Messages in this thread Patch in this message | | | Date | Wed, 25 Apr 2012 12:02:01 +0800 | From | Xiao Guangrong <> | Subject | [PATCH v4 03/10] KVM: VMX: export PFEC.P bit on ept |
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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 52f6856..2c98057 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4735,6 +4735,7 @@ 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); @@ -4759,7 +4760,13 @@ 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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