KVM: MMU: cleanup pte write path

This patch does:
- call vcpu->arch.mmu.update_pte directly
- use gfn_to_pfn_atomic in update_pte path

The suggestion is from Avi.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f08314f303e0..c8af0991fdf0 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -255,6 +255,8 @@ struct kvm_mmu {
         int (*sync_page)(struct kvm_vcpu *vcpu,
                          struct kvm_mmu_page *sp);
         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
+        void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
+                        u64 *spte, const void *pte, unsigned long mmu_seq);
         hpa_t root_hpa;
         int root_level;
         int shadow_root_level;
@@ -335,11 +337,6 @@ struct kvm_vcpu_arch {
         u64  *last_pte_updated;
         gfn_t last_pte_gfn;
 
-        struct {
-                pfn_t pfn;      /* pfn corresponding to that gfn */
-                unsigned long mmu_seq;
-        } update_pte;
-
         struct fpu guest_fpu;
         u64 xcr0;