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iommu/vt-d: Make sure copied over IR entries are not reused 

Walk over the copied entries and mark the present ones as
allocated.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-06-12 15:06:26 +02:00
parent af3b358e48
commit 7c3c9876d9
1 changed files with 10 additions and 0 deletions
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10
drivers/iommu/intel_irq_remapping.c
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@ -451,6 +451,7 @@ static int iommu_load_old_irte(struct intel_iommu *iommu)
{
struct irte *old_ir_table;
phys_addr_t irt_phys;
unsigned int i;
size_t size;
u64 irta;
@ -481,6 +482,15 @@ static int iommu_load_old_irte(struct intel_iommu *iommu)
__iommu_flush_cache(iommu, iommu->ir_table->base, size);
/*
* Now check the table for used entries and mark those as
* allocated in the bitmap
*/
for (i = 0; i < INTR_REMAP_TABLE_ENTRIES; i++) {
if (iommu->ir_table->base[i].present)
bitmap_set(iommu->ir_table->bitmap, i, 1);
}
return 0;
}