Commits
Robin Murphy committed f0cfffc48ca
iommu/arm-smmu: Work around MMU-500 prefetch errata MMU-500 erratum #841119 is tickled by a particular set of circumstances interacting with the next-page prefetcher. Since said prefetcher is quite dumb and actually detrimental to performance in some cases (by causing unwanted TLB evictions for non-sequential access patterns), we lose very little by turning it off, and what we gain is a guarantee that the erratum is never hit. As a bonus, the same workaround will also prevent erratum #826419 once v7 short descriptor support is implemented. CC: Catalin Marinas <catalin.marinas@arm.com> CC: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>