[PATCH 5.5 087/150] KVM: nVMX: Dont emulate instructions in guest mode
From: Greg Kroah-Hartman
Date: Thu Feb 27 2020 - 09:22:04 EST
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
commit 07721feee46b4b248402133228235318199b05ec upstream.
vmx_check_intercept is not yet fully implemented. To avoid emulating
instructions disallowed by the L1 hypervisor, refuse to emulate
instructions by default.
Cc: stable@xxxxxxxxxxxxxxx
[Made commit, added commit msg - Oliver]
Signed-off-by: Oliver Upton <oupton@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/vmx/vmx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7165,7 +7165,7 @@ static int vmx_check_intercept(struct kv
}
/* TODO: check more intercepts... */
- return X86EMUL_CONTINUE;
+ return X86EMUL_UNHANDLEABLE;
}
#ifdef CONFIG_X86_64