linux-kernel - Re: [PATCHv10 0/9] System Cache support for GPU and required SMMU support

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Date:   Wed, 25 Nov 2020 14:05:20 +0000
From:   Will Deacon <will@...nel.org>
To:     Robin Murphy <robin.murphy@....com>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Rob Clark <robdclark@...il.com>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Joerg Roedel <joro@...tes.org>
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>,
        Kristian H Kristensen <hoegsberg@...gle.com>,
        iommu@...ts.linux-foundation.org, dri-devel@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        freedreno@...ts.freedesktop.org
Subject: Re: [PATCHv10 0/9] System Cache support for GPU and required SMMU support

On Wed, 25 Nov 2020 12:30:09 +0530, Sai Prakash Ranjan wrote:
> Some hardware variants contain a system cache or the last level
> cache(llc). This cache is typically a large block which is shared
> by multiple clients on the SOC. GPU uses the system cache to cache
> both the GPU data buffers(like textures) as well the SMMU pagetables.
> This helps with improved render performance as well as lower power
> consumption by reducing the bus traffic to the system memory.
> 
> [...]

Applied first two patches on a shared branch for Rob:

	arm64 (for-next/iommu/io-pgtable-domain-attr), thanks!

[1/9] iommu/io-pgtable: Add a domain attribute for pagetable configuration
      https://git.kernel.org/arm64/c/a7656ecf825a
[2/9] iommu/io-pgtable-arm: Add support to use system cache
      https://git.kernel.org/arm64/c/e67890c97944

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev