hw/i386/amd_iommu: Move capab_offset from AMDVIState to AMDVIPCIState

The 'PCI capability offset' is a *PCI* notion. Since AMDVIPCIState
inherits PCIDevice and hold PCI-related fields, move capab_offset
from AMDVIState to AMDVIPCIState.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230313153031.86107-5-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/i386/acpi-build.c

@@ -2399,7 +2399,7 @@ build_amd_iommu(GArray *table_data, BIOSLinker *linker, const char *oem_id,
                               object_property_get_int(OBJECT(&s->pci), "addr",
                                                       &error_abort), 2);
     /* Capability offset */
-    build_append_int_noprefix(table_data, s->capab_offset, 2);
+    build_append_int_noprefix(table_data, s->pci.capab_offset, 2);
     /* IOMMU base address */
     build_append_int_noprefix(table_data, s->mmio.addr, 8);
     /* PCI Segment Group */

hw/i386/amd_iommu.c

@@ -1516,15 +1516,15 @@ static void amdvi_init(AMDVIState *s)
     pci_config_set_class(s->pci.dev.config, 0x0806);
 
     /* reset AMDVI specific capabilities, all r/o */
-    pci_set_long(s->pci.dev.config + s->capab_offset, AMDVI_CAPAB_FEATURES);
-    pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_BAR_LOW,
+    pci_set_long(s->pci.dev.config + s->pci.capab_offset, AMDVI_CAPAB_FEATURES);
+    pci_set_long(s->pci.dev.config + s->pci.capab_offset + AMDVI_CAPAB_BAR_LOW,
                  AMDVI_BASE_ADDR & ~(0xffff0000));
-    pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_BAR_HIGH,
+    pci_set_long(s->pci.dev.config + s->pci.capab_offset + AMDVI_CAPAB_BAR_HIGH,
                 (AMDVI_BASE_ADDR & ~(0xffff)) >> 16);
-    pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_RANGE,
+    pci_set_long(s->pci.dev.config + s->pci.capab_offset + AMDVI_CAPAB_RANGE,
                  0xff000000);
-    pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_MISC, 0);
-    pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_MISC,
+    pci_set_long(s->pci.dev.config + s->pci.capab_offset + AMDVI_CAPAB_MISC, 0);
+    pci_set_long(s->pci.dev.config + s->pci.capab_offset + AMDVI_CAPAB_MISC,
             AMDVI_MAX_PH_ADDR | AMDVI_MAX_GVA_ADDR | AMDVI_MAX_VA_ADDR);
 }
 
@@ -1557,7 +1557,7 @@ static void amdvi_sysbus_realize(DeviceState *dev, Error **errp)
     if (ret < 0) {
         return;
     }
-    s->capab_offset = ret;
+    s->pci.capab_offset = ret;
 
     ret = pci_add_capability(&s->pci.dev, PCI_CAP_ID_MSI, 0,
                              AMDVI_CAPAB_REG_SIZE, errp);

hw/i386/amd_iommu.h

@@ -308,6 +308,7 @@ typedef struct AMDVIAddressSpace AMDVIAddressSpace;
 /* functions to steal PCI config space */
 typedef struct AMDVIPCIState {
     PCIDevice dev;               /* The PCI device itself        */
+    uint32_t capab_offset;       /* capability offset pointer    */
 } AMDVIPCIState;
 
 struct AMDVIState {
@@ -315,7 +316,6 @@ struct AMDVIState {
     AMDVIPCIState pci;          /* IOMMU PCI device             */
 
     uint32_t version;
-    uint32_t capab_offset;       /* capability offset pointer    */
 
     uint64_t mmio_addr;