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linux/drivers/vfio
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Alex Williamson 743bb75325 vfio/pci: Handle INTx IRQ_NOTCONNECTED 
[ Upstream commit 860be250fc ]

Some systems report INTx as not routed by setting pdev->irq to
IRQ_NOTCONNECTED, resulting in a -ENOTCONN error when trying to
setup eventfd signaling.  Include this in the set of conditions
for which the PIN register is virtualized to zero.

Additionally consolidate vfio_pci_get_irq_count() to use this
virtualized value in reporting INTx support via ioctl and sanity
checking ioctl paths since pdev->irq is re-used when the device
is in MSI mode.

The combination of these results in both the config space of the
device and the ioctl interface behaving as if the device does not
support INTx.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20250311230623.1264283-1-alex.williamson@redhat.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-06-04 14:41:58 +02:00
..
cdx vfio/cdx: Remove redundant initialization owner in vfio_cdx_driver 2023-08-16 11:13:51 -06:00
fsl-mc vfio/fsl-mc: Block calling interrupt handler without trigger 2024-04-03 15:28:49 +02:00
mdev vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent() 2023-09-22 12:48:04 -06:00
pci vfio/pci: Handle INTx IRQ_NOTCONNECTED 2025-06-04 14:41:58 +02:00
platform Revert "vfio/platform: check the bounds of read/write syscalls" 2025-02-21 13:57:27 +01:00
container.c VFIO updates for v6.3-rc1 2023-02-25 11:52:57 -08:00
device_cdev.c vfio: Add VFIO_DEVICE_[AT|DE]TACH_IOMMUFD_PT 2023-07-25 10:20:37 -06:00
group.c vfio: Move the IOMMU_CAP_CACHE_COHERENCY check in __vfio_register_dev() 2023-07-25 10:20:41 -06:00
iommufd.c vfio: Support IO page table replacement 2023-07-28 13:31:24 -03:00
iova_bitmap.c iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() 2025-02-08 09:52:22 +01:00
Kconfig vfio: Compile vfio_group infrastructure optionally 2023-07-25 10:20:50 -06:00
Makefile vfio: Compile vfio_group infrastructure optionally 2023-07-25 10:20:50 -06:00
vfio.h vfio: Compile vfio_group infrastructure optionally 2023-07-25 10:20:50 -06:00
vfio_iommu_spapr_tce.c vfio/spapr: Always clear TCEs before unsetting the window 2024-09-12 11:11:31 +02:00
vfio_iommu_type1.c vfio: align capability structures 2023-08-17 12:17:44 -06:00
vfio_main.c iommufd for 6.6 2023-08-30 20:41:37 -07:00
virqfd.c vfio: Introduce interface to flush virqfd inject workqueue 2024-04-03 15:28:49 +02:00