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qemu/hw/vfio
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Cédric Le Goater b79a2ef0d4 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: 5ebffa4e87 ("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>
(cherry picked from commit d2b668fca5)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2024-01-29 23:08:46 +03:00
..
amd-xgbe.c Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
ap.c vfio/container: Move IBM EEH related functions into spapr_pci_vfio.c 2023-11-06 13:23:23 +01:00
calxeda-xgmac.c Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
ccw.c vfio/container: Move IBM EEH related functions into spapr_pci_vfio.c 2023-11-06 13:23:23 +01:00
common.c hw/vfio: fix iteration over global VFIODevice list 2024-01-08 19:29:12 +03:00
container.c vfio/container: Replace basename with g_path_get_basename 2024-01-08 19:28:35 +03:00
display.c hw/vfio: add ramfb migration support 2023-10-18 10:10:49 +02:00
helpers.c vfio/container: Move IBM EEH related functions into spapr_pci_vfio.c 2023-11-06 13:23:23 +01:00
igd.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
Kconfig hw/vfio: Move the IGD quirk code to a separate file 2020-02-06 11:55:42 -07:00
meson.build vfio/common: Move legacy VFIO backend code into separate container.c 2023-10-18 10:10:49 +02:00
migration.c migration: simplify notifiers 2023-10-20 08:51:41 +02:00
pci-quirks.c spapr: Remove support for NVIDIA V100 GPU with NVLink2 2023-09-18 07:25:28 -03:00
pci.c vfio/pci: Clear MSI-X IRQ index always 2024-01-29 23:08:46 +03:00
pci.h hw/vfio: add ramfb migration support 2023-10-18 10:10:49 +02:00
platform.c vfio/platform: Use vfio_[attach/detach]_device 2023-10-18 10:10:49 +02:00
spapr.c vfio/common: Move vfio_host_win_add/del into spapr.c 2023-11-06 13:23:23 +01:00
trace-events vfio/platform: Use vfio_[attach/detach]_device 2023-10-18 10:10:49 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00