kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-20 19:23:40 +00:00
Code Issues Releases Packages Activity
linux/drivers/iommu/amd
History
Robin Murphy 5cef836864 iommu/amd: Tidy up DMA ops init 
[ Upstream commit be227f8e99 ]

Now that DMA ops are part of the core API via iommu-dma, fold the
vestigial remains of the IOMMU_DMA_OPS init state into the IOMMU API
phase, and clean up a few other leftovers. This should also close the
race window wherein bus_set_iommu() effectively makes the DMA ops state
visible before its nominal initialisation - it seems this was previously
fairly benign, but since commit a250c23f15 ("iommu: remove
DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE") it can now lead to the strict flush
queue policy inadvertently being picked for default domains allocated
during that window, with a corresponding unexpected perfomance impact.

Reported-by: Jussi Maki <joamaki@gmail.com>
Tested-by: Jussi Maki <joamaki@gmail.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Fixes: a250c23f15 ("iommu: remove DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE")
Link: https://lore.kernel.org/r/665db61e23ff8d54ac5eb391bef520b3a803fcb9.1622727974.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2021-07-14 17:07:35 +02:00
..
amd_iommu.h iommu/amd: Tidy up DMA ops init 2021-07-14 17:07:35 +02:00
amd_iommu_types.h iommu/amd: Remove the unused device errata code 2021-04-07 11:14:43 +02:00
debugfs.c iommu/amd: Move AMD IOMMU driver into subdirectory 2020-06-10 17:46:42 +02:00
init.c iommu/amd: Tidy up DMA ops init 2021-07-14 17:07:35 +02:00
io_pgtable.c iommu/amd: Fix sleeping in atomic in increase_address_space() 2021-03-04 13:15:56 +01:00
iommu.c iommu/amd: Tidy up DMA ops init 2021-07-14 17:07:35 +02:00
iommu_v2.c iommu/amd: Use DEFINE_SPINLOCK() for spinlock 2021-01-27 12:41:11 +01:00
Kconfig iommu/amd: Prepare for generic IO page table framework 2021-01-28 16:51:17 +01:00
Makefile iommu/amd: Prepare for generic IO page table framework 2021-01-28 16:51:17 +01:00
quirks.c iommu/amd: Move AMD IOMMU driver into subdirectory 2020-06-10 17:46:42 +02:00