[PATCH v2 00/24] iommu: Refactor DMA domain strictness

Robin Murphy
2021-07-28T16:02:01Z

Hi all,

Here's v2 where things start to look more realistic, hence the expanded
CC list. The patches are now based on the current iommu/core branch to
take John's iommu_set_dma_strict() cleanup into account.

The series remiains in two (or possibly 3) logical parts - for people
CC'd on cookie cleanup patches, the later parts should not affect you
since your drivers don't implement non-strict mode anyway; the cleanup
is all pretty straightforward, but please do yell at me if I've managed
to let a silly mistake slip through and broken your driver.

This time I have also build-tested x86 as well as arm64 :)

Changes in v2:

- Add iommu_is_dma_domain() helper to abstract flag check (and help
avoid silly typos like the one in v1).
- Tweak a few commit messages for spelling and (hopefully) clarity.
- Move the iommu_create_device_direct_mappings() update to patch #14
where it should have been.
- Rewrite patch #20 as a conversion of the now-existing option.
- Clean up the ops->flush_iotlb_all check which is also made redundant
by the new domain type
- Add patch #24, which is arguably tangential, but it was something I
spotted during the rebase, so...

Once again, the whole lot is available on a branch here:

https://gitlab.arm.com/linux-arm/linux-rm/-/tree/iommu/fq

Thanks,
Robin.

CC: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
CC: Geert Uytterhoeven <geert+renesas@glider.be>
CC: Yong Wu <yong.wu@mediatek.com>
CC: Heiko Stuebner <heiko@sntech.de>
CC: Chunyan Zhang <chunyan.zhang@unisoc.com>
CC: Chunyan Zhang <chunyan.zhang@unisoc.com>
CC: Maxime Ripard <mripard@kernel.org>
CC: Jean-Philippe Brucker <jean-philippe@linaro.org>

Robin Murphy (24):
iommu: Pull IOVA cookie management into the core
iommu/amd: Drop IOVA cookie management
iommu/arm-smmu: Drop IOVA cookie management
iommu/vt-d: Drop IOVA cookie management
iommu/exynos: Drop IOVA cookie management
iommu/ipmmu-vmsa: Drop IOVA cookie management
iommu/mtk: Drop IOVA cookie management
iommu/rockchip: Drop IOVA cookie management
iommu/sprd: Drop IOVA cookie management
iommu/sun50i: Drop IOVA cookie management
iommu/virtio: Drop IOVA cookie management
iommu/dma: Unexport IOVA cookie management
iommu/dma: Remove redundant "!dev" checks
iommu: Introduce explicit type for non-strict DMA domains
iommu/amd: Prepare for multiple DMA domain types
iommu/arm-smmu: Prepare for multiple DMA domain types
iommu/vt-d: Prepare for multiple DMA domain types
iommu: Express DMA strictness via the domain type
iommu: Expose DMA domain strictness via sysfs
iommu: Merge strictness and domain type configs
iommu/dma: Factor out flush queue init
iommu: Allow enabling non-strict mode dynamically
iommu/arm-smmu: Allow non-strict in pgtable_quirks interface
iommu: Only log strictness for DMA domains

.../ABI/testing/sysfs-kernel-iommu_groups | 2 +
drivers/iommu/Kconfig | 80 +++++++++----------
drivers/iommu/amd/iommu.c | 21 +----
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 25 ++++--
drivers/iommu/arm/arm-smmu/arm-smmu.c | 29 ++++---
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 8 --
drivers/iommu/dma-iommu.c | 44 +++++-----
drivers/iommu/exynos-iommu.c | 18 +----
drivers/iommu/intel/iommu.c | 23 ++----
drivers/iommu/iommu.c | 53 +++++++-----
drivers/iommu/ipmmu-vmsa.c | 27 +------
drivers/iommu/mtk_iommu.c | 6 --
drivers/iommu/rockchip-iommu.c | 11 +--
drivers/iommu/sprd-iommu.c | 6 --
drivers/iommu/sun50i-iommu.c | 12 +--
drivers/iommu/virtio-iommu.c | 8 --
include/linux/dma-iommu.h | 9 ++-
include/linux/iommu.h | 15 +++-
18 files changed, 171 insertions(+), 226 deletions(-)

--
2.25.1