From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Guangrong Subject: [PATCH 2/7] KVM: MMU: cleanup for error mask set while walk guest page table Date: Mon, 27 Sep 2010 18:03:27 +0800 Message-ID: <4CA06BEF.7060401@cn.fujitsu.com> References: <4CA06BA4.4090303@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , LKML , KVM To: Avi Kivity Return-path: In-Reply-To: <4CA06BA4.4090303@cn.fujitsu.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Small cleanup for set page fault error code Xiao Guangrong --- arch/x86/kvm/paging_tmpl.h | 17 +++++++---------- 1 files 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); -- 1.7.0.4