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conf: nodedev: Update PCI mdev capabilities dynamically

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Just like SRIOV, a PCI device is only capable of the mediated devices
framework when it's bound to the vendor native driver, thus if a driver
change occurs, e.g. vendor_native->vfio, we need to refresh some of the
device's capabilities to reflect the reality, mdev included.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Suggested-by: Wu Zongyong <cordius.wu@huawei.com>
Signed-off-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Erik Skultety 2018-01-23 09:55:18 +01:00
parent 882fd7a13c
commit 75dbb27b10
1 changed files with 31 additions and 3 deletions
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34
src/conf/node_device_conf.c
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@ -2758,6 +2758,34 @@ virNodeDeviceGetPCIIOMMUGroupCaps(virNodeDevCapPCIDevPtr pci_dev)
} }
static int
virNodeDeviceGetPCIMdevTypesCaps(const char *sysfspath,
virNodeDevCapPCIDevPtr pci_dev)
{
virMediatedDeviceTypePtr *types = NULL;
int rc = 0;
size_t i;
/* this could be a refresh, so clear out the old data */
for (i = 0; i < pci_dev->nmdev_types; i++)
virMediatedDeviceTypeFree(pci_dev->mdev_types[i]);
VIR_FREE(pci_dev->mdev_types);
pci_dev->nmdev_types = 0;
pci_dev->flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_MDEV;
rc = virPCIGetMdevTypes(sysfspath, &types);
if (rc <= 0)
return rc;
VIR_STEAL_PTR(pci_dev->mdev_types, types);
pci_dev->nmdev_types = rc;
pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_MDEV;
return 0;
}
/* virNodeDeviceGetPCIDynamicCaps() get info that is stored in sysfs /* virNodeDeviceGetPCIDynamicCaps() get info that is stored in sysfs
* about devices related to this device, i.e. things that can change * about devices related to this device, i.e. things that can change
* without this device itself changing. These must be refreshed * without this device itself changing. These must be refreshed
@ -2768,9 +2796,9 @@ int
virNodeDeviceGetPCIDynamicCaps(const char *sysfsPath, virNodeDeviceGetPCIDynamicCaps(const char *sysfsPath,
virNodeDevCapPCIDevPtr pci_dev) virNodeDevCapPCIDevPtr pci_dev)
{ {
if (virNodeDeviceGetPCISRIOVCaps(sysfsPath, pci_dev) < 0) if (virNodeDeviceGetPCISRIOVCaps(sysfsPath, pci_dev) < 0 ||
return -1; virNodeDeviceGetPCIIOMMUGroupCaps(pci_dev) < 0 ||
if (virNodeDeviceGetPCIIOMMUGroupCaps(pci_dev) < 0) virNodeDeviceGetPCIMdevTypesCaps(sysfsPath, pci_dev) < 0)
return -1; return -1;
return 0; return 0;
} }