KVM: iommu: fix releasing unmapped page
There are two bugs:
- the 'error page' is forgot to be released
[ it is unneeded after commit a2766325cf
, for backport, we
still do kvm_release_pfn_clean for the error pfn ]
- guest pages are always released regardless of the unmapped page
(e,g, caused by hwpoison)
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Родитель
d89cc617b9
Коммит
16b854c889
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@ -107,6 +107,7 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
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*/
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pfn = kvm_pin_pages(slot, gfn, page_size);
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if (is_error_pfn(pfn)) {
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kvm_release_pfn_clean(pfn);
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gfn += 1;
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continue;
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}
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@ -300,6 +301,12 @@ static void kvm_iommu_put_pages(struct kvm *kvm,
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/* Get physical address */
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phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
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if (!phys) {
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gfn++;
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continue;
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}
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pfn = phys >> PAGE_SHIFT;
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/* Unmap address from IO address space */
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