Messages in this thread | | | Date | Fri, 11 Sep 2020 08:24:22 +0000 | From | Sai Prakash Ranjan <> | Subject | Re: [PATCH v3 3/8] iommu/arm-smmu: Consult context bank allocator for identify domains |
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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 <bjorn.andersson@linaro.org> > --- >
<snip>...
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h > b/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
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