Messages in this thread Patch in this message | | | Date | Tue, 17 Jul 2012 21:53:29 +0800 | From | Xiao Guangrong <> | Subject | [PATCH 5/9] KVM: MMU: fask check write-protect for direct mmu |
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If it have no indirect shadow pages we need not protect any gfn, this is always true for direct mmu without nested
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> --- arch/x86/kvm/mmu.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 28b12e2..a846a9c 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2294,6 +2294,9 @@ static int mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn, struct hlist_node *node; bool need_unsync = false;
+ if (!vcpu->kvm->arch.indirect_shadow_pages) + return 0; + for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn, node) { if (!can_unsync) return 1; -- 1.7.7.6
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