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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>
This commit is contained in:
Alexander Graf 2010-07-29 14:48:00 +02:00 committed by Avi Kivity
parent d1293c9275
commit d1290b15e7
1 changed files with 12 additions and 0 deletions
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12
arch/powerpc/kernel/kvm.c
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@ -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 @@ static void kvm_patch_ins_stw(u32 *inst, long addr, u32 rt)
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 @@ static void kvm_check_ins(u32 *inst)
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) {