Revision C of IORT now allows us to identify ARM MMU-401 and the Cavium ThunderX implementation. Wire them up so that we can probe these models once firmware starts using the new codes, and so that the appropriate features and quirks get enabled when we do.
For the sake of backports and mitigating sychronisation problems with the ACPICA headers, we'll carry a backup copy of the new definitions locally for the short term to make life simpler. CC: [email protected] # 4.10 Acked-by: Robert Richter <[email protected]> Tested-by: Robert Richter <[email protected]> Signed-off-by: Robin Murphy <[email protected]> --- v2: Add local backup definitions This is ready to go regardless of patch 1. The stable backport is in likely anticipation of machines with updated firmware paired with stable distro kernels, which would be unable to recognise and probe the SMMU otherwise. Robin. drivers/iommu/arm-smmu.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 7ec30b08b3bd..79b9bb7d4783 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -312,6 +312,14 @@ enum arm_smmu_implementation { CAVIUM_SMMUV2, }; +/* Until ACPICA headers cover IORT rev. C */ +#ifndef ACPI_IORT_SMMU_CORELINK_MMU401 +#define ACPI_IORT_SMMU_CORELINK_MMU401 0x4 +#endif +#ifndef ACPI_IORT_SMMU_CAVIUM_SMMUV2 +#define ACPI_IORT_SMMU_CAVIUM_SMMUV2 0x5 +#endif + struct arm_smmu_s2cr { struct iommu_group *group; int count; @@ -2073,6 +2081,10 @@ static int acpi_smmu_get_data(u32 model, struct arm_smmu_device *smmu) smmu->version = ARM_SMMU_V1; smmu->model = GENERIC_SMMU; break; + case ACPI_IORT_SMMU_CORELINK_MMU401: + smmu->version = ARM_SMMU_V1_64K; + smmu->model = GENERIC_SMMU; + break; case ACPI_IORT_SMMU_V2: smmu->version = ARM_SMMU_V2; smmu->model = GENERIC_SMMU; @@ -2081,6 +2093,10 @@ static int acpi_smmu_get_data(u32 model, struct arm_smmu_device *smmu) smmu->version = ARM_SMMU_V2; smmu->model = ARM_MMU500; break; + case ACPI_IORT_SMMU_CAVIUM_SMMUV2: + smmu->version = ARM_SMMU_V2; + smmu->model = CAVIUM_SMMUV2; + break; default: ret = -ENODEV; } -- 2.12.2.dirty _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
