Re: [PATCH v3 3/8] iommu/arm-smmu: Consult context bank allocator for identify domains
From: Sai Prakash Ranjan <hidden>
Date: 2020-09-11 08:25:41
On 2020-09-04 21:25, Bjorn Andersson wrote:
For implementations of the ARM SMMU where stream mappings of bypass type are prohibited identity domains can be implemented by using context banks with translation disabled. Postpone the decision to skip allocating a context bank until the implementation specific context bank allocator has been consulted and if it decides to use a context bank for the identity map, don't enable translation (i.e. omit ARM_SMMU_SCTLR_M). Signed-off-by: Bjorn Andersson <redacted> ---
<snip>...
quoted hunk ↗ jump to hunk
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.hb/drivers/iommu/arm/arm-smmu/arm-smmu.h index ddf2ca4c923d..235d9a3a6ab6 100644--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h@@ -243,6 +243,8 @@ enum arm_smmu_cbar_type { #define TLB_LOOP_TIMEOUT 1000000 /* 1s! */ #define TLB_SPIN_COUNT 10 +#define ARM_SMMU_CBNDX_BYPASS 0xffff + /* Shared driver definitions */ enum arm_smmu_arch_version { ARM_SMMU_V1,@@ -346,6 +348,7 @@ struct arm_smmu_cfg { u32 sctlr_clr; /* bits to mask in SCTLR */ enum arm_smmu_cbar_type cbar; enum arm_smmu_context_fmt fmt; + bool m;
Can we use mmu_enable instead of m here to be more descriptive? Thanks, Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel