[Qemu-devel] [RFC 4/4] hw/pci-host: Add AMD IOMMU emulation to q35 and PIIX

[David Kiarie <davidkiarie4@gmail.com>]

From: David <davidkiarie4@gmail.com>

Add AMD IOMMU emulation to q35 and PIIX chipsets.

Signed-off-by: David Kiarie <davidkiarie4@gmail.com>
---
 hw/pci-host/piix.c | 11 +++++++++++
 hw/pci-host/q35.c  | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 1cb25f3..348cff0 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -31,6 +31,7 @@
 #include "qemu/range.h"
 #include "hw/xen/xen.h"
 #include "hw/pci-host/pam.h"
+#include "hw/i386/amd_iommu.h"
 #include "sysemu/sysemu.h"
 #include "hw/i386/ioapic.h"
 #include "qapi/visitor.h"
@@ -292,12 +293,21 @@ static void i440fx_pcihost_realize(DeviceState *dev, Error **errp)
 {
     PCIHostState *s = PCI_HOST_BRIDGE(dev);
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+    AMDIOMMUState *iommu_state;
+    PCIDevice *iommu;
 
     sysbus_add_io(sbd, 0xcf8, &s->conf_mem);
     sysbus_init_ioports(sbd, 0xcf8, 4);
 
     sysbus_add_io(sbd, 0xcfc, &s->data_mem);
     sysbus_init_ioports(sbd, 0xcfc, 4);
+
+    /* AMD IOMMU (AMD-Vi) */
+    if(machine_amd_iommu(current_machine)){
+        iommu = pci_create_simple(s->bus, 0x20, TYPE_AMD_IOMMU_DEVICE);
+        iommu_state = AMD_IOMMU_DEVICE(iommu);
+        pci_setup_iommu(s->bus, bridge_host_amd_iommu, iommu_state);
+    }
 }
 
 static void i440fx_realize(PCIDevice *dev, Error **errp)
@@ -333,6 +343,7 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state,
     object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL);
     qdev_init_nofail(dev);
 
+
     d = pci_create_simple(b, 0, TYPE_I440FX_PCI_DEVICE);
     *pi440fx_state = I440FX_PCI_DEVICE(d);
     f = *pi440fx_state;
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index bd74094..4bb7e3f 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -30,6 +30,7 @@
 #include "hw/hw.h"
 #include "hw/pci-host/q35.h"
 #include "qapi/visitor.h"
+#include "hw/i386/amd_iommu.h"
 
 /****************************************************************************
  * Q35 host
@@ -470,6 +471,8 @@ static void mch_realize(PCIDevice *d, Error **errp)
 {
     int i;
     MCHPCIState *mch = MCH_PCI_DEVICE(d);
+    AMDIOMMUState *iommu_state;
+    PCIDevice *iommu;
 
     /* setup pci memory mapping */
     pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory,
@@ -528,6 +531,14 @@ static void mch_realize(PCIDevice *d, Error **errp)
     if (machine_iommu(current_machine)) {
         mch_init_dmar(mch);
     }
+
+    /* AMD IOMMU (AMD-Vi) */
+    if (machine_amd_iommu(current_machine)){
+        PCIBus *bus = PCI_BUS(qdev_get_parent_bus(DEVICE(mch)));
+        iommu = pci_create_simple(bus, 0x20, TYPE_AMD_IOMMU_DEVICE);
+        iommu_state = AMD_IOMMU_DEVICE(iommu);
+        pci_setup_iommu(bus, bridge_host_amd_iommu, iommu_state);
+    }
 }
 
 uint64_t mch_mcfg_base(void)
-- 
2.1.4