[PATCH 1/5] KVM: PPC: Book3S: PR: Handle EMUL_ASSIST

[Alexander Graf <agraf@suse.de>]

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>
---
 arch/powerpc/kvm/book3s_segment.S |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_segment.S b/arch/powerpc/kvm/book3s_segment.S
index 0676ae2..012fc92 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
 
-- 
1.6.0.2