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| author | Navneet Kumar <navneetk@nvidia.com> | 2019-10-16 13:50:24 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-10-18 11:46:11 +0200 |
| commit | 446152d5b6537bae576c321e4cc24ff690a69403 (patch) | |
| tree | e9dbc6eb0753b442048b72f600721f432e1896d2 /drivers/iommu/tegra-smmu.c | |
| parent | 4f5cafb5cb8471e54afdc9054d973535614f7675 (diff) | |
| download | linux-446152d5b6537bae576c321e4cc24ff690a69403.tar.gz | |
iommu/tegra-smmu: Use non-secure register for flushing
Use PTB_ASID instead of SMMU_CONFIG to flush smmu. PTB_ASID can be accessed from non-secure mode, SMMU_CONFIG cannot be. Using SMMU_CONFIG could pose a problem when kernel doesn't have secure mode access enabled from boot. Signed-off-by: Navneet Kumar <navneetk@nvidia.com> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Tested-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/tegra-smmu.c')
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 7293fc3f796d..0b74e17794b1 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -240,7 +240,7 @@ static inline void smmu_flush_tlb_group(struct tegra_smmu *smmu, static inline void smmu_flush(struct tegra_smmu *smmu) { - smmu_readl(smmu, SMMU_CONFIG); + smmu_readl(smmu, SMMU_PTB_ASID); } static int tegra_smmu_alloc_asid(struct tegra_smmu *smmu, unsigned int *idp) |