KVM: PPC: Make BAT only guest segments work
When a guest sets its SR entry to invalid, we may still find a
corresponding entry in a BAT. So we need to make sure we're not
faulting on invalid SR entries, but instead just claim them to be
BAT resolved.
This resolves breakage experienced when using libogc based guests.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/kvm/book3s_32_mmu.c b/arch/powerpc/kvm/book3s_32_mmu.c
index 0b10503..3292d76 100644
--- a/arch/powerpc/kvm/book3s_32_mmu.c
+++ b/arch/powerpc/kvm/book3s_32_mmu.c
@@ -354,10 +354,10 @@
*vsid = VSID_REAL_DR | gvsid;
break;
case MSR_DR|MSR_IR:
- if (!sr->valid)
- return -1;
-
- *vsid = sr->vsid;
+ if (sr->valid)
+ *vsid = sr->vsid;
+ else
+ *vsid = VSID_BAT | gvsid;
break;
default:
BUG();