[Qemu-devel] [PATCH v7 15/17] hw/arm/virt: Add nvdimm hot-plug infrastructure

[Eric Auger <eric.auger@redhat.com>]

From: Kwangwoo Lee <kwangwoo.lee@sk.com>

Pre-plug and plug handlers are prepared for NVDIMM support.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Kwangwoo Lee <kwangwoo.lee@sk.com>
---
 default-configs/arm-softmmu.mak |  2 ++
 hw/arm/virt-acpi-build.c        |  6 ++++++
 hw/arm/virt.c                   | 22 ++++++++++++++++++++++
 include/hw/arm/virt.h           |  3 +++
 4 files changed, 33 insertions(+)

diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 0a78421f72..03dbebb197 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -165,3 +165,5 @@ CONFIG_HIGHBANK=y
 CONFIG_MUSICPAL=y
 CONFIG_MEM_DEVICE=y
 CONFIG_DIMM=y
+CONFIG_NVDIMM=y
+CONFIG_ACPI_NVDIMM=y
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 781eafaf5e..f086adfa82 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -784,6 +784,7 @@ static
 void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
 {
     VirtMachineClass *vmc = VIRT_MACHINE_GET_CLASS(vms);
+    MachineState *ms = MACHINE(vms);
     GArray *table_offsets;
     unsigned dsdt, xsdt;
     GArray *tables_blob = tables->table_data;
@@ -824,6 +825,11 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
         }
     }
 
+    if (vms->acpi_nvdimm_state.is_enabled) {
+        nvdimm_build_acpi(table_offsets, tables_blob, tables->linker,
+                          &vms->acpi_nvdimm_state, ms->ram_slots);
+    }
+
     if (its_class_name() && !vmc->no_its) {
         acpi_add_table(table_offsets, tables_blob);
         build_iort(tables_blob, tables->linker, vms);
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 33ad9b3f63..1896920570 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -134,6 +134,7 @@ static const MemMapEntry base_memmap[] = {
     [VIRT_GPIO] =               { 0x09030000, 0x00001000 },
     [VIRT_SECURE_UART] =        { 0x09040000, 0x00001000 },
     [VIRT_SMMU] =               { 0x09050000, 0x00020000 },
+    [VIRT_ACPI_IO] =            { 0x09070000, 0x00010000 },
     [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
     /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
     [VIRT_PLATFORM_BUS] =       { 0x0c000000, 0x02000000 },
@@ -1675,6 +1676,18 @@ static void machvirt_init(MachineState *machine)
 
     create_platform_bus(vms, pic);
 
+    if (vms->acpi_nvdimm_state.is_enabled) {
+        AcpiNVDIMMState *acpi_nvdimm_state = &vms->acpi_nvdimm_state;
+
+        acpi_nvdimm_state->dsm_io.space_id = AML_AS_SYSTEM_MEMORY;
+        acpi_nvdimm_state->dsm_io.address =
+                vms->memmap[VIRT_ACPI_IO].base + NVDIMM_ACPI_IO_BASE;
+        acpi_nvdimm_state->dsm_io.bit_width = NVDIMM_ACPI_IO_LEN << 3;
+
+        nvdimm_init_acpi_state(acpi_nvdimm_state, sysmem,
+                               vms->fw_cfg, OBJECT(vms));
+    }
+
     vms->bootinfo.ram_size = machine->ram_size;
     vms->bootinfo.kernel_filename = machine->kernel_filename;
     vms->bootinfo.kernel_cmdline = machine->kernel_cmdline;
@@ -1860,10 +1873,19 @@ static void virt_memory_plug(HotplugHandler *hotplug_dev,
                              DeviceState *dev, Error **errp)
 {
     VirtMachineState *vms = VIRT_MACHINE(hotplug_dev);
+    bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
     Error *local_err = NULL;
 
     pc_dimm_plug(PC_DIMM(dev), MACHINE(vms), &local_err);
+    if (local_err) {
+        goto out;
+    }
 
+    if (is_nvdimm) {
+        nvdimm_plug(&vms->acpi_nvdimm_state);
+    }
+
+out:
     error_propagate(errp, local_err);
 }
 
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 7798462cb0..bd9cf68311 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -37,6 +37,7 @@
 #include "hw/arm/arm.h"
 #include "sysemu/kvm.h"
 #include "hw/intc/arm_gicv3_common.h"
+#include "hw/mem/nvdimm.h"
 
 #define NUM_GICV2M_SPIS       64
 #define NUM_VIRTIO_TRANSPORTS 32
@@ -77,6 +78,7 @@ enum {
     VIRT_GPIO,
     VIRT_SECURE_UART,
     VIRT_SECURE_MEM,
+    VIRT_ACPI_IO,
     VIRT_LOWMEMMAP_LAST,
 };
 
@@ -137,6 +139,7 @@ typedef struct {
     hwaddr device_memory_base;
     hwaddr device_memory_size;
     bool extended_memmap;
+    AcpiNVDIMMState acpi_nvdimm_state;
 } VirtMachineState;
 
 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM)
-- 
2.20.1