KVM: x86: clean up reexecute_instruction

Little cleanup for reexecute_instruction, also use gpa_to_gfn in
retry_instruction

Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5483228..f0288c5 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4759,19 +4759,18 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
        if (tdp_enabled)
                return false;
 
+       gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL);
+       if (gpa == UNMAPPED_GVA)
+               return true; /* let cpu generate fault */
+
        /*
         * if emulation was due to access to shadowed page table
         * and it failed try to unshadow page and re-enter the
         * guest to let CPU execute the instruction.
         */
-       if (kvm_mmu_unprotect_page_virt(vcpu, gva))
+       if (kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)))
                return true;
 
-       gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL);
-
-       if (gpa == UNMAPPED_GVA)
-               return true; /* let cpu generate fault */
-
        /*
         * Do not retry the unhandleable instruction if it faults on the
         * readonly host memory, otherwise it will goto a infinite loop:
@@ -4826,7 +4825,7 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
        if (!vcpu->arch.mmu.direct_map)
                gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL);
 
-       kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
+       kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa));
 
        return true;
 }