[Qemu-devel] [V8 4/4] hw/pci-host: Emulate AMD IOMMU

[David Kiarie <davidkiarie4@gmail.com>]

Add AMD IOMMU emulation support to q35 chipset

Signed-off-by: David Kiarie <davidkiarie4@gmail.com>
---
 hw/pci-host/q35.c             | 21 +++++++++++++++++++--
 include/hw/i386/intel_iommu.h |  1 +
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 70f897e..37f8a84 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -32,6 +32,7 @@
 #include "hw/pci-host/q35.h"
 #include "qapi/error.h"
 #include "qapi/visitor.h"
+#include "hw/i386/amd_iommu.h"
 
 /****************************************************************************
  * Q35 host
@@ -448,6 +449,19 @@ static void mch_init_dmar(MCHPCIState *mch)
     pci_setup_iommu(pci_bus, q35_host_dma_iommu, mch->iommu);
 }
 
+static void mch_init_amdvi(MCHPCIState *mch)
+{
+    AMDIOMMUState *iommu_state;
+    PCIBus *bus = PCI_BUS(qdev_get_parent_bus(DEVICE(mch)));
+    PCIDevice *iommu;
+
+    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);
+}
+
 static void mch_realize(PCIDevice *d, Error **errp)
 {
     int i;
@@ -506,8 +520,11 @@ static void mch_realize(PCIDevice *d, Error **errp)
                  mch->pci_address_space, &mch->pam_regions[i+1],
                  PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE);
     }
-    /* Intel IOMMU (VT-d) */
-    if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) {
+
+    if (object_property_get_bool(qdev_get_machine(), "iommu", NULL) &&
+        MACHINE(qdev_get_machine())->x_iommu_type) {
+        mch_init_amdvi(mch);
+    } else if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) {
         mch_init_dmar(mch);
     }
 }
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 7e511e1..5a520f3 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -28,6 +28,7 @@
 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
 #define INTEL_IOMMU_DEVICE(obj) \
      OBJECT_CHECK(IntelIOMMUState, (obj), TYPE_INTEL_IOMMU_DEVICE)
+#define INTEL_IOMMU_STR "intel"
 
 /* DMAR Hardware Unit Definition address (IOMMU unit) */
 #define Q35_HOST_BRIDGE_IOMMU_ADDR  0xfed90000ULL
-- 
2.1.4