Merge remote-tracking branch 'remotes/awilliam/tags/vfio-updates-20170710.0' into staging

VFIO fixes 2017-07-10

 - Don't iterate over non-realized devices (Alex Williamson)
 - Add PCIe capability version fixup (Alex Williamson)

# gpg: Signature made Mon 10 Jul 2017 20:06:11 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-20170710.0:
  vfio/pci: Fixup v0 PCIe capabilities
  vfio: Test realized when using VFIOGroup.device_list iterator

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

4 files changed, 23 insertions, 4 deletions

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index b9abe77f5a..29923e4990 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -858,13 +858,15 @@ void vfio_reset_handler(void *opaque)
 
     QLIST_FOREACH(group, &vfio_group_list, next) {
         QLIST_FOREACH(vbasedev, &group->device_list, next) {
-            vbasedev->ops->vfio_compute_needs_reset(vbasedev);
+            if (vbasedev->dev->realized) {
+                vbasedev->ops->vfio_compute_needs_reset(vbasedev);
+            }
         }
     }
 
     QLIST_FOREACH(group, &vfio_group_list, next) {
         QLIST_FOREACH(vbasedev, &group->device_list, next) {
-            if (vbasedev->needs_reset) {
+            if (vbasedev->dev->realized && vbasedev->needs_reset) {
                 vbasedev->ops->vfio_hot_reset_multi(vbasedev);
             }
         }
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 8de8272e96..d4051cb951 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -1743,6 +1743,18 @@ static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size,
                                PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
     }
 
+    /*
+     * Intel 82599 SR-IOV VFs report an invalid PCIe capability version 0
+     * (Niantic errate #35) causing Windows to error with a Code 10 for the
+     * device on Q35.  Fixup any such devices to report version 1.  If we
+     * were to remove the capability entirely the guest would lose extended
+     * config space.
+     */
+    if ((flags & PCI_EXP_FLAGS_VERS) == 0) {
+        vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
+                               1, PCI_EXP_FLAGS_VERS);
+    }
+
     pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size,
                              errp);
     if (pos < 0) {
@@ -2116,7 +2128,8 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
 
         /* Prep dependent devices for reset and clear our marker. */
         QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
-            if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
+            if (!vbasedev_iter->dev->realized ||
+                vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
                 continue;
             }
             tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
@@ -2197,7 +2210,8 @@ out:
         }
 
         QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
-            if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
+            if (!vbasedev_iter->dev->realized ||
+                vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
                 continue;
             }
             tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
@@ -2647,6 +2661,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
     vdev->vbasedev.name = g_strdup(basename(vdev->vbasedev.sysfsdev));
     vdev->vbasedev.ops = &vfio_pci_ops;
     vdev->vbasedev.type = VFIO_DEVICE_TYPE_PCI;
+    vdev->vbasedev.dev = &vdev->pdev.qdev;
 
     tmp = g_strdup_printf("%s/iommu_group", vdev->vbasedev.sysfsdev);
     len = readlink(tmp, group_path, sizeof(group_path));
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index a4663c918e..7c09deda61 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -640,6 +640,7 @@ static void vfio_platform_realize(DeviceState *dev, Error **errp)
     int i, ret;
 
     vbasedev->type = VFIO_DEVICE_TYPE_PLATFORM;
+    vbasedev->dev = dev;
     vbasedev->ops = &vfio_platform_ops;
 
     trace_vfio_platform_realize(vbasedev->sysfsdev ?
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 9521013d52..0b475a3596 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -115,6 +115,7 @@ typedef struct VFIODevice {
     struct VFIOGroup *group;
     char *sysfsdev;
     char *name;
+    DeviceState *dev;
     int fd;
     int type;
     bool reset_works;