[RFC PATCH 21/28] KVM: arm64: WARN on injected undef exceptions

[Steven Price]

The RMM doesn't allow injection of a undefined exception into a realm
guest. Add a WARN to catch if this ever happens.

Signed-off-by: Steven Price <steven.price at arm.com>
---
 arch/arm64/kvm/inject_fault.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kvm/inject_fault.c b/arch/arm64/kvm/inject_fault.c
index f32f4a2a347f..29966a3e5a71 100644
--- a/arch/arm64/kvm/inject_fault.c
+++ b/arch/arm64/kvm/inject_fault.c
@@ -175,6 +175,8 @@ void kvm_inject_size_fault(struct kvm_vcpu *vcpu)
  */
 void kvm_inject_undefined(struct kvm_vcpu *vcpu)
 {
+	if (vcpu_is_rec(vcpu))
+		WARN(1, "Cannot inject undefined exception into REC. Continuing with unknown behaviour");
 	if (vcpu_el1_is_32bit(vcpu))
 		inject_undef32(vcpu);
 	else
-- 
2.34.1