[PATCH v4 03/10] KVM: VMX: export PFEC.P bit on ept

Xiao Guangrong
2012-04-25T04:06:36Z

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