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Marek Marczykowski-Górecki 5e29500eba xen-pciback: Allow setting PCI_MSIX_FLAGS_MASKALL too

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>

2022-11-14 13:29:10 +01:00

conf_space_capability.c

xen-pciback: Allow setting PCI_MSIX_FLAGS_MASKALL too

2022-11-14 13:29:10 +01:00

conf_space_header.c

xen-pciback: allow compiling on other archs than x86

2021-11-02 08:03:43 -05:00

conf_space_quirks.c

xen-pciback: Use dev_printk() when possible

2020-05-27 17:27:37 -05:00

conf_space_quirks.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license