1 #include <asm/paravirt.h>
3 DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
4 DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
5 DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf");
6 DEF_NATIVE(pv_irq_ops, save_fl, "pushf; pop %eax");
7 DEF_NATIVE(pv_cpu_ops, iret, "iret");
8 DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax");
9 DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3");
10 DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax");
12 #if defined(CONFIG_PARAVIRT_SPINLOCKS)
13 DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%eax)");
14 DEF_NATIVE(pv_lock_ops, vcpu_is_preempted, "xor %eax, %eax");
17 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
19 /* arg in %eax, return in %eax */
23 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
25 /* arg in %edx:%eax, return in %edx:%eax */
29 extern bool pv_is_native_spin_unlock(void);
30 extern bool pv_is_native_vcpu_is_preempted(void);
32 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
33 unsigned long addr, unsigned len)
35 const unsigned char *start, *end;
38 #define PATCH_SITE(ops, x) \
39 case PARAVIRT_PATCH(ops.x): \
40 start = start_##ops##_##x; \
41 end = end_##ops##_##x; \
44 PATCH_SITE(pv_irq_ops, irq_disable);
45 PATCH_SITE(pv_irq_ops, irq_enable);
46 PATCH_SITE(pv_irq_ops, restore_fl);
47 PATCH_SITE(pv_irq_ops, save_fl);
48 PATCH_SITE(pv_cpu_ops, iret);
49 PATCH_SITE(pv_mmu_ops, read_cr2);
50 PATCH_SITE(pv_mmu_ops, read_cr3);
51 PATCH_SITE(pv_mmu_ops, write_cr3);
52 #if defined(CONFIG_PARAVIRT_SPINLOCKS)
53 case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
54 if (pv_is_native_spin_unlock()) {
55 start = start_pv_lock_ops_queued_spin_unlock;
56 end = end_pv_lock_ops_queued_spin_unlock;
61 case PARAVIRT_PATCH(pv_lock_ops.vcpu_is_preempted):
62 if (pv_is_native_vcpu_is_preempted()) {
63 start = start_pv_lock_ops_vcpu_is_preempted;
64 end = end_pv_lock_ops_vcpu_is_preempted;
71 patch_default: __maybe_unused
72 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
76 ret = paravirt_patch_insns(ibuf, len, start, end);