[PATCH] pci-ids.rst: Add Red Hat pci-id for AMD IOMMU device

[Suravee Suthikulpanit]

The QEMU-emulated AMD IOMMU PCI device is implemented based on the AMD I/O
Virtualization Technology (IOMMU) Specification [1]. The PCI id for this
device is platform-specific.

Currently, the QEMU-emulated AMD IOMMU device is using AMD vendor id and
undefined device id.

Therefore, change the vendor id to Red Hat and request a new QEMU-specific
device id.

[1] 
https://www.amd.com/content/dam/amd/en/documents/processor-tech-docs/specifications/48882_IOMMU.pdf

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
 docs/specs/pci-ids.rst | 2 ++
 hw/i386/amd_iommu.c    | 3 ++-
 include/hw/pci/pci.h   | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/docs/specs/pci-ids.rst b/docs/specs/pci-ids.rst
index 261b0f359f..2416a70a2d 100644
--- a/docs/specs/pci-ids.rst
+++ b/docs/specs/pci-ids.rst
@@ -100,6 +100,8 @@ PCI devices (other than virtio):
   PCI UFS device (``-device ufs``)
 1b36:0014
   PCI RISC-V IOMMU device
+1b36:0015
+  PCI AMD IOMMU device (``-device amd-iommu``)
 
 All these devices are documented in :doc:`index`.
 
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index dda1a5781f..4d8564249c 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1766,7 +1766,8 @@ static void amdvi_pci_class_init(ObjectClass *klass, void 
*data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 
-    k->vendor_id = PCI_VENDOR_ID_AMD;
+    k->vendor_id = PCI_VENDOR_ID_REDHAT;
+    k->device_id = PCI_DEVICE_ID_REDHAT_AMD_IOMMU;
     k->class_id = 0x0806;
     k->realize = amdvi_pci_realize;
 
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 4002bbeebd..da44e6673d 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -117,6 +117,7 @@ extern bool pci_available;
 #define PCI_DEVICE_ID_REDHAT_ACPI_ERST   0x0012
 #define PCI_DEVICE_ID_REDHAT_UFS         0x0013
 #define PCI_DEVICE_ID_REDHAT_RISCV_IOMMU 0x0014
+#define PCI_DEVICE_ID_REDHAT_AMD_IOMMU   0x0015
 #define PCI_DEVICE_ID_REDHAT_QXL         0x0100
 
 #define FMT_PCIBUS                      PRIx64
-- 
2.34.1