Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-3.10.git] / arch / x86 / kernel / paravirt_patch_32.c
1 #include <asm/paravirt.h>
2
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_cpu_ops, irq_enable_sysexit, "sti; sysexit");
9 DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax");
10 DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3");
11 DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax");
12 DEF_NATIVE(pv_cpu_ops, clts, "clts");
13 DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc");
14
15 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
16 {
17         /* arg in %eax, return in %eax */
18         return 0;
19 }
20
21 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
22 {
23         /* arg in %edx:%eax, return in %edx:%eax */
24         return 0;
25 }
26
27 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
28                       unsigned long addr, unsigned len)
29 {
30         const unsigned char *start, *end;
31         unsigned ret;
32
33 #define PATCH_SITE(ops, x)                                      \
34                 case PARAVIRT_PATCH(ops.x):                     \
35                         start = start_##ops##_##x;              \
36                         end = end_##ops##_##x;                  \
37                         goto patch_site
38         switch (type) {
39                 PATCH_SITE(pv_irq_ops, irq_disable);
40                 PATCH_SITE(pv_irq_ops, irq_enable);
41                 PATCH_SITE(pv_irq_ops, restore_fl);
42                 PATCH_SITE(pv_irq_ops, save_fl);
43                 PATCH_SITE(pv_cpu_ops, iret);
44                 PATCH_SITE(pv_cpu_ops, irq_enable_sysexit);
45                 PATCH_SITE(pv_mmu_ops, read_cr2);
46                 PATCH_SITE(pv_mmu_ops, read_cr3);
47                 PATCH_SITE(pv_mmu_ops, write_cr3);
48                 PATCH_SITE(pv_cpu_ops, clts);
49                 PATCH_SITE(pv_cpu_ops, read_tsc);
50
51         patch_site:
52                 ret = paravirt_patch_insns(ibuf, len, start, end);
53                 break;
54
55         default:
56                 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
57                 break;
58         }
59 #undef PATCH_SITE
60         return ret;
61 }