Commit 452014d2 authored by Nadav Amit's avatar Nadav Amit Committed by Joerg Roedel

iommu/vt-d: Remove unnecassary qi clflushes

According to the manual: "Hardware access to ...  invalidation queue ...
are always coherent."

Remove unnecassary clflushes accordingly.
Signed-off-by: default avatarNadav Amit <namit@vmware.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent ffb2d1eb
...@@ -1167,8 +1167,6 @@ static int qi_check_fault(struct intel_iommu *iommu, int index) ...@@ -1167,8 +1167,6 @@ static int qi_check_fault(struct intel_iommu *iommu, int index)
(unsigned long long)qi->desc[index].high); (unsigned long long)qi->desc[index].high);
memcpy(&qi->desc[index], &qi->desc[wait_index], memcpy(&qi->desc[index], &qi->desc[wait_index],
sizeof(struct qi_desc)); sizeof(struct qi_desc));
__iommu_flush_cache(iommu, &qi->desc[index],
sizeof(struct qi_desc));
writel(DMA_FSTS_IQE, iommu->reg + DMAR_FSTS_REG); writel(DMA_FSTS_IQE, iommu->reg + DMAR_FSTS_REG);
return -EINVAL; return -EINVAL;
} }
...@@ -1243,9 +1241,6 @@ int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu) ...@@ -1243,9 +1241,6 @@ int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu)
hw[wait_index] = wait_desc; hw[wait_index] = wait_desc;
__iommu_flush_cache(iommu, &hw[index], sizeof(struct qi_desc));
__iommu_flush_cache(iommu, &hw[wait_index], sizeof(struct qi_desc));
qi->free_head = (qi->free_head + 2) % QI_LENGTH; qi->free_head = (qi->free_head + 2) % QI_LENGTH;
qi->free_cnt -= 2; qi->free_cnt -= 2;
......
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