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authorIzik Eidus <ieidus@redhat.com>2008-10-03 17:40:32 +0300
committerAvi Kivity <avi@redhat.com>2008-12-31 16:51:50 +0200
commit2843099fee32a6020e1caa95c6026f28b5d43bff (patch)
tree774ddfeec4091adddf9bd9ce938648dad14c378e /virt
parent6eb55818c043b097c83828da8430fcb9a02fdb89 (diff)
downloadlinux-linaro-stable-2843099fee32a6020e1caa95c6026f28b5d43bff.tar.gz
KVM: MMU: Fix aliased gfns treated as unaliased
Some areas of kvm x86 mmu are using gfn offset inside a slot without unaliasing the gfn first. This patch makes sure that the gfn will be unaliased and add gfn_to_memslot_unaliased() to save the calculating of the gfn unaliasing in case we have it unaliased already. Signed-off-by: Izik Eidus <ieidus@redhat.com> Acked-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 1838052f3c9e..a65baa9039d5 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -923,7 +923,7 @@ int kvm_is_error_hva(unsigned long addr)
}
EXPORT_SYMBOL_GPL(kvm_is_error_hva);
-static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn)
{
int i;
@@ -936,11 +936,12 @@ static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
}
return NULL;
}
+EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased);
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
{
gfn = unalias_gfn(kvm, gfn);
- return __gfn_to_memslot(kvm, gfn);
+ return gfn_to_memslot_unaliased(kvm, gfn);
}
int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
@@ -964,7 +965,7 @@ unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
struct kvm_memory_slot *slot;
gfn = unalias_gfn(kvm, gfn);
- slot = __gfn_to_memslot(kvm, gfn);
+ slot = gfn_to_memslot_unaliased(kvm, gfn);
if (!slot)
return bad_hva();
return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
@@ -1215,7 +1216,7 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
struct kvm_memory_slot *memslot;
gfn = unalias_gfn(kvm, gfn);
- memslot = __gfn_to_memslot(kvm, gfn);
+ memslot = gfn_to_memslot_unaliased(kvm, gfn);
if (memslot && memslot->dirty_bitmap) {
unsigned long rel_gfn = gfn - memslot->base_gfn;