Merge remote-tracking branch 'remotes/awilliam/tags/vfio-updates-20161017.0' into staging

VFIO updates 2016-10-17

 - Convert to realize & improve error reporting (Eric Auger)
 - RTL quirk bug fix (Thorsten Kohfeldt)
 - Skip duplicate pre/post reset (Cao jin)

# gpg: Signature made Mon 17 Oct 2016 20:42:44 BST
# gpg:                using RSA key 0x239B9B6E3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>"
# gpg:                 aka "Alex Williamson <alex@shazbot.org>"
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>"
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>"
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B  8A90 239B 9B6E 3BB0 8B22

* remotes/awilliam/tags/vfio-updates-20161017.0:
  vfio: fix duplicate function call
  vfio/pci: Fix vfio_rtl8168_quirk_data_read address offset
  vfio/pci: Handle host oversight
  vfio/pci: Remove vfio_populate_device returned value
  vfio/pci: Remove vfio_msix_early_setup returned value
  vfio/pci: Conversion to realize
  vfio/platform: Pass an error object to vfio_base_device_init
  vfio/platform: fix a wrong returned value in vfio_populate_device
  vfio/platform: Pass an error object to vfio_populate_device
  vfio: Pass an error object to vfio_get_device
  vfio: Pass an error object to vfio_get_group
  vfio: Pass an Error object to vfio_connect_container
  vfio/pci: Pass an error object to vfio_pci_igd_opregion_init
  vfio/pci: Pass an error object to vfio_add_capabilities
  vfio/pci: Pass an error object to vfio_intx_enable
  vfio/pci: Pass an error object to vfio_msix_early_setup
  vfio/pci: Pass an error object to vfio_populate_device
  vfio/pci: Pass an error object to vfio_populate_vga
  vfio/pci: Use local error object in vfio_initfn

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 157 insertions, 122 deletions

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index a5a620a0c4..65d30fdef9 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -100,7 +100,7 @@ static void vfio_intx_eoi(VFIODevice *vbasedev)
     vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
 }
 
-static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev)
+static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev, Error **errp)
 {
 #ifdef CONFIG_KVM
     struct kvm_irqfd irqfd = {
@@ -126,7 +126,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev)
 
     /* Get an eventfd for resample/unmask */
     if (event_notifier_init(&vdev->intx.unmask, 0)) {
-        error_report("vfio: Error: event_notifier_init failed eoi");
+        error_setg(errp, "event_notifier_init failed eoi");
         goto fail;
     }
 
@@ -134,7 +134,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev)
     irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask);
 
     if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
-        error_report("vfio: Error: Failed to setup resample irqfd: %m");
+        error_setg_errno(errp, errno, "failed to setup resample irqfd");
         goto fail_irqfd;
     }
 
@@ -153,7 +153,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev)
     ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
     g_free(irq_set);
     if (ret) {
-        error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
+        error_setg_errno(errp, -ret, "failed to setup INTx unmask fd");
         goto fail_vfio;
     }
 
@@ -222,6 +222,7 @@ static void vfio_intx_update(PCIDevice *pdev)
 {
     VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
     PCIINTxRoute route;
+    Error *err = NULL;
 
     if (vdev->interrupt != VFIO_INT_INTx) {
         return;
@@ -244,18 +245,22 @@ static void vfio_intx_update(PCIDevice *pdev)
         return;
     }
 
-    vfio_intx_enable_kvm(vdev);
+    vfio_intx_enable_kvm(vdev, &err);
+    if (err) {
+        error_reportf_err(err, WARN_PREFIX, vdev->vbasedev.name);
+    }
 
     /* Re-enable the interrupt in cased we missed an EOI */
     vfio_intx_eoi(&vdev->vbasedev);
 }
 
-static int vfio_intx_enable(VFIOPCIDevice *vdev)
+static int vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp)
 {
     uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
     int ret, argsz;
     struct vfio_irq_set *irq_set;
     int32_t *pfd;
+    Error *err = NULL;
 
     if (!pin) {
         return 0;
@@ -279,7 +284,7 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev)
 
     ret = event_notifier_init(&vdev->intx.interrupt, 0);
     if (ret) {
-        error_report("vfio: Error: event_notifier_init failed");
+        error_setg_errno(errp, -ret, "event_notifier_init failed");
         return ret;
     }
 
@@ -299,13 +304,16 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev)
     ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
     g_free(irq_set);
     if (ret) {
-        error_report("vfio: Error: Failed to setup INTx fd: %m");
+        error_setg_errno(errp, -ret, "failed to setup INTx fd");
         qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
         event_notifier_cleanup(&vdev->intx.interrupt);
         return -errno;
     }
 
-    vfio_intx_enable_kvm(vdev);
+    vfio_intx_enable_kvm(vdev, &err);
+    if (err) {
+        error_reportf_err(err, WARN_PREFIX, vdev->vbasedev.name);
+    }
 
     vdev->interrupt = VFIO_INT_INTx;
 
@@ -707,6 +715,7 @@ retry:
 
 static void vfio_msi_disable_common(VFIOPCIDevice *vdev)
 {
+    Error *err = NULL;
     int i;
 
     for (i = 0; i < vdev->nr_vectors; i++) {
@@ -726,7 +735,10 @@ static void vfio_msi_disable_common(VFIOPCIDevice *vdev)
     vdev->nr_vectors = 0;
     vdev->interrupt = VFIO_INT_NONE;
 
-    vfio_intx_enable(vdev);
+    vfio_intx_enable(vdev, &err);
+    if (err) {
+        error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name);
+    }
 }
 
 static void vfio_msix_disable(VFIOPCIDevice *vdev)
@@ -1168,7 +1180,7 @@ static void vfio_disable_interrupts(VFIOPCIDevice *vdev)
     }
 }
 
-static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
+static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos, Error **errp)
 {
     uint16_t ctrl;
     bool msi_64bit, msi_maskbit;
@@ -1177,6 +1189,7 @@ static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
 
     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");
         return -errno;
     }
     ctrl = le16_to_cpu(ctrl);
@@ -1192,8 +1205,8 @@ static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
         if (ret == -ENOTSUP) {
             return 0;
         }
-        error_prepend(&err, "vfio: msi_init failed: ");
-        error_report_err(err);
+        error_prepend(&err, "msi_init failed: ");
+        error_propagate(errp, err);
         return ret;
     }
     vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
@@ -1277,7 +1290,7 @@ static void vfio_pci_fixup_msix_region(VFIOPCIDevice *vdev)
  * need to first look for where the MSI-X table lives.  So we
  * unfortunately split MSI-X setup across two functions.
  */
-static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
+static void vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
 {
     uint8_t pos;
     uint16_t ctrl;
@@ -1287,22 +1300,25 @@ static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
 
     pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
     if (!pos) {
-        return 0;
+        return;
     }
 
     if (pread(fd, &ctrl, sizeof(ctrl),
               vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) {
-        return -errno;
+        error_setg_errno(errp, errno, "failed to read PCI MSIX FLAGS");
+        return;
     }
 
     if (pread(fd, &table, sizeof(table),
               vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
-        return -errno;
+        error_setg_errno(errp, errno, "failed to read PCI MSIX TABLE");
+        return;
     }
 
     if (pread(fd, &pba, sizeof(pba),
               vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
-        return -errno;
+        error_setg_errno(errp, errno, "failed to read PCI MSIX PBA");
+        return;
     }
 
     ctrl = le16_to_cpu(ctrl);
@@ -1332,10 +1348,10 @@ static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
             (vdev->device_id & 0xff00) == 0x5800) {
             msix->pba_offset = 0x1000;
         } else {
-            error_report("vfio: Hardware reports invalid configuration, "
-                         "MSIX PBA outside of specified BAR");
+            error_setg(errp, "hardware reports invalid configuration, "
+                       "MSIX PBA outside of specified BAR");
             g_free(msix);
-            return -EINVAL;
+            return;
         }
     }
 
@@ -1344,11 +1360,9 @@ static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
     vdev->msix = msix;
 
     vfio_pci_fixup_msix_region(vdev);
-
-    return 0;
 }
 
-static int vfio_msix_setup(VFIOPCIDevice *vdev, int pos)
+static int vfio_msix_setup(VFIOPCIDevice *vdev, int pos, Error **errp)
 {
     int ret;
 
@@ -1363,7 +1377,7 @@ static int vfio_msix_setup(VFIOPCIDevice *vdev, int pos)
         if (ret == -ENOTSUP) {
             return 0;
         }
-        error_report("vfio: msix_init failed");
+        error_setg(errp, "msix_init failed");
         return ret;
     }
 
@@ -1548,7 +1562,8 @@ static void vfio_add_emulated_long(VFIOPCIDevice *vdev, int pos,
     vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask);
 }
 
-static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size)
+static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size,
+                               Error **errp)
 {
     uint16_t flags;
     uint8_t type;
@@ -1560,8 +1575,8 @@ static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size)
         type != PCI_EXP_TYPE_LEG_END &&
         type != PCI_EXP_TYPE_RC_END) {
 
-        error_report("vfio: Assignment of PCIe type 0x%x "
-                     "devices is not currently supported", type);
+        error_setg(errp, "assignment of PCIe type 0x%x "
+                   "devices is not currently supported", type);
         return -EINVAL;
     }
 
@@ -1695,7 +1710,7 @@ static void vfio_check_af_flr(VFIOPCIDevice *vdev, uint8_t pos)
     }
 }
 
-static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos)
+static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos, Error **errp)
 {
     PCIDevice *pdev = &vdev->pdev;
     uint8_t cap_id, next, size;
@@ -1720,9 +1735,9 @@ static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos)
      * will be changed as we unwind the stack.
      */
     if (next) {
-        ret = vfio_add_std_cap(vdev, next);
+        ret = vfio_add_std_cap(vdev, next, errp);
         if (ret) {
-            return ret;
+            goto out;
         }
     } else {
         /* Begin the rebuild, use QEMU emulated list bits */
@@ -1736,40 +1751,40 @@ static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos)
 
     switch (cap_id) {
     case PCI_CAP_ID_MSI:
-        ret = vfio_msi_setup(vdev, pos);
+        ret = vfio_msi_setup(vdev, pos, errp);
         break;
     case PCI_CAP_ID_EXP:
         vfio_check_pcie_flr(vdev, pos);
-        ret = vfio_setup_pcie_cap(vdev, pos, size);
+        ret = vfio_setup_pcie_cap(vdev, pos, size, errp);
         break;
     case PCI_CAP_ID_MSIX:
-        ret = vfio_msix_setup(vdev, pos);
+        ret = vfio_msix_setup(vdev, pos, errp);
         break;
     case PCI_CAP_ID_PM:
         vfio_check_pm_reset(vdev, pos);
         vdev->pm_cap = pos;
-        ret = pci_add_capability(pdev, cap_id, pos, size);
+        ret = pci_add_capability2(pdev, cap_id, pos, size, errp);
         break;
     case PCI_CAP_ID_AF:
         vfio_check_af_flr(vdev, pos);
-        ret = pci_add_capability(pdev, cap_id, pos, size);
+        ret = pci_add_capability2(pdev, cap_id, pos, size, errp);
         break;
     default:
-        ret = pci_add_capability(pdev, cap_id, pos, size);
+        ret = pci_add_capability2(pdev, cap_id, pos, size, errp);
         break;
     }
-
+out:
     if (ret < 0) {
-        error_report("vfio: %s Error adding PCI capability "
-                     "0x%x[0x%x]@0x%x: %d", vdev->vbasedev.name,
-                     cap_id, size, pos, ret);
+        error_prepend(errp,
+                      "failed to add PCI capability 0x%x[0x%x]@0x%x: ",
+                      cap_id, size, pos);
         return ret;
     }
 
     return 0;
 }
 
-static int vfio_add_ext_cap(VFIOPCIDevice *vdev)
+static void vfio_add_ext_cap(VFIOPCIDevice *vdev)
 {
     PCIDevice *pdev = &vdev->pdev;
     uint32_t header;
@@ -1780,7 +1795,7 @@ static int vfio_add_ext_cap(VFIOPCIDevice *vdev)
     /* Only add extended caps if we have them and the guest can see them */
     if (!pci_is_express(pdev) || !pci_bus_is_express(pdev->bus) ||
         !pci_get_long(pdev->config + PCI_CONFIG_SPACE_SIZE)) {
-        return 0;
+        return;
     }
 
     /*
@@ -1845,10 +1860,10 @@ static int vfio_add_ext_cap(VFIOPCIDevice *vdev)
     }
 
     g_free(config);
-    return 0;
+    return;
 }
 
-static int vfio_add_capabilities(VFIOPCIDevice *vdev)
+static int vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp)
 {
     PCIDevice *pdev = &vdev->pdev;
     int ret;
@@ -1858,12 +1873,13 @@ static int vfio_add_capabilities(VFIOPCIDevice *vdev)
         return 0; /* Nothing to add */
     }
 
-    ret = vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
+    ret = vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST], errp);
     if (ret) {
         return ret;
     }
 
-    return vfio_add_ext_cap(vdev);
+    vfio_add_ext_cap(vdev);
+    return 0;
 }
 
 static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
@@ -1905,7 +1921,12 @@ static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
 
 static void vfio_pci_post_reset(VFIOPCIDevice *vdev)
 {
-    vfio_intx_enable(vdev);
+    Error *err = NULL;
+
+    vfio_intx_enable(vdev, &err);
+    if (err) {
+        error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name);
+    }
 }
 
 static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
@@ -1930,7 +1951,9 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
 
     trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
 
-    vfio_pci_pre_reset(vdev);
+    if (!single) {
+        vfio_pci_pre_reset(vdev);
+    }
     vdev->vbasedev.needs_reset = false;
 
     info = g_malloc0(sizeof(*info));
@@ -2088,7 +2111,9 @@ out:
         }
     }
 out_single:
-    vfio_pci_post_reset(vdev);
+    if (!single) {
+        vfio_pci_post_reset(vdev);
+    }
     g_free(info);
 
     return ret;
@@ -2134,7 +2159,7 @@ static VFIODeviceOps vfio_pci_ops = {
     .vfio_eoi = vfio_intx_eoi,
 };
 
-int vfio_populate_vga(VFIOPCIDevice *vdev)
+int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
 {
     VFIODevice *vbasedev = &vdev->vbasedev;
     struct vfio_region_info *reg_info;
@@ -2142,15 +2167,18 @@ int vfio_populate_vga(VFIOPCIDevice *vdev)
 
     ret = vfio_get_region_info(vbasedev, VFIO_PCI_VGA_REGION_INDEX, &reg_info);
     if (ret) {
+        error_setg_errno(errp, -ret,
+                         "failed getting region info for VGA region index %d",
+                         VFIO_PCI_VGA_REGION_INDEX);
         return ret;
     }
 
     if (!(reg_info->flags & VFIO_REGION_INFO_FLAG_READ) ||
         !(reg_info->flags & VFIO_REGION_INFO_FLAG_WRITE) ||
         reg_info->size < 0xbffff + 1) {
-        error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
-                     (unsigned long)reg_info->flags,
-                     (unsigned long)reg_info->size);
+        error_setg(errp, "unexpected VGA info, flags 0x%lx, size 0x%lx",
+                   (unsigned long)reg_info->flags,
+                   (unsigned long)reg_info->size);
         g_free(reg_info);
         return -EINVAL;
     }
@@ -2199,7 +2227,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev)
     return 0;
 }
 
-static int vfio_populate_device(VFIOPCIDevice *vdev)
+static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
 {
     VFIODevice *vbasedev = &vdev->vbasedev;
     struct vfio_region_info *reg_info;
@@ -2208,19 +2236,19 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
 
     /* Sanity check device */
     if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) {
-        error_report("vfio: Um, this isn't a PCI device");
-        goto error;
+        error_setg(errp, "this isn't a PCI device");
+        return;
     }
 
     if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
-        error_report("vfio: unexpected number of io regions %u",
-                     vbasedev->num_regions);
-        goto error;
+        error_setg(errp, "unexpected number of io regions %u",
+                   vbasedev->num_regions);
+        return;
     }
 
     if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
-        error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs);
-        goto error;
+        error_setg(errp, "unexpected number of irqs %u", vbasedev->num_irqs);
+        return;
     }
 
     for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
@@ -2231,8 +2259,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
         g_free(name);
 
         if (ret) {
-            error_report("vfio: Error getting region %d info: %m", i);
-            goto error;
+            error_setg_errno(errp, -ret, "failed to get region %d info", i);
+            return;
         }
 
         QLIST_INIT(&vdev->bars[i].quirks);
@@ -2241,8 +2269,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
     ret = vfio_get_region_info(vbasedev,
                                VFIO_PCI_CONFIG_REGION_INDEX, &reg_info);
     if (ret) {
-        error_report("vfio: Error getting config info: %m");
-        goto error;
+        error_setg_errno(errp, -ret, "failed to get config info");
+        return;
     }
 
     trace_vfio_populate_device_config(vdev->vbasedev.name,
@@ -2259,11 +2287,11 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
     g_free(reg_info);
 
     if (vdev->features & VFIO_FEATURE_ENABLE_VGA) {
-        ret = vfio_populate_vga(vdev);
+        ret = vfio_populate_vga(vdev, errp);
         if (ret) {
-            error_report(
-                "vfio: Device does not support requested feature x-vga");
-            goto error;
+            error_append_hint(errp, "device does not support "
+                              "requested feature x-vga\n");
+            return;
         }
     }
 
@@ -2273,17 +2301,13 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
     if (ret) {
         /* This can fail for an old kernel or legacy PCI dev */
         trace_vfio_populate_device_get_irq_info_failure();
-        ret = 0;
     } else if (irq_info.count == 1) {
         vdev->pci_aer = true;
     } else {
-        error_report("vfio: %s "
+        error_report(WARN_PREFIX
                      "Could not enable error recovery for the device",
                      vbasedev->name);
     }
-
-error:
-    return ret;
 }
 
 static void vfio_put_device(VFIOPCIDevice *vdev)
@@ -2487,18 +2511,26 @@ static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
     vdev->req_enabled = false;
 }
 
-static int vfio_initfn(PCIDevice *pdev)
+static void vfio_realize(PCIDevice *pdev, Error **errp)
 {
     VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
     VFIODevice *vbasedev_iter;
     VFIOGroup *group;
     char *tmp, group_path[PATH_MAX], *group_name;
+    Error *err = NULL;
     ssize_t len;
     struct stat st;
     int groupid;
     int i, ret;
 
     if (!vdev->vbasedev.sysfsdev) {
+        if (!(~vdev->host.domain || ~vdev->host.bus ||
+              ~vdev->host.slot || ~vdev->host.function)) {
+            error_setg(errp, "No provided host device");
+            error_append_hint(errp, "Use -vfio-pci,host=DDDD:BB:DD.F "
+                              "or -vfio-pci,sysfsdev=PATH_TO_DEVICE\n");
+            return;
+        }
         vdev->vbasedev.sysfsdev =
             g_strdup_printf("/sys/bus/pci/devices/%04x:%02x:%02x.%01x",
                             vdev->host.domain, vdev->host.bus,
@@ -2506,9 +2538,9 @@ static int vfio_initfn(PCIDevice *pdev)
     }
 
     if (stat(vdev->vbasedev.sysfsdev, &st) < 0) {
-        error_report("vfio: error: no such host device: %s",
-                     vdev->vbasedev.sysfsdev);
-        return -errno;
+        error_setg_errno(errp, errno, "no such host device");
+        error_prepend(errp, ERR_PREFIX, vdev->vbasedev.sysfsdev);
+        return;
     }
 
     vdev->vbasedev.name = g_strdup(basename(vdev->vbasedev.sysfsdev));
@@ -2520,45 +2552,44 @@ static int vfio_initfn(PCIDevice *pdev)
     g_free(tmp);
 
     if (len <= 0 || len >= sizeof(group_path)) {
-        error_report("vfio: error no iommu_group for device");
-        return len < 0 ? -errno : -ENAMETOOLONG;
+        error_setg_errno(errp, len < 0 ? errno : ENAMETOOLONG,
+                         "no iommu_group found");
+        goto error;
     }
 
     group_path[len] = 0;
 
     group_name = basename(group_path);
     if (sscanf(group_name, "%d", &groupid) != 1) {
-        error_report("vfio: error reading %s: %m", group_path);
-        return -errno;
+        error_setg_errno(errp, errno, "failed to read %s", group_path);
+        goto error;
     }
 
-    trace_vfio_initfn(vdev->vbasedev.name, groupid);
+    trace_vfio_realize(vdev->vbasedev.name, groupid);
 
-    group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev));
+    group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev), errp);
     if (!group) {
-        error_report("vfio: failed to get group %d", groupid);
-        return -ENOENT;
+        goto error;
     }
 
     QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
         if (strcmp(vbasedev_iter->name, vdev->vbasedev.name) == 0) {
-            error_report("vfio: error: device %s is already attached",
-                         vdev->vbasedev.name);
+            error_setg(errp, "device is already attached");
             vfio_put_group(group);
-            return -EBUSY;
+            goto error;
         }
     }
 
-    ret = vfio_get_device(group, vdev->vbasedev.name, &vdev->vbasedev);
+    ret = vfio_get_device(group, vdev->vbasedev.name, &vdev->vbasedev, errp);
     if (ret) {
-        error_report("vfio: failed to get device %s", vdev->vbasedev.name);
         vfio_put_group(group);
-        return ret;
+        goto error;
     }
 
-    ret = vfio_populate_device(vdev);
-    if (ret) {
-        return ret;
+    vfio_populate_device(vdev, &err);
+    if (err) {
+        error_propagate(errp, err);
+        goto error;
     }
 
     /* Get a copy of config space */
@@ -2567,8 +2598,8 @@ static int vfio_initfn(PCIDevice *pdev)
                 vdev->config_offset);
     if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
         ret = ret < 0 ? -errno : -EFAULT;
-        error_report("vfio: Failed to read device config space");
-        return ret;
+        error_setg_errno(errp, -ret, "failed to read device config space");
+        goto error;
     }
 
     /* vfio emulates a lot for us, but some bits need extra love */
@@ -2584,8 +2615,8 @@ static int vfio_initfn(PCIDevice *pdev)
      */
     if (vdev->vendor_id != PCI_ANY_ID) {
         if (vdev->vendor_id >= 0xffff) {
-            error_report("vfio: Invalid PCI vendor ID provided");
-            return -EINVAL;
+            error_setg(errp, "invalid PCI vendor ID provided");
+            goto error;
         }
         vfio_add_emulated_word(vdev, PCI_VENDOR_ID, vdev->vendor_id, ~0);
         trace_vfio_pci_emulated_vendor_id(vdev->vbasedev.name, vdev->vendor_id);
@@ -2595,8 +2626,8 @@ static int vfio_initfn(PCIDevice *pdev)
 
     if (vdev->device_id != PCI_ANY_ID) {
         if (vdev->device_id > 0xffff) {
-            error_report("vfio: Invalid PCI device ID provided");
-            return -EINVAL;
+            error_setg(errp, "invalid PCI device ID provided");
+            goto error;
         }
         vfio_add_emulated_word(vdev, PCI_DEVICE_ID, vdev->device_id, ~0);
         trace_vfio_pci_emulated_device_id(vdev->vbasedev.name, vdev->device_id);
@@ -2606,8 +2637,8 @@ static int vfio_initfn(PCIDevice *pdev)
 
     if (vdev->sub_vendor_id != PCI_ANY_ID) {
         if (vdev->sub_vendor_id > 0xffff) {
-            error_report("vfio: Invalid PCI subsystem vendor ID provided");
-            return -EINVAL;
+            error_setg(errp, "invalid PCI subsystem vendor ID provided");
+            goto error;
         }
         vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID,
                                vdev->sub_vendor_id, ~0);
@@ -2617,8 +2648,8 @@ static int vfio_initfn(PCIDevice *pdev)
 
     if (vdev->sub_device_id != PCI_ANY_ID) {
         if (vdev->sub_device_id > 0xffff) {
-            error_report("vfio: Invalid PCI subsystem device ID provided");
-            return -EINVAL;
+            error_setg(errp, "invalid PCI subsystem device ID provided");
+            goto error;
         }
         vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID, vdev->sub_device_id, ~0);
         trace_vfio_pci_emulated_sub_device_id(vdev->vbasedev.name,
@@ -2646,14 +2677,15 @@ static int vfio_initfn(PCIDevice *pdev)
 
     vfio_pci_size_rom(vdev);
 
-    ret = vfio_msix_early_setup(vdev);
-    if (ret) {
-        return ret;
+    vfio_msix_early_setup(vdev, &err);
+    if (err) {
+        error_propagate(errp, err);
+        goto error;
     }
 
     vfio_bars_setup(vdev);
 
-    ret = vfio_add_capabilities(vdev);
+    ret = vfio_add_capabilities(vdev, errp);
     if (ret) {
         goto out_teardown;
     }
@@ -2671,9 +2703,9 @@ static int vfio_initfn(PCIDevice *pdev)
         struct vfio_region_info *opregion;
 
         if (vdev->pdev.qdev.hotplugged) {
-            error_report("Cannot support IGD OpRegion feature on hotplugged "
-                         "device %s", vdev->vbasedev.name);
-            ret = -EINVAL;
+            error_setg(errp,
+                       "cannot support IGD OpRegion feature on hotplugged "
+                       "device");
             goto out_teardown;
         }
 
@@ -2681,16 +2713,14 @@ static int vfio_initfn(PCIDevice *pdev)
                         VFIO_REGION_TYPE_PCI_VENDOR_TYPE | PCI_VENDOR_ID_INTEL,
                         VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION, &opregion);
         if (ret) {
-            error_report("Device %s does not support requested IGD OpRegion "
-                         "feature", vdev->vbasedev.name);
+            error_setg_errno(errp, -ret,
+                             "does not support requested IGD OpRegion feature");
             goto out_teardown;
         }
 
-        ret = vfio_pci_igd_opregion_init(vdev, opregion);
+        ret = vfio_pci_igd_opregion_init(vdev, opregion, errp);
         g_free(opregion);
         if (ret) {
-            error_report("Device %s IGD OpRegion initialization failed",
-                         vdev->vbasedev.name);
             goto out_teardown;
         }
     }
@@ -2710,7 +2740,7 @@ static int vfio_initfn(PCIDevice *pdev)
         vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
                                                   vfio_intx_mmap_enable, vdev);
         pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_intx_update);
-        ret = vfio_intx_enable(vdev);
+        ret = vfio_intx_enable(vdev, errp);
         if (ret) {
             goto out_teardown;
         }
@@ -2720,13 +2750,14 @@ static int vfio_initfn(PCIDevice *pdev)
     vfio_register_req_notifier(vdev);
     vfio_setup_resetfn_quirk(vdev);
 
-    return 0;
+    return;
 
 out_teardown:
     pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
     vfio_teardown_msi(vdev);
     vfio_bars_exit(vdev);
-    return ret;
+error:
+    error_prepend(errp, ERR_PREFIX, vdev->vbasedev.name);
 }
 
 static void vfio_instance_finalize(Object *obj)
@@ -2808,6 +2839,10 @@ static void vfio_instance_init(Object *obj)
     device_add_bootindex_property(obj, &vdev->bootindex,
                                   "bootindex", NULL,
                                   &pci_dev->qdev, NULL);
+    vdev->host.domain = ~0U;
+    vdev->host.bus = ~0U;
+    vdev->host.slot = ~0U;
+    vdev->host.function = ~0U;
 }
 
 static Property vfio_pci_dev_properties[] = {
@@ -2855,7 +2890,7 @@ static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
     dc->vmsd = &vfio_pci_vmstate;
     dc->desc = "VFIO-based PCI device assignment";
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-    pdc->init = vfio_initfn;
+    pdc->realize = vfio_realize;
     pdc->exit = vfio_exitfn;
     pdc->config_read = vfio_pci_read_config;
     pdc->config_write = vfio_pci_write_config;