[PATCH] KVM: PPC: Fix contents of SRR1 when injecting a program exception in kvm-pr

[Thomas Huth <thuth@redhat.com>]

vcpu->arch.shadow_srr1 only contains usable values for injecting
a program exception into the guest if we entered the function
kvmppc_handle_exit_pr() with exit_nr == BOOK3S_INTERRUPT_PROGRAM.
In other cases, the shadow_srr1 bits are zero. Since we want to
pass an illegal-instruction program check to the guest, set
"flags" to SRR1_PROGILL for these other cases.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 arch/powerpc/kvm/book3s_pr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 95bceca..b12e80a 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -1031,7 +1031,10 @@ int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 		int emul;
 
 program_interrupt:
-		flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
+		if (exit_nr == BOOK3S_INTERRUPT_PROGRAM)
+			flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
+		else
+			flags = SRR1_PROGILL;
 
 		emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 		if (emul != EMULATE_DONE) {
-- 
1.8.3.1