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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 <marmarek@invisiblethingslab.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Link: https://lore.kernel.org/r/20221114103110.1519413-1-marmarek@invisiblethingslab.com Signed-off-by: Juergen Gross <jgross@suse.com> |
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| .. | ||
| conf_space.c | ||
| conf_space.h | ||
| conf_space_capability.c | ||
| conf_space_header.c | ||
| conf_space_quirks.c | ||
| conf_space_quirks.h | ||
| Makefile | ||
| passthrough.c | ||
| pci_stub.c | ||
| pciback.h | ||
| pciback_ops.c | ||
| vpci.c | ||
| xenbus.c | ||