[PATCH 18/18] KVM: riscv: add warning if undecoded instruction

[Ben Dooks]

It seems a good idea if we get an undecoded instruction here to
at-least print an error.

Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
---
 arch/riscv/kvm/vcpu_insn.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/kvm/vcpu_insn.c b/arch/riscv/kvm/vcpu_insn.c
index b1edc7b10d7a..ce6ef358c9c2 100644
--- a/arch/riscv/kvm/vcpu_insn.c
+++ b/arch/riscv/kvm/vcpu_insn.c
@@ -557,6 +557,8 @@ int kvm_riscv_vcpu_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run,
 		len = 4;
 		shift = 8 * (sizeof(ulong) - len);
 	} else {
+		pr_err("%s: insn 0x%08lx not decoded at %lx\n",
+		       __func__, insn, vcpu->arch.guest_context.sepc);
 		return -EOPNOTSUPP;
 	}
 
@@ -674,6 +676,8 @@ int kvm_riscv_vcpu_mmio_store(struct kvm_vcpu *vcpu, struct kvm_run *run,
 		len = 4;
 		data32 = GET_RS2C(insn, &vcpu->arch.guest_context);
 	} else {
+		pr_err("%s: insn 0x%08lx not decoded at %lx\n",
+		       __func__, insn, vcpu->arch.guest_context.sepc);
 		return -EOPNOTSUPP;
 	}
 
-- 
2.37.2.352.g3c44437643