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

Message ID 20230127112932.38045-22-steven.price@arm.com (mailing list archive)
State New, archived
Headers show
Series [RFC,01/28] arm64: RME: Handle Granule Protection Faults (GPFs) | expand

Commit Message

Steven Price Jan. 27, 2023, 11:29 a.m. UTC 
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@arm.com>
---
 arch/arm64/kvm/inject_fault.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

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