KVM: PPC: Book3S: PR: Handle EMUL_ASSIST

In addition to normal "priviledged instruction" traps, we can also receive
"emulation assist" traps on newer hardware that has the HV bit set.

Handle that one the same way as a privileged instruction, including the
instruction fetching. That way we don't execute old instructions that we
happen to still leave in that field when an emul assist trap comes.

This fixes -M mac99 / -M g3beige on p7 bare metal for me.

Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/book3s_segment.S b/arch/powerpc/kvm/book3s_segment.S
index 0676ae249b9f..012fc9281213 100644
--- a/arch/powerpc/kvm/book3s_segment.S
+++ b/arch/powerpc/kvm/book3s_segment.S
@@ -250,6 +250,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
         beq     ld_last_prev_inst
         cmpwi   r12, BOOK3S_INTERRUPT_ALIGNMENT
         beq-    ld_last_inst
+#ifdef CONFIG_PPC64
+BEGIN_FTR_SECTION
+        cmpwi   r12, BOOK3S_INTERRUPT_H_EMUL_ASSIST
+        beq-    ld_last_inst
+END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
+#endif
 
         b       no_ld_last_inst