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intel_iommu: fix iova for pt 

IOMMUTLBEntry.iova is returned incorrectly on one PT path (though mostly
we cannot really trigger this path, even if we do, we are mostly
disgarding this value, so it didn't break anything). Fix it by
converting the VTD_PAGE_MASK into the correct definition
VTD_PAGE_MASK_4K, then remove VTD_PAGE_MASK.

Fixes: b93130 ("intel_iommu: cleanup vtd_{do_}iommu_translate()")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Peter Xu 2017-07-17 17:02:29 +08:00 committed by Michael S. Tsirkin
parent 5df04f1762
commit 892721d91d
2 changed files with 2 additions and 3 deletions
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4
hw/i386/intel_iommu.c
View File

@ -1139,9 +1139,9 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus,
* Also, let's ignore IOTLB caching as well for PT devices.
*/
if (vtd_ce_get_type(&ce) == VTD_CONTEXT_TT_PASS_THROUGH) {
entry->iova = addr & VTD_PAGE_MASK;
entry->iova = addr & VTD_PAGE_MASK_4K;
entry->translated_addr = entry->iova;
entry->addr_mask = VTD_PAGE_MASK;
entry->addr_mask = ~VTD_PAGE_MASK_4K;
entry->perm = IOMMU_RW;
trace_vtd_translate_pt(source_id, entry->iova);

1
hw/i386/intel_iommu_internal.h
View File

@ -384,7 +384,6 @@ typedef struct VTDIOTLBPageInvInfo VTDIOTLBPageInvInfo;
/* Pagesize of VTD paging structures, including root and context tables */
#define VTD_PAGE_SHIFT 12
#define VTD_PAGE_SIZE (1ULL << VTD_PAGE_SHIFT)
#define VTD_PAGE_MASK (VTD_PAGE_SIZE - 1)
#define VTD_PAGE_SHIFT_4K 12
#define VTD_PAGE_MASK_4K (~((1ULL << VTD_PAGE_SHIFT_4K) - 1))