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| author | Cédric Le Goater <clg@redhat.com> | 2024-01-25 14:27:36 +0100 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2024-01-29 08:26:25 +0100 |
| commit | d2b668fca5652760b435ce812a743bba03d2f316 (patch) | |
| tree | 79cf535a425c0ac6334a91a2ea9bc5eb7c629d0b /qemu-img.c | |
| parent | 850051b94b4eac2e2eec985b313d840bd5eddb44 (diff) | |
| download | qemu-d2b668fca5652760b435ce812a743bba03d2f316.zip qemu-d2b668fca5652760b435ce812a743bba03d2f316.tar.gz qemu-d2b668fca5652760b435ce812a743bba03d2f316.tar.bz2 | |
vfio/pci: Clear MSI-X IRQ index always
When doing device assignment of a physical device, MSI-X can be
enabled with no vectors enabled and this sets the IRQ index to
VFIO_PCI_MSIX_IRQ_INDEX. However, when MSI-X is disabled, the IRQ
index is left untouched if no vectors are in use. Then, when INTx
is enabled, the IRQ index value is considered incompatible (set to
MSI-X) and VFIO_DEVICE_SET_IRQS fails. QEMU complains with :
qemu-system-x86_64: vfio 0000:08:00.0: Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Invalid argument
To avoid that, unconditionaly clear the IRQ index when MSI-X is
disabled.
Buglink: https://issues.redhat.com/browse/RHEL-21293
Fixes: 5ebffa4e87e7 ("vfio/pci: use an invalid fd to enable MSI-X")
Cc: Jing Liu <jing2.liu@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Diffstat (limited to 'qemu-img.c')
0 files changed, 0 insertions, 0 deletions