Linux 4.6-rc6
[linux/fpc-iii.git] / arch / x86 / kernel / paravirt_patch_32.c
blob158dc0650d5dfac1b8755910b30612d6cbb9fdbb
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");
11 DEF_NATIVE(pv_cpu_ops, clts, "clts");
13 #if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_SPINLOCKS)
14 DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%eax)");
15 #endif
17 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
19 /* arg in %eax, return in %eax */
20 return 0;
23 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
25 /* arg in %edx:%eax, return in %edx:%eax */
26 return 0;
29 extern bool pv_is_native_spin_unlock(void);
31 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
32 unsigned long addr, unsigned len)
34 const unsigned char *start, *end;
35 unsigned ret;
37 #define PATCH_SITE(ops, x) \
38 case PARAVIRT_PATCH(ops.x): \
39 start = start_##ops##_##x; \
40 end = end_##ops##_##x; \
41 goto patch_site
42 switch (type) {
43 PATCH_SITE(pv_irq_ops, irq_disable);
44 PATCH_SITE(pv_irq_ops, irq_enable);
45 PATCH_SITE(pv_irq_ops, restore_fl);
46 PATCH_SITE(pv_irq_ops, save_fl);
47 PATCH_SITE(pv_cpu_ops, iret);
48 PATCH_SITE(pv_mmu_ops, read_cr2);
49 PATCH_SITE(pv_mmu_ops, read_cr3);
50 PATCH_SITE(pv_mmu_ops, write_cr3);
51 PATCH_SITE(pv_cpu_ops, clts);
52 #if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_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;
57 goto patch_site;
59 #endif
61 default:
62 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
63 break;
65 patch_site:
66 ret = paravirt_patch_insns(ibuf, len, start, end);
67 break;
69 #undef PATCH_SITE
70 return ret;