linux/drivers/vfio
Yishai Hadas 032b4122a9 vfio/mlx5: Align the page tracking max message size with the device capability
[ Upstream commit 9c7c5430bc ]

Align the page tracking maximum message size with the device's
capability instead of relying on PAGE_SIZE.

This adjustment resolves a mismatch on systems where PAGE_SIZE is 64K,
but the firmware only supports a maximum message size of 4K.

Now that we rely on the device's capability for max_message_size, we
must account for potential future increases in its value.

Key considerations include:
- Supporting message sizes that exceed a single system page (e.g., an 8K
  message on a 4K system).
- Ensuring the RQ size is adjusted to accommodate at least 4
  WQEs/messages, in line with the device specification.

The above has been addressed as part of the patch.

Fixes: 79c3cf2799 ("vfio/mlx5: Init QP based resources for dirty tracking")
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Tested-by: Yingshun Cui <yicui@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20241205122654.235619-1-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-14 20:00:20 +01:00
..
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/mlx5: Align the page tracking max message size with the device capability 2024-12-14 20:00:20 +01:00
platform vfio/platform: Create persistent IRQ handlers 2024-04-03 15:28:49 +02:00
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: Consider page offset for the pages to be pinned 2024-03-01 13:35:05 +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