Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Robin Murphy <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Changelog:
==========
v1 -> v2:
- Backport other relevant errata patches from the same series as MMU-700 erratum 2812531
- v1 link: https://lore.kernel.org/stable/[email protected]/T/#u
Robin Murphy (4):
iommu/arm-smmu-v3: Work around MMU-600 erratum 1076982
iommu/arm-smmu-v3: Document MMU-700 erratum 2812531
iommu/arm-smmu-v3: Add explicit feature for nesting
iommu/arm-smmu-v3: Document nesting-related errata
Documentation/arm64/silicon-errata.rst | 4 ++
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 50 +++++++++++++++++++++
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 8 ++++
3 files changed, 62 insertions(+)
--
2.25.1
From: Robin Murphy <[email protected]>
commit 0bfbfc526c70606bf0fad302e4821087cbecfaf4 upstream
Both MMU-600 and MMU-700 have similar errata around TLB invalidation
while both stages of translation are active, which will need some
consideration once nesting support is implemented. For now, though,
it's very easy to make our implicit lack of nesting support explicit
for those cases, so they're less likely to be missed in future.
Signed-off-by: Robin Murphy <[email protected]>
Reviewed-by: Nicolin Chen <[email protected]>
Link: https://lore.kernel.org/r/696da78d32bb4491f898f11b0bb4d850a8aa7c6a.1683731256.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Easwar Hariharan <[email protected]>
---
Documentation/arm64/silicon-errata.rst | 4 ++--
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 5 +++++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index 322df8abbc0e..83a75e16e54d 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -122,9 +122,9 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU-500 | #841119,826419 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
-| ARM | MMU-600 | #1076982 | N/A |
+| ARM | MMU-600 | #1076982,1209401| N/A |
+----------------+-----------------+-----------------+-----------------------------+
-| ARM | MMU-700 | #2812531 | N/A |
+| ARM | MMU-700 | #2268618,2812531| N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_845719 |
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 7cec4a457d91..340ef116d574 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3487,11 +3487,16 @@ static void arm_smmu_device_iidr_probe(struct arm_smmu_device *smmu)
/* Arm erratum 1076982 */
if (variant == 0 && revision <= 2)
smmu->features &= ~ARM_SMMU_FEAT_SEV;
+ /* Arm erratum 1209401 */
+ if (variant < 2)
+ smmu->features &= ~ARM_SMMU_FEAT_NESTING;
break;
case IIDR_PRODUCTID_ARM_MMU_700:
/* Arm erratum 2812531 */
smmu->features &= ~ARM_SMMU_FEAT_BTM;
smmu->options |= ARM_SMMU_OPT_CMDQ_FORCE_SYNC;
+ /* Arm errata 2268618, 2812531 */
+ smmu->features &= ~ARM_SMMU_FEAT_NESTING;
break;
}
break;
--
2.25.1