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    Subject[PATCH v7 04/10] KVM: VMX: export PFEC.P bit on ept
    Export the present bit of page fault error code, the later patch
    will use it

    Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
    ---
    arch/x86/kvm/vmx.c | 9 ++++++++-
    1 files changed, 8 insertions(+), 1 deletions(-)

    diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
    index eeeb4a2..a44c649 100644
    --- a/arch/x86/kvm/vmx.c
    +++ b/arch/x86/kvm/vmx.c
    @@ -4829,6 +4829,7 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
    {
    unsigned long exit_qualification;
    gpa_t gpa;
    + u32 error_code;
    int gla_validity;

    exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
    @@ -4853,7 +4854,13 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)

    gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
    trace_kvm_page_fault(gpa, exit_qualification);
    - return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0);
    +
    + /* It is a write fault? */
    + error_code = exit_qualification & (1U << 1);
    + /* ept page table is present? */
    + error_code |= (exit_qualification >> 3) & 0x1;
    +
    + return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0);
    }

    static u64 ept_rsvd_mask(u64 spte, int level)
    --
    1.7.7.6


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