summary refs log tree commit diff stats
path: root/hw/vfio/pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/vfio/pci.c')
-rw-r--r--hw/vfio/pci.c259
1 files changed, 159 insertions, 100 deletions
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 6908bcc0d3..a1bfdfe375 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -241,7 +241,7 @@ static void vfio_intx_update(VFIOPCIDevice *vdev, PCIINTxRoute *route)
 
 static void vfio_intx_routing_notifier(PCIDevice *pdev)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
     PCIINTxRoute route;
 
     if (vdev->interrupt != VFIO_INT_INTx) {
@@ -381,7 +381,7 @@ static void vfio_msi_interrupt(void *opaque)
 static int vfio_enable_msix_no_vec(VFIOPCIDevice *vdev)
 {
     g_autofree struct vfio_irq_set *irq_set = NULL;
-    int ret = 0, argsz;
+    int argsz;
     int32_t *fd;
 
     argsz = sizeof(*irq_set) + sizeof(*fd);
@@ -396,9 +396,7 @@ static int vfio_enable_msix_no_vec(VFIOPCIDevice *vdev)
     fd = (int32_t *)&irq_set->data;
     *fd = -1;
 
-    ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
-    return ret;
+    return vdev->vbasedev.io_ops->set_irqs(&vdev->vbasedev, irq_set);
 }
 
 static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix)
@@ -455,7 +453,7 @@ static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix)
         fds[i] = fd;
     }
 
-    ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
+    ret = vdev->vbasedev.io_ops->set_irqs(&vdev->vbasedev, irq_set);
 
     g_free(irq_set);
 
@@ -516,7 +514,7 @@ static void vfio_update_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage msg,
 static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
                                    MSIMessage *msg, IOHandler *handler)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
     VFIOMSIVector *vector;
     int ret;
     bool resizing = !!(vdev->nr_vectors < nr + 1);
@@ -581,7 +579,8 @@ static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
             vfio_device_irq_disable(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
             ret = vfio_enable_vectors(vdev, true);
             if (ret) {
-                error_report("vfio: failed to enable vectors, %d", ret);
+                error_report("vfio: failed to enable vectors, %s",
+                             strerror(-ret));
             }
         } else {
             Error *err = NULL;
@@ -621,7 +620,7 @@ static int vfio_msix_vector_use(PCIDevice *pdev,
 
 static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
     VFIOMSIVector *vector = &vdev->msi_vectors[nr];
 
     trace_vfio_msix_vector_release(vdev->vbasedev.name, nr);
@@ -695,7 +694,8 @@ static void vfio_msix_enable(VFIOPCIDevice *vdev)
     if (vdev->nr_vectors) {
         ret = vfio_enable_vectors(vdev, true);
         if (ret) {
-            error_report("vfio: failed to enable vectors, %d", ret);
+            error_report("vfio: failed to enable vectors, %s",
+                         strerror(-ret));
         }
     } else {
         /*
@@ -712,7 +712,8 @@ static void vfio_msix_enable(VFIOPCIDevice *vdev)
          */
         ret = vfio_enable_msix_no_vec(vdev);
         if (ret) {
-            error_report("vfio: failed to enable MSI-X, %d", ret);
+            error_report("vfio: failed to enable MSI-X, %s",
+                         strerror(-ret));
         }
     }
 
@@ -765,7 +766,8 @@ retry:
     ret = vfio_enable_vectors(vdev, false);
     if (ret) {
         if (ret < 0) {
-            error_report("vfio: Error: Failed to setup MSI fds: %m");
+            error_report("vfio: Error: Failed to setup MSI fds: %s",
+                         strerror(-ret));
         } else {
             error_report("vfio: Error: Failed to enable %d "
                          "MSI vectors, retry with %d", vdev->nr_vectors, ret);
@@ -881,18 +883,22 @@ static void vfio_update_msi(VFIOPCIDevice *vdev)
 
 static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
 {
-    g_autofree struct vfio_region_info *reg_info = NULL;
+    VFIODevice *vbasedev = &vdev->vbasedev;
+    struct vfio_region_info *reg_info = NULL;
     uint64_t size;
     off_t off = 0;
     ssize_t bytes;
+    int ret;
 
-    if (vfio_device_get_region_info(&vdev->vbasedev,
-                                    VFIO_PCI_ROM_REGION_INDEX, &reg_info)) {
-        error_report("vfio: Error getting ROM info: %m");
+    ret = vfio_device_get_region_info(vbasedev, VFIO_PCI_ROM_REGION_INDEX,
+                                      &reg_info);
+
+    if (ret != 0) {
+        error_report("vfio: Error getting ROM info: %s", strerror(-ret));
         return;
     }
 
-    trace_vfio_pci_load_rom(vdev->vbasedev.name, (unsigned long)reg_info->size,
+    trace_vfio_pci_load_rom(vbasedev->name, (unsigned long)reg_info->size,
                             (unsigned long)reg_info->offset,
                             (unsigned long)reg_info->flags);
 
@@ -901,8 +907,7 @@ static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
 
     if (!vdev->rom_size) {
         vdev->rom_read_failed = true;
-        error_report("vfio-pci: Cannot read device rom at "
-                    "%s", vdev->vbasedev.name);
+        error_report("vfio-pci: Cannot read device rom at %s", vbasedev->name);
         error_printf("Device option ROM contents are probably invalid "
                     "(check dmesg).\nSkip option ROM probe with rombar=0, "
                     "or load from file with romfile=\n");
@@ -913,18 +918,22 @@ static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
     memset(vdev->rom, 0xff, size);
 
     while (size) {
-        bytes = pread(vdev->vbasedev.fd, vdev->rom + off,
-                      size, vdev->rom_offset + off);
+        bytes = vbasedev->io_ops->region_read(vbasedev,
+                                              VFIO_PCI_ROM_REGION_INDEX,
+                                              off, size, vdev->rom + off);
+
         if (bytes == 0) {
             break;
         } else if (bytes > 0) {
             off += bytes;
             size -= bytes;
         } else {
-            if (errno == EINTR || errno == EAGAIN) {
+            if (bytes == -EINTR || bytes == -EAGAIN) {
                 continue;
             }
-            error_report("vfio: Error reading device ROM: %m");
+            error_report("vfio: Error reading device ROM: %s",
+                         strreaderror(bytes));
+
             break;
         }
     }
@@ -960,6 +969,24 @@ static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
     }
 }
 
+/* "Raw" read of underlying config space. */
+static int vfio_pci_config_space_read(VFIOPCIDevice *vdev, off_t offset,
+                                      uint32_t size, void *data)
+{
+    return vdev->vbasedev.io_ops->region_read(&vdev->vbasedev,
+                                              VFIO_PCI_CONFIG_REGION_INDEX,
+                                              offset, size, data);
+}
+
+/* "Raw" write of underlying config space. */
+static int vfio_pci_config_space_write(VFIOPCIDevice *vdev, off_t offset,
+                                       uint32_t size, void *data)
+{
+    return vdev->vbasedev.io_ops->region_write(&vdev->vbasedev,
+                                               VFIO_PCI_CONFIG_REGION_INDEX,
+                                               offset, size, data);
+}
+
 static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
 {
     VFIOPCIDevice *vdev = opaque;
@@ -1012,10 +1039,9 @@ static const MemoryRegionOps vfio_rom_ops = {
 
 static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
 {
+    VFIODevice *vbasedev = &vdev->vbasedev;
     uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
-    off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
     char *name;
-    int fd = vdev->vbasedev.fd;
 
     if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
         /* Since pci handles romfile, just print a message and return */
@@ -1032,11 +1058,12 @@ static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
      * Use the same size ROM BAR as the physical device.  The contents
      * will get filled in later when the guest tries to read it.
      */
-    if (pread(fd, &orig, 4, offset) != 4 ||
-        pwrite(fd, &size, 4, offset) != 4 ||
-        pread(fd, &size, 4, offset) != 4 ||
-        pwrite(fd, &orig, 4, offset) != 4) {
-        error_report("%s(%s) failed: %m", __func__, vdev->vbasedev.name);
+    if (vfio_pci_config_space_read(vdev, PCI_ROM_ADDRESS, 4, &orig) != 4 ||
+        vfio_pci_config_space_write(vdev, PCI_ROM_ADDRESS, 4, &size) != 4 ||
+        vfio_pci_config_space_read(vdev, PCI_ROM_ADDRESS, 4, &size) != 4 ||
+        vfio_pci_config_space_write(vdev, PCI_ROM_ADDRESS, 4, &orig) != 4) {
+
+        error_report("%s(%s) ROM access failed", __func__, vbasedev->name);
         return;
     }
 
@@ -1169,7 +1196,7 @@ static const MemoryRegionOps vfio_vga_ops = {
  */
 static void vfio_sub_page_bar_update_mapping(PCIDevice *pdev, int bar)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
     VFIORegion *region = &vdev->bars[bar].region;
     MemoryRegion *mmap_mr, *region_mr, *base_mr;
     PCIIORegion *r;
@@ -1215,7 +1242,8 @@ static void vfio_sub_page_bar_update_mapping(PCIDevice *pdev, int bar)
  */
 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
+    VFIODevice *vbasedev = &vdev->vbasedev;
     uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val;
 
     memcpy(&emu_bits, vdev->emulated_config_bits + addr, len);
@@ -1228,12 +1256,12 @@ uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
     if (~emu_bits & (0xffffffffU >> (32 - len * 8))) {
         ssize_t ret;
 
-        ret = pread(vdev->vbasedev.fd, &phys_val, len,
-                    vdev->config_offset + addr);
+        ret = vfio_pci_config_space_read(vdev, addr, len, &phys_val);
         if (ret != len) {
-            error_report("%s(%s, 0x%x, 0x%x) failed: %m",
-                         __func__, vdev->vbasedev.name, addr, len);
-            return -errno;
+            error_report("%s(%s, 0x%x, 0x%x) failed: %s",
+                         __func__, vbasedev->name, addr, len,
+                         strreaderror(ret));
+            return -1;
         }
         phys_val = le32_to_cpu(phys_val);
     }
@@ -1248,16 +1276,19 @@ uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
 void vfio_pci_write_config(PCIDevice *pdev,
                            uint32_t addr, uint32_t val, int len)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
+    VFIODevice *vbasedev = &vdev->vbasedev;
     uint32_t val_le = cpu_to_le32(val);
+    int ret;
 
     trace_vfio_pci_write_config(vdev->vbasedev.name, addr, val, len);
 
     /* Write everything to VFIO, let it filter out what we can't write */
-    if (pwrite(vdev->vbasedev.fd, &val_le, len, vdev->config_offset + addr)
-                != len) {
-        error_report("%s(%s, 0x%x, 0x%x, 0x%x) failed: %m",
-                     __func__, vdev->vbasedev.name, addr, val, len);
+    ret = vfio_pci_config_space_write(vdev, addr, len, &val_le);
+    if (ret != len) {
+        error_report("%s(%s, 0x%x, 0x%x, 0x%x) failed: %s",
+                     __func__, vbasedev->name, addr, val, len,
+                    strwriteerror(ret));
     }
 
     /* MSI/MSI-X Enabling/Disabling */
@@ -1345,9 +1376,11 @@ static bool vfio_msi_setup(VFIOPCIDevice *vdev, int pos, Error **errp)
     int ret, entries;
     Error *err = NULL;
 
-    if (pread(vdev->vbasedev.fd, &ctrl, sizeof(ctrl),
-              vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
-        error_setg_errno(errp, errno, "failed reading MSI PCI_CAP_FLAGS");
+    ret = vfio_pci_config_space_read(vdev, pos + PCI_CAP_FLAGS,
+                                     sizeof(ctrl), &ctrl);
+    if (ret != sizeof(ctrl)) {
+        error_setg(errp, "failed reading MSI PCI_CAP_FLAGS: %s",
+                   strreaderror(ret));
         return false;
     }
     ctrl = le16_to_cpu(ctrl);
@@ -1554,31 +1587,35 @@ static bool vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
     uint8_t pos;
     uint16_t ctrl;
     uint32_t table, pba;
-    int ret, fd = vdev->vbasedev.fd;
-    struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info),
-                                      .index = VFIO_PCI_MSIX_IRQ_INDEX };
+    struct vfio_irq_info irq_info;
     VFIOMSIXInfo *msix;
+    int ret;
 
     pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
     if (!pos) {
         return true;
     }
 
-    if (pread(fd, &ctrl, sizeof(ctrl),
-              vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) {
-        error_setg_errno(errp, errno, "failed to read PCI MSIX FLAGS");
+    ret = vfio_pci_config_space_read(vdev, pos + PCI_MSIX_FLAGS,
+                                     sizeof(ctrl), &ctrl);
+    if (ret != sizeof(ctrl)) {
+        error_setg(errp, "failed to read PCI MSIX FLAGS: %s",
+                   strreaderror(ret));
         return false;
     }
 
-    if (pread(fd, &table, sizeof(table),
-              vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
-        error_setg_errno(errp, errno, "failed to read PCI MSIX TABLE");
+    ret = vfio_pci_config_space_read(vdev, pos + PCI_MSIX_TABLE,
+                                     sizeof(table), &table);
+    if (ret != sizeof(table)) {
+        error_setg(errp, "failed to read PCI MSIX TABLE: %s",
+                   strreaderror(ret));
         return false;
     }
 
-    if (pread(fd, &pba, sizeof(pba),
-              vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
-        error_setg_errno(errp, errno, "failed to read PCI MSIX PBA");
+    ret = vfio_pci_config_space_read(vdev, pos + PCI_MSIX_PBA,
+                                     sizeof(pba), &pba);
+    if (ret != sizeof(pba)) {
+        error_setg(errp, "failed to read PCI MSIX PBA: %s", strreaderror(ret));
         return false;
     }
 
@@ -1593,7 +1630,8 @@ static bool vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
     msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
     msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
 
-    ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
+    ret = vfio_device_get_irq_info(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX,
+                                   &irq_info);
     if (ret < 0) {
         error_setg_errno(errp, -ret, "failed to get MSI-X irq info");
         g_free(msix);
@@ -1737,10 +1775,10 @@ static void vfio_bar_prepare(VFIOPCIDevice *vdev, int nr)
     }
 
     /* Determine what type of BAR this is for registration */
-    ret = pread(vdev->vbasedev.fd, &pci_bar, sizeof(pci_bar),
-                vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
+    ret = vfio_pci_config_space_read(vdev, PCI_BASE_ADDRESS_0 + (4 * nr),
+                                     sizeof(pci_bar), &pci_bar);
     if (ret != sizeof(pci_bar)) {
-        error_report("vfio: Failed to read BAR %d (%m)", nr);
+        error_report("vfio: Failed to read BAR %d: %s", nr, strreaderror(ret));
         return;
     }
 
@@ -2443,21 +2481,23 @@ void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
 
 void vfio_pci_post_reset(VFIOPCIDevice *vdev)
 {
+    VFIODevice *vbasedev = &vdev->vbasedev;
     Error *err = NULL;
-    int nr;
+    int ret, nr;
 
     if (!vfio_intx_enable(vdev, &err)) {
         error_reportf_err(err, VFIO_MSG_PREFIX, vdev->vbasedev.name);
     }
 
     for (nr = 0; nr < PCI_NUM_REGIONS - 1; ++nr) {
-        off_t addr = vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr);
+        off_t addr = PCI_BASE_ADDRESS_0 + (4 * nr);
         uint32_t val = 0;
         uint32_t len = sizeof(val);
 
-        if (pwrite(vdev->vbasedev.fd, &val, len, addr) != len) {
-            error_report("%s(%s) reset bar %d failed: %m", __func__,
-                         vdev->vbasedev.name, nr);
+        ret = vfio_pci_config_space_write(vdev, addr, len, &val);
+        if (ret != len) {
+            error_report("%s(%s) reset bar %d failed: %s", __func__,
+                         vbasedev->name, nr, strwriteerror(ret));
         }
     }
 
@@ -2670,7 +2710,7 @@ static VFIODeviceOps vfio_pci_ops = {
 bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
 {
     VFIODevice *vbasedev = &vdev->vbasedev;
-    g_autofree struct vfio_region_info *reg_info = NULL;
+    struct vfio_region_info *reg_info = NULL;
     int ret;
 
     ret = vfio_device_get_region_info(vbasedev, VFIO_PCI_VGA_REGION_INDEX, &reg_info);
@@ -2735,8 +2775,8 @@ bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
 static bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
 {
     VFIODevice *vbasedev = &vdev->vbasedev;
-    g_autofree struct vfio_region_info *reg_info = NULL;
-    struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
+    struct vfio_region_info *reg_info = NULL;
+    struct vfio_irq_info irq_info;
     int i, ret = -1;
 
     /* Sanity check device */
@@ -2797,12 +2837,10 @@ static bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
         }
     }
 
-    irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
-
-    ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
+    ret = vfio_device_get_irq_info(vbasedev, VFIO_PCI_ERR_IRQ_INDEX, &irq_info);
     if (ret) {
         /* This can fail for an old kernel or legacy PCI dev */
-        trace_vfio_populate_device_get_irq_info_failure(strerror(errno));
+        trace_vfio_populate_device_get_irq_info_failure(strerror(-ret));
     } else if (irq_info.count == 1) {
         vdev->pci_aer = true;
     } else {
@@ -2911,17 +2949,18 @@ static void vfio_req_notifier_handler(void *opaque)
 
 static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
 {
-    struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info),
-                                      .index = VFIO_PCI_REQ_IRQ_INDEX };
+    struct vfio_irq_info irq_info;
     Error *err = NULL;
     int32_t fd;
+    int ret;
 
     if (!(vdev->features & VFIO_FEATURE_ENABLE_REQ)) {
         return;
     }
 
-    if (ioctl(vdev->vbasedev.fd,
-              VFIO_DEVICE_GET_IRQ_INFO, &irq_info) < 0 || irq_info.count < 1) {
+    ret = vfio_device_get_irq_info(&vdev->vbasedev, VFIO_PCI_REQ_IRQ_INDEX,
+                                   &irq_info);
+    if (ret < 0 || irq_info.count < 1) {
         return;
     }
 
@@ -3090,11 +3129,12 @@ static bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp)
 static void vfio_realize(PCIDevice *pdev, Error **errp)
 {
     ERRP_GUARD();
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
     VFIODevice *vbasedev = &vdev->vbasedev;
     int i, ret;
     char uuid[UUID_STR_LEN];
     g_autofree char *name = NULL;
+    uint32_t config_space_size;
 
     if (vbasedev->fd < 0 && !vbasedev->sysfsdev) {
         if (!(~vdev->host.domain || ~vdev->host.bus ||
@@ -3149,13 +3189,14 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
         goto error;
     }
 
+    config_space_size = MIN(pci_config_size(&vdev->pdev), vdev->config_size);
+
     /* Get a copy of config space */
-    ret = pread(vbasedev->fd, vdev->pdev.config,
-                MIN(pci_config_size(&vdev->pdev), vdev->config_size),
-                vdev->config_offset);
-    if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
-        ret = ret < 0 ? -errno : -EFAULT;
-        error_setg_errno(errp, -ret, "failed to read device config space");
+    ret = vfio_pci_config_space_read(vdev, 0, config_space_size,
+                                     vdev->pdev.config);
+    if (ret < (int)config_space_size) {
+        ret = ret < 0 ? -ret : EFAULT;
+        error_setg_errno(errp, ret, "failed to read device config space");
         goto error;
     }
 
@@ -3259,7 +3300,7 @@ error:
 
 static void vfio_instance_finalize(Object *obj)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(obj);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(obj);
 
     vfio_display_finalize(vdev);
     vfio_bars_finalize(vdev);
@@ -3277,7 +3318,7 @@ static void vfio_instance_finalize(Object *obj)
 
 static void vfio_exitfn(PCIDevice *pdev)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(pdev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(pdev);
     VFIODevice *vbasedev = &vdev->vbasedev;
 
     vfio_unregister_req_notifier(vdev);
@@ -3301,7 +3342,7 @@ static void vfio_exitfn(PCIDevice *pdev)
 
 static void vfio_pci_reset(DeviceState *dev)
 {
-    VFIOPCIDevice *vdev = VFIO_PCI(dev);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(dev);
 
     trace_vfio_pci_reset(vdev->vbasedev.name);
 
@@ -3341,7 +3382,7 @@ post_reset:
 static void vfio_instance_init(Object *obj)
 {
     PCIDevice *pci_dev = PCI_DEVICE(obj);
-    VFIOPCIDevice *vdev = VFIO_PCI(obj);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(obj);
     VFIODevice *vbasedev = &vdev->vbasedev;
 
     device_add_bootindex_property(obj, &vdev->bootindex,
@@ -3362,6 +3403,31 @@ static void vfio_instance_init(Object *obj)
     pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
 }
 
+static void vfio_pci_base_dev_class_init(ObjectClass *klass, const void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
+
+    dc->desc = "VFIO PCI base device";
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+    pdc->exit = vfio_exitfn;
+    pdc->config_read = vfio_pci_read_config;
+    pdc->config_write = vfio_pci_write_config;
+}
+
+static const TypeInfo vfio_pci_base_dev_info = {
+    .name = TYPE_VFIO_PCI_BASE,
+    .parent = TYPE_PCI_DEVICE,
+    .instance_size = 0,
+    .abstract = true,
+    .class_init = vfio_pci_base_dev_class_init,
+    .interfaces = (const InterfaceInfo[]) {
+        { INTERFACE_PCIE_DEVICE },
+        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
+        { }
+    },
+};
+
 static PropertyInfo vfio_pci_migration_multifd_transfer_prop;
 
 static const Property vfio_pci_dev_properties[] = {
@@ -3385,7 +3451,7 @@ static const Property vfio_pci_dev_properties[] = {
     DEFINE_PROP_BIT("x-req", VFIOPCIDevice, features,
                     VFIO_FEATURE_ENABLE_REQ_BIT, true),
     DEFINE_PROP_BIT("x-igd-opregion", VFIOPCIDevice, features,
-                    VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT, false),
+                    VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT, true),
     DEFINE_PROP_BIT("x-igd-lpc", VFIOPCIDevice, features,
                     VFIO_FEATURE_ENABLE_IGD_LPC_BIT, false),
     DEFINE_PROP_ON_OFF_AUTO("x-igd-legacy-mode", VFIOPCIDevice,
@@ -3432,7 +3498,8 @@ static const Property vfio_pci_dev_properties[] = {
 #ifdef CONFIG_IOMMUFD
 static void vfio_pci_set_fd(Object *obj, const char *str, Error **errp)
 {
-    vfio_device_set_fd(&VFIO_PCI(obj)->vbasedev, str, errp);
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(obj);
+    vfio_device_set_fd(&vdev->vbasedev, str, errp);
 }
 #endif
 
@@ -3447,11 +3514,7 @@ static void vfio_pci_dev_class_init(ObjectClass *klass, const void *data)
     object_class_property_add_str(klass, "fd", NULL, vfio_pci_set_fd);
 #endif
     dc->desc = "VFIO-based PCI device assignment";
-    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     pdc->realize = vfio_realize;
-    pdc->exit = vfio_exitfn;
-    pdc->config_read = vfio_pci_read_config;
-    pdc->config_write = vfio_pci_write_config;
 
     object_class_property_set_description(klass, /* 1.3 */
                                           "host",
@@ -3576,16 +3639,11 @@ static void vfio_pci_dev_class_init(ObjectClass *klass, const void *data)
 
 static const TypeInfo vfio_pci_dev_info = {
     .name = TYPE_VFIO_PCI,
-    .parent = TYPE_PCI_DEVICE,
+    .parent = TYPE_VFIO_PCI_BASE,
     .instance_size = sizeof(VFIOPCIDevice),
     .class_init = vfio_pci_dev_class_init,
     .instance_init = vfio_instance_init,
     .instance_finalize = vfio_instance_finalize,
-    .interfaces = (const InterfaceInfo[]) {
-        { INTERFACE_PCIE_DEVICE },
-        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
-        { }
-    },
 };
 
 static const Property vfio_pci_dev_nohotplug_properties[] = {
@@ -3632,6 +3690,7 @@ static void register_vfio_pci_dev_type(void)
     vfio_pci_migration_multifd_transfer_prop = qdev_prop_on_off_auto;
     vfio_pci_migration_multifd_transfer_prop.realized_set_allowed = true;
 
+    type_register_static(&vfio_pci_base_dev_info);
     type_register_static(&vfio_pci_dev_info);
     type_register_static(&vfio_pci_nohotplug_dev_info);
 }