diff options
| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-10-19 21:23:21 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-10-29 21:12:10 +0300 |
| commit | 56b75b51ed6d5e7bffda59440404409bca2dff00 (patch) | |
| tree | 854c99426a880fe760fff24e109274978ccb9a69 /drivers/iommu/arm/arm-smmu/arm-smmu.h | |
| parent | 3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff) | |
| download | linux-56b75b51ed6d5e7bffda59440404409bca2dff00.tar.xz | |
iommu/arm-smmu: Allow implementation specific write_s2cr
The firmware found in some Qualcomm platforms intercepts writes to the
S2CR register in order to replace the BYPASS type with FAULT. Further
more it treats faults at this level as catastrophic and restarts the
device.
Add support for providing implementation specific versions of the S2CR
write function, to allow the Qualcomm driver to work around this
behavior.
Cc: <stable@vger.kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Steev Klimaszewski <steev@kali.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20201019182323.3162386-2-bjorn.andersson@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu/arm/arm-smmu/arm-smmu.h')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu/arm-smmu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h index 1a746476927c..b71647eaa319 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.h +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h @@ -436,6 +436,7 @@ struct arm_smmu_impl { int (*alloc_context_bank)(struct arm_smmu_domain *smmu_domain, struct arm_smmu_device *smmu, struct device *dev, int start); + void (*write_s2cr)(struct arm_smmu_device *smmu, int idx); }; #define INVALID_SMENDX -1 |