On 14.11.2022 11:31, Marek Marczykowski-Górecki wrote: > When Xen domain configures MSI-X, the usual approach is to enable MSI-X > together with masking all of them via the config space, then fill the > table and only then clear PCI_MSIX_FLAGS_MASKALL. Allow doing this via > QEMU running in a stub domain. > > Previously, when changing PCI_MSIX_FLAGS_MASKALL was not allowed, the > whole write was aborted, preventing change to the PCI_MSIX_FLAGS_ENABLE > bit too. > > Note the Xen hypervisor intercepts this write anyway, and may keep the > PCI_MSIX_FLAGS_MASKALL bit set if it wishes to. It will store the > guest-requested state and will apply it eventually. > > Signed-off-by: Marek Marczykowski-Górecki <[email protected]>
Reviewed-by: Jan Beulich <[email protected]>
