Re: [PATCH v6 25/25] iommu: Convert remaining simple drivers to domain_alloc_paging()
From: Baolu Lu <baolu.lu@linux.intel.com>
Date: 2023-08-14 07:01:45
Also in:
linux-arm-kernel, linux-arm-msm, linux-iommu, linux-mediatek, linux-rockchip, linux-s390, linux-samsung-soc, linux-sunxi, linux-tegra
On 2023/8/3 8:08, Jason Gunthorpe wrote:
These drivers don't support IOMMU_DOMAIN_DMA, so this commit effectively allows them to support that mode. The prior work to require default_domains makes this safe because every one of these drivers is either compilation incompatible with dma-iommu.c, or already establishing a default_domain. In both cases alloc_domain() will never be called with IOMMU_DOMAIN_DMA for these drivers so it is safe to drop the test. Removing these tests clarifies that the domain allocation path is only about the functionality of a paging domain and has nothing to do with policy of how the paging domain is used for UNMANAGED/DMA/DMA_FQ. Tested-by: Niklas Schnelle<schnelle@linux.ibm.com> Tested-by: Steven Price<steven.price@arm.com> Tested-by: Marek Szyprowski<m.szyprowski@samsung.com> Tested-by: Nicolin Chen<redacted> Signed-off-by: Jason Gunthorpe<jgg@nvidia.com> --- drivers/iommu/msm_iommu.c | 7 ++----- drivers/iommu/mtk_iommu_v1.c | 7 ++----- drivers/iommu/omap-iommu.c | 7 ++----- drivers/iommu/s390-iommu.c | 7 ++----- 4 files changed, 8 insertions(+), 20 deletions(-)
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Best regards, baolu