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iommu/arm-smmu: avoid using ASID 0

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Thulium has a hardware errata that requires that we avoid using ASID 0.
Implement the workaround in the SMMU driver.

Change-Id: Ia44ab1b385450994641c5f5ccb3dba4a462a8033
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-02-17 17:12:24 -08:00 • committed by David Keitel
parent 64bfe1d2be
commit fd8292fee2
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/arm-smmu.c
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@ -474,8 +474,8 @@ struct arm_smmu_cfg {
};
#define INVALID_IRPTNDX 0xff
#define ARM_SMMU_CB_ASID(cfg) ((cfg)->cbndx)
#define ARM_SMMU_CB_VMID(cfg) ((cfg)->cbndx + 1)
#define ARM_SMMU_CB_ASID(cfg) ((cfg)->cbndx + 1)
#define ARM_SMMU_CB_VMID(cfg) ((cfg)->cbndx + 2)
struct arm_smmu_domain {
struct arm_smmu_device *smmu;