KVM: PPC: PV tlbsync to nop
With our current MMU scheme we don't need to know about the tlbsync instruction.
So we can just nop it out.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 9ec572c..3258922 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -62,6 +62,8 @@
#define KVM_INST_MTSPR_DAR 0x7c1303a6
#define KVM_INST_MTSPR_DSISR 0x7c1203a6
+#define KVM_INST_TLBSYNC 0x7c00046c
+
static bool kvm_patching_worked = true;
static inline void kvm_patch_ins(u32 *inst, u32 new_inst)
@@ -98,6 +100,11 @@
kvm_patch_ins(inst, KVM_INST_STW | rt | (addr & 0x0000fffc));
}
+static void kvm_patch_ins_nop(u32 *inst)
+{
+ kvm_patch_ins(inst, KVM_INST_NOP);
+}
+
static void kvm_map_magic_page(void *data)
{
kvm_hypercall2(KVM_HC_PPC_MAP_MAGIC_PAGE,
@@ -166,6 +173,11 @@
case KVM_INST_MTSPR_DSISR:
kvm_patch_ins_stw(inst, magic_var(dsisr), inst_rt);
break;
+
+ /* Nops */
+ case KVM_INST_TLBSYNC:
+ kvm_patch_ins_nop(inst);
+ break;
}
switch (_inst) {
