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-rw-r--r--drivers/iommu/arm-smmu.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 93b9177d4dfd..d01802e7cbfd 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -264,6 +264,7 @@ enum arm_smmu_s2cr_privcfg {
#define TTBCR2_SEP_SHIFT 15
#define TTBCR2_SEP_UPSTREAM (0x7 << TTBCR2_SEP_SHIFT)
+#define TTBCR2_AS (1 << 4)
#define TTBRn_ASID_SHIFT 48
@@ -783,6 +784,8 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
reg = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
reg2 = pgtbl_cfg->arm_lpae_s1_cfg.tcr >> 32;
reg2 |= TTBCR2_SEP_UPSTREAM;
+ if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
+ reg2 |= TTBCR2_AS;
}
if (smmu->version > ARM_SMMU_V1)
writel_relaxed(reg2, cb_base + ARM_SMMU_CB_TTBCR2);