[PATCH v9 0/3] Cavium ThunderX2 SMMUv3 errata workarounds
From: Geetha sowjanya
Date: Thu Jun 22 2017 - 08:25:44 EST
Cavium ThunderX2 SMMUv3 implementation has two Silicon Erratas.
1. Errata ID #74
SMMU register alias Page 1 is not implemented
2. Errata ID #126
SMMU doesnt support unique IRQ lines and also MSI for gerror,
eventq and cmdq-sync
The following patchset does software workaround for these two erratas.
This series is based on patchset.
Changes since v8:
- Reworked patch #3 as suggested by Will.
- Corrected typo mistake in patch #2
Changes since v7:
- Added new function "arm_smmu_v3_resource_size" in iort.c to get resource
- Added new SMMU option "SHARED_IRQ" to enable errata #126 workaround.
- Coding style issues fixed.
- Suggested changes in arm_smmu_device_probe addressed.
- Replaced ACPI_IORT_SMMU_CAVIUM_CN99XX macro with ACPI_IORT_SMMU_V3_CAVIUM_CN99XX
Changes since v6:
- Changed device tree compatible string to vendor specific.
- Rebased on Robin's latest "Update SMMU models for IORT rev. C" v2 patch.
Changes since v5:
- Rebased on Robin's "Update SMMU models for IORT rev. C" patch.
- Replaced ACPI_IORT_SMMU_V3_CAVIUM_CN99XX macro with ACPI_IORT_SMMU_CAVIUM_CN99XX
Changes since v4:
- Replaced all page1 offset macros ARM_SMMU_EVTQ/PRIQ_PROD/CONS with
Changes since v3:
- Merged patches 1, 2 and 4 of Version 3.
- Modified the page1_offset_adjust() and get_irq_flags() implementation as
suggested by Robin.
Changes since v2:
- Updated "Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt" document with
new SMMU option used to enable errata workaround.
Changes since v1:
- Since the use of MIDR register is rejected and SMMU_IIDR is broken on this
silicon, as suggested by Will Deacon modified the patches to use ThunderX2
SMMUv3 IORT model number to enable errata workaround.
Geetha Sowjanya (1):
iommu/arm-smmu-v3: Add workaround for Cavium ThunderX2 erratum #126
Linu Cherian (2):
ACPI/IORT: Fixup SMMUv3 resource size for Cavium ThunderX2 SMMUv3
iommu/arm-smmu-v3: Add workaround for Cavium ThunderX2 erratum #74
Documentation/arm64/silicon-errata.txt | 2 +
.../devicetree/bindings/iommu/arm,smmu-v3.txt | 7 +
drivers/acpi/arm64/iort.c | 69 ++++++---
drivers/iommu/arm-smmu-v3.c | 171 +++++++++++++++-----
4 files changed, 186 insertions(+), 63 deletions(-)