From: Mihai DONTU <mdontu@xxxxxxxxxxxxxxx>
Inform the guest introspection tool that the exception (from a previous
KVMI_INJECT_EXCEPTION command) was not successfully injected.
It can happen for the introspection tool to queue a pagefault but have
it overwritten by an interrupt picked up during guest reentry.
kvmi_trap_event() is used to inform the tool when such a situation has
been detected.
Signed-off-by: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6d5f801e4797..64572f7ec689 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7773,6 +7773,9 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
}
}
+ if (kvmi_lost_exception(vcpu))
+ kvmi_trap_event(vcpu);
+
r = kvm_mmu_reload(vcpu);
if (unlikely(r)) {
goto cancel_injection;
