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authorIzik Eidus <ieidus@redhat.com>2009-09-23 21:47:18 +0300
committerAvi Kivity <avi@redhat.com>2009-10-04 17:04:53 +0200
commit3da0dd433dc399a8c0124d0614d82a09b6a49bce (patch)
tree233d2dc2915d996f8ba97321ea8bfe36fbd700f4 /virt
parent1403283acca398e244ece35741ad251c1feb5972 (diff)
downloadvexpress-lsk-3da0dd433dc399a8c0124d0614d82a09b6a49bce.tar.gz
KVM: add support for change_pte mmu notifiers
this is needed for kvm if it want ksm to directly map pages into its shadow page tables. [marcelo: cast pfn assignment to u64] Signed-off-by: Izik Eidus <ieidus@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e79c54034bc..b7c78a403dc 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -850,6 +850,19 @@ static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn,
}
+static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long address,
+ pte_t pte)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+
+ spin_lock(&kvm->mmu_lock);
+ kvm->mmu_notifier_seq++;
+ kvm_set_spte_hva(kvm, address, pte);
+ spin_unlock(&kvm->mmu_lock);
+}
+
static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
@@ -929,6 +942,7 @@ static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
.invalidate_range_start = kvm_mmu_notifier_invalidate_range_start,
.invalidate_range_end = kvm_mmu_notifier_invalidate_range_end,
.clear_flush_young = kvm_mmu_notifier_clear_flush_young,
+ .change_pte = kvm_mmu_notifier_change_pte,
.release = kvm_mmu_notifier_release,
};
#endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */