From mboxrd@z Thu Jan 1 00:00:00 1970 From: Junaid Shahid Subject: [PATCH 1/4] kvm: x86: mmu: Use symbolic constants for EPT Violation Exit Qualifications Date: Wed, 26 Oct 2016 19:19:42 -0700 Message-ID: <06c553d31bc838c33dc151f3ab038ecee2da305f.1476839873.git.junaids@google.com> References: Cc: pbonzini@redhat.com, andreslc@google.com, pfeiner@google.com To: kvm@vger.kernel.org Return-path: Received: from mail-pf0-f172.google.com ([209.85.192.172]:34381 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932708AbcJ0CTs (ORCPT ); Wed, 26 Oct 2016 22:19:48 -0400 Received: by mail-pf0-f172.google.com with SMTP id n85so7319873pfi.1 for ; Wed, 26 Oct 2016 19:19:48 -0700 (PDT) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: This change adds some symbolic constants for VM Exit Qualifications related to EPT Violations and updates handle_ept_violation() to use these constants instead of hard-coded numbers. Signed-off-by: Junaid Shahid --- arch/x86/include/asm/vmx.h | 16 ++++++++++++++++ arch/x86/kvm/vmx.c | 20 ++++++++++++-------- 2 files changed, 28 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index a002b07..60991fb 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -465,6 +465,22 @@ struct vmx_msr_entry { #define ENTRY_FAIL_VMCS_LINK_PTR 4 /* + * Exit Qualifications for EPT Violations + */ +#define EPT_VIOLATION_READ_BIT 0 +#define EPT_VIOLATION_WRITE_BIT 1 +#define EPT_VIOLATION_INSTR_BIT 2 +#define EPT_VIOLATION_READABLE_BIT 3 +#define EPT_VIOLATION_WRITABLE_BIT 4 +#define EPT_VIOLATION_EXECUTABLE_BIT 5 +#define EPT_VIOLATION_READ (1 << EPT_VIOLATION_READ_BIT) +#define EPT_VIOLATION_WRITE (1 << EPT_VIOLATION_WRITE_BIT) +#define EPT_VIOLATION_INSTR (1 << EPT_VIOLATION_INSTR_BIT) +#define EPT_VIOLATION_READABLE (1 << EPT_VIOLATION_READABLE_BIT) +#define EPT_VIOLATION_WRITABLE (1 << EPT_VIOLATION_WRITABLE_BIT) +#define EPT_VIOLATION_EXECUTABLE (1 << EPT_VIOLATION_EXECUTABLE_BIT) + +/* * VM-instruction error numbers */ enum vm_instruction_error_number { diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index cf1b16d..859da8e 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6170,14 +6170,18 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu) gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); trace_kvm_page_fault(gpa, exit_qualification); - /* it is a read fault? */ - error_code = (exit_qualification << 2) & PFERR_USER_MASK; - /* it is a write fault? */ - error_code |= exit_qualification & PFERR_WRITE_MASK; - /* It is a fetch fault? */ - error_code |= (exit_qualification << 2) & PFERR_FETCH_MASK; - /* ept page table is present? */ - error_code |= (exit_qualification & 0x38) != 0; + /* Is it a read fault? */ + error_code = ((exit_qualification >> EPT_VIOLATION_READ_BIT) & 1) + << PFERR_USER_BIT; + /* Is it a write fault? */ + error_code |= ((exit_qualification >> EPT_VIOLATION_WRITE_BIT) & 1) + << PFERR_WRITE_BIT; + /* Is it a fetch fault? */ + error_code |= ((exit_qualification >> EPT_VIOLATION_INSTR_BIT) & 1) + << PFERR_FETCH_BIT; + /* ept page table entry is present? */ + error_code |= ((exit_qualification >> EPT_VIOLATION_READABLE_BIT) & 1) + << PFERR_PRESENT_BIT; vcpu->arch.exit_qualification = exit_qualification; -- 2.8.0.rc3.226.g39d4020