The IVRS ACPI table specifies maximum address sizes for I/O virtual
addresses. When allocating new protection domains that perform
translation, propagate these limits as the domain's geometry / aperture.
Based on prior work by Marius Hillenbrand.
Signed-off-by: Sebastian Ott <seb...@amazon.de>
---
drivers/iommu/amd_iommu.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index fb4a44550c4a..d2e79e27778e 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2460,6 +2460,7 @@ static struct protection_domain
*protection_domain_alloc(void)
static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
{
+ dma_addr_t max_va = DMA_BIT_MASK(amd_iommu_ivrs_va_size);
struct protection_domain *pdomain;
u64 *pt_root, root;
@@ -2477,11 +2478,6 @@ static struct iommu_domain
*amd_iommu_domain_alloc(unsigned type)
root = amd_iommu_domain_encode_pgtable(pt_root,
PAGE_MODE_3_LEVEL);
atomic64_set(&pdomain->pt_root, root);
-
- pdomain->domain.geometry.aperture_start = 0;
- pdomain->domain.geometry.aperture_end = ~0ULL;
- pdomain->domain.geometry.force_aperture = true;
-
break;
case IOMMU_DOMAIN_DMA:
pdomain = dma_ops_domain_alloc();
@@ -2501,6 +2497,10 @@ static struct iommu_domain
*amd_iommu_domain_alloc(unsigned type)
return NULL;
}
+ pdomain->domain.geometry.aperture_start = 0;
+ pdomain->domain.geometry.aperture_end = max_va;
+ pdomain->domain.geometry.force_aperture = true;
+
return &pdomain->domain;
}
--
2.17.1
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Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
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