diff options
Diffstat (limited to 'arch/x86/kernel/paravirt_patch_32.c')
| -rw-r--r-- | arch/x86/kernel/paravirt_patch_32.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c index 920c6ae08592..d33ef165b1f8 100644 --- a/arch/x86/kernel/paravirt_patch_32.c +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -8,10 +8,10 @@ DEF_NATIVE(pv_cpu_ops, iret, "iret"); DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax"); DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3"); DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax"); -DEF_NATIVE(pv_cpu_ops, clts, "clts"); #if defined(CONFIG_PARAVIRT_SPINLOCKS) DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%eax)"); +DEF_NATIVE(pv_lock_ops, vcpu_is_preempted, "xor %eax, %eax"); #endif unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len) @@ -27,6 +27,7 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len) } extern bool pv_is_native_spin_unlock(void); +extern bool pv_is_native_vcpu_is_preempted(void); unsigned native_patch(u8 type, u16 clobbers, void *ibuf, unsigned long addr, unsigned len) @@ -48,7 +49,6 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf, PATCH_SITE(pv_mmu_ops, read_cr2); PATCH_SITE(pv_mmu_ops, read_cr3); PATCH_SITE(pv_mmu_ops, write_cr3); - PATCH_SITE(pv_cpu_ops, clts); #if defined(CONFIG_PARAVIRT_SPINLOCKS) case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock): if (pv_is_native_spin_unlock()) { @@ -56,9 +56,19 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf, end = end_pv_lock_ops_queued_spin_unlock; goto patch_site; } + goto patch_default; + + case PARAVIRT_PATCH(pv_lock_ops.vcpu_is_preempted): + if (pv_is_native_vcpu_is_preempted()) { + start = start_pv_lock_ops_vcpu_is_preempted; + end = end_pv_lock_ops_vcpu_is_preempted; + goto patch_site; + } + goto patch_default; #endif default: +patch_default: ret = paravirt_patch_default(type, clobbers, ibuf, addr, len); break; |