On Wed, 11 Aug 2021 23:49:26 +0800, John Garry wrote:
> Pre-zeroing the batched commands structure is inefficient, as individual
> commands are zeroed later in arm_smmu_cmdq_build_cmd(). The size is quite
> large and commonly most commands won't even be used:
>
> struct arm_smmu_cmdq_batch cmds = {};
> 345c: 52800001 mov w1, #0x0 // #0
> 3460: d2808102 mov x2, #0x408 // #1032
> 3464: 910143a0 add x0, x29, #0x50
> 3468: 94000000 bl 0 <memset>
>
> [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu-v3: Stop pre-zeroing batch commands
https://git.kernel.org/will/c/fac956710ab0
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
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