From: Jason Gunthorpe <jgg@ziepe.ca>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
Robin Murphy <robin.murphy@arm.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Steven Price <steven.price@arm.com>,
Suzuki K Poulose <Suzuki.Poulose@arm.com>,
Jiri Pirko <jiri@resnulli.us>,
Mostafa Saleh <smostafa@google.com>,
Petr Tesarik <ptesarik@suse.com>,
Alexey Kardashevskiy <aik@amd.com>,
Dan Williams <dan.j.williams@intel.com>,
Xu Yilun <yilun.xu@linux.intel.com>
Subject: Re: [PATCH v3 0/9] dma-mapping: Use DMA_ATTR_CC_SHARED through direct, pool and swiotlb paths
Date: Sat, 9 May 2026 21:36:16 -0300 [thread overview]
Message-ID: <20260510003616.GL9285@ziepe.ca> (raw)
In-Reply-To: <af4dK-0HEsKdPAvM@arm.com>
On Fri, May 08, 2026 at 06:28:11PM +0100, Catalin Marinas wrote:
> That said, does CC_ATTR_GUEST_MEM_ENCRYPT actually make more sense than
> CC_ATTR_MEM_ENCRYPT throughout this series? We'd need to change arm64
> realms as well to use this one.
It is often quite confusing in the DMA API and iommu what is guest
logic and what is host logic, so this does sound nice. AFAIK none of
this forced bouncing, T=1 or CC_SHARED logic applies to host in the
DMA API.
Jason
next prev parent reply other threads:[~2026-05-10 0:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 5:55 [PATCH v3 0/9] dma-mapping: Use DMA_ATTR_CC_SHARED through direct, pool and swiotlb paths Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 1/9] dma-direct: swiotlb: handle swiotlb alloc/free outside __dma_direct_alloc_pages Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 2/9] dma-direct: use DMA_ATTR_CC_SHARED in alloc/free paths Aneesh Kumar K.V (Arm)
2026-05-08 9:26 ` Catalin Marinas
2026-05-11 5:38 ` Aneesh Kumar K.V
2026-04-27 5:55 ` [PATCH v3 3/9] dma-pool: track decrypted atomic pools and select them via attrs Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 4/9] dma: swiotlb: track pool encryption state and honor DMA_ATTR_CC_SHARED Aneesh Kumar K.V (Arm)
2026-05-08 16:49 ` Catalin Marinas
2026-05-11 5:14 ` Aneesh Kumar K.V
2026-04-27 5:55 ` [PATCH v3 5/9] dma-mapping: make dma_pgprot() " Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 6/9] dma-direct: pass attrs to dma_capable() for DMA_ATTR_CC_SHARED checks Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 7/9] dma-direct: make dma_direct_map_phys() honor DMA_ATTR_CC_SHARED Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 8/9] dma-direct: set decrypted flag for remapped DMA allocations Aneesh Kumar K.V (Arm)
2026-04-27 5:55 ` [PATCH v3 9/9] dma-direct: select DMA address encoding from DMA_ATTR_CC_SHARED Aneesh Kumar K.V (Arm)
2026-05-08 17:28 ` [PATCH v3 0/9] dma-mapping: Use DMA_ATTR_CC_SHARED through direct, pool and swiotlb paths Catalin Marinas
2026-05-10 0:36 ` Jason Gunthorpe [this message]
2026-05-11 11:13 ` Mostafa Saleh
2026-05-12 12:42 ` Jason Gunthorpe
2026-05-11 11:18 ` Aneesh Kumar K.V
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