Re: [PATCH 3/5] iommu/dart: Set DMA domain for locked DARTs
From: Robin Murphy <robin.murphy@arm.com>
Date: 2025-02-11 18:25:39
Also in:
asahi, linux-iommu, lkml
On 2025-02-10 7:39 pm, Alyssa Rosenzweig wrote:
This is required.
Now that we can, I'd really rather do this properly and not offer an identity domain in the first place when it's not available. Thanks, Robin.
quoted hunk ↗ jump to hunk
Signed-off-by: Alyssa Rosenzweig <redacted> --- drivers/iommu/apple-dart.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 9c74a95eb7e819e94ab2fb47ed0d411a1eba8bf7..9c6f780dc7220096ed6bba692fa1a4bd859b0d61 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c@@ -941,6 +941,8 @@ static int apple_dart_def_domain_type(struct device *dev) return IOMMU_DOMAIN_IDENTITY; if (!cfg->stream_maps[0].dart->supports_bypass) return IOMMU_DOMAIN_DMA; + if (cfg->stream_maps[0].dart->locked) + return IOMMU_DOMAIN_DMA; return 0; }