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  1. 22 1月, 2018 5 次提交
  3. 21 1月, 2018 1 次提交
    • L
      qemu: assign correct type of PCI address for vhost-scsi when using pcie-root · 18c24bc6
      由 Laine Stump 提交于 
      Commit 10c73bf1 fixed a bug that I had introduced back in commit
70249927 - if a vhost-scsi device had no manually assigned PCI
address, one wouldn't be assigned automatically. There was a slight
problem with the logic of the fix though - in the case of domains with
pcie-root (e.g. those with a q35 machinetype),
qemuDomainDeviceCalculatePCIConnectFlags() will attempt to determine
if the host-side PCI device is Express or legacy by examining sysfs
based on the host-side PCI address stored in
hostdev->source.subsys.u.pci.addr, but that part of the union is only
valid for PCI hostdevs, *not* for SCSI hostdevs. So we end up trying
to read sysfs for some probably-non-existent device, which fails, and
the function virPCIDeviceIsPCIExpress() returns failure (-1).

By coincidence, the return value is being examined as a boolean, and
since -1 is true, we still end up assigning the vhost-scsi device to
an Express slot, but that is just by chance (and could fail in the
case that the gibberish in the "hostside PCI address" was the address
of a real device that happened to be legacy PCI).

Since (according to Paolo Bonzini) vhost-scsi devices appear just like
virtio-scsi devices in the guest, they should follow the same rules as
virtio devices when deciding whether they should be placed in an
Express or a legacy slot. That's accomplished in this patch by
returning early with virtioFlags, rather than erroneously using
hostdev->source.subsys.u.pci.addr. It also adds a test case for PCIe
to assure it doesn't get broken in the future.
      18c24bc6
  5. 20 1月, 2018 1 次提交
    • J
      nodedev: Fix failing to parse PCI address for non-PCI network devices · 71d56a39
      由 Jim Fehlig 提交于 
      Commit 8708ca01 added virNetDevSwitchdevFeature() to check if a network
device has Switchdev capabilities. virNetDevSwitchdevFeature() attempts
to retrieve the PCI device associated with the network device, ignoring
non-PCI devices. It does so via the following call chain

  virNetDevSwitchdevFeature()->virNetDevGetPCIDevice()->
  virPCIGetDeviceAddressFromSysfsLink()

For non-PCI network devices (qeth, Xen vif, etc),
virPCIGetDeviceAddressFromSysfsLink() will report an error when
virPCIDeviceAddressParse() fails. virPCIDeviceAddressParse() also
logs an error. After commit 8708ca01 there are now two errors reported
for each non-PCI network device even though the errors are harmless.

To avoid the errors, introduce virNetDevIsPCIDevice() and use it in
virNetDevGetPCIDevice() before attempting to retrieve the associated
PCI device. virNetDevIsPCIDevice() uses the 'subsystem' property of the
device to determine if it is PCI. See the sysfs rules in kernel
documentation for more details

https://www.kernel.org/doc/html/latest/admin-guide/sysfs-rules.html
      71d56a39
  7. 19 1月, 2018 4 次提交
  9. 18 1月, 2018 21 次提交
  11. 17 1月, 2018 4 次提交
  13. 16 1月, 2018 2 次提交
  15. 15 1月, 2018 2 次提交