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iommu/amd: Add support for IOMMUv2 domain mode

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This patch adds support for protection domains that
implement two-level paging for devices.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2011-11-17 17:24:28 +01:00
parent 132bd68f18
commit 52815b7568
5 changed files with 180 additions and 5 deletions
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9
drivers/iommu/amd_iommu_init.c
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@@ -755,6 +755,7 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu)
iommu->features = ((u64)high << 32) | low;
if (iommu_feature(iommu, FEATURE_GT)) {
int glxval;
u32 pasids;
u64 shift;
@@ -763,6 +764,14 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu)
pasids = (1 << shift);
amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids);
glxval = iommu->features & FEATURE_GLXVAL_MASK;
glxval >>= FEATURE_GLXVAL_SHIFT;
if (amd_iommu_max_glx_val == -1)
amd_iommu_max_glx_val = glxval;
else
amd_iommu_max_glx_val = min(amd_iommu_max_glx_val, glxval);
}
if (iommu_feature(iommu, FEATURE_GT) &&