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Subject[PATCH v13 15/15] iommu/smmuv3: Add PASID cache invalidation per PASID
Date
In order to cascade guest CFGI_CD, let's add PASID cache invalidation
per PASID.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v12 -> v13:
- Fix !(info->flags & IOMMU_INV_PASID_FLAGS_PASID) check
---
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 ed64699a4a0d..45adfe4da11b 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2999,9 +2999,19 @@ 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
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