aboutsummaryrefslogtreecommitdiff
path: root/virt/kvm/iommu.c
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm/iommu.c')
-rw-r--r--virt/kvm/iommu.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index e9fff9830bf..037cb6730e6 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -42,13 +42,13 @@ static int kvm_iommu_unmap_memslots(struct kvm *kvm);
static void kvm_iommu_put_pages(struct kvm *kvm,
gfn_t base_gfn, unsigned long npages);
-static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot,
- gfn_t gfn, unsigned long size)
+static pfn_t kvm_pin_pages(struct kvm_memory_slot *slot, gfn_t gfn,
+ unsigned long size)
{
gfn_t end_gfn;
pfn_t pfn;
- pfn = gfn_to_pfn_memslot(kvm, slot, gfn);
+ pfn = gfn_to_pfn_memslot(slot, gfn);
end_gfn = gfn + (size >> PAGE_SHIFT);
gfn += 1;
@@ -56,7 +56,7 @@ static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot,
return pfn;
while (gfn < end_gfn)
- gfn_to_pfn_memslot(kvm, slot, gfn++);
+ gfn_to_pfn_memslot(slot, gfn++);
return pfn;
}
@@ -105,7 +105,7 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
* Pin all pages we are about to map in memory. This is
* important because we unmap and unpin in 4kb steps later.
*/
- pfn = kvm_pin_pages(kvm, slot, gfn, page_size);
+ pfn = kvm_pin_pages(slot, gfn, page_size);
if (is_error_pfn(pfn)) {
gfn += 1;
continue;
@@ -300,6 +300,12 @@ static void kvm_iommu_put_pages(struct kvm *kvm,
/* Get physical address */
phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
+
+ if (!phys) {
+ gfn++;
+ continue;
+ }
+
pfn = phys >> PAGE_SHIFT;
/* Unmap address from IO address space */