[PATCH v12 15/15] iommu/smmuv3: Add PASID cache invalidation per PASID
From: Eric Auger
Date: Mon Nov 16 2020 - 05:45:56 EST
In order to cascade guest CFGI_CD, let's add PASID cache invalidation
per PASID.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
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 6549c3ee6af6..eb0e09936803 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3002,9 +3002,19 @@ arm_smmu_cache_invalidate(struct iommu_domain *domain, struct device *dev,
} else {
return -EINVAL;
}
- }
- if (inv_info->cache & IOMMU_CACHE_INV_TYPE_PASID ||
- inv_info->cache & IOMMU_CACHE_INV_TYPE_DEV_IOTLB) {
+ } else if (inv_info->cache & IOMMU_CACHE_INV_TYPE_PASID) {
+ if (inv_info->granularity == IOMMU_INV_GRANU_PASID) {
+ struct iommu_inv_pasid_info *info =
+ &inv_info->granu.pasid_info;
+
+ if (!info->flags & IOMMU_INV_PASID_FLAGS_PASID)
+ return -EINVAL;
+
+ arm_smmu_sync_cd(smmu_domain, info->pasid, true);
+ } else {
+ return -ENOENT;
+ }
+ } else { /* IOMMU_CACHE_INV_TYPE_DEV_IOTLB */
return -ENOENT;
}
return 0;
--
2.21.3