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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-05-12 18:55:44 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-06-10 11:48:54 +0300 |
| commit | b43b1901ad282aeb74161837fb403927102687a1 (patch) | |
| tree | 43b1b4537e620ce5c148e739c7588a279e76d7a5 | |
| parent | 7c8a83b75a38a807d37f5a4398eca2a42c8cf513 (diff) | |
KVM: take mmu_lock when updating a deleted slot
kvm_handle_hva relies on mmu_lock protection to safely access
the memslot structures.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 687d113a3e5..5fed9bfc3cf 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1210,8 +1210,10 @@ int __kvm_set_memory_region(struct kvm *kvm, kvm_free_physmem_slot(&old, npages ? &new : NULL); /* Slot deletion case: we have to update the current slot */ + spin_lock(&kvm->mmu_lock); if (!npages) *memslot = old; + spin_unlock(&kvm->mmu_lock); #ifdef CONFIG_DMAR /* map the pages in iommu page table */ r = kvm_iommu_map_pages(kvm, base_gfn, npages); |