| Date | Fri, 13 Apr 2012 18:13:54 +0800 | From | Xiao Guangrong <> | Subject | [PATCH v2 09/16] KVM: MMU: fast mmu_need_write_protect path for hard mmu |
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On direct mmu without nested, all the page is not write-protected by shadow page table protection
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 53e92de..0c6e92d 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2293,6 +2293,9 @@ 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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