> IOAPIC_LVT_MASKED_SHIFT) & 1;
+    info->trig_mode = (entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1;
+    /*
+     * By default, this would be dest_id[8] + reserved[8]. When IR
+     * is enabled, this would be interrupt_index[15] +
+     * interrupt_format[1]. This field never means anything, but
+     * only used to generate corresponding MSI.
+     */
+    info->dest_idx = (entry >> IOAPIC_LVT_DEST_IDX_SHIFT) & 0xffff;
+    info->dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1;
+    info->delivery_mode = (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) \
+        & IOAPIC_DM_MASK;
+    if (info->delivery_mode == IOAPIC_DM_EXTINT) {
+        info->vector = pic_read_irq(isa_pic);
+    } else {
+        info->vector = entry & IOAPIC_VECTOR_MASK;
+    }
+
+    info->addr = APIC_DEFAULT_ADDRESS | \
+        (info->dest_idx << MSI_ADDR_DEST_IDX_SHIFT) | \
+        (info->dest_mode << MSI_ADDR_DEST_MODE_SHIFT);
+    info->data = (info->vector << MSI_DATA_VECTOR_SHIFT) | \
+        (info->trig_mode << MSI_DATA_TRIGGER_SHIFT) | \
+        (info->delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT);
+}
+
 static void ioapic_service(IOAPICCommonState *s)
 {
     AddressSpace *ioapic_as = PC_MACHINE(qdev_get_machine())->ioapic_as;
-    uint32_t addr, data;
+    struct ioapic_entry_info info;
     uint8_t i;
-    uint8_t trig_mode;
-    uint8_t vector;
-    uint8_t delivery_mode;
     uint32_t mask;
     uint64_t entry;
-    uint16_t dest_idx;
-    uint8_t dest_mode;
 
     for (i = 0; i < IOAPIC_NUM_PINS; i++) {
         mask = 1 << i;
@@ -69,33 +107,18 @@ static void ioapic_service(IOAPICCommonState *s)
             int coalesce = 0;
 
             entry = s->ioredtbl[i];
-            if (!(entry & IOAPIC_LVT_MASKED)) {
-                trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1);
-                /*
-                 * By default, this would be dest_id[8] +
-                 * reserved[8]. When IR is enabled, this would be
-                 * interrupt_index[15] + interrupt_format[1]. This
-                 * field never means anything, but only used to
-                 * generate corresponding MSI.
-                 */
-                dest_idx = entry >> IOAPIC_LVT_DEST_IDX_SHIFT;
-                dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1;
-                delivery_mode =
-                    (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK;
-                if (trig_mode == IOAPIC_TRIGGER_EDGE) {
+            ioapic_entry_parse(entry, &info);
+            if (!info.masked) {
+                if (info.trig_mode == IOAPIC_TRIGGER_EDGE) {
                     s->irr &= ~mask;
                 } else {
                     coalesce = s->ioredtbl[i] & IOAPIC_LVT_REMOTE_IRR;
                     s->ioredtbl[i] |= IOAPIC_LVT_REMOTE_IRR;
                 }
-                if (delivery_mode == IOAPIC_DM_EXTINT) {
-                    vector = pic_read_irq(isa_pic);
-                } else {
-                    vector = entry & IOAPIC_VECTOR_MASK;
-                }
+
 #ifdef CONFIG_KVM
                 if (kvm_irqchip_is_split()) {
-                    if (trig_mode == IOAPIC_TRIGGER_EDGE) {
+                    if (info.trig_mode == IOAPIC_TRIGGER_EDGE) {
                         kvm_set_irq(kvm_state, i, 1);
                         kvm_set_irq(kvm_state, i, 0);
                     } else {
@@ -112,13 +135,7 @@ static void ioapic_service(IOAPICCommonState *s)
                  * the IOAPIC message into a MSI one, and its
                  * address space will decide whether we need a
                  * translation. */
-                addr = APIC_DEFAULT_ADDRESS | \
-                    (dest_idx << MSI_ADDR_DEST_IDX_SHIFT) |
-                    (dest_mode << MSI_ADDR_DEST_MODE_SHIFT);
-                data = (vector << MSI_DATA_VECTOR_SHIFT) |
-                    (trig_mode << MSI_DATA_TRIGGER_SHIFT) |
-                    (delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT);
-                stl_le_phys(ioapic_as, addr, data);
+                stl_le_phys(ioapic_as, info.addr, info.data);
             }
         }
     }
@@ -169,30 +186,11 @@ static void ioapic_update_kvm_routes(IOAPICCommonState *s)
 
     if (kvm_irqchip_is_split()) {
         for (i = 0; i < IOAPIC_NUM_PINS; i++) {
-            uint64_t entry = s->ioredtbl[i];
-            uint8_t trig_mode;
-            uint8_t delivery_mode;
-            uint8_t dest;
-            uint8_t dest_mode;
-            uint64_t pin_polarity;
             MSIMessage msg;
-
-            trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1);
-            dest = entry >> IOAPIC_LVT_DEST_SHIFT;
-            dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1;
-            pin_polarity = (entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1;
-            delivery_mode =
-                (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK;
-
-            msg.address = APIC_DEFAULT_ADDRESS;
-            msg.address |= dest_mode << 2;
-            msg.address |= dest << 12;
-
-            msg.data = entry & IOAPIC_VECTOR_MASK;
-            msg.data |= delivery_mode << APIC_DELIVERY_MODE_SHIFT;
-            msg.data |= pin_polarity << APIC_POLARITY_SHIFT;
-            msg.data |= trig_mode << APIC_TRIG_MODE_SHIFT;
-
+            struct ioapic_entry_info info;
+            ioapic_entry_parse(s->ioredtbl[i], &info);
+            msg.address = info.addr;
+            msg.data = info.data;
             kvm_irqchip_update_msi_route(kvm_state, i, msg, NULL);
         }
         kvm_irqchip_commit_routes(kvm_state);
-- 
MST

[Qemu-devel] [PULL v5 25/57] intel_iommu: add support for split irqchip

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

In split irqchip mode, IOAPIC is working in user space, only update
kernel irq routes when entry changed. When IR is enabled, we directly
update the kernel with translated messages. It works just like a kernel
cache for the remapping entries.

Since KVM irqfd is using kernel gsi routes to deliver interrupts, as
long as we can support split irqchip, we will support irqfd as
well. Also, since kernel gsi routes will cache translated interrupts,
irqfd delivery will not suffer from any performance impact due to IR.

And, since we supported irqfd, vhost devices will be able to work
seamlessly with IR now. Logically this should contain both vhost-net and
vhost-user case.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[move trace-events lines into target-i386/trace-events]
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 Makefile.objs                 |  1 +
 include/hw/i386/intel_iommu.h |  1 +
 include/hw/i386/x86-iommu.h   |  5 +++++
 hw/i386/intel_iommu.c         |  7 +++++++
 target-i386/kvm.c             | 27 +++++++++++++++++++++++++++
 target-i386/trace-events      |  4 ++++
 6 files changed, 45 insertions(+)
 create mode 100644 target-i386/trace-events

diff --git a/Makefile.objs b/Makefile.objs
index 7f1f0a3..6d5ddcf 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -153,6 +153,7 @@ trace-events-y += hw/alpha/trace-events
 trace-events-y += ui/trace-events
 trace-events-y += audio/trace-events
 trace-events-y += net/trace-events
+trace-events-y += target-i386/trace-events
 trace-events-y += target-sparc/trace-events
 trace-events-y += target-s390x/trace-events
 trace-events-y += target-ppc/trace-events
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index cdbbddd..e048ced 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -26,6 +26,7 @@
 #include "hw/i386/x86-iommu.h"
 #include "hw/i386/ioapic.h"
 #include "hw/pci/msi.h"
+#include "hw/sysbus.h"
 
 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
 #define INTEL_IOMMU_DEVICE(obj) \
diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
index 699dd06..fa6ce31 100644
--- a/include/hw/i386/x86-iommu.h
+++ b/include/hw/i386/x86-iommu.h
@@ -21,6 +21,7 @@
 #define IOMMU_COMMON_H
 
 #include "hw/sysbus.h"
+#include "hw/pci/pci.h"
 
 #define  TYPE_X86_IOMMU_DEVICE  ("x86-iommu")
 #define  X86_IOMMU_DEVICE(obj) \
@@ -31,6 +32,7 @@
     OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE)
 
 #define X86_IOMMU_PCI_DEVFN_MAX           256
+#define X86_IOMMU_SID_INVALID             (0xffff)
 
 typedef struct X86IOMMUState X86IOMMUState;
 typedef struct X86IOMMUClass X86IOMMUClass;
@@ -39,6 +41,9 @@ struct X86IOMMUClass {
     SysBusDeviceClass parent;
     /* Intel/AMD specific realize() hook */
     DeviceRealize realize;
+    /* MSI-based interrupt remapping */
+    int (*int_remap)(X86IOMMUState *iommu, MSIMessage *src,
+                     MSIMessage *dst, uint16_t sid);
 };
 
 struct X86IOMMUState {
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 6ba5520..c7ded0f 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2165,6 +2165,12 @@ do_not_translate:
     return 0;
 }
 
+static int vtd_int_remap(X86IOMMUState *iommu, MSIMessage *src,
+                         MSIMessage *dst, uint16_t sid)
+{
+    return vtd_interrupt_remap_msi(INTEL_IOMMU_DEVICE(iommu), src, dst);
+}
+
 static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
                                    uint64_t *data, unsigned size,
                                    MemTxAttrs attrs)
@@ -2399,6 +2405,7 @@ static void vtd_class_init(ObjectClass *klass, void *data)
     dc->props = vtd_properties;
     dc->hotpluggable = false;
     x86_class->realize = vtd_realize;
+    x86_class->int_remap = vtd_int_remap;
 }
 
 static const TypeInfo vtd_info = {
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 9327523..9c00e48 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -35,6 +35,7 @@
 #include "hw/i386/apic.h"
 #include "hw/i386/apic_internal.h"
 #include "hw/i386/apic-msidef.h"
+#include "hw/i386/intel_iommu.h"
 
 #include "exec/ioport.h"
 #include "standard-headers/asm-x86/hyperv.h"
@@ -42,6 +43,7 @@
 #include "hw/pci/msi.h"
 #include "migration/migration.h"
 #include "exec/memattrs.h"
+#include "trace.h"
 
 //#define DEBUG_KVM
 
@@ -3371,6 +3373,31 @@ int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id)
 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
                              uint64_t address, uint32_t data, PCIDevice *dev)
 {
+    X86IOMMUState *iommu = x86_iommu_get_default();
+
+    if (iommu) {
+        int ret;
+        MSIMessage src, dst;
+        X86IOMMUClass *class = X86_IOMMU_GET_CLASS(iommu);
+
+        src.address = route->u.msi.address_hi;
+        src.address <<= VTD_MSI_ADDR_HI_SHIFT;
+        src.address |= route->u.msi.address_lo;
+        src.data = route->u.msi.data;
+
+        ret = class->int_remap(iommu, &src, &dst, dev ? \
+                               pci_requester_id(dev) : \
+                               X86_IOMMU_SID_INVALID);
+        if (ret) {
+            trace_kvm_x86_fixup_msi_error(route->gsi);
+            return 1;
+        }
+
+        route->u.msi.address_hi = dst.address >> VTD_MSI_ADDR_HI_SHIFT;
+        route->u.msi.address_lo = dst.address & VTD_MSI_ADDR_LO_MASK;
+        route->u.msi.data = dst.data;
+    }
+
     return 0;
 }
 
diff --git a/target-i386/trace-events b/target-i386/trace-events
new file mode 100644
index 0000000..2113075
--- /dev/null
+++ b/target-i386/trace-events
@@ -0,0 +1,4 @@
+# See docs/trace-events.txt for syntax documentation.
+
+# target-i386/kvm.c
+kvm_x86_fixup_msi_error(uint32_t gsi) "VT-d failed to remap interrupt for GSI %" PRIu32
-- 
MST

[Qemu-devel] [PULL v5 26/57] x86-iommu: introduce IEC notifiers

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

This patch introduces x86 IOMMU IEC (Interrupt Entry Cache)
invalidation notifier list. When vIOMMU receives IEC invalidate
request, all the registered units will be notified with specific
invalidation requests.

Intel IOMMU is the first provider that generates such a event.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h | 24 ++++++++++++++++++++----
 include/hw/i386/x86-iommu.h    | 40 ++++++++++++++++++++++++++++++++++++++++
 hw/i386/intel_iommu.c          | 36 +++++++++++++++++++++++++++++-------
 hw/i386/x86-iommu.c            | 29 +++++++++++++++++++++++++++++
 hw/i386/trace-events           |  3 +++
 5 files changed, 121 insertions(+), 11 deletions(-)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index e1a08cb..10c20fe 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -296,12 +296,28 @@ typedef enum VTDFaultReason {
 
 #define VTD_CONTEXT_CACHE_GEN_MAX       0xffffffffUL
 
+/* Interrupt Entry Cache Invalidation Descriptor: VT-d 6.5.2.7. */
+struct VTDInvDescIEC {
+    uint32_t type:4;            /* Should always be 0x4 */
+    uint32_t granularity:1;     /* If set, it's global IR invalidation */
+    uint32_t resved_1:22;
+    uint32_t index_mask:5;      /* 2^N for continuous int invalidation */
+    uint32_t index:16;          /* Start index to invalidate */
+    uint32_t reserved_2:16;
+};
+typedef struct VTDInvDescIEC VTDInvDescIEC;
+
 /* Queued Invalidation Descriptor */
-struct VTDInvDesc {
-    uint64_t lo;
-    uint64_t hi;
+union VTDInvDesc {
+    struct {
+        uint64_t lo;
+        uint64_t hi;
+    };
+    union {
+        VTDInvDescIEC iec;
+    };
 };
-typedef struct VTDInvDesc VTDInvDesc;
+typedef union VTDInvDesc VTDInvDesc;
 
 /* Masks for struct VTDInvDesc */
 #define VTD_INV_DESC_TYPE               0xf
diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
index fa6ce31..c48e8dd 100644
--- a/include/hw/i386/x86-iommu.h
+++ b/include/hw/i386/x86-iommu.h
@@ -46,9 +46,28 @@ struct X86IOMMUClass {
                      MSIMessage *dst, uint16_t sid);
 };
 
+/**
+ * iec_notify_fn - IEC (Interrupt Entry Cache) notifier hook,
+ *                 triggered when IR invalidation happens.
+ * @private: private data
+ * @global: whether this is a global IEC invalidation
+ * @index: IRTE index to invalidate (start from)
+ * @mask: invalidation mask
+ */
+typedef void (*iec_notify_fn)(void *private, bool global,
+                              uint32_t index, uint32_t mask);
+
+struct IEC_Notifier {
+    iec_notify_fn iec_notify;
+    void *private;
+    QLIST_ENTRY(IEC_Notifier) list;
+};
+typedef struct IEC_Notifier IEC_Notifier;
+
 struct X86IOMMUState {
     SysBusDevice busdev;
     bool intr_supported;        /* Whether vIOMMU supports IR */
+    QLIST_HEAD(, IEC_Notifier) iec_notifiers; /* IEC notify list */
 };
 
 /**
@@ -57,4 +76,25 @@ struct X86IOMMUState {
  */
 X86IOMMUState *x86_iommu_get_default(void);
 
+/**
+ * x86_iommu_iec_register_notifier - register IEC (Interrupt Entry
+ *                                   Cache) notifiers
+ * @iommu: IOMMU device to register
+ * @fn: IEC notifier hook function
+ * @data: notifier private data
+ */
+void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
+                                     iec_notify_fn fn, void *data);
+
+/**
+ * x86_iommu_iec_notify_all - Notify IEC invalidations
+ * @iommu: IOMMU device that sends the notification
+ * @global: whether this is a global invalidation. If true, @index
+ *          and @mask are undefined.
+ * @index: starting index of interrupt entry to invalidate
+ * @mask: index mask for the invalidation
+ */
+void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
+                              uint32_t index, uint32_t mask);
+
 #endif
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index c7ded0f..2acec85 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -904,6 +904,12 @@ static void vtd_root_table_setup(IntelIOMMUState *s)
                 (s->root_extended ? "(extended)" : ""));
 }
 
+static void vtd_iec_notify_all(IntelIOMMUState *s, bool global,
+                               uint32_t index, uint32_t mask)
+{
+    x86_iommu_iec_notify_all(X86_IOMMU_DEVICE(s), global, index, mask);
+}
+
 static void vtd_interrupt_remap_table_setup(IntelIOMMUState *s)
 {
     uint64_t value = 0;
@@ -911,7 +917,8 @@ static void vtd_interrupt_remap_table_setup(IntelIOMMUState *s)
     s->intr_size = 1UL << ((value & VTD_IRTA_SIZE_MASK) + 1);
     s->intr_root = value & VTD_IRTA_ADDR_MASK;
 
-    /* TODO: invalidate interrupt entry cache */
+    /* Notify global invalidation */
+    vtd_iec_notify_all(s, true, 0, 0);
 
     VTD_DPRINTF(CSR, "int remap table addr 0x%"PRIx64 " size %"PRIu32,
                 s->intr_root, s->intr_size);
@@ -1413,6 +1420,21 @@ static bool vtd_process_iotlb_desc(IntelIOMMUState *s, VTDInvDesc *inv_desc)
     return true;
 }
 
+static bool vtd_process_inv_iec_desc(IntelIOMMUState *s,
+                                     VTDInvDesc *inv_desc)
+{
+    VTD_DPRINTF(INV, "inv ir glob %d index %d mask %d",
+                inv_desc->iec.granularity,
+                inv_desc->iec.index,
+                inv_desc->iec.index_mask);
+
+    vtd_iec_notify_all(s, !inv_desc->iec.granularity,
+                       inv_desc->iec.index,
+                       inv_desc->iec.index_mask);
+
+    return true;
+}
+
 static bool vtd_process_inv_desc(IntelIOMMUState *s)
 {
     VTDInvDesc inv_desc;
@@ -1453,12 +1475,12 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
         break;
 
     case VTD_INV_DESC_IEC:
-        VTD_DPRINTF(INV, "Interrupt Entry Cache Invalidation "
-                    "not implemented yet");
-        /*
-         * Since currently we do not cache interrupt entries, we can
-         * just mark this descriptor as "good" and move on.
-         */
+        VTD_DPRINTF(INV, "Invalidation Interrupt Entry Cache "
+                    "Descriptor hi 0x%"PRIx64 " lo 0x%"PRIx64,
+                    inv_desc.hi, inv_desc.lo);
+        if (!vtd_process_inv_iec_desc(s, &inv_desc)) {
+            return false;
+        }
         break;
 
     default:
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 4280839..ce26b2a 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -22,6 +22,33 @@
 #include "hw/boards.h"
 #include "hw/i386/x86-iommu.h"
 #include "qemu/error-report.h"
+#include "trace.h"
+
+void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
+                                     iec_notify_fn fn, void *data)
+{
+    IEC_Notifier *notifier = g_new0(IEC_Notifier, 1);
+
+    notifier->iec_notify = fn;
+    notifier->private = data;
+
+    QLIST_INSERT_HEAD(&iommu->iec_notifiers, notifier, list);
+}
+
+void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
+                              uint32_t index, uint32_t mask)
+{
+    IEC_Notifier *notifier;
+
+    trace_x86_iommu_iec_notify(global, index, mask);
+
+    QLIST_FOREACH(notifier, &iommu->iec_notifiers, list) {
+        if (notifier->iec_notify) {
+            notifier->iec_notify(notifier->private, global,
+                                 index, mask);
+        }
+    }
+}
 
 /* Default X86 IOMMU device */
 static X86IOMMUState *x86_iommu_default = NULL;
@@ -46,7 +73,9 @@ X86IOMMUState *x86_iommu_get_default(void)
 
 static void x86_iommu_realize(DeviceState *dev, Error **errp)
 {
+    X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
     X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev);
+    QLIST_INIT(&x86_iommu->iec_notifiers);
     if (x86_class->realize) {
         x86_class->realize(dev, errp);
     }
diff --git a/hw/i386/trace-events b/hw/i386/trace-events
index ea77bc2..b4882c1 100644
--- a/hw/i386/trace-events
+++ b/hw/i386/trace-events
@@ -10,3 +10,6 @@ xen_pv_mmio_write(uint64_t addr) "WARNING: write to Xen PV Device MMIO space (ad
 # hw/i386/pc.c
 mhp_pc_dimm_assigned_slot(int slot) "0x%d"
 mhp_pc_dimm_assigned_address(uint64_t addr) "0x%"PRIx64
+
+# hw/i386/x86-iommu.c
+x86_iommu_iec_notify(bool global, uint32_t index, uint32_t mask) "Notify IEC invalidation: global=%d index=%" PRIu32 " mask=%" PRIu32
-- 
MST

Re: [Qemu-devel] [PULL v5 26/57] x86-iommu: introduce IEC notifiers

[Jan Kiszka]

[-- Attachment #1: Type: text/plain, Size: 2236 bytes --]


Sorry, only noticed this now in a discussion with David over the AMD IOMMU:

On 2016-07-21 19:53, Michael S. Tsirkin wrote:
> From: Peter Xu <peterx@redhat.com>
> 
> This patch introduces x86 IOMMU IEC (Interrupt Entry Cache)
> invalidation notifier list. When vIOMMU receives IEC invalidate
> request, all the registered units will be notified with specific
> invalidation requests.
> 
> Intel IOMMU is the first provider that generates such a event.
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>  hw/i386/intel_iommu_internal.h | 24 ++++++++++++++++++++----
>  include/hw/i386/x86-iommu.h    | 40 ++++++++++++++++++++++++++++++++++++++++
>  hw/i386/intel_iommu.c          | 36 +++++++++++++++++++++++++++++-------
>  hw/i386/x86-iommu.c            | 29 +++++++++++++++++++++++++++++
>  hw/i386/trace-events           |  3 +++
>  5 files changed, 121 insertions(+), 11 deletions(-)
> 

...

> @@ -57,4 +76,25 @@ struct X86IOMMUState {
>   */
>  X86IOMMUState *x86_iommu_get_default(void);
>  
> +/**
> + * x86_iommu_iec_register_notifier - register IEC (Interrupt Entry
> + *                                   Cache) notifiers
> + * @iommu: IOMMU device to register
> + * @fn: IEC notifier hook function
> + * @data: notifier private data
> + */
> +void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
> +                                     iec_notify_fn fn, void *data);
> +
> +/**
> + * x86_iommu_iec_notify_all - Notify IEC invalidations
> + * @iommu: IOMMU device that sends the notification
> + * @global: whether this is a global invalidation. If true, @index
> + *          and @mask are undefined.
> + * @index: starting index of interrupt entry to invalidate
> + * @mask: index mask for the invalidation

This is Intel'ish: index and mask refer to the single Intel IR table.
AMD has per-device tables.

But even for Intel: Would the index make any sense to the callbacks? KVM
uses (virtual and real) GSIs to address its routing entries, no?

I suspect we will have to redesign this once we want to make use of
non-global invalidation.

Jan



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Re: [Qemu-devel] [PULL v5 26/57] x86-iommu: introduce IEC notifiers

[Peter Xu]

On Sat, Jul 30, 2016 at 09:52:48AM +0200, Jan Kiszka wrote:

[...]

> > +/**
> > + * x86_iommu_iec_notify_all - Notify IEC invalidations
> > + * @iommu: IOMMU device that sends the notification
> > + * @global: whether this is a global invalidation. If true, @index
> > + *          and @mask are undefined.
> > + * @index: starting index of interrupt entry to invalidate
> > + * @mask: index mask for the invalidation
> 
> This is Intel'ish: index and mask refer to the single Intel IR table.
> AMD has per-device tables.

Actually I was trying to consider this before when designing about the
interface...

> 
> But even for Intel: Would the index make any sense to the callbacks? KVM
> uses (virtual and real) GSIs to address its routing entries, no?
> 
> I suspect we will have to redesign this once we want to make use of
> non-global invalidation.

IIUC here the problem is how we should manage the mapping between GSI
routes and IRTE index (or device IDs, but let's talk later about
device IDs, since we can map a device-id invalidation into several
standalone index invalidations)? Or say, who should maintain this? IEC
invalidation consumers (e.g., IRQFD logic, IOAPIC, ...), or IOMMU?

IMHO, I would prefer the consumers to maintain this, not IOMMU. So I
would prefer a raw notification interface (index, mask, device-id,
etc. rather than GSI route index), and the consumers are responsible
to translate this message for their own sake.

The reason is simple: what if we have some other components (besides
GSI routes) that will register to this notifier? Though I am not sure
whether there would be one in the future, but letting IOMMU knowing
about something like GSI route index is a little bit odd to me.

Take irqfd as an example, currently MSIRouteEntry is defined as:

    struct MSIRouteEntry {
        PCIDevice *dev;             /* Device pointer */
        int vector;                 /* MSI/MSIX vector index */
        int virq;                   /* Virtual IRQ index */
        QLIST_ENTRY(MSIRouteEntry) list;
    };

When we want to support explicit IEC invalidation, we may need an
extra field like:

        uint32_t index;             /* IRTE index */

So when MSI routes are invalidated, we can translated the raw index
information into virq by simply looking up the MSIRouteEntry list.

Regarding to AMD's device-id interface...

I see that AMD IOMMUs do not have a global IRTE index table, not sure
whether we can "define" one? E.g. IIUC AMD IOMMU IRTE will have 13
bits index for each device, so how about making a global index like:

  device-id (16 bits) + 000b (3 bits) + index_per_device (13 bits)

to form a 32 bit index. So when AMD IOMMUs got a invalidation request,
IOMMU can translate this per-device invalidation into several
invalidations for specific IRTE entries? Not sure whether this would
work.

Thanks,

-- peterx

Re: [Qemu-devel] [PULL v5 26/57] x86-iommu: introduce IEC notifiers

[Jan Kiszka]

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On 2016-07-31 05:59, Peter Xu wrote:
> On Sat, Jul 30, 2016 at 09:52:48AM +0200, Jan Kiszka wrote:
> 
> [...]
> 
>>> +/**
>>> + * x86_iommu_iec_notify_all - Notify IEC invalidations
>>> + * @iommu: IOMMU device that sends the notification
>>> + * @global: whether this is a global invalidation. If true, @index
>>> + *          and @mask are undefined.
>>> + * @index: starting index of interrupt entry to invalidate
>>> + * @mask: index mask for the invalidation
>>
>> This is Intel'ish: index and mask refer to the single Intel IR table.
>> AMD has per-device tables.
> 
> Actually I was trying to consider this before when designing about the
> interface...
> 
>>
>> But even for Intel: Would the index make any sense to the callbacks? KVM
>> uses (virtual and real) GSIs to address its routing entries, no?
>>
>> I suspect we will have to redesign this once we want to make use of
>> non-global invalidation.
> 
> IIUC here the problem is how we should manage the mapping between GSI
> routes and IRTE index (or device IDs, but let's talk later about
> device IDs, since we can map a device-id invalidation into several
> standalone index invalidations)? Or say, who should maintain this? IEC
> invalidation consumers (e.g., IRQFD logic, IOAPIC, ...), or IOMMU?
> 
> IMHO, I would prefer the consumers to maintain this, not IOMMU. So I
> would prefer a raw notification interface (index, mask, device-id,
> etc. rather than GSI route index), and the consumers are responsible
> to translate this message for their own sake.
> 
> The reason is simple: what if we have some other components (besides
> GSI routes) that will register to this notifier? Though I am not sure
> whether there would be one in the future, but letting IOMMU knowing
> about something like GSI route index is a little bit odd to me.
> 
> Take irqfd as an example, currently MSIRouteEntry is defined as:
> 
>     struct MSIRouteEntry {
>         PCIDevice *dev;             /* Device pointer */
>         int vector;                 /* MSI/MSIX vector index */
>         int virq;                   /* Virtual IRQ index */
>         QLIST_ENTRY(MSIRouteEntry) list;
>     };
> 
> When we want to support explicit IEC invalidation, we may need an
> extra field like:
> 
>         uint32_t index;             /* IRTE index */
> 
> So when MSI routes are invalidated, we can translated the raw index
> information into virq by simply looking up the MSIRouteEntry list.
> 
> Regarding to AMD's device-id interface...
> 
> I see that AMD IOMMUs do not have a global IRTE index table, not sure
> whether we can "define" one? E.g. IIUC AMD IOMMU IRTE will have 13
> bits index for each device, so how about making a global index like:
> 
>   device-id (16 bits) + 000b (3 bits) + index_per_device (13 bits)
> 
> to form a 32 bit index. So when AMD IOMMUs got a invalidation request,
> IOMMU can translate this per-device invalidation into several
> invalidations for specific IRTE entries? Not sure whether this would
> work.

Yes, there has to be a generic handle for each translation result an
IOMMU generated. This handle can be stored on the consumer side along
with the translation request. How a handle is generated should be
completely up to the IOMMU.

The consumer should receive a 32-bit (or more) opaque value with each
translation request (separate parameter) and then again on specific
invalidation. The latter case may also report a range of handles, to
make things more efficient (provided the consumer store those handles
close to each other).

Jan


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Re: [Qemu-devel] [PULL v5 26/57] x86-iommu: introduce IEC notifiers

[Peter Xu]

On Sun, Jul 31, 2016 at 02:01:26PM +0200, Jan Kiszka wrote:

[...]

> Yes, there has to be a generic handle for each translation result an
> IOMMU generated. This handle can be stored on the consumer side along
> with the translation request. How a handle is generated should be
> completely up to the IOMMU.
> 
> The consumer should receive a 32-bit (or more) opaque value with each
> translation request (separate parameter) and then again on specific
> invalidation. The latter case may also report a range of handles, to
> make things more efficient (provided the consumer store those handles
> close to each other).

Agreed. So I think masking can still survive to describe "a range of
handles" for AMD IOMMUs, as long as we are sure the masked range
covers the maximum index number of IRTE entry for specific device.

Thanks,

-- peterx

[Qemu-devel] [PULL v5 27/57] ioapic: register IOMMU IEC notifier for ioapic

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Let IOAPIC the first consumer of x86 IOMMU IEC invalidation
notifiers. This is only used for split irqchip case, when vIOMMU
receives IR invalidation requests, IOAPIC will be notified to update
kernel irq routes. For simplicity, we just update all IOAPIC routes,
even if the invalidated entries are not IOAPIC ones.

Since now we are creating IOMMUs using "-device" parameter, IOMMU
device will be created after IOAPIC.  We need to do the registration
after machine done by leveraging machine_done notifier.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/ioapic_internal.h |  2 ++
 hw/intc/ioapic.c                  | 31 +++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/include/hw/i386/ioapic_internal.h b/include/hw/i386/ioapic_internal.h
index 5c901ae..d89ea1b 100644
--- a/include/hw/i386/ioapic_internal.h
+++ b/include/hw/i386/ioapic_internal.h
@@ -25,6 +25,7 @@
 #include "hw/hw.h"
 #include "exec/memory.h"
 #include "hw/sysbus.h"
+#include "qemu/notify.h"
 
 #define MAX_IOAPICS                     1
 
@@ -107,6 +108,7 @@ struct IOAPICCommonState {
     uint8_t ioregsel;
     uint32_t irr;
     uint64_t ioredtbl[IOAPIC_NUM_PINS];
+    Notifier machine_done;
 };
 
 void ioapic_reset_common(DeviceState *dev);
diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index cfc7b7b..2d3282a 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -31,6 +31,7 @@
 #include "sysemu/kvm.h"
 #include "target-i386/cpu.h"
 #include "hw/i386/apic-msidef.h"
+#include "hw/i386/x86-iommu.h"
 
 //#define DEBUG_IOAPIC
 
@@ -198,6 +199,16 @@ static void ioapic_update_kvm_routes(IOAPICCommonState *s)
 #endif
 }
 
+#ifdef CONFIG_KVM
+static void ioapic_iec_notifier(void *private, bool global,
+                                uint32_t index, uint32_t mask)
+{
+    IOAPICCommonState *s = (IOAPICCommonState *)private;
+    /* For simplicity, we just update all the routes */
+    ioapic_update_kvm_routes(s);
+}
+#endif
+
 void ioapic_eoi_broadcast(int vector)
 {
     IOAPICCommonState *s;
@@ -354,6 +365,24 @@ static const MemoryRegionOps ioapic_io_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
+static void ioapic_machine_done_notify(Notifier *notifier, void *data)
+{
+#ifdef CONFIG_KVM
+    IOAPICCommonState *s = container_of(notifier, IOAPICCommonState,
+                                        machine_done);
+
+    if (kvm_irqchip_is_split()) {
+        X86IOMMUState *iommu = x86_iommu_get_default();
+        if (iommu) {
+            /* Register this IOAPIC with IOMMU IEC notifier, so that
+             * when there are IR invalidates, we can be notified to
+             * update kernel IR cache. */
+            x86_iommu_iec_register_notifier(iommu, ioapic_iec_notifier, s);
+        }
+    }
+#endif
+}
+
 static void ioapic_realize(DeviceState *dev, Error **errp)
 {
     IOAPICCommonState *s = IOAPIC_COMMON(dev);
@@ -364,6 +393,8 @@ static void ioapic_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_in(dev, ioapic_set_irq, IOAPIC_NUM_PINS);
 
     ioapics[ioapic_no] = s;
+    s->machine_done.notify = ioapic_machine_done_notify;
+    qemu_add_machine_init_done_notifier(&s->machine_done);
 }
 
 static void ioapic_class_init(ObjectClass *klass, void *data)
-- 
MST

[Qemu-devel] [PULL v5 28/57] intel_iommu: Add support for Extended Interrupt Mode

[Michael S. Tsirkin]

From: Jan Kiszka <jan.kiszka@siemens.com>

As neither QEMU nor KVM support more than 255 CPUs so far, this is
simple: we only need to switch the destination ID translation in
vtd_remap_irq_get if EIME is set.

Once CFI support is there, it will have to take EIM into account as
well. So far, nothing to do for this.

This patch allows to use x2APIC in split irqchip mode of KVM.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
[use le32_to_cpu() to retrieve dest_id]
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h |  2 ++
 include/hw/i386/intel_iommu.h  |  1 +
 hw/i386/intel_iommu.c          | 16 +++++++++-------
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 10c20fe..72b0114 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -176,6 +176,7 @@
 
 /* IRTA_REG */
 #define VTD_IRTA_ADDR_MASK          (VTD_HAW_MASK ^ 0xfffULL)
+#define VTD_IRTA_EIME               (1ULL << 11)
 #define VTD_IRTA_SIZE_MASK          (0xfULL)
 
 /* ECAP_REG */
@@ -184,6 +185,7 @@
 #define VTD_ECAP_QI                 (1ULL << 1)
 /* Interrupt Remapping support */
 #define VTD_ECAP_IR                 (1ULL << 3)
+#define VTD_ECAP_EIM                (1ULL << 4)
 
 /* CAP_REG */
 /* (offset >> 4) << 24 */
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index e048ced..745b4e7 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -271,6 +271,7 @@ struct IntelIOMMUState {
     bool intr_enabled;              /* Whether guest enabled IR */
     dma_addr_t intr_root;           /* Interrupt remapping table pointer */
     uint32_t intr_size;             /* Number of IR table entries */
+    bool intr_eime;                 /* Extended interrupt mode enabled */
 };
 
 /* Find the VTD Address space associated with the given bus pointer,
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 2acec85..a605b58 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -916,6 +916,7 @@ static void vtd_interrupt_remap_table_setup(IntelIOMMUState *s)
     value = vtd_get_quad_raw(s, DMAR_IRTA_REG);
     s->intr_size = 1UL << ((value & VTD_IRTA_SIZE_MASK) + 1);
     s->intr_root = value & VTD_IRTA_ADDR_MASK;
+    s->intr_eime = value & VTD_IRTA_EIME;
 
     /* Notify global invalidation */
     vtd_iec_notify_all(s, true, 0, 0);
@@ -2058,11 +2059,13 @@ static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index, VTDIrq *irq
     irq->trigger_mode = irte.trigger_mode;
     irq->vector = irte.vector;
     irq->delivery_mode = irte.delivery_mode;
-    /* Not support EIM yet: please refer to vt-d 9.10 DST bits */
+    irq->dest = le32_to_cpu(irte.dest_id);
+    if (!iommu->intr_eime) {
 #define  VTD_IR_APIC_DEST_MASK         (0xff00ULL)
 #define  VTD_IR_APIC_DEST_SHIFT        (8)
-    irq->dest = (le32_to_cpu(irte.dest_id) & VTD_IR_APIC_DEST_MASK) >> \
-        VTD_IR_APIC_DEST_SHIFT;
+        irq->dest = (irq->dest & VTD_IR_APIC_DEST_MASK) >>
+            VTD_IR_APIC_DEST_SHIFT;
+    }
     irq->dest_mode = irte.dest_mode;
     irq->redir_hint = irte.redir_hint;
 
@@ -2312,7 +2315,7 @@ static void vtd_init(IntelIOMMUState *s)
     s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
 
     if (x86_iommu->intr_supported) {
-        s->ecap |= VTD_ECAP_IR;
+        s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM;
     }
 
     vtd_reset_context_cache(s);
@@ -2366,10 +2369,9 @@ static void vtd_init(IntelIOMMUState *s)
     vtd_define_quad(s, DMAR_FRCD_REG_0_2, 0, 0, 0x8000000000000000ULL);
 
     /*
-     * Interrupt remapping registers, not support extended interrupt
-     * mode for now.
+     * Interrupt remapping registers.
      */
-    vtd_define_quad(s, DMAR_IRTA_REG, 0, 0xfffffffffffff00fULL, 0);
+    vtd_define_quad(s, DMAR_IRTA_REG, 0, 0xfffffffffffff80fULL, 0);
 }
 
 /* Should not reset address_spaces when reset because devices will still use
-- 
MST

[Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

This patch enables SID validation. Invalid interrupts will be dropped.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/intel_iommu.h | 17 +++++++++++
 hw/i386/intel_iommu.c         | 69 ++++++++++++++++++++++++++++++++++++-------
 2 files changed, 75 insertions(+), 11 deletions(-)

diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 745b4e7..2eba7ed 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -102,6 +102,23 @@ struct VTDIOTLBEntry {
     bool write_flags;
 };
 
+/* VT-d Source-ID Qualifier types */
+enum {
+    VTD_SQ_FULL = 0x00,     /* Full SID verification */
+    VTD_SQ_IGN_3 = 0x01,    /* Ignore bit 3 */
+    VTD_SQ_IGN_2_3 = 0x02,  /* Ignore bits 2 & 3 */
+    VTD_SQ_IGN_1_3 = 0x03,  /* Ignore bits 1-3 */
+    VTD_SQ_MAX,
+};
+
+/* VT-d Source Validation Types */
+enum {
+    VTD_SVT_NONE = 0x00,    /* No validation */
+    VTD_SVT_ALL = 0x01,     /* Do full validation */
+    VTD_SVT_BUS = 0x02,     /* Validate bus range */
+    VTD_SVT_MAX,
+};
+
 /* Interrupt Remapping Table Entry Definition */
 union VTD_IRTE {
     struct {
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index a605b58..5a97548 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2008,9 +2008,13 @@ static Property vtd_properties[] = {
 
 /* Read IRTE entry with specific index */
 static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
-                        VTD_IRTE *entry)
+                        VTD_IRTE *entry, uint16_t sid)
 {
+    static const uint16_t vtd_svt_mask[VTD_SQ_MAX] = \
+        {0xffff, 0xfffb, 0xfff9, 0xfff8};
     dma_addr_t addr = 0x00;
+    uint16_t mask, source_id;
+    uint8_t bus, bus_max, bus_min;
 
     addr = iommu->intr_root + index * sizeof(*entry);
     if (dma_memory_read(&address_space_memory, addr, entry,
@@ -2037,21 +2041,56 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
         return -VTD_FR_IR_IRTE_RSVD;
     }
 
-    /*
-     * TODO: Check Source-ID corresponds to SVT (Source Validation
-     * Type) bits
-     */
+    if (sid != X86_IOMMU_SID_INVALID) {
+        /* Validate IRTE SID */
+        source_id = le32_to_cpu(entry->source_id);
+        switch (entry->sid_vtype) {
+        case VTD_SVT_NONE:
+            VTD_DPRINTF(IR, "No SID validation for IRTE index %d", index);
+            break;
+
+        case VTD_SVT_ALL:
+            mask = vtd_svt_mask[entry->sid_q];
+            if ((source_id & mask) != (sid & mask)) {
+                VTD_DPRINTF(GENERAL, "SID validation for IRTE index "
+                            "%d failed (reqid 0x%04x sid 0x%04x)", index,
+                            sid, source_id);
+                return -VTD_FR_IR_SID_ERR;
+            }
+            break;
+
+        case VTD_SVT_BUS:
+            bus_max = source_id >> 8;
+            bus_min = source_id & 0xff;
+            bus = sid >> 8;
+            if (bus > bus_max || bus < bus_min) {
+                VTD_DPRINTF(GENERAL, "SID validation for IRTE index %d "
+                            "failed (bus %d outside %d-%d)", index, bus,
+                            bus_min, bus_max);
+                return -VTD_FR_IR_SID_ERR;
+            }
+            break;
+
+        default:
+            VTD_DPRINTF(GENERAL, "Invalid SVT bits (0x%x) in IRTE index "
+                        "%d", entry->sid_vtype, index);
+            /* Take this as verification failure. */
+            return -VTD_FR_IR_SID_ERR;
+            break;
+        }
+    }
 
     return 0;
 }
 
 /* Fetch IRQ information of specific IR index */
-static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index, VTDIrq *irq)
+static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index,
+                             VTDIrq *irq, uint16_t sid)
 {
     VTD_IRTE irte = {};
     int ret = 0;
 
-    ret = vtd_irte_get(iommu, index, &irte);
+    ret = vtd_irte_get(iommu, index, &irte, sid);
     if (ret) {
         return ret;
     }
@@ -2103,7 +2142,8 @@ static void vtd_generate_msi_message(VTDIrq *irq, MSIMessage *msg_out)
 /* Interrupt remapping for MSI/MSI-X entry */
 static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
                                    MSIMessage *origin,
-                                   MSIMessage *translated)
+                                   MSIMessage *translated,
+                                   uint16_t sid)
 {
     int ret = 0;
     VTD_IR_MSIAddress addr;
@@ -2146,7 +2186,7 @@ static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
         index += origin->data & VTD_IR_MSI_DATA_SUBHANDLE;
     }
 
-    ret = vtd_remap_irq_get(iommu, index, &irq);
+    ret = vtd_remap_irq_get(iommu, index, &irq, sid);
     if (ret) {
         return ret;
     }
@@ -2193,7 +2233,8 @@ do_not_translate:
 static int vtd_int_remap(X86IOMMUState *iommu, MSIMessage *src,
                          MSIMessage *dst, uint16_t sid)
 {
-    return vtd_interrupt_remap_msi(INTEL_IOMMU_DEVICE(iommu), src, dst);
+    return vtd_interrupt_remap_msi(INTEL_IOMMU_DEVICE(iommu),
+                                   src, dst, sid);
 }
 
 static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
@@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
 {
     int ret = 0;
     MSIMessage from = {}, to = {};
+    uint16_t sid = X86_IOMMU_SID_INVALID;
 
     from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
     from.data = (uint32_t) value;
 
-    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
+    if (!attrs.unspecified) {
+        /* We have explicit Source ID */
+        sid = attrs.requester_id;
+    }
+
+    ret = vtd_interrupt_remap_msi(opaque, &from, &to, sid);
     if (ret) {
         /* TODO: report error */
         VTD_DPRINTF(GENERAL, "int remap fail for addr 0x%"PRIx64
-- 
MST

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Jan Kiszka]

On 2016-07-21 19:53, Michael S. Tsirkin wrote:
> From: Peter Xu <peterx@redhat.com>
> 
> This patch enables SID validation. Invalid interrupts will be dropped.
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>  include/hw/i386/intel_iommu.h | 17 +++++++++++
>  hw/i386/intel_iommu.c         | 69 ++++++++++++++++++++++++++++++++++++-------
>  2 files changed, 75 insertions(+), 11 deletions(-)
> 
> diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
> index 745b4e7..2eba7ed 100644
> --- a/include/hw/i386/intel_iommu.h
> +++ b/include/hw/i386/intel_iommu.h
> @@ -102,6 +102,23 @@ struct VTDIOTLBEntry {
>      bool write_flags;
>  };
>  
> +/* VT-d Source-ID Qualifier types */
> +enum {
> +    VTD_SQ_FULL = 0x00,     /* Full SID verification */
> +    VTD_SQ_IGN_3 = 0x01,    /* Ignore bit 3 */
> +    VTD_SQ_IGN_2_3 = 0x02,  /* Ignore bits 2 & 3 */
> +    VTD_SQ_IGN_1_3 = 0x03,  /* Ignore bits 1-3 */
> +    VTD_SQ_MAX,
> +};
> +
> +/* VT-d Source Validation Types */
> +enum {
> +    VTD_SVT_NONE = 0x00,    /* No validation */
> +    VTD_SVT_ALL = 0x01,     /* Do full validation */
> +    VTD_SVT_BUS = 0x02,     /* Validate bus range */
> +    VTD_SVT_MAX,
> +};
> +
>  /* Interrupt Remapping Table Entry Definition */
>  union VTD_IRTE {
>      struct {
> diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
> index a605b58..5a97548 100644
> --- a/hw/i386/intel_iommu.c
> +++ b/hw/i386/intel_iommu.c
> @@ -2008,9 +2008,13 @@ static Property vtd_properties[] = {
>  
>  /* Read IRTE entry with specific index */
>  static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
> -                        VTD_IRTE *entry)
> +                        VTD_IRTE *entry, uint16_t sid)
>  {
> +    static const uint16_t vtd_svt_mask[VTD_SQ_MAX] = \
> +        {0xffff, 0xfffb, 0xfff9, 0xfff8};
>      dma_addr_t addr = 0x00;
> +    uint16_t mask, source_id;
> +    uint8_t bus, bus_max, bus_min;
>  
>      addr = iommu->intr_root + index * sizeof(*entry);
>      if (dma_memory_read(&address_space_memory, addr, entry,
> @@ -2037,21 +2041,56 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
>          return -VTD_FR_IR_IRTE_RSVD;
>      }
>  
> -    /*
> -     * TODO: Check Source-ID corresponds to SVT (Source Validation
> -     * Type) bits
> -     */
> +    if (sid != X86_IOMMU_SID_INVALID) {
> +        /* Validate IRTE SID */

So here you only do the validation unless sid is not invalid?! Why?
Specifically interesting because...

> +        source_id = le32_to_cpu(entry->source_id);
> +        switch (entry->sid_vtype) {
> +        case VTD_SVT_NONE:
> +            VTD_DPRINTF(IR, "No SID validation for IRTE index %d", index);
> +            break;
> +
> +        case VTD_SVT_ALL:
> +            mask = vtd_svt_mask[entry->sid_q];
> +            if ((source_id & mask) != (sid & mask)) {
> +                VTD_DPRINTF(GENERAL, "SID validation for IRTE index "
> +                            "%d failed (reqid 0x%04x sid 0x%04x)", index,
> +                            sid, source_id);
> +                return -VTD_FR_IR_SID_ERR;
> +            }
> +            break;
> +
> +        case VTD_SVT_BUS:
> +            bus_max = source_id >> 8;
> +            bus_min = source_id & 0xff;
> +            bus = sid >> 8;
> +            if (bus > bus_max || bus < bus_min) {
> +                VTD_DPRINTF(GENERAL, "SID validation for IRTE index %d "
> +                            "failed (bus %d outside %d-%d)", index, bus,
> +                            bus_min, bus_max);
> +                return -VTD_FR_IR_SID_ERR;
> +            }
> +            break;
> +
> +        default:
> +            VTD_DPRINTF(GENERAL, "Invalid SVT bits (0x%x) in IRTE index "
> +                        "%d", entry->sid_vtype, index);
> +            /* Take this as verification failure. */
> +            return -VTD_FR_IR_SID_ERR;
> +            break;
> +        }
> +    }
>  
>      return 0;
>  }
>  
>  /* Fetch IRQ information of specific IR index */
> -static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index, VTDIrq *irq)
> +static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index,
> +                             VTDIrq *irq, uint16_t sid)
>  {
>      VTD_IRTE irte = {};
>      int ret = 0;
>  
> -    ret = vtd_irte_get(iommu, index, &irte);
> +    ret = vtd_irte_get(iommu, index, &irte, sid);
>      if (ret) {
>          return ret;
>      }
> @@ -2103,7 +2142,8 @@ static void vtd_generate_msi_message(VTDIrq *irq, MSIMessage *msg_out)
>  /* Interrupt remapping for MSI/MSI-X entry */
>  static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
>                                     MSIMessage *origin,
> -                                   MSIMessage *translated)
> +                                   MSIMessage *translated,
> +                                   uint16_t sid)
>  {
>      int ret = 0;
>      VTD_IR_MSIAddress addr;
> @@ -2146,7 +2186,7 @@ static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
>          index += origin->data & VTD_IR_MSI_DATA_SUBHANDLE;
>      }
>  
> -    ret = vtd_remap_irq_get(iommu, index, &irq);
> +    ret = vtd_remap_irq_get(iommu, index, &irq, sid);
>      if (ret) {
>          return ret;
>      }
> @@ -2193,7 +2233,8 @@ do_not_translate:
>  static int vtd_int_remap(X86IOMMUState *iommu, MSIMessage *src,
>                           MSIMessage *dst, uint16_t sid)
>  {
> -    return vtd_interrupt_remap_msi(INTEL_IOMMU_DEVICE(iommu), src, dst);
> +    return vtd_interrupt_remap_msi(INTEL_IOMMU_DEVICE(iommu),
> +                                   src, dst, sid);
>  }
>  
>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
> @@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
>  {
>      int ret = 0;
>      MSIMessage from = {}, to = {};
> +    uint16_t sid = X86_IOMMU_SID_INVALID;
>  
>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
>      from.data = (uint32_t) value;
>  
> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
> +    if (!attrs.unspecified) {
> +        /* We have explicit Source ID */
> +        sid = attrs.requester_id;
> +    }

...here you fall back to X86_IOMMU_SID_INVALID if writer to this region
has not provided some valid attrs. That is questionable, defeats
validation of the IOAPIC e.g. (and you can see lots of
X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).

The credits also go to David who noticed that he still doesn't get a
proper ID from the IOAPIC while implementing AMD IR. Looks like we need
to enlighten the IOAPIC MSI writes...

Jan

> +
> +    ret = vtd_interrupt_remap_msi(opaque, &from, &to, sid);
>      if (ret) {
>          /* TODO: report error */
>          VTD_DPRINTF(GENERAL, "int remap fail for addr 0x%"PRIx64
> 

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Peter Xu]

On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:

[...]

> >  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
> > @@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
> >  {
> >      int ret = 0;
> >      MSIMessage from = {}, to = {};
> > +    uint16_t sid = X86_IOMMU_SID_INVALID;
> >  
> >      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
> >      from.data = (uint32_t) value;
> >  
> > -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
> > +    if (!attrs.unspecified) {
> > +        /* We have explicit Source ID */
> > +        sid = attrs.requester_id;
> > +    }
> 
> ...here you fall back to X86_IOMMU_SID_INVALID if writer to this region
> has not provided some valid attrs. That is questionable, defeats
> validation of the IOAPIC e.g. (and you can see lots of
> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
> 
> The credits also go to David who noticed that he still doesn't get a
> proper ID from the IOAPIC while implementing AMD IR. Looks like we need
> to enlighten the IOAPIC MSI writes...

Jan, David,

At the time when drafting the patch, I skipped SID verification for
IOAPIC interrupts since it differs from generic PCI devices (no
natural requester ID, so need some hacky lines to enable it).

I can try to cook another seperate patch to enable it (for 2.8
possibly?). Thanks for pointing out this issue.

-- peterx

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Jan Kiszka]

On 2016-08-02 10:36, Peter Xu wrote:
> On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:
> 
> [...]
> 
>>>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
>>> @@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
>>>  {
>>>      int ret = 0;
>>>      MSIMessage from = {}, to = {};
>>> +    uint16_t sid = X86_IOMMU_SID_INVALID;
>>>  
>>>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
>>>      from.data = (uint32_t) value;
>>>  
>>> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
>>> +    if (!attrs.unspecified) {
>>> +        /* We have explicit Source ID */
>>> +        sid = attrs.requester_id;
>>> +    }
>>
>> ...here you fall back to X86_IOMMU_SID_INVALID if writer to this region
>> has not provided some valid attrs. That is questionable, defeats
>> validation of the IOAPIC e.g. (and you can see lots of
>> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
>>
>> The credits also go to David who noticed that he still doesn't get a
>> proper ID from the IOAPIC while implementing AMD IR. Looks like we need
>> to enlighten the IOAPIC MSI writes...
> 
> Jan, David,
> 
> At the time when drafting the patch, I skipped SID verification for
> IOAPIC interrupts since it differs from generic PCI devices (no
> natural requester ID, so need some hacky lines to enable it).

It's not hacky at all if done properly. For Intel it is simply
(Q35_PSEUDO_BUS_PLATFORM << 8) | Q35_PSEUDO_DEVFN_IOAPIC, but it will be
0x00a0 (as constant as well) for AMD. So we need some interface to tell
those parameters to the IOMMU. Keep in mind that we will need a similar
interface for other platform devices, e.g. the HPET.

> 
> I can try to cook another seperate patch to enable it (for 2.8
> possibly?). Thanks for pointing out this issue.

David needs that IOAPIC ID as well in order to finish interrupt
remapping on AMD. Please synchronize with him who will implement what.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Jan Kiszka]

[always keep the list in CC]

On 2016-08-02 10:54, David Kiarie wrote:
> 
> 
> On Tue, Aug 2, 2016 at 11:46 AM, Jan Kiszka <jan.kiszka@siemens.com
> <mailto:jan.kiszka@siemens.com>> wrote:
> 
>     On 2016-08-02 10:36, Peter Xu wrote:
>     > On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:
>     >
>     > [...]
>     >
>     >>>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
>     >>> @@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void
>     *opaque, hwaddr addr,
>     >>>  {
>     >>>      int ret = 0;
>     >>>      MSIMessage from = {}, to = {};
>     >>> +    uint16_t sid = X86_IOMMU_SID_INVALID;
>     >>>
>     >>>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
>     >>>      from.data = (uint32_t) value;
>     >>>
>     >>> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
>     >>> +    if (!attrs.unspecified) {
>     >>> +        /* We have explicit Source ID */
>     >>> +        sid = attrs.requester_id;
>     >>> +    }
>     >>
>     >> ...here you fall back to X86_IOMMU_SID_INVALID if writer to this
>     region
>     >> has not provided some valid attrs. That is questionable, defeats
>     >> validation of the IOAPIC e.g. (and you can see lots of
>     >> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
>     >>
>     >> The credits also go to David who noticed that he still doesn't get a
>     >> proper ID from the IOAPIC while implementing AMD IR. Looks like
>     we need
>     >> to enlighten the IOAPIC MSI writes...
>     >
>     > Jan, David,
>     >
>     > At the time when drafting the patch, I skipped SID verification for
>     > IOAPIC interrupts since it differs from generic PCI devices (no
>     > natural requester ID, so need some hacky lines to enable it).
> 
>     It's not hacky at all if done properly. For Intel it is simply
>     (Q35_PSEUDO_BUS_PLATFORM << 8) | Q35_PSEUDO_DEVFN_IOAPIC, but it will be
>     0x00a0 (as constant as well) for AMD. So we need some interface to tell
>     those parameters to the IOMMU. Keep in mind that we will need a similar
>     interface for other platform devices, e.g. the HPET.
> 
> 
> In my case IOMMU knows about these parameters but IOAPIC makes interrupt
> requests with a different ID. I thought we should make IOAPIC (and other
> platform devices) make requests using specified IDs.
>  

In fact, intel_iommu knows them as well: The write request comes in via
a well-known address space, the one handed out to the IOMMU. Some for
other platform devices. Associating the ID on write with the requester
would basically mean using the pattern we had in the old iommu code
prior to the introduction of MemTxAttrs. Not sure, though, what is
cleaner here.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Peter Xu]

On Tue, Aug 02, 2016 at 10:46:13AM +0200, Jan Kiszka wrote:
> On 2016-08-02 10:36, Peter Xu wrote:
> > On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:
> > 
> > [...]
> > 
> >>>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
> >>> @@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr,
> >>>  {
> >>>      int ret = 0;
> >>>      MSIMessage from = {}, to = {};
> >>> +    uint16_t sid = X86_IOMMU_SID_INVALID;
> >>>  
> >>>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
> >>>      from.data = (uint32_t) value;
> >>>  
> >>> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
> >>> +    if (!attrs.unspecified) {
> >>> +        /* We have explicit Source ID */
> >>> +        sid = attrs.requester_id;
> >>> +    }
> >>
> >> ...here you fall back to X86_IOMMU_SID_INVALID if writer to this region
> >> has not provided some valid attrs. That is questionable, defeats
> >> validation of the IOAPIC e.g. (and you can see lots of
> >> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
> >>
> >> The credits also go to David who noticed that he still doesn't get a
> >> proper ID from the IOAPIC while implementing AMD IR. Looks like we need
> >> to enlighten the IOAPIC MSI writes...
> > 
> > Jan, David,
> > 
> > At the time when drafting the patch, I skipped SID verification for
> > IOAPIC interrupts since it differs from generic PCI devices (no
> > natural requester ID, so need some hacky lines to enable it).
> 
> It's not hacky at all if done properly. For Intel it is simply
> (Q35_PSEUDO_BUS_PLATFORM << 8) | Q35_PSEUDO_DEVFN_IOAPIC, but it will be
> 0x00a0 (as constant as well) for AMD. So we need some interface to tell
> those parameters to the IOMMU. Keep in mind that we will need a similar
> interface for other platform devices, e.g. the HPET.

Okay.

> 
> > 
> > I can try to cook another seperate patch to enable it (for 2.8
> > possibly?). Thanks for pointing out this issue.
> 
> David needs that IOAPIC ID as well in order to finish interrupt
> remapping on AMD. Please synchronize with him who will implement what.

Sure. David, so do you like to do it or I cook this patch? :)

Thanks,

-- peterx

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[David Kiarie]

On Tue, Aug 2, 2016 at 1:28 PM, Peter Xu <peterx@redhat.com> wrote:

> On Tue, Aug 02, 2016 at 10:46:13AM +0200, Jan Kiszka wrote:
> > On 2016-08-02 10:36, Peter Xu wrote:
> > > On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:
> > >
> > > [...]
> > >
> > >>>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
> > >>> @@ -2209,11 +2250,17 @@ static MemTxResult vtd_mem_ir_write(void
> *opaque, hwaddr addr,
> > >>>  {
> > >>>      int ret = 0;
> > >>>      MSIMessage from = {}, to = {};
> > >>> +    uint16_t sid = X86_IOMMU_SID_INVALID;
> > >>>
> > >>>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
> > >>>      from.data = (uint32_t) value;
> > >>>
> > >>> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
> > >>> +    if (!attrs.unspecified) {
> > >>> +        /* We have explicit Source ID */
> > >>> +        sid = attrs.requester_id;
> > >>> +    }
> > >>
> > >> ...here you fall back to X86_IOMMU_SID_INVALID if writer to this
> region
> > >> has not provided some valid attrs. That is questionable, defeats
> > >> validation of the IOAPIC e.g. (and you can see lots of
> > >> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
> > >>
> > >> The credits also go to David who noticed that he still doesn't get a
> > >> proper ID from the IOAPIC while implementing AMD IR. Looks like we
> need
> > >> to enlighten the IOAPIC MSI writes...
> > >
> > > Jan, David,
> > >
> > > At the time when drafting the patch, I skipped SID verification for
> > > IOAPIC interrupts since it differs from generic PCI devices (no
> > > natural requester ID, so need some hacky lines to enable it).
> >
> > It's not hacky at all if done properly. For Intel it is simply
> > (Q35_PSEUDO_BUS_PLATFORM << 8) | Q35_PSEUDO_DEVFN_IOAPIC, but it will be
> > 0x00a0 (as constant as well) for AMD. So we need some interface to tell
> > those parameters to the IOMMU. Keep in mind that we will need a similar
> > interface for other platform devices, e.g. the HPET.
>
> Okay.
>
> >
> > >
> > > I can try to cook another seperate patch to enable it (for 2.8
> > > possibly?). Thanks for pointing out this issue.
> >
> > David needs that IOAPIC ID as well in order to finish interrupt
> > remapping on AMD. Please synchronize with him who will implement what.
>
> Sure. David, so do you like to do it or I cook this patch? :)


If there are no objections I will look at this employing Jan's approach:
associating a write with an address space.


>


> Thanks,
>
> -- peterx
>

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Peter Xu]

On Tue, Aug 02, 2016 at 02:58:55PM +0300, David Kiarie wrote:
> > Sure. David, so do you like to do it or I cook this patch? :)
> 
> If there are no objections I will look at this employing Jan's approach:
> associating a write with an address space.

Do you mean to translate current stl_le_phys() into something like
address_space_stl_le(), with MemTxAttrs? (in ioapic_service())

Also, IIUC we also need to tweak a little bit more for split irqchip
case in kvm_arch_fixup_msi_route(). Actually for this one, I think
maybe we can assume the requester ID be IOAPIC's when dev == NULL,
since HPET should not be using kernel irqchip, right?

Thanks,

-- peterx

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[David Kiarie]

On Tue, Aug 2, 2016 at 3:12 PM, Peter Xu <peterx@redhat.com> wrote:

> On Tue, Aug 02, 2016 at 02:58:55PM +0300, David Kiarie wrote:
> > > Sure. David, so do you like to do it or I cook this patch? :)
> >
> > If there are no objections I will look at this employing Jan's approach:
> > associating a write with an address space.
>
> Do you mean to translate current stl_le_phys() into something like
> address_space_stl_le(), with MemTxAttrs? (in ioapic_service())
>

I tried doing something like that but the write gets discarded somewhere. I
don't see the write from IOMMU side.

>
> Also, IIUC we also need to tweak a little bit more for split irqchip
> case in kvm_arch_fixup_msi_route(). Actually for this one, I think
> maybe we can assume the requester ID be IOAPIC's when dev == NULL,
> since HPET should not be using kernel irqchip, right?
>

I meant do have something like what is here
http://git.kiszka.org/?p=qemu.git;a=commitdiff;h=4f27331e7769a571c7d7fb61cf75e1b2fe908f85



> Thanks,
>
> -- peterx
>

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Jan Kiszka]

On 2016-08-02 14:17, David Kiarie wrote:
> 
> 
> On Tue, Aug 2, 2016 at 3:12 PM, Peter Xu <peterx@redhat.com
> <mailto:peterx@redhat.com>> wrote:
> 
>     On Tue, Aug 02, 2016 at 02:58:55PM +0300, David Kiarie wrote:
>     > > Sure. David, so do you like to do it or I cook this patch? :)
>     >
>     > If there are no objections I will look at this employing Jan's approach:
>     > associating a write with an address space.
> 
>     Do you mean to translate current stl_le_phys() into something like
>     address_space_stl_le(), with MemTxAttrs? (in ioapic_service())
> 
> 
> I tried doing something like that but the write gets discarded
> somewhere. I don't see the write from IOMMU side. 
> 
> 
>     Also, IIUC we also need to tweak a little bit more for split irqchip
>     case in kvm_arch_fixup_msi_route(). Actually for this one, I think
>     maybe we can assume the requester ID be IOAPIC's when dev == NULL,
>     since HPET should not be using kernel irqchip, right?
> 
> 
> I meant do have something like what is here
> http://git.kiszka.org/?p=qemu.git;a=commitdiff;h=4f27331e7769a571c7d7fb61cf75e1b2fe908f85 
> 

This didn't take irq routes into account that start with in-kernel
devices. Peter is right, there is more than just patching the MSI write
handlers in the IOMMUs.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Peter Xu]

On Tue, Aug 02, 2016 at 03:17:20PM +0300, David Kiarie wrote:
> On Tue, Aug 2, 2016 at 3:12 PM, Peter Xu <peterx@redhat.com> wrote:
> 
> > On Tue, Aug 02, 2016 at 02:58:55PM +0300, David Kiarie wrote:
> > > > Sure. David, so do you like to do it or I cook this patch? :)
> > >
> > > If there are no objections I will look at this employing Jan's approach:
> > > associating a write with an address space.
> >
> > Do you mean to translate current stl_le_phys() into something like
> > address_space_stl_le(), with MemTxAttrs? (in ioapic_service())
> >
> 
> I tried doing something like that but the write gets discarded somewhere. I
> don't see the write from IOMMU side.

Hi, Jan, David,

Sorry to respond late, but what's the version of your guest kernel? I
suspect there is bug in guest IOMMU codes with IR on EOI handling, and
maybe you can try to boost IOAPIC version to 0x20 when with old
kernels using "-global ioapic.version=0x20".

Thanks,

-- peterx

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[David Kiarie]

On Mon, Aug 8, 2016 at 12:06 PM, Peter Xu <peterx@redhat.com> wrote:

> On Tue, Aug 02, 2016 at 03:17:20PM +0300, David Kiarie wrote:
> > On Tue, Aug 2, 2016 at 3:12 PM, Peter Xu <peterx@redhat.com> wrote:
> >
> > > On Tue, Aug 02, 2016 at 02:58:55PM +0300, David Kiarie wrote:
> > > > > Sure. David, so do you like to do it or I cook this patch? :)
> > > >
> > > > If there are no objections I will look at this employing Jan's
> approach:
> > > > associating a write with an address space.
> > >
> > > Do you mean to translate current stl_le_phys() into something like
> > > address_space_stl_le(), with MemTxAttrs? (in ioapic_service())
> > >
> >
> > I tried doing something like that but the write gets discarded
> somewhere. I
> > don't see the write from IOMMU side.
>
> Hi, Jan, David,
>
> Sorry to respond late, but what's the version of your guest kernel? I
> suspect there is bug in guest IOMMU codes with IR on EOI handling, and
> maybe you can try to boost IOAPIC version to 0x20 when with old
> kernels using "-global ioapic.version=0x20".
>

I'm using mainline 4.7 kernel. I haven't experience any issue yet.


>
> Thanks,
>
> -- peterx
>

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[Jan Kiszka]

On 2016-08-02 13:58, David Kiarie wrote:
> 
> 
> On Tue, Aug 2, 2016 at 1:28 PM, Peter Xu <peterx@redhat.com
> <mailto:peterx@redhat.com>> wrote:
> 
>     On Tue, Aug 02, 2016 at 10:46:13AM +0200, Jan Kiszka wrote:
>     > On 2016-08-02 10:36, Peter Xu wrote:
>     > > On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:
>     > >
>     > > [...]
>     > >
>     > >>>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
>     > >>> @@ -2209,11 +2250,17 @@ static MemTxResult
>     vtd_mem_ir_write(void *opaque, hwaddr addr,
>     > >>>  {
>     > >>>      int ret = 0;
>     > >>>      MSIMessage from = {}, to = {};
>     > >>> +    uint16_t sid = X86_IOMMU_SID_INVALID;
>     > >>>
>     > >>>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
>     > >>>      from.data = (uint32_t) value;
>     > >>>
>     > >>> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
>     > >>> +    if (!attrs.unspecified) {
>     > >>> +        /* We have explicit Source ID */
>     > >>> +        sid = attrs.requester_id;
>     > >>> +    }
>     > >>
>     > >> ...here you fall back to X86_IOMMU_SID_INVALID if writer to
>     this region
>     > >> has not provided some valid attrs. That is questionable, defeats
>     > >> validation of the IOAPIC e.g. (and you can see lots of
>     > >> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
>     > >>
>     > >> The credits also go to David who noticed that he still doesn't
>     get a
>     > >> proper ID from the IOAPIC while implementing AMD IR. Looks like
>     we need
>     > >> to enlighten the IOAPIC MSI writes...
>     > >
>     > > Jan, David,
>     > >
>     > > At the time when drafting the patch, I skipped SID verification for
>     > > IOAPIC interrupts since it differs from generic PCI devices (no
>     > > natural requester ID, so need some hacky lines to enable it).
>     >
>     > It's not hacky at all if done properly. For Intel it is simply
>     > (Q35_PSEUDO_BUS_PLATFORM << 8) | Q35_PSEUDO_DEVFN_IOAPIC, but it
>     will be
>     > 0x00a0 (as constant as well) for AMD. So we need some interface to
>     tell
>     > those parameters to the IOMMU. Keep in mind that we will need a
>     similar
>     > interface for other platform devices, e.g. the HPET.
> 
>     Okay.
> 
>     >
>     > >
>     > > I can try to cook another seperate patch to enable it (for 2.8
>     > > possibly?). Thanks for pointing out this issue.
>     >
>     > David needs that IOAPIC ID as well in order to finish interrupt
>     > remapping on AMD. Please synchronize with him who will implement what.
> 
>     Sure. David, so do you like to do it or I cook this patch? :)
> 
> 
> If there are no objections I will look at this employing Jan's approach:
> associating a write with an address space.
>  

That actually means making it an IOMMU-local thing (if write_requester
== invalid -> derive ID from addressed memory region, probably via the
opaque passed to the ops). In that case, everyone could do this on himself.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

Re: [Qemu-devel] [PULL v5 29/57] intel_iommu: add SID validation for IR

[David Kiarie]

On Tue, Aug 2, 2016 at 3:16 PM, Jan Kiszka <jan.kiszka@siemens.com> wrote:

> On 2016-08-02 13:58, David Kiarie wrote:
> >
> >
> > On Tue, Aug 2, 2016 at 1:28 PM, Peter Xu <peterx@redhat.com
> > <mailto:peterx@redhat.com>> wrote:
> >
> >     On Tue, Aug 02, 2016 at 10:46:13AM +0200, Jan Kiszka wrote:
> >     > On 2016-08-02 10:36, Peter Xu wrote:
> >     > > On Mon, Aug 01, 2016 at 06:39:05PM +0200, Jan Kiszka wrote:
> >     > >
> >     > > [...]
> >     > >
> >     > >>>  static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr,
> >     > >>> @@ -2209,11 +2250,17 @@ static MemTxResult
> >     vtd_mem_ir_write(void *opaque, hwaddr addr,
> >     > >>>  {
> >     > >>>      int ret = 0;
> >     > >>>      MSIMessage from = {}, to = {};
> >     > >>> +    uint16_t sid = X86_IOMMU_SID_INVALID;
> >     > >>>
> >     > >>>      from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST;
> >     > >>>      from.data = (uint32_t) value;
> >     > >>>
> >     > >>> -    ret = vtd_interrupt_remap_msi(opaque, &from, &to);
> >     > >>> +    if (!attrs.unspecified) {
> >     > >>> +        /* We have explicit Source ID */
> >     > >>> +        sid = attrs.requester_id;
> >     > >>> +    }
> >     > >>
> >     > >> ...here you fall back to X86_IOMMU_SID_INVALID if writer to
> >     this region
> >     > >> has not provided some valid attrs. That is questionable, defeats
> >     > >> validation of the IOAPIC e.g. (and you can see lots of
> >     > >> X86_IOMMU_SID_INVALID in vtd_irte_get when booting a guest).
> >     > >>
> >     > >> The credits also go to David who noticed that he still doesn't
> >     get a
> >     > >> proper ID from the IOAPIC while implementing AMD IR. Looks like
> >     we need
> >     > >> to enlighten the IOAPIC MSI writes...
> >     > >
> >     > > Jan, David,
> >     > >
> >     > > At the time when drafting the patch, I skipped SID verification
> for
> >     > > IOAPIC interrupts since it differs from generic PCI devices (no
> >     > > natural requester ID, so need some hacky lines to enable it).
> >     >
> >     > It's not hacky at all if done properly. For Intel it is simply
> >     > (Q35_PSEUDO_BUS_PLATFORM << 8) | Q35_PSEUDO_DEVFN_IOAPIC, but it
> >     will be
> >     > 0x00a0 (as constant as well) for AMD. So we need some interface to
> >     tell
> >     > those parameters to the IOMMU. Keep in mind that we will need a
> >     similar
> >     > interface for other platform devices, e.g. the HPET.
> >
> >     Okay.
> >
> >     >
> >     > >
> >     > > I can try to cook another seperate patch to enable it (for 2.8
> >     > > possibly?). Thanks for pointing out this issue.
> >     >
> >     > David needs that IOAPIC ID as well in order to finish interrupt
> >     > remapping on AMD. Please synchronize with him who will implement
> what.
> >
> >     Sure. David, so do you like to do it or I cook this patch? :)
> >
> >
> > If there are no objections I will look at this employing Jan's approach:
> > associating a write with an address space.
> >
>
> That actually means making it an IOMMU-local thing (if write_requester
> == invalid -> derive ID from addressed memory region, probably via the
> opaque passed to the ops). In that case, everyone could do this on himself.
>

Yes, each person can actually do their part without affecting the other ;-)


>
> Jan
>
> --
> Siemens AG, Corporate Technology, CT RDA ITP SES-DE
> Corporate Competence Center Embedded Linux
>

[Qemu-devel] [PULL v5 30/57] kvm-irqchip: simplify kvm_irqchip_add_msi_route

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Changing the original MSIMessage parameter in kvm_irqchip_add_msi_route
into the vector number. Vector index provides more information than the
MSIMessage, we can retrieve the MSIMessage using the vector easily. This
will avoid fetching MSIMessage every time before adding MSI routes.

Meanwhile, the vector info will be used in the coming patches to further
enable gsi route update notifications.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/sysemu/kvm.h     | 13 ++++++++++++-
 hw/i386/kvm/pci-assign.c |  8 ++------
 hw/misc/ivshmem.c        |  3 +--
 hw/vfio/pci.c            | 11 +++++------
 hw/virtio/virtio-pci.c   |  9 +++------
 kvm-all.c                | 18 ++++++++++++++++--
 kvm-stub.c               |  2 +-
 target-i386/kvm.c        |  3 +--
 8 files changed, 41 insertions(+), 26 deletions(-)

diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index ad6f837..e5d90bd 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -474,7 +474,18 @@ static inline void cpu_synchronize_post_init(CPUState *cpu)
     }
 }
 
-int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev);
+/**
+ * kvm_irqchip_add_msi_route - Add MSI route for specific vector
+ * @s:      KVM state
+ * @vector: which vector to add. This can be either MSI/MSIX
+ *          vector. The function will automatically detect whether
+ *          MSI/MSIX is enabled, and fetch corresponding MSI
+ *          message.
+ * @dev:    Owner PCI device to add the route. If @dev is specified
+ *          as @NULL, an empty MSI message will be inited.
+ * @return: virq (>=0) when success, errno (<0) when failed.
+ */
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev);
 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
                                  PCIDevice *dev);
 void kvm_irqchip_release_virq(KVMState *s, int virq);
diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index 1a429e5..334dfc4 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -974,10 +974,9 @@ static void assigned_dev_update_msi(PCIDevice *pci_dev)
     }
 
     if (ctrl_byte & PCI_MSI_FLAGS_ENABLE) {
-        MSIMessage msg = msi_get_message(pci_dev, 0);
         int virq;
 
-        virq = kvm_irqchip_add_msi_route(kvm_state, msg, pci_dev);
+        virq = kvm_irqchip_add_msi_route(kvm_state, 0, pci_dev);
         if (virq < 0) {
             perror("assigned_dev_update_msi: kvm_irqchip_add_msi_route");
             return;
@@ -1042,7 +1041,6 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
     uint16_t entries_nr = 0;
     int i, r = 0;
     MSIXTableEntry *entry = adev->msix_table;
-    MSIMessage msg;
 
     /* Get the usable entry number for allocating */
     for (i = 0; i < adev->msix_max; i++, entry++) {
@@ -1079,9 +1077,7 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
             continue;
         }
 
-        msg.address = entry->addr_lo | ((uint64_t)entry->addr_hi << 32);
-        msg.data = entry->data;
-        r = kvm_irqchip_add_msi_route(kvm_state, msg, pci_dev);
+        r = kvm_irqchip_add_msi_route(kvm_state, i, pci_dev);
         if (r < 0) {
             return r;
         }
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 7e7c843..023da84 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -441,13 +441,12 @@ static void ivshmem_add_kvm_msi_virq(IVShmemState *s, int vector,
                                      Error **errp)
 {
     PCIDevice *pdev = PCI_DEVICE(s);
-    MSIMessage msg = msix_get_message(pdev, vector);
     int ret;
 
     IVSHMEM_DPRINTF("ivshmem_add_kvm_msi_virq vector:%d\n", vector);
     assert(!s->msi_vectors[vector].pdev);
 
-    ret = kvm_irqchip_add_msi_route(kvm_state, msg, pdev);
+    ret = kvm_irqchip_add_msi_route(kvm_state, vector, pdev);
     if (ret < 0) {
         error_setg(errp, "kvm_irqchip_add_msi_route failed");
         return;
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index c8436a1..87a6f05 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -417,11 +417,11 @@ static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix)
 }
 
 static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector,
-                                  MSIMessage *msg, bool msix)
+                                  int vector_n, bool msix)
 {
     int virq;
 
-    if ((msix && vdev->no_kvm_msix) || (!msix && vdev->no_kvm_msi) || !msg) {
+    if ((msix && vdev->no_kvm_msix) || (!msix && vdev->no_kvm_msi)) {
         return;
     }
 
@@ -429,7 +429,7 @@ static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector,
         return;
     }
 
-    virq = kvm_irqchip_add_msi_route(kvm_state, *msg, &vdev->pdev);
+    virq = kvm_irqchip_add_msi_route(kvm_state, vector_n, &vdev->pdev);
     if (virq < 0) {
         event_notifier_cleanup(&vector->kvm_interrupt);
         return;
@@ -495,7 +495,7 @@ static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
             vfio_update_kvm_msi_virq(vector, *msg, pdev);
         }
     } else {
-        vfio_add_kvm_msi_virq(vdev, vector, msg, true);
+        vfio_add_kvm_msi_virq(vdev, vector, nr, true);
     }
 
     /*
@@ -639,7 +639,6 @@ retry:
 
     for (i = 0; i < vdev->nr_vectors; i++) {
         VFIOMSIVector *vector = &vdev->msi_vectors[i];
-        MSIMessage msg = msi_get_message(&vdev->pdev, i);
 
         vector->vdev = vdev;
         vector->virq = -1;
@@ -656,7 +655,7 @@ retry:
          * Attempt to enable route through KVM irqchip,
          * default to userspace handling if unavailable.
          */
-        vfio_add_kvm_msi_virq(vdev, vector, &msg, false);
+        vfio_add_kvm_msi_virq(vdev, vector, i, false);
     }
 
     /* Set interrupt type prior to possible interrupts */
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 2b34b43..cbdfd59 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -699,14 +699,13 @@ static uint32_t virtio_read_config(PCIDevice *pci_dev,
 
 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
                                         unsigned int queue_no,
-                                        unsigned int vector,
-                                        MSIMessage msg)
+                                        unsigned int vector)
 {
     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
     int ret;
 
     if (irqfd->users == 0) {
-        ret = kvm_irqchip_add_msi_route(kvm_state, msg, &proxy->pci_dev);
+        ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
         if (ret < 0) {
             return ret;
         }
@@ -757,7 +756,6 @@ static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
     unsigned int vector;
     int ret, queue_no;
-    MSIMessage msg;
 
     for (queue_no = 0; queue_no < nvqs; queue_no++) {
         if (!virtio_queue_get_num(vdev, queue_no)) {
@@ -767,8 +765,7 @@ static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
         if (vector >= msix_nr_vectors_allocated(dev)) {
             continue;
         }
-        msg = msix_get_message(dev, vector);
-        ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
+        ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
         if (ret < 0) {
             goto undo;
         }
diff --git a/kvm-all.c b/kvm-all.c
index a88f917..d94c0e4 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -25,6 +25,7 @@
 #include "qemu/error-report.h"
 #include "hw/hw.h"
 #include "hw/pci/msi.h"
+#include "hw/pci/msix.h"
 #include "hw/s390x/adapter.h"
 #include "exec/gdbstub.h"
 #include "sysemu/kvm_int.h"
@@ -1237,10 +1238,23 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
     return kvm_set_irq(s, route->kroute.gsi, 1);
 }
 
-int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev)
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
 {
     struct kvm_irq_routing_entry kroute = {};
     int virq;
+    MSIMessage msg = {0, 0};
+
+    if (dev) {
+        if (msix_enabled(dev)) {
+            msg = msix_get_message(dev, vector);
+        } else if (msi_enabled(dev)) {
+            msg = msi_get_message(dev, vector);
+        } else {
+            /* Should never happen */
+            error_report("%s: unknown interrupt type", __func__);
+            abort();
+        }
+    }
 
     if (kvm_gsi_direct_mapping()) {
         return kvm_arch_msi_data_to_gsi(msg.data);
@@ -1390,7 +1404,7 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
     abort();
 }
 
-int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
 {
     return -ENOSYS;
 }
diff --git a/kvm-stub.c b/kvm-stub.c
index 07c09d1..982e590 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -116,7 +116,7 @@ int kvm_on_sigbus(int code, void *addr)
 }
 
 #ifndef CONFIG_USER_ONLY
-int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev)
+int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
 {
     return -ENOSYS;
 }
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 9c00e48..f574513 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -3202,8 +3202,7 @@ void kvm_arch_init_irq_routing(KVMState *s)
         /* If the ioapic is in QEMU and the lapics are in KVM, reserve
            MSI routes for signaling interrupts to the local apics. */
         for (i = 0; i < IOAPIC_NUM_PINS; i++) {
-            struct MSIMessage msg = { 0x0, 0x0 };
-            if (kvm_irqchip_add_msi_route(s, msg, NULL) < 0) {
+            if (kvm_irqchip_add_msi_route(s, 0, NULL) < 0) {
                 error_report("Could not enable split IRQ mode.");
                 exit(1);
             }
-- 
MST

[Qemu-devel] [PULL v5 31/57] kvm-irqchip: i386: add hook for add/remove virq

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

Adding two hooks to be notified when adding/removing msi routes. There
are two kinds of MSI routes:

- in kvm_irqchip_add_irq_route(): before assigning IRQFD. Used by
  vhost, vfio, etc.

- in kvm_irqchip_send_msi(): when sending direct MSI message, if
  direct MSI not allowed, we will first create one MSI route entry
  in the kernel, then trigger it.

This patch only hooks the first one (irqfd case). We do not need to
take care for the 2nd one, since it's only used by QEMU userspace
(kvm-apic) and the messages will always do in-time translation when
triggered. While we need to note them down for the 1st one, so that we
can notify the kernel when cache invalidation happens.

Also, we do not hook IOAPIC msi routes (we have explicit notifier for
IOAPIC to keep its cache updated). We only need to care about irqfd
users.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/sysemu/kvm.h     |  6 ++++++
 kvm-all.c                |  2 ++
 target-arm/kvm.c         | 11 +++++++++++
 target-i386/kvm.c        | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 target-mips/kvm.c        | 11 +++++++++++
 target-ppc/kvm.c         | 11 +++++++++++
 target-s390x/kvm.c       | 11 +++++++++++
 target-i386/trace-events |  2 ++
 8 files changed, 102 insertions(+)

diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index e5d90bd..0a16e0e 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -359,6 +359,12 @@ void kvm_arch_init_irq_routing(KVMState *s);
 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
                              uint64_t address, uint32_t data, PCIDevice *dev);
 
+/* Notify arch about newly added MSI routes */
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+                                int vector, PCIDevice *dev);
+/* Notify arch about released MSI routes */
+int kvm_arch_release_virq_post(int virq);
+
 int kvm_arch_msi_data_to_gsi(uint32_t data);
 
 int kvm_set_irq(KVMState *s, int irq, int level);
diff --git a/kvm-all.c b/kvm-all.c
index d94c0e4..69ff658 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1133,6 +1133,7 @@ void kvm_irqchip_release_virq(KVMState *s, int virq)
         }
     }
     clear_gsi(s, virq);
+    kvm_arch_release_virq_post(virq);
 }
 
 static unsigned int kvm_hash_msi(uint32_t data)
@@ -1281,6 +1282,7 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
     }
 
     kvm_add_routing_entry(s, &kroute);
+    kvm_arch_add_msi_route_post(&kroute, vector, dev);
     kvm_irqchip_commit_routes(s);
 
     return virq;
diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index 5c2bd7a..dbe393c 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c
@@ -622,6 +622,17 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
     return 0;
 }
 
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+                                int vector, PCIDevice *dev)
+{
+    return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+    return 0;
+}
+
 int kvm_arch_msi_data_to_gsi(uint32_t data)
 {
     return (data - 32) & 0xffff;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index f574513..8875034 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -3400,6 +3400,54 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
     return 0;
 }
 
+typedef struct MSIRouteEntry MSIRouteEntry;
+
+struct MSIRouteEntry {
+    PCIDevice *dev;             /* Device pointer */
+    int vector;                 /* MSI/MSIX vector index */
+    int virq;                   /* Virtual IRQ index */
+    QLIST_ENTRY(MSIRouteEntry) list;
+};
+
+/* List of used GSI routes */
+static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \
+    QLIST_HEAD_INITIALIZER(msi_route_list);
+
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+                                int vector, PCIDevice *dev)
+{
+    MSIRouteEntry *entry;
+
+    if (!dev) {
+        /* These are (possibly) IOAPIC routes only used for split
+         * kernel irqchip mode, while what we are housekeeping are
+         * PCI devices only. */
+        return 0;
+    }
+
+    entry = g_new0(MSIRouteEntry, 1);
+    entry->dev = dev;
+    entry->vector = vector;
+    entry->virq = route->gsi;
+    QLIST_INSERT_HEAD(&msi_route_list, entry, list);
+
+    trace_kvm_x86_add_msi_route(route->gsi);
+    return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+    MSIRouteEntry *entry, *next;
+    QLIST_FOREACH_SAFE(entry, &msi_route_list, list, next) {
+        if (entry->virq == virq) {
+            trace_kvm_x86_remove_msi_route(virq);
+            QLIST_REMOVE(entry, list);
+            break;
+        }
+    }
+    return 0;
+}
+
 int kvm_arch_msi_data_to_gsi(uint32_t data)
 {
     abort();
diff --git a/target-mips/kvm.c b/target-mips/kvm.c
index f3f832d..dcf5fbb 100644
--- a/target-mips/kvm.c
+++ b/target-mips/kvm.c
@@ -1043,6 +1043,17 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
     return 0;
 }
 
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+                                int vector, PCIDevice *dev)
+{
+    return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+    return 0;
+}
+
 int kvm_arch_msi_data_to_gsi(uint32_t data)
 {
     abort();
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 7a8f555..91e6daf 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -2621,6 +2621,17 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
     return 0;
 }
 
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+                                int vector, PCIDevice *dev)
+{
+    return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+    return 0;
+}
+
 int kvm_arch_msi_data_to_gsi(uint32_t data)
 {
     return data & 0xffff;
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 2991bff..80ac621 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -2267,6 +2267,17 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
     return 0;
 }
 
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+                                int vector, PCIDevice *dev)
+{
+    return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+    return 0;
+}
+
 int kvm_arch_msi_data_to_gsi(uint32_t data)
 {
     abort();
diff --git a/target-i386/trace-events b/target-i386/trace-events
index 2113075..818058c 100644
--- a/target-i386/trace-events
+++ b/target-i386/trace-events
@@ -2,3 +2,5 @@
 
 # target-i386/kvm.c
 kvm_x86_fixup_msi_error(uint32_t gsi) "VT-d failed to remap interrupt for GSI %" PRIu32
+kvm_x86_add_msi_route(int virq) "Adding route entry for virq %d"
+kvm_x86_remove_msi_route(int virq) "Removing route entry for virq %d"
-- 
MST

[Qemu-devel] [PULL v5 32/57] kvm-irqchip: x86: add msi route notify fn

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

One more IEC notifier is added to let msi routes know about the IEC
changes. When interrupt invalidation happens, all registered msi routes
will be updated for all PCI devices.

Since both vfio and vhost are possible gsi route consumers, this patch
will go one step further to keep them safe in split irqchip mode and
when irqfd is enabled.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
[move trace-events lines into target-i386/trace-events]
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/pci/pci.h     |  2 ++
 hw/pci/pci.c             | 15 +++++++++++++++
 kvm-all.c                | 10 +---------
 target-i386/kvm.c        | 30 ++++++++++++++++++++++++++++++
 target-i386/trace-events |  1 +
 5 files changed, 49 insertions(+), 9 deletions(-)

diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 9ed1624..74d797d 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -805,4 +805,6 @@ extern const VMStateDescription vmstate_pci_device;
     .offset     = vmstate_offset_pointer(_state, _field, PCIDevice), \
 }
 
+MSIMessage pci_get_msi_message(PCIDevice *dev, int vector);
+
 #endif
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 149994b..728c6d4 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2596,6 +2596,21 @@ PCIDevice *pci_get_function_0(PCIDevice *pci_dev)
     }
 }
 
+MSIMessage pci_get_msi_message(PCIDevice *dev, int vector)
+{
+    MSIMessage msg;
+    if (msix_enabled(dev)) {
+        msg = msix_get_message(dev, vector);
+    } else if (msi_enabled(dev)) {
+        msg = msi_get_message(dev, vector);
+    } else {
+        /* Should never happen */
+        error_report("%s: unknown interrupt type", __func__);
+        abort();
+    }
+    return msg;
+}
+
 static const TypeInfo pci_device_type_info = {
     .name = TYPE_PCI_DEVICE,
     .parent = TYPE_DEVICE,
diff --git a/kvm-all.c b/kvm-all.c
index 69ff658..ca30a58 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1246,15 +1246,7 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
     MSIMessage msg = {0, 0};
 
     if (dev) {
-        if (msix_enabled(dev)) {
-            msg = msix_get_message(dev, vector);
-        } else if (msi_enabled(dev)) {
-            msg = msi_get_message(dev, vector);
-        } else {
-            /* Should never happen */
-            error_report("%s: unknown interrupt type", __func__);
-            abort();
-        }
+        msg = pci_get_msi_message(dev, vector);
     }
 
     if (kvm_gsi_direct_mapping()) {
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8875034..61f57f9 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -36,6 +36,7 @@
 #include "hw/i386/apic_internal.h"
 #include "hw/i386/apic-msidef.h"
 #include "hw/i386/intel_iommu.h"
+#include "hw/i386/x86-iommu.h"
 
 #include "exec/ioport.h"
 #include "standard-headers/asm-x86/hyperv.h"
@@ -3413,9 +3414,26 @@ struct MSIRouteEntry {
 static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \
     QLIST_HEAD_INITIALIZER(msi_route_list);
 
+static void kvm_update_msi_routes_all(void *private, bool global,
+                                      uint32_t index, uint32_t mask)
+{
+    int cnt = 0;
+    MSIRouteEntry *entry;
+    MSIMessage msg;
+    /* TODO: explicit route update */
+    QLIST_FOREACH(entry, &msi_route_list, list) {
+        cnt++;
+        msg = pci_get_msi_message(entry->dev, entry->vector);
+        kvm_irqchip_update_msi_route(kvm_state, entry->virq,
+                                     msg, entry->dev);
+    }
+    trace_kvm_x86_update_msi_routes(cnt);
+}
+
 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
                                 int vector, PCIDevice *dev)
 {
+    static bool notify_list_inited = false;
     MSIRouteEntry *entry;
 
     if (!dev) {
@@ -3432,6 +3450,18 @@ int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
     QLIST_INSERT_HEAD(&msi_route_list, entry, list);
 
     trace_kvm_x86_add_msi_route(route->gsi);
+
+    if (!notify_list_inited) {
+        /* For the first time we do add route, add ourselves into
+         * IOMMU's IEC notify list if needed. */
+        X86IOMMUState *iommu = x86_iommu_get_default();
+        if (iommu) {
+            x86_iommu_iec_register_notifier(iommu,
+                                            kvm_update_msi_routes_all,
+                                            NULL);
+        }
+        notify_list_inited = true;
+    }
     return 0;
 }
 
diff --git a/target-i386/trace-events b/target-i386/trace-events
index 818058c..ccc49e3 100644
--- a/target-i386/trace-events
+++ b/target-i386/trace-events
@@ -4,3 +4,4 @@
 kvm_x86_fixup_msi_error(uint32_t gsi) "VT-d failed to remap interrupt for GSI %" PRIu32
 kvm_x86_add_msi_route(int virq) "Adding route entry for virq %d"
 kvm_x86_remove_msi_route(int virq) "Removing route entry for virq %d"
+kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
-- 
MST

[Qemu-devel] [PULL v5 33/57] kvm-irqchip: do explicit commit when update irq

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

In the past, we are doing gsi route commit for each irqchip route
update. This is not efficient if we are updating lots of routes in the
same time. This patch removes the committing phase in
kvm_irqchip_update_msi_route(). Instead, we do explicit commit after all
routes updated.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/sysemu/kvm.h     | 2 +-
 hw/i386/kvm/pci-assign.c | 2 ++
 hw/misc/ivshmem.c        | 1 +
 hw/vfio/pci.c            | 1 +
 hw/virtio/virtio-pci.c   | 1 +
 kvm-all.c                | 2 --
 kvm-stub.c               | 4 ++++
 target-i386/kvm.c        | 1 +
 8 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 0a16e0e..c9c2436 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -371,7 +371,6 @@ int kvm_set_irq(KVMState *s, int irq, int level);
 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 
 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
-void kvm_irqchip_commit_routes(KVMState *s);
 
 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
@@ -494,6 +493,7 @@ static inline void cpu_synchronize_post_init(CPUState *cpu)
 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev);
 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
                                  PCIDevice *dev);
+void kvm_irqchip_commit_routes(KVMState *s);
 void kvm_irqchip_release_virq(KVMState *s, int virq);
 
 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter);
diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index 334dfc4..8238fbc 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -1015,6 +1015,7 @@ static void assigned_dev_update_msi_msg(PCIDevice *pci_dev)
 
     kvm_irqchip_update_msi_route(kvm_state, assigned_dev->msi_virq[0],
                                  msi_get_message(pci_dev, 0), pci_dev);
+    kvm_irqchip_commit_routes(kvm_state);
 }
 
 static bool assigned_dev_msix_masked(MSIXTableEntry *entry)
@@ -1602,6 +1603,7 @@ static void assigned_dev_msix_mmio_write(void *opaque, hwaddr addr,
                 if (ret) {
                     error_report("Error updating irq routing entry (%d)", ret);
                 }
+                kvm_irqchip_commit_routes(kvm_state);
             }
         }
     }
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 023da84..40a2ebc 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -322,6 +322,7 @@ static int ivshmem_vector_unmask(PCIDevice *dev, unsigned vector,
     if (ret < 0) {
         return ret;
     }
+    kvm_irqchip_commit_routes(kvm_state);
 
     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, v->virq);
 }
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 87a6f05..7bfa17c 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -458,6 +458,7 @@ static void vfio_update_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage msg,
                                      PCIDevice *pdev)
 {
     kvm_irqchip_update_msi_route(kvm_state, vector->virq, msg, pdev);
+    kvm_irqchip_commit_routes(kvm_state);
 }
 
 static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index cbdfd59..f0677b7 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -842,6 +842,7 @@ static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
             if (ret < 0) {
                 return ret;
             }
+            kvm_irqchip_commit_routes(kvm_state);
         }
     }
 
diff --git a/kvm-all.c b/kvm-all.c
index ca30a58..3764ba9 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1094,8 +1094,6 @@ static int kvm_update_routing_entry(KVMState *s,
 
         *entry = *new_entry;
 
-        kvm_irqchip_commit_routes(s);
-
         return 0;
     }
 
diff --git a/kvm-stub.c b/kvm-stub.c
index 982e590..64e23f6 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -135,6 +135,10 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
     return -ENOSYS;
 }
 
+void kvm_irqchip_commit_routes(KVMState *s)
+{
+}
+
 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
 {
     return -ENOSYS;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 61f57f9..0a09be6 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -3427,6 +3427,7 @@ static void kvm_update_msi_routes_all(void *private, bool global,
         kvm_irqchip_update_msi_route(kvm_state, entry->virq,
                                      msg, entry->dev);
     }
+    kvm_irqchip_commit_routes(kvm_state);
     trace_kvm_x86_update_msi_routes(cnt);
 }
 
-- 
MST

[Qemu-devel] [PULL v5 34/57] intel_iommu: support all masks in interrupt entry cache invalidation

[Michael S. Tsirkin]

From: Radim Krčmář <rkrcmar@redhat.com>

Linux guests do not gracefully handle cases when the invalidation mask
they wanted is not supported, probably because real hardware always
allowed all.

We can just say that all 16 masks are supported, because both
ioapic_iec_notifier and kvm_update_msi_routes_all invalidate all caches.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu_internal.h | 1 +
 hw/i386/intel_iommu.c          | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 72b0114..0829a50 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -186,6 +186,7 @@
 /* Interrupt Remapping support */
 #define VTD_ECAP_IR                 (1ULL << 3)
 #define VTD_ECAP_EIM                (1ULL << 4)
+#define VTD_ECAP_MHMV               (15ULL << 20)
 
 /* CAP_REG */
 /* (offset >> 4) << 24 */
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 5a97548..df2678b 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2362,7 +2362,7 @@ static void vtd_init(IntelIOMMUState *s)
     s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
 
     if (x86_iommu->intr_supported) {
-        s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM;
+        s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM | VTD_ECAP_MHMV;
     }
 
     vtd_reset_context_cache(s);
-- 
MST

[Qemu-devel] [PULL v5 35/57] kvm-all: add trace events for kvm irqchip ops

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

These will help us monitoring irqchip route activities more easily.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 kvm-all.c    | 5 +++++
 trace-events | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/kvm-all.c b/kvm-all.c
index 3764ba9..ef81ca5 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1048,6 +1048,7 @@ void kvm_irqchip_commit_routes(KVMState *s)
     int ret;
 
     s->irq_routes->flags = 0;
+    trace_kvm_irqchip_commit_routes();
     ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
     assert(ret == 0);
 }
@@ -1271,6 +1272,8 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
         return -EINVAL;
     }
 
+    trace_kvm_irqchip_add_msi_route(virq);
+
     kvm_add_routing_entry(s, &kroute);
     kvm_arch_add_msi_route_post(&kroute, vector, dev);
     kvm_irqchip_commit_routes(s);
@@ -1301,6 +1304,8 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
         return -EINVAL;
     }
 
+    trace_kvm_irqchip_update_msi_route(virq);
+
     return kvm_update_routing_entry(s, &kroute);
 }
 
diff --git a/trace-events b/trace-events
index 4767059..52c6a6c 100644
--- a/trace-events
+++ b/trace-events
@@ -118,6 +118,9 @@ kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d"
 kvm_device_ioctl(int fd, int type, void *arg) "dev fd %d, type 0x%x, arg %p"
 kvm_failed_reg_get(uint64_t id, const char *msg) "Warning: Unable to retrieve ONEREG %" PRIu64 " from KVM: %s"
 kvm_failed_reg_set(uint64_t id, const char *msg) "Warning: Unable to set ONEREG %" PRIu64 " to KVM: %s"
+kvm_irqchip_commit_routes(void) ""
+kvm_irqchip_add_msi_route(int virq) "Adding MSI route virq=%d"
+kvm_irqchip_update_msi_route(int virq) "Updating MSI route virq=%d"
 
 # TCG related tracing (mostly disabled by default)
 # cpu-exec.c
-- 
MST

[Qemu-devel] [PULL v5 36/57] intel_iommu: disallow kernel-irqchip=on with IR

[Michael S. Tsirkin]

From: Peter Xu <peterx@redhat.com>

When user specify "intremap=on" with "-M kernel-irqchip=on", throw error
and then quit.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/intel_iommu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index df2678b..0e139d1 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -20,6 +20,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/error-report.h"
 #include "hw/sysbus.h"
 #include "exec/address-spaces.h"
 #include "intel_iommu_internal.h"
@@ -29,6 +30,7 @@
 #include "hw/boards.h"
 #include "hw/i386/x86-iommu.h"
 #include "hw/pci-host/q35.h"
+#include "sysemu/kvm.h"
 
 /*#define DEBUG_INTEL_IOMMU*/
 #ifdef DEBUG_INTEL_IOMMU
@@ -2448,6 +2450,7 @@ static void vtd_realize(DeviceState *dev, Error **errp)
     PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
     PCIBus *bus = pcms->bus;
     IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
+    X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
 
     VTD_DPRINTF(GENERAL, "");
     memset(s->vtd_as_by_bus_num, 0, sizeof(s->vtd_as_by_bus_num));
@@ -2464,6 +2467,14 @@ static void vtd_realize(DeviceState *dev, Error **errp)
     pci_setup_iommu(bus, vtd_host_dma_iommu, dev);
     /* Pseudo address space under root PCI bus. */
     pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
+
+    /* Currently Intel IOMMU IR only support "kernel-irqchip={off|split}" */
+    if (x86_iommu->intr_supported && kvm_irqchip_in_kernel() &&
+        !kvm_irqchip_is_split()) {
+        error_report("Intel Interrupt Remapping cannot work with "
+                     "kernel-irqchip=on, please use 'split|off'.");
+        exit(1);
+    }
 }
 
 static void vtd_class_init(ObjectClass *klass, void *data)
-- 
MST

[Qemu-devel] [PULL v5 37/57] virtio: Add typedef for handle_output

[Michael S. Tsirkin]

From: Fam Zheng <famz@redhat.com>

The function pointer signature has been repeated a few times, using a
typedef may make coding easier.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/virtio/virtio.h | 5 +++--
 hw/virtio/virtio.c         | 9 ++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 8a681f5..3670829 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -138,9 +138,10 @@ void virtio_cleanup(VirtIODevice *vdev);
 /* Set the child bus name. */
 void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name);
 
+typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *);
+
 VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
-                            void (*handle_output)(VirtIODevice *,
-                                                  VirtQueue *));
+                            VirtIOHandleOutput handle_output);
 
 void virtio_del_queue(VirtIODevice *vdev, int n);
 
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 18153d5..2cc68d24 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -95,8 +95,8 @@ struct VirtQueue
     int inuse;
 
     uint16_t vector;
-    void (*handle_output)(VirtIODevice *vdev, VirtQueue *vq);
-    void (*handle_aio_output)(VirtIODevice *vdev, VirtQueue *vq);
+    VirtIOHandleOutput handle_output;
+    VirtIOHandleOutput handle_aio_output;
     VirtIODevice *vdev;
     EventNotifier guest_notifier;
     EventNotifier host_notifier;
@@ -1131,7 +1131,7 @@ void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector)
 }
 
 VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
-                            void (*handle_output)(VirtIODevice *, VirtQueue *))
+                            VirtIOHandleOutput handle_output)
 {
     int i;
 
@@ -1804,8 +1804,7 @@ static void virtio_queue_host_notifier_aio_read(EventNotifier *n)
 }
 
 void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
-                                                void (*handle_output)(VirtIODevice *,
-                                                                      VirtQueue *))
+                                                VirtIOHandleOutput handle_output)
 {
     if (handle_output) {
         vq->handle_aio_output = handle_output;
-- 
MST

[Qemu-devel] [PULL v5 38/57] virtio: Introduce virtio_add_queue_aio

[Michael S. Tsirkin]

From: Fam Zheng <famz@redhat.com>

Using this function instead of virtio_add_queue marks the vq as aio
based. This differentiation will be useful in later patches.

Distinguish between virtqueue processing in the iohandler context and main loop
AioContext.  iohandler context is isolated from AioContexts and therefore does
not run during aio_poll().

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/virtio/virtio.h |  3 +++
 hw/virtio/virtio.c         | 38 ++++++++++++++++++++++++++++++++++----
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 3670829..7a82f79 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -143,6 +143,9 @@ typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *);
 VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
                             VirtIOHandleOutput handle_output);
 
+VirtQueue *virtio_add_queue_aio(VirtIODevice *vdev, int queue_size,
+                                VirtIOHandleOutput handle_output);
+
 void virtio_del_queue(VirtIODevice *vdev, int n);
 
 void *virtqueue_alloc_element(size_t sz, unsigned out_num, unsigned in_num);
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 2cc68d24..2fbed0c 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -97,6 +97,7 @@ struct VirtQueue
     uint16_t vector;
     VirtIOHandleOutput handle_output;
     VirtIOHandleOutput handle_aio_output;
+    bool use_aio;
     VirtIODevice *vdev;
     EventNotifier guest_notifier;
     EventNotifier host_notifier;
@@ -1130,8 +1131,9 @@ void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector)
     }
 }
 
-VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
-                            VirtIOHandleOutput handle_output)
+static VirtQueue *virtio_add_queue_internal(VirtIODevice *vdev, int queue_size,
+                                            VirtIOHandleOutput handle_output,
+                                            bool use_aio)
 {
     int i;
 
@@ -1148,10 +1150,28 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
     vdev->vq[i].vring.align = VIRTIO_PCI_VRING_ALIGN;
     vdev->vq[i].handle_output = handle_output;
     vdev->vq[i].handle_aio_output = NULL;
+    vdev->vq[i].use_aio = use_aio;
 
     return &vdev->vq[i];
 }
 
+/* Add a virt queue and mark AIO.
+ * An AIO queue will use the AioContext based event interface instead of the
+ * default IOHandler and EventNotifier interface.
+ */
+VirtQueue *virtio_add_queue_aio(VirtIODevice *vdev, int queue_size,
+                                VirtIOHandleOutput handle_output)
+{
+    return virtio_add_queue_internal(vdev, queue_size, handle_output, true);
+}
+
+/* Add a normal virt queue (on the contrary to the AIO version above. */
+VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
+                            VirtIOHandleOutput handle_output)
+{
+    return virtio_add_queue_internal(vdev, queue_size, handle_output, false);
+}
+
 void virtio_del_queue(VirtIODevice *vdev, int n)
 {
     if (n < 0 || n >= VIRTIO_QUEUE_MAX) {
@@ -1830,11 +1850,21 @@ static void virtio_queue_host_notifier_read(EventNotifier *n)
 void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
                                                bool set_handler)
 {
+    AioContext *ctx = qemu_get_aio_context();
     if (assign && set_handler) {
-        event_notifier_set_handler(&vq->host_notifier, true,
+        if (vq->use_aio) {
+            aio_set_event_notifier(ctx, &vq->host_notifier, true,
                                    virtio_queue_host_notifier_read);
+        } else {
+            event_notifier_set_handler(&vq->host_notifier, true,
+                                       virtio_queue_host_notifier_read);
+        }
     } else {
-        event_notifier_set_handler(&vq->host_notifier, true, NULL);
+        if (vq->use_aio) {
+            aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL);
+        } else {
+            event_notifier_set_handler(&vq->host_notifier, true, NULL);
+        }
     }
     if (!assign) {
         /* Test and clear notifier before after disabling event,
-- 
MST

[Qemu-devel] [PULL v5 39/57] virtio-blk: Call virtio_add_queue_aio

[Michael S. Tsirkin]

From: Fam Zheng <famz@redhat.com>

AIO based handler is more appropriate here because it will then
cooperate with bdrv_drained_begin/end. It is needed by the coming
revert patch.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/block/virtio-blk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 357ff90..728b278 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -914,7 +914,7 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
     s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1;
 
     for (i = 0; i < conf->num_queues; i++) {
-        virtio_add_queue(vdev, 128, virtio_blk_handle_output);
+        virtio_add_queue_aio(vdev, 128, virtio_blk_handle_output);
     }
     virtio_blk_data_plane_create(vdev, conf, &s->dataplane, &err);
     if (err != NULL) {
-- 
MST

[Qemu-devel] [PULL v5 40/57] virtio-scsi: Call virtio_add_queue_aio

[Michael S. Tsirkin]

From: Fam Zheng <famz@redhat.com>

AIO based handler is more appropriate here because it will then
cooperate with bdrv_drained_begin/end. It is needed by the coming
revert patch.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/virtio-scsi.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 722c93e..45e2ee8 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -846,13 +846,10 @@ void virtio_scsi_common_realize(DeviceState *dev, Error **errp,
     s->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE;
     s->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE;
 
-    s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE,
-                                  ctrl);
-    s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE,
-                                   evt);
+    s->ctrl_vq = virtio_add_queue_aio(vdev, VIRTIO_SCSI_VQ_SIZE, ctrl);
+    s->event_vq = virtio_add_queue_aio(vdev, VIRTIO_SCSI_VQ_SIZE, evt);
     for (i = 0; i < s->conf.num_queues; i++) {
-        s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE,
-                                         cmd);
+        s->cmd_vqs[i] = virtio_add_queue_aio(vdev, VIRTIO_SCSI_VQ_SIZE, cmd);
     }
 
     if (s->conf.iothread) {
-- 
MST

[Qemu-devel] [PULL v5 41/57] Revert "mirror: Workaround for unexpected iohandler events during completion"

[Michael S. Tsirkin]

From: Fam Zheng <famz@redhat.com>

This reverts commit ab27c3b5e7408693dde0b565f050aa55c4a1bcef.

The virtio storage device host notifiers now work with
bdrv_drained_begin/end, so we don't need this hack any more.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
---
 block/mirror.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/block/mirror.c b/block/mirror.c
index b1e633e..9ae11e5 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -508,9 +508,6 @@ static void mirror_exit(BlockJob *job, void *opaque)
     block_job_completed(&s->common, data->ret);
     g_free(data);
     bdrv_drained_end(src);
-    if (qemu_get_aio_context() == bdrv_get_aio_context(src)) {
-        aio_enable_external(iohandler_get_aio_context());
-    }
     bdrv_unref(src);
 }
 
@@ -734,12 +731,6 @@ immediate_exit:
     /* Before we switch to target in mirror_exit, make sure data doesn't
      * change. */
     bdrv_drained_begin(bs);
-    if (qemu_get_aio_context() == bdrv_get_aio_context(bs)) {
-        /* FIXME: virtio host notifiers run on iohandler_ctx, therefore the
-         * above bdrv_drained_end isn't enough to quiesce it. This is ugly, we
-         * need a block layer API change to achieve this. */
-        aio_disable_external(iohandler_get_aio_context());
-    }
     block_job_defer_to_main_loop(&s->common, mirror_exit, data);
 }
 
-- 
MST

[Qemu-devel] [PULL v5 42/57] virtio-scsi: Replace HandleOutput typedef

[Michael S. Tsirkin]

From: Fam Zheng <famz@redhat.com>

There is a new common one in virtio.h, use it.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/virtio/virtio-scsi.h | 6 ++----
 hw/scsi/virtio-scsi.c           | 5 +++--
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index 5e3f088..a1e0cfb 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -121,11 +121,9 @@ typedef struct VirtIOSCSIReq {
     } req;
 } VirtIOSCSIReq;
 
-typedef void (*HandleOutput)(VirtIODevice *, VirtQueue *);
-
 void virtio_scsi_common_realize(DeviceState *dev, Error **errp,
-                                HandleOutput ctrl, HandleOutput evt,
-                                HandleOutput cmd);
+                                VirtIOHandleOutput ctrl, VirtIOHandleOutput evt,
+                                VirtIOHandleOutput cmd);
 
 void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp);
 void virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq);
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 45e2ee8..88d4bf0 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -824,8 +824,9 @@ static struct SCSIBusInfo virtio_scsi_scsi_info = {
 };
 
 void virtio_scsi_common_realize(DeviceState *dev, Error **errp,
-                                HandleOutput ctrl, HandleOutput evt,
-                                HandleOutput cmd)
+                                VirtIOHandleOutput ctrl,
+                                VirtIOHandleOutput evt,
+                                VirtIOHandleOutput cmd)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev);
-- 
MST

[Qemu-devel] [PULL v5 43/57] virtio-net: Remove old migration version support

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

virtio-net has had version 11 since 0ce0e8f4 in 2009
(v0.11.0-rc0-1480-g0ce0e8f) - remove the code to support loading
anything earlier.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/net/virtio-net.c | 87 +++++++++++++++++++++--------------------------------
 1 file changed, 34 insertions(+), 53 deletions(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 9999899..550db30 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1543,7 +1543,7 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
     VirtIONet *n = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(n);
 
-    if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION)
+    if (version_id != VIRTIO_NET_VM_VERSION)
         return -EINVAL;
 
     return virtio_load(vdev, f, version_id);
@@ -1562,68 +1562,49 @@ static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f,
                                virtio_vdev_has_feature(vdev,
                                                        VIRTIO_F_VERSION_1));
 
-    if (version_id >= 3)
-        n->status = qemu_get_be16(f);
+    n->status = qemu_get_be16(f);
 
-    if (version_id >= 4) {
-        if (version_id < 8) {
-            n->promisc = qemu_get_be32(f);
-            n->allmulti = qemu_get_be32(f);
-        } else {
-            n->promisc = qemu_get_byte(f);
-            n->allmulti = qemu_get_byte(f);
-        }
-    }
+    n->promisc = qemu_get_byte(f);
+    n->allmulti = qemu_get_byte(f);
 
-    if (version_id >= 5) {
-        n->mac_table.in_use = qemu_get_be32(f);
-        /* MAC_TABLE_ENTRIES may be different from the saved image */
-        if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
-            qemu_get_buffer(f, n->mac_table.macs,
-                            n->mac_table.in_use * ETH_ALEN);
-        } else {
-            int64_t i;
-
-            /* Overflow detected - can happen if source has a larger MAC table.
-             * We simply set overflow flag so there's no need to maintain the
-             * table of addresses, discard them all.
-             * Note: 64 bit math to avoid integer overflow.
-             */
-            for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) {
-                qemu_get_byte(f);
-            }
-            n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
-            n->mac_table.in_use = 0;
+    n->mac_table.in_use = qemu_get_be32(f);
+    /* MAC_TABLE_ENTRIES may be different from the saved image */
+    if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
+        qemu_get_buffer(f, n->mac_table.macs,
+                        n->mac_table.in_use * ETH_ALEN);
+    } else {
+        int64_t i;
+
+        /* Overflow detected - can happen if source has a larger MAC table.
+         * We simply set overflow flag so there's no need to maintain the
+         * table of addresses, discard them all.
+         * Note: 64 bit math to avoid integer overflow.
+         */
+        for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) {
+            qemu_get_byte(f);
         }
+        n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
+        n->mac_table.in_use = 0;
     }
  
-    if (version_id >= 6)
-        qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
+    qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
 
-    if (version_id >= 7) {
-        if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
-            error_report("virtio-net: saved image requires vnet_hdr=on");
-            return -1;
-        }
+    if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
+        error_report("virtio-net: saved image requires vnet_hdr=on");
+        return -1;
     }
 
-    if (version_id >= 9) {
-        n->mac_table.multi_overflow = qemu_get_byte(f);
-        n->mac_table.uni_overflow = qemu_get_byte(f);
-    }
+    n->mac_table.multi_overflow = qemu_get_byte(f);
+    n->mac_table.uni_overflow = qemu_get_byte(f);
 
-    if (version_id >= 10) {
-        n->alluni = qemu_get_byte(f);
-        n->nomulti = qemu_get_byte(f);
-        n->nouni = qemu_get_byte(f);
-        n->nobcast = qemu_get_byte(f);
-    }
+    n->alluni = qemu_get_byte(f);
+    n->nomulti = qemu_get_byte(f);
+    n->nouni = qemu_get_byte(f);
+    n->nobcast = qemu_get_byte(f);
 
-    if (version_id >= 11) {
-        if (qemu_get_byte(f) && !peer_has_ufo(n)) {
-            error_report("virtio-net: saved image requires TUN_F_UFO support");
-            return -1;
-        }
+    if (qemu_get_byte(f) && !peer_has_ufo(n)) {
+        error_report("virtio-net: saved image requires TUN_F_UFO support");
+        return -1;
     }
 
     if (n->max_queues > 1) {
-- 
MST

[Qemu-devel] [PULL v5 44/57] virtio-serial: Remove old migration version support

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

virtio-serial-bus has had version 3 since 37f95bf3d0 in 0.13-rc0;
it's time to clean it up a bit.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/char/virtio-serial-bus.c | 37 +++++++++++++++----------------------
 1 file changed, 15 insertions(+), 22 deletions(-)

diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index 6e5de6d..490b5ea 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -685,7 +685,7 @@ static void virtio_serial_post_load_timer_cb(void *opaque)
     s->post_load = NULL;
 }
 
-static int fetch_active_ports_list(QEMUFile *f, int version_id,
+static int fetch_active_ports_list(QEMUFile *f,
                                    VirtIOSerial *s, uint32_t nr_active_ports)
 {
     uint32_t i;
@@ -702,6 +702,7 @@ static int fetch_active_ports_list(QEMUFile *f, int version_id,
     /* Items in struct VirtIOSerialPort */
     for (i = 0; i < nr_active_ports; i++) {
         VirtIOSerialPort *port;
+        uint32_t elem_popped;
         uint32_t id;
 
         id = qemu_get_be32(f);
@@ -714,23 +715,19 @@ static int fetch_active_ports_list(QEMUFile *f, int version_id,
         s->post_load->connected[i].port = port;
         s->post_load->connected[i].host_connected = qemu_get_byte(f);
 
-        if (version_id > 2) {
-            uint32_t elem_popped;
-
-            qemu_get_be32s(f, &elem_popped);
-            if (elem_popped) {
-                qemu_get_be32s(f, &port->iov_idx);
-                qemu_get_be64s(f, &port->iov_offset);
+        qemu_get_be32s(f, &elem_popped);
+        if (elem_popped) {
+            qemu_get_be32s(f, &port->iov_idx);
+            qemu_get_be64s(f, &port->iov_offset);
 
-                port->elem =
-                    qemu_get_virtqueue_element(f, sizeof(VirtQueueElement));
+            port->elem =
+                qemu_get_virtqueue_element(f, sizeof(VirtQueueElement));
 
-                /*
-                 *  Port was throttled on source machine.  Let's
-                 *  unthrottle it here so data starts flowing again.
-                 */
-                virtio_serial_throttle_port(port, false);
-            }
+            /*
+             *  Port was throttled on source machine.  Let's
+             *  unthrottle it here so data starts flowing again.
+             */
+            virtio_serial_throttle_port(port, false);
         }
     }
     timer_mod(s->post_load->timer, 1);
@@ -739,7 +736,7 @@ static int fetch_active_ports_list(QEMUFile *f, int version_id,
 
 static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
 {
-    if (version_id > 3) {
+    if (version_id != 3) {
         return -EINVAL;
     }
 
@@ -756,10 +753,6 @@ static int virtio_serial_load_device(VirtIODevice *vdev, QEMUFile *f,
     int ret;
     uint32_t tmp;
 
-    if (version_id < 2) {
-        return 0;
-    }
-
     /* Unused */
     qemu_get_be16s(f, (uint16_t *) &tmp);
     qemu_get_be16s(f, (uint16_t *) &tmp);
@@ -781,7 +774,7 @@ static int virtio_serial_load_device(VirtIODevice *vdev, QEMUFile *f,
     qemu_get_be32s(f, &nr_active_ports);
 
     if (nr_active_ports) {
-        ret = fetch_active_ports_list(f, version_id, s, nr_active_ports);
+        ret = fetch_active_ports_list(f, s, nr_active_ports);
         if (ret) {
             return ret;
         }
-- 
MST

[Qemu-devel] [PULL v5 45/57] virtio: Migration helper function and macro

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

To make conversion of virtio devices to VMState simple
at first add a helper function for the simple virtio_save
case and a helper macro that defines the VMState structure.
These will probably go away or change as more of the virtio
code gets converted.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/virtio/virtio.h | 20 ++++++++++++++++++++
 hw/virtio/virtio.c         |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 7a82f79..d2490c1 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -171,6 +171,26 @@ bool virtio_should_notify(VirtIODevice *vdev, VirtQueue *vq);
 void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
 
 void virtio_save(VirtIODevice *vdev, QEMUFile *f);
+void virtio_vmstate_save(QEMUFile *f, void *opaque, size_t size);
+
+#define VMSTATE_VIRTIO_DEVICE(devname, v, getf, putf) \
+    static const VMStateDescription vmstate_virtio_ ## devname = { \
+        .name = "virtio-" #devname ,          \
+        .minimum_version_id = v,              \
+        .version_id = v,                      \
+        .fields = (VMStateField[]) {          \
+            {                                 \
+                .name = "virtio",             \
+                .info = &(const VMStateInfo) {\
+                        .name = "virtio",     \
+                        .get = getf,          \
+                        .put = putf,          \
+                    },                        \
+                .flags = VMS_SINGLE,          \
+            },                                \
+            VMSTATE_END_OF_LIST()             \
+        }                                     \
+    }
 
 int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id);
 
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 2fbed0c..752b271 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -1464,6 +1464,12 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
     vmstate_save_state(f, &vmstate_virtio, vdev, NULL);
 }
 
+/* A wrapper for use as a VMState .put function */
+void virtio_vmstate_save(QEMUFile *f, void *opaque, size_t size)
+{
+    virtio_save(VIRTIO_DEVICE(opaque), f);
+}
+
 static int virtio_set_features_nocheck(VirtIODevice *vdev, uint64_t val)
 {
     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
-- 
MST

[Qemu-devel] [PULL v5 46/57] virtio-scsi: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/scsi/virtio-scsi.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 88d4bf0..ce57ef6 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -663,22 +663,17 @@ static void virtio_scsi_reset(VirtIODevice *vdev)
 /* The device does not have anything to save beyond the virtio data.
  * Request data is saved with callbacks from SCSI devices.
  */
-static void virtio_scsi_save(QEMUFile *f, void *opaque)
+static void virtio_scsi_save(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
     virtio_save(vdev, f);
 }
 
-static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_scsi_load(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
-    int ret;
 
-    ret = virtio_load(vdev, f, version_id);
-    if (ret) {
-        return ret;
-    }
-    return 0;
+    return virtio_load(vdev, f, 1);
 }
 
 void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
@@ -862,7 +857,6 @@ static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOSCSI *s = VIRTIO_SCSI(dev);
-    static int virtio_scsi_id;
     Error *err = NULL;
 
     virtio_scsi_common_realize(dev, &err, virtio_scsi_handle_ctrl,
@@ -885,9 +879,6 @@ static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
             return;
         }
     }
-
-    register_savevm(dev, "virtio-scsi", virtio_scsi_id++, 1,
-                    virtio_scsi_save, virtio_scsi_load, s);
 }
 
 static void virtio_scsi_instance_init(Object *obj)
@@ -911,9 +902,6 @@ void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp)
 
 static void virtio_scsi_device_unrealize(DeviceState *dev, Error **errp)
 {
-    VirtIOSCSI *s = VIRTIO_SCSI(dev);
-
-    unregister_savevm(dev, "virtio-scsi", s);
     virtio_scsi_common_unrealize(dev, errp);
 }
 
@@ -930,6 +918,8 @@ static Property virtio_scsi_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+VMSTATE_VIRTIO_DEVICE(scsi, 1, virtio_scsi_load, virtio_scsi_save);
+
 static void virtio_scsi_common_class_init(ObjectClass *klass, void *data)
 {
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
@@ -946,6 +936,7 @@ static void virtio_scsi_class_init(ObjectClass *klass, void *data)
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 
     dc->props = virtio_scsi_properties;
+    dc->vmsd = &vmstate_virtio_scsi;
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     vdc->realize = virtio_scsi_device_realize;
     vdc->unrealize = virtio_scsi_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 47/57] virtio-blk: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/block/virtio-blk.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 728b278..475a822 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -798,7 +798,7 @@ static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status)
     }
 }
 
-static void virtio_blk_save(QEMUFile *f, void *opaque)
+static void virtio_blk_save(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
 
@@ -823,15 +823,12 @@ static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f)
     qemu_put_sbyte(f, 0);
 }
 
-static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_blk_load(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIOBlock *s = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(s);
 
-    if (version_id != 2)
-        return -EINVAL;
-
-    return virtio_load(vdev, f, version_id);
+    return virtio_load(vdev, f, 2);
 }
 
 static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f,
@@ -880,7 +877,6 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
     VirtIOBlock *s = VIRTIO_BLK(dev);
     VirtIOBlkConf *conf = &s->conf;
     Error *err = NULL;
-    static int virtio_blk_id;
     unsigned i;
 
     if (!conf->conf.blk) {
@@ -924,8 +920,6 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
     }
 
     s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s);
-    register_savevm(dev, "virtio-blk", virtio_blk_id++, 2,
-                    virtio_blk_save, virtio_blk_load, s);
     blk_set_dev_ops(s->blk, &virtio_block_ops, s);
     blk_set_guest_block_size(s->blk, s->conf.conf.logical_block_size);
 
@@ -940,7 +934,6 @@ static void virtio_blk_device_unrealize(DeviceState *dev, Error **errp)
     virtio_blk_data_plane_destroy(s->dataplane);
     s->dataplane = NULL;
     qemu_del_vm_change_state_handler(s->change);
-    unregister_savevm(dev, "virtio-blk", s);
     blockdev_mark_auto_del(s->blk);
     virtio_cleanup(vdev);
 }
@@ -958,6 +951,8 @@ static void virtio_blk_instance_init(Object *obj)
                                   DEVICE(obj), NULL);
 }
 
+VMSTATE_VIRTIO_DEVICE(blk, 2, virtio_blk_load, virtio_blk_save);
+
 static Property virtio_blk_properties[] = {
     DEFINE_BLOCK_PROPERTIES(VirtIOBlock, conf.conf),
     DEFINE_BLOCK_ERROR_PROPERTIES(VirtIOBlock, conf.conf),
@@ -979,6 +974,7 @@ static void virtio_blk_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     dc->props = virtio_blk_properties;
+    dc->vmsd = &vmstate_virtio_blk;
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     vdc->realize = virtio_blk_device_realize;
     vdc->unrealize = virtio_blk_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 48/57] virtio-rng: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/virtio/virtio-rng.c | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index 6b991a7..cd8ca10 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -120,22 +120,12 @@ static uint64_t get_features(VirtIODevice *vdev, uint64_t f, Error **errp)
     return f;
 }
 
-static void virtio_rng_save(QEMUFile *f, void *opaque)
-{
-    VirtIODevice *vdev = opaque;
-
-    virtio_save(vdev, f);
-}
-
-static int virtio_rng_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_rng_load(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIORNG *vrng = opaque;
     int ret;
 
-    if (version_id != 1) {
-        return -EINVAL;
-    }
-    ret = virtio_load(VIRTIO_DEVICE(vrng), f, version_id);
+    ret = virtio_load(VIRTIO_DEVICE(vrng), f, 1);
     if (ret != 0) {
         return ret;
     }
@@ -214,8 +204,6 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
     vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
                                                check_rate_limit, vrng);
     vrng->activate_timer = true;
-    register_savevm(dev, "virtio-rng", -1, 1, virtio_rng_save,
-                    virtio_rng_load, vrng);
 }
 
 static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
@@ -225,10 +213,11 @@ static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
 
     timer_del(vrng->rate_limit_timer);
     timer_free(vrng->rate_limit_timer);
-    unregister_savevm(dev, "virtio-rng", vrng);
     virtio_cleanup(vdev);
 }
 
+VMSTATE_VIRTIO_DEVICE(rng, 1, virtio_rng_load, virtio_vmstate_save);
+
 static Property virtio_rng_properties[] = {
     /* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s.  If
      * you have an entropy source capable of generating more entropy than this
@@ -246,6 +235,7 @@ static void virtio_rng_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     dc->props = virtio_rng_properties;
+    dc->vmsd = &vmstate_virtio_rng;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     vdc->realize = virtio_rng_device_realize;
     vdc->unrealize = virtio_rng_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 49/57] virtio-balloon: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/virtio/virtio-balloon.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 1a22e6d..5af429a 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -396,11 +396,6 @@ static void virtio_balloon_to_target(void *opaque, ram_addr_t target)
     trace_virtio_balloon_to_target(target, dev->num_pages);
 }
 
-static void virtio_balloon_save(QEMUFile *f, void *opaque)
-{
-    virtio_save(VIRTIO_DEVICE(opaque), f);
-}
-
 static void virtio_balloon_save_device(VirtIODevice *vdev, QEMUFile *f)
 {
     VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
@@ -409,12 +404,9 @@ static void virtio_balloon_save_device(VirtIODevice *vdev, QEMUFile *f)
     qemu_put_be32(f, s->actual);
 }
 
-static int virtio_balloon_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_balloon_load(QEMUFile *f, void *opaque, size_t size)
 {
-    if (version_id != 1)
-        return -EINVAL;
-
-    return virtio_load(VIRTIO_DEVICE(opaque), f, version_id);
+    return virtio_load(VIRTIO_DEVICE(opaque), f, 1);
 }
 
 static int virtio_balloon_load_device(VirtIODevice *vdev, QEMUFile *f,
@@ -454,9 +446,6 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
     s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats);
 
     reset_stats(s);
-
-    register_savevm(dev, "virtio-balloon", -1, 1,
-                    virtio_balloon_save, virtio_balloon_load, s);
 }
 
 static void virtio_balloon_device_unrealize(DeviceState *dev, Error **errp)
@@ -466,7 +455,6 @@ static void virtio_balloon_device_unrealize(DeviceState *dev, Error **errp)
 
     balloon_stats_destroy_timer(s);
     qemu_remove_balloon_handler(s);
-    unregister_savevm(dev, "virtio-balloon", s);
     virtio_cleanup(vdev);
 }
 
@@ -493,6 +481,8 @@ static void virtio_balloon_instance_init(Object *obj)
                         NULL, s, NULL);
 }
 
+VMSTATE_VIRTIO_DEVICE(balloon, 1, virtio_balloon_load, virtio_vmstate_save);
+
 static Property virtio_balloon_properties[] = {
     DEFINE_PROP_BIT("deflate-on-oom", VirtIOBalloon, host_features,
                     VIRTIO_BALLOON_F_DEFLATE_ON_OOM, false),
@@ -505,6 +495,7 @@ static void virtio_balloon_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     dc->props = virtio_balloon_properties;
+    dc->vmsd = &vmstate_virtio_balloon;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     vdc->realize = virtio_balloon_device_realize;
     vdc->unrealize = virtio_balloon_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 50/57] virtio-net: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/net/virtio-net.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 550db30..bb311c4 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1492,7 +1492,7 @@ static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue)
     virtio_net_set_queues(n);
 }
 
-static void virtio_net_save(QEMUFile *f, void *opaque)
+static void virtio_net_save(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIONet *n = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(n);
@@ -1538,15 +1538,12 @@ static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f)
     }
 }
 
-static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_net_load(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIONet *n = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(n);
 
-    if (version_id != VIRTIO_NET_VM_VERSION)
-        return -EINVAL;
-
-    return virtio_load(vdev, f, version_id);
+    return virtio_load(vdev, f, VIRTIO_NET_VM_VERSION);
 }
 
 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f,
@@ -1790,8 +1787,6 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
     nc->rxfilter_notify_enabled = 1;
 
     n->qdev = dev;
-    register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION,
-                    virtio_net_save, virtio_net_load, n);
 }
 
 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp)
@@ -1803,8 +1798,6 @@ static void virtio_net_device_unrealize(DeviceState *dev, Error **errp)
     /* This will stop vhost backend if appropriate. */
     virtio_net_set_status(vdev, 0);
 
-    unregister_savevm(dev, "virtio-net", n);
-
     g_free(n->netclient_name);
     n->netclient_name = NULL;
     g_free(n->netclient_type);
@@ -1839,6 +1832,9 @@ static void virtio_net_instance_init(Object *obj)
                                   DEVICE(n), NULL);
 }
 
+VMSTATE_VIRTIO_DEVICE(net, VIRTIO_NET_VM_VERSION, virtio_net_load,
+                      virtio_net_save);
+
 static Property virtio_net_properties[] = {
     DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true),
     DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features,
@@ -1893,6 +1889,7 @@ static void virtio_net_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     dc->props = virtio_net_properties;
+    dc->vmsd = &vmstate_virtio_net;
     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
     vdc->realize = virtio_net_device_realize;
     vdc->unrealize = virtio_net_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 51/57] virtio-serial: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/char/virtio-serial-bus.c | 27 ++++++---------------------
 1 file changed, 6 insertions(+), 21 deletions(-)

diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index 490b5ea..db57a38 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -594,12 +594,6 @@ static void vser_reset(VirtIODevice *vdev)
     guest_reset(vser);
 }
 
-static void virtio_serial_save(QEMUFile *f, void *opaque)
-{
-    /* The virtio device */
-    virtio_save(VIRTIO_DEVICE(opaque), f);
-}
-
 static void virtio_serial_save_device(VirtIODevice *vdev, QEMUFile *f)
 {
     VirtIOSerial *s = VIRTIO_SERIAL(vdev);
@@ -734,14 +728,10 @@ static int fetch_active_ports_list(QEMUFile *f,
     return 0;
 }
 
-static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_serial_load(QEMUFile *f, void *opaque, size_t size)
 {
-    if (version_id != 3) {
-        return -EINVAL;
-    }
-
     /* The virtio device */
-    return virtio_load(VIRTIO_DEVICE(opaque), f, version_id);
+    return virtio_load(VIRTIO_DEVICE(opaque), f, 3);
 }
 
 static int virtio_serial_load_device(VirtIODevice *vdev, QEMUFile *f,
@@ -1042,13 +1032,6 @@ static void virtio_serial_device_realize(DeviceState *dev, Error **errp)
 
     vser->post_load = NULL;
 
-    /*
-     * Register for the savevm section with the virtio-console name
-     * to preserve backward compat
-     */
-    register_savevm(dev, "virtio-console", -1, 3, virtio_serial_save,
-                    virtio_serial_load, vser);
-
     QLIST_INSERT_HEAD(&vserdevices.devices, vser, next);
 }
 
@@ -1079,8 +1062,6 @@ static void virtio_serial_device_unrealize(DeviceState *dev, Error **errp)
 
     QLIST_REMOVE(vser, next);
 
-    unregister_savevm(dev, "virtio-console", vser);
-
     g_free(vser->ivqs);
     g_free(vser->ovqs);
     g_free(vser->ports_map);
@@ -1093,6 +1074,9 @@ static void virtio_serial_device_unrealize(DeviceState *dev, Error **errp)
     virtio_cleanup(vdev);
 }
 
+/* Note: 'console' is used for backwards compatibility */
+VMSTATE_VIRTIO_DEVICE(console, 3, virtio_serial_load, virtio_vmstate_save);
+
 static Property virtio_serial_properties[] = {
     DEFINE_PROP_UINT32("max_ports", VirtIOSerial, serial.max_virtserial_ports,
                                                   31),
@@ -1108,6 +1092,7 @@ static void virtio_serial_class_init(ObjectClass *klass, void *data)
     QLIST_INIT(&vserdevices.devices);
 
     dc->props = virtio_serial_properties;
+    dc->vmsd = &vmstate_virtio_console;
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
     vdc->realize = virtio_serial_device_realize;
     vdc->unrealize = virtio_serial_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 52/57] 9pfs: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/9pfs/virtio-9p-device.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 494e85e..009b43f 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -97,14 +97,9 @@ static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
     g_free(cfg);
 }
 
-static void virtio_9p_save(QEMUFile *f, void *opaque)
+static int virtio_9p_load(QEMUFile *f, void *opaque, size_t size)
 {
-    virtio_save(VIRTIO_DEVICE(opaque), f);
-}
-
-static int virtio_9p_load(QEMUFile *f, void *opaque, int version_id)
-{
-    return virtio_load(VIRTIO_DEVICE(opaque), f, version_id);
+    return virtio_load(VIRTIO_DEVICE(opaque), f, 1);
 }
 
 static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
@@ -120,7 +115,6 @@ static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
     v->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
     virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, v->config_size);
     v->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
-    register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, v);
 
 out:
     return;
@@ -133,7 +127,6 @@ static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
     V9fsState *s = &v->state;
 
     virtio_cleanup(vdev);
-    unregister_savevm(dev, "virtio-9p", v);
     v9fs_device_unrealize_common(s, errp);
 }
 
@@ -175,6 +168,8 @@ void virtio_init_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov,
 
 /* virtio-9p device */
 
+VMSTATE_VIRTIO_DEVICE(9p, 1, virtio_9p_load, virtio_vmstate_save);
+
 static Property virtio_9p_properties[] = {
     DEFINE_PROP_STRING("mount_tag", V9fsVirtioState, state.fsconf.tag),
     DEFINE_PROP_STRING("fsdev", V9fsVirtioState, state.fsconf.fsdev_id),
@@ -187,6 +182,7 @@ static void virtio_9p_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     dc->props = virtio_9p_properties;
+    dc->vmsd = &vmstate_virtio_9p;
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     vdc->realize = virtio_9p_device_realize;
     vdc->unrealize = virtio_9p_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 53/57] virtio-input: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/input/virtio-input.c | 26 ++++++--------------------
 1 file changed, 6 insertions(+), 20 deletions(-)

diff --git a/hw/input/virtio-input.c b/hw/input/virtio-input.c
index edf6990..a87fd68 100644
--- a/hw/input/virtio-input.c
+++ b/hw/input/virtio-input.c
@@ -217,26 +217,14 @@ static void virtio_input_reset(VirtIODevice *vdev)
     }
 }
 
-static void virtio_input_save(QEMUFile *f, void *opaque)
-{
-    VirtIOInput *vinput = opaque;
-    VirtIODevice *vdev = VIRTIO_DEVICE(vinput);
-
-    virtio_save(vdev, f);
-}
-
-static int virtio_input_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_input_load(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIOInput *vinput = opaque;
     VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vinput);
     VirtIODevice *vdev = VIRTIO_DEVICE(vinput);
     int ret;
 
-    if (version_id != VIRTIO_INPUT_VM_VERSION) {
-        return -EINVAL;
-    }
-
-    ret = virtio_load(vdev, f, version_id);
+    ret = virtio_load(vdev, f, VIRTIO_INPUT_VM_VERSION);
     if (ret) {
         return ret;
     }
@@ -280,20 +268,14 @@ static void virtio_input_device_realize(DeviceState *dev, Error **errp)
                 vinput->cfg_size);
     vinput->evt = virtio_add_queue(vdev, 64, virtio_input_handle_evt);
     vinput->sts = virtio_add_queue(vdev, 64, virtio_input_handle_sts);
-
-    register_savevm(dev, "virtio-input", -1, VIRTIO_INPUT_VM_VERSION,
-                    virtio_input_save, virtio_input_load, vinput);
 }
 
 static void virtio_input_device_unrealize(DeviceState *dev, Error **errp)
 {
     VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev);
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
-    VirtIOInput *vinput = VIRTIO_INPUT(dev);
     Error *local_err = NULL;
 
-    unregister_savevm(dev, "virtio-input", vinput);
-
     if (vic->unrealize) {
         vic->unrealize(dev, &local_err);
         if (local_err) {
@@ -304,6 +286,9 @@ static void virtio_input_device_unrealize(DeviceState *dev, Error **errp)
     virtio_cleanup(vdev);
 }
 
+VMSTATE_VIRTIO_DEVICE(input, VIRTIO_INPUT_VM_VERSION, virtio_input_load,
+                      virtio_vmstate_save);
+
 static Property virtio_input_properties[] = {
     DEFINE_PROP_STRING("serial", VirtIOInput, serial),
     DEFINE_PROP_END_OF_LIST(),
@@ -315,6 +300,7 @@ static void virtio_input_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     dc->props          = virtio_input_properties;
+    dc->vmsd           = &vmstate_virtio_input;
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
     vdc->realize      = virtio_input_device_realize;
     vdc->unrealize    = virtio_input_device_unrealize;
-- 
MST

[Qemu-devel] [PULL v5 54/57] virtio-gpu: Use migrate_add_blocker for virgl migration blocking

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

virgl conditionally registers a vmstate as unmigratable when virgl
is enabled; instead use the migrate_add_blocker mechanism.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/virtio/virtio-gpu.h |  2 ++
 hw/display/virtio-gpu.c        | 19 +++++++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 325354f..e4f424a 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -118,6 +118,8 @@ typedef struct VirtIOGPU {
         uint32_t req_3d;
         uint32_t bytes_3d;
     } stats;
+
+    Error *migration_blocker;
 } VirtIOGPU;
 
 extern const GraphicHwOps virtio_gpu_ops;
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 929c3c8..cc87eb7 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -19,6 +19,7 @@
 #include "hw/virtio/virtio.h"
 #include "hw/virtio/virtio-gpu.h"
 #include "hw/virtio/virtio-bus.h"
+#include "migration/migration.h"
 #include "qemu/log.h"
 #include "qapi/error.h"
 
@@ -986,11 +987,6 @@ static const VMStateDescription vmstate_virtio_gpu_scanouts = {
     },
 };
 
-static const VMStateDescription vmstate_virtio_gpu_unmigratable = {
-    .name = "virtio-gpu-with-virgl",
-    .unmigratable = 1,
-};
-
 static void virtio_gpu_save(QEMUFile *f, void *opaque)
 {
     VirtIOGPU *g = opaque;
@@ -1169,13 +1165,23 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
     }
 
     if (virtio_gpu_virgl_enabled(g->conf)) {
-        vmstate_register(qdev, -1, &vmstate_virtio_gpu_unmigratable, g);
+        error_setg(&g->migration_blocker, "virgl is not yet migratable");
+        migrate_add_blocker(g->migration_blocker);
     } else {
         register_savevm(qdev, "virtio-gpu", -1, VIRTIO_GPU_VM_VERSION,
                         virtio_gpu_save, virtio_gpu_load, g);
     }
 }
 
+static void virtio_gpu_device_unrealize(DeviceState *qdev, Error **errp)
+{
+    VirtIOGPU *g = VIRTIO_GPU(qdev);
+    if (g->migration_blocker) {
+        migrate_del_blocker(g->migration_blocker);
+        error_free(g->migration_blocker);
+    }
+}
+
 static void virtio_gpu_instance_init(Object *obj)
 {
 }
@@ -1237,6 +1243,7 @@ static void virtio_gpu_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 
     vdc->realize = virtio_gpu_device_realize;
+    vdc->unrealize = virtio_gpu_device_unrealize;
     vdc->get_config = virtio_gpu_get_config;
     vdc->set_config = virtio_gpu_set_config;
     vdc->get_features = virtio_gpu_get_features;
-- 
MST

[Qemu-devel] [PULL v5 55/57] virtio-gpu: Wrap in vmstate

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Forcibly convert it to a vmstate wrapper;  proper conversion
comes later.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/virtio-gpu.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index cc87eb7..7fe6ed8 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -987,7 +987,7 @@ static const VMStateDescription vmstate_virtio_gpu_scanouts = {
     },
 };
 
-static void virtio_gpu_save(QEMUFile *f, void *opaque)
+static void virtio_gpu_save(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIOGPU *g = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(g);
@@ -1017,7 +1017,7 @@ static void virtio_gpu_save(QEMUFile *f, void *opaque)
     vmstate_save_state(f, &vmstate_virtio_gpu_scanouts, g, NULL);
 }
 
-static int virtio_gpu_load(QEMUFile *f, void *opaque, int version_id)
+static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size)
 {
     VirtIOGPU *g = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(g);
@@ -1026,11 +1026,7 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, int version_id)
     uint32_t resource_id, pformat;
     int i, ret;
 
-    if (version_id != VIRTIO_GPU_VM_VERSION) {
-        return -EINVAL;
-    }
-
-    ret = virtio_load(vdev, f, version_id);
+    ret = virtio_load(vdev, f, VIRTIO_GPU_VM_VERSION);
     if (ret) {
         return ret;
     }
@@ -1167,9 +1163,6 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
     if (virtio_gpu_virgl_enabled(g->conf)) {
         error_setg(&g->migration_blocker, "virgl is not yet migratable");
         migrate_add_blocker(g->migration_blocker);
-    } else {
-        register_savevm(qdev, "virtio-gpu", -1, VIRTIO_GPU_VM_VERSION,
-                        virtio_gpu_save, virtio_gpu_load, g);
     }
 }
 
@@ -1226,6 +1219,9 @@ static void virtio_gpu_reset(VirtIODevice *vdev)
 #endif
 }
 
+VMSTATE_VIRTIO_DEVICE(gpu, VIRTIO_GPU_VM_VERSION, virtio_gpu_load,
+                      virtio_gpu_save);
+
 static Property virtio_gpu_properties[] = {
     DEFINE_PROP_UINT32("max_outputs", VirtIOGPU, conf.max_outputs, 1),
 #ifdef CONFIG_VIRGL
@@ -1252,6 +1248,7 @@ static void virtio_gpu_class_init(ObjectClass *klass, void *data)
     vdc->reset = virtio_gpu_reset;
 
     dc->props = virtio_gpu_properties;
+    dc->vmsd = &vmstate_virtio_gpu;
 }
 
 static const TypeInfo virtio_gpu_info = {
-- 
MST

[Qemu-devel] [PULL v5 56/57] virtio: Update migration docs

[Michael S. Tsirkin]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Remove references to register_savevm.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 docs/virtio-migration.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/virtio-migration.txt b/docs/virtio-migration.txt
index cf66458..98a6b0f 100644
--- a/docs/virtio-migration.txt
+++ b/docs/virtio-migration.txt
@@ -28,7 +28,8 @@ virtio core               virtio transport          virtio device
 -----------               ----------------          -------------
 
                                                     save() function registered
-                                                    via register_savevm()
+                                                    via VMState wrapper on
+                                                    device class
 virtio_save()                                       <----------
              ------>      save_config()
                           - save proxy device
@@ -63,7 +64,8 @@ virtio core               virtio transport          virtio device
 -----------               ----------------          -------------
 
                                                     load() function registered
-                                                    via register_savevm()
+                                                    via VMState wrapper on
+                                                    device class
 virtio_load()                                       <----------
              ------>      load_config()
                           - load proxy device
-- 
MST

[Qemu-devel] [PULL v5 57/57] intel_iommu: avoid unnamed fields

[Michael S. Tsirkin]

Also avoid unnamed fields for portability.
Also, rename VTD_IRTE to VTD_IR_TableEntry for coding
style compliance.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/intel_iommu.h |  8 ++++----
 hw/i386/intel_iommu.c         | 42 +++++++++++++++++++++---------------------
 2 files changed, 25 insertions(+), 25 deletions(-)

diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 2eba7ed..a42dbd7 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -59,7 +59,7 @@ typedef struct IntelIOMMUState IntelIOMMUState;
 typedef struct VTDAddressSpace VTDAddressSpace;
 typedef struct VTDIOTLBEntry VTDIOTLBEntry;
 typedef struct VTDBus VTDBus;
-typedef union VTD_IRTE VTD_IRTE;
+typedef union VTD_IR_TableEntry VTD_IR_TableEntry;
 typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress;
 typedef struct VTDIrq VTDIrq;
 typedef struct VTD_MSIMessage VTD_MSIMessage;
@@ -120,7 +120,7 @@ enum {
 };
 
 /* Interrupt Remapping Table Entry Definition */
-union VTD_IRTE {
+union VTD_IR_TableEntry {
     struct {
 #ifdef HOST_WORDS_BIGENDIAN
         uint32_t dest_id:32;         /* Destination ID */
@@ -159,7 +159,7 @@ union VTD_IRTE {
         uint64_t sid_vtype:2;        /* Source-ID Validation Type */
         uint64_t __reserved_2:44;    /* Reserved 2 */
 #endif
-    } QEMU_PACKED;
+    } QEMU_PACKED irte;
     uint64_t data[2];
 };
 
@@ -184,7 +184,7 @@ union VTD_IR_MSIAddress {
         uint32_t index_l:15;         /* Interrupt index bit 14-0 */
         uint32_t __head:12;          /* Should always be: 0x0fee */
 #endif
-    } QEMU_PACKED;
+    } QEMU_PACKED addr;
     uint32_t data;
 };
 
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 0e139d1..28c31a2 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2010,7 +2010,7 @@ static Property vtd_properties[] = {
 
 /* Read IRTE entry with specific index */
 static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
-                        VTD_IRTE *entry, uint16_t sid)
+                        VTD_IR_TableEntry *entry, uint16_t sid)
 {
     static const uint16_t vtd_svt_mask[VTD_SQ_MAX] = \
         {0xffff, 0xfffb, 0xfff9, 0xfff8};
@@ -2026,7 +2026,7 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
         return -VTD_FR_IR_ROOT_INVAL;
     }
 
-    if (!entry->present) {
+    if (!entry->irte.present) {
         VTD_DPRINTF(GENERAL, "error: present flag not set in IRTE"
                     " entry index %u value 0x%"PRIx64 " 0x%"PRIx64,
                     index, le64_to_cpu(entry->data[1]),
@@ -2034,8 +2034,8 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
         return -VTD_FR_IR_ENTRY_P;
     }
 
-    if (entry->__reserved_0 || entry->__reserved_1 || \
-        entry->__reserved_2) {
+    if (entry->irte.__reserved_0 || entry->irte.__reserved_1 ||
+        entry->irte.__reserved_2) {
         VTD_DPRINTF(GENERAL, "error: IRTE entry index %"PRIu16
                     " reserved fields non-zero: 0x%"PRIx64 " 0x%"PRIx64,
                     index, le64_to_cpu(entry->data[1]),
@@ -2045,14 +2045,14 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
 
     if (sid != X86_IOMMU_SID_INVALID) {
         /* Validate IRTE SID */
-        source_id = le32_to_cpu(entry->source_id);
-        switch (entry->sid_vtype) {
+        source_id = le32_to_cpu(entry->irte.source_id);
+        switch (entry->irte.sid_vtype) {
         case VTD_SVT_NONE:
             VTD_DPRINTF(IR, "No SID validation for IRTE index %d", index);
             break;
 
         case VTD_SVT_ALL:
-            mask = vtd_svt_mask[entry->sid_q];
+            mask = vtd_svt_mask[entry->irte.sid_q];
             if ((source_id & mask) != (sid & mask)) {
                 VTD_DPRINTF(GENERAL, "SID validation for IRTE index "
                             "%d failed (reqid 0x%04x sid 0x%04x)", index,
@@ -2075,7 +2075,7 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
 
         default:
             VTD_DPRINTF(GENERAL, "Invalid SVT bits (0x%x) in IRTE index "
-                        "%d", entry->sid_vtype, index);
+                        "%d", entry->irte.sid_vtype, index);
             /* Take this as verification failure. */
             return -VTD_FR_IR_SID_ERR;
             break;
@@ -2089,7 +2089,7 @@ static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index,
 static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index,
                              VTDIrq *irq, uint16_t sid)
 {
-    VTD_IRTE irte = {};
+    VTD_IR_TableEntry irte = {};
     int ret = 0;
 
     ret = vtd_irte_get(iommu, index, &irte, sid);
@@ -2097,18 +2097,18 @@ static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index,
         return ret;
     }
 
-    irq->trigger_mode = irte.trigger_mode;
-    irq->vector = irte.vector;
-    irq->delivery_mode = irte.delivery_mode;
-    irq->dest = le32_to_cpu(irte.dest_id);
+    irq->trigger_mode = irte.irte.trigger_mode;
+    irq->vector = irte.irte.vector;
+    irq->delivery_mode = irte.irte.delivery_mode;
+    irq->dest = le32_to_cpu(irte.irte.dest_id);
     if (!iommu->intr_eime) {
 #define  VTD_IR_APIC_DEST_MASK         (0xff00ULL)
 #define  VTD_IR_APIC_DEST_SHIFT        (8)
         irq->dest = (irq->dest & VTD_IR_APIC_DEST_MASK) >>
             VTD_IR_APIC_DEST_SHIFT;
     }
-    irq->dest_mode = irte.dest_mode;
-    irq->redir_hint = irte.redir_hint;
+    irq->dest_mode = irte.irte.dest_mode;
+    irq->redir_hint = irte.irte.redir_hint;
 
     VTD_DPRINTF(IR, "remapping interrupt index %d: trig:%u,vec:%u,"
                 "deliver:%u,dest:%u,dest_mode:%u", index,
@@ -2167,23 +2167,23 @@ static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
     }
 
     addr.data = origin->address & VTD_MSI_ADDR_LO_MASK;
-    if (le16_to_cpu(addr.__head) != 0xfee) {
+    if (le16_to_cpu(addr.addr.__head) != 0xfee) {
         VTD_DPRINTF(GENERAL, "error: MSI addr low 32 bits invalid: "
                     "0x%"PRIx32, addr.data);
         return -VTD_FR_IR_REQ_RSVD;
     }
 
     /* This is compatible mode. */
-    if (addr.int_mode != VTD_IR_INT_FORMAT_REMAP) {
+    if (addr.addr.int_mode != VTD_IR_INT_FORMAT_REMAP) {
         goto do_not_translate;
     }
 
-    index = addr.index_h << 15 | le16_to_cpu(addr.index_l);
+    index = addr.addr.index_h << 15 | le16_to_cpu(addr.addr.index_l);
 
 #define  VTD_IR_MSI_DATA_SUBHANDLE       (0x0000ffff)
 #define  VTD_IR_MSI_DATA_RESERVED        (0xffff0000)
 
-    if (addr.sub_valid) {
+    if (addr.addr.sub_valid) {
         /* See VT-d spec 5.1.2.2 and 5.1.3 on subhandle */
         index += origin->data & VTD_IR_MSI_DATA_SUBHANDLE;
     }
@@ -2193,7 +2193,7 @@ static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
         return ret;
     }
 
-    if (addr.sub_valid) {
+    if (addr.addr.sub_valid) {
         VTD_DPRINTF(IR, "received MSI interrupt");
         if (origin->data & VTD_IR_MSI_DATA_RESERVED) {
             VTD_DPRINTF(GENERAL, "error: MSI data bits non-zero for "
@@ -2217,7 +2217,7 @@ static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu,
      * We'd better keep the last two bits, assuming that guest OS
      * might modify it. Keep it does not hurt after all.
      */
-    irq.msi_addr_last_bits = addr.__not_care;
+    irq.msi_addr_last_bits = addr.addr.__not_care;
 
     /* Translate VTDIrq to MSI message */
     vtd_generate_msi_message(&irq, translated);
-- 
MST

Re: [Qemu-devel] [PULL v5 00/57] pc, pci, virtio: new features, cleanups, fixes

[Peter Maydell]

On 21 July 2016 at 18:50, Michael S. Tsirkin <mst@redhat.com> wrote:
> The following changes since commit 5d3217340adcb6c4f0e4af5d2b865331eb2ff63d:
>
>   disas: Fix ATTRIBUTE_UNUSED define clash with ALSA headers (2016-07-19 16:40:39 +0100)
>
> are available in the git repository at:
>
>   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_upstream
>
> for you to fetch changes up to bc38ee10fc26338e21c01485540f815be1f3db28:
>
>   intel_iommu: avoid unnamed fields (2016-07-21 20:44:20 +0300)
>
> ----------------------------------------------------------------
> pc, pci, virtio: new features, cleanups, fixes
>
> - interrupt remapping for intel iommus
> - a bunch of virtio cleanups
> - fixes all over the place
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Applied to master; thanks for working through all the respins.

-- PMM