From 20bd40dc6492da293993559555df07d467fd202e Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Mon, 27 Sep 2010 18:03:27 +0800 Subject: [PATCH] KVM: MMU: cleanup for error mask set while walk guest page table Small cleanup for set page fault error code Signed-off-by: Xiao Guangrong Signed-off-by: Avi Kivity --- arch/x86/kvm/paging_tmpl.h | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 2bdd843..a83ff37 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -224,9 +224,7 @@ walk: is_cpuid_PSE36()) gfn += pse36_gfn_delta(pte); - access |= write_fault ? PFERR_WRITE_MASK : 0; - access |= fetch_fault ? PFERR_FETCH_MASK : 0; - access |= user_fault ? PFERR_USER_MASK : 0; + access |= write_fault | fetch_fault | user_fault; real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(gfn), access); @@ -268,10 +266,9 @@ error: walker->error_code = 0; if (present) walker->error_code |= PFERR_PRESENT_MASK; - if (write_fault) - walker->error_code |= PFERR_WRITE_MASK; - if (user_fault) - walker->error_code |= PFERR_USER_MASK; + + walker->error_code |= write_fault | user_fault; + if (fetch_fault && mmu->nx) walker->error_code |= PFERR_FETCH_MASK; if (rsvd_fault) @@ -673,9 +670,9 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access, int r; r = FNAME(walk_addr)(&walker, vcpu, vaddr, - !!(access & PFERR_WRITE_MASK), - !!(access & PFERR_USER_MASK), - !!(access & PFERR_FETCH_MASK)); + access & PFERR_WRITE_MASK, + access & PFERR_USER_MASK, + access & PFERR_FETCH_MASK); if (r) { gpa = gfn_to_gpa(walker.gfn); -- 2.7.4