handle_ept_violation() does not pass error code to
the handler tdp_page_fault().
It means tdp_page_fault() handles the page fault with ignoring
the error code, It will not handle the page fault completely correctly,
and may causes endless page fault.
{
But because there is another bad code in the kvm, This endless page faulting
never occur. The bad code: kvm always set pte writable.
negative * negative = positive, WTF!!
Next patch will fix this bad code.
}
Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
---
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c7565ea..6362dcc 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3470,7 +3470,7 @@ 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 & PAGE_MASK, 0);
+ return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, exit_qualification);
}
static u64 ept_rsvd_mask(u64 spte, int level)
--
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