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| author | Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> | 2022-11-14 13:31:08 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-11-14 15:29:10 +0300 |
| commit | 5e29500eba2aa19e1323df46f64dafcd4a327092 (patch) | |
| tree | 6b0d93c2b731c3b1ba0c540c0ba779854b753edc /Documentation/riscv | |
| parent | da36a2a76b01b210ffaa55cdc2c99bc8783697c5 (diff) | |
| download | linux-5e29500eba2aa19e1323df46f64dafcd4a327092.tar.xz | |
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>
Diffstat (limited to 'Documentation/riscv')
0 files changed, 0 insertions, 0 deletions