Merge branch 'linus' into cpus4096
[linux-2.6] / 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 native_patch(u8 type, u16 clobbers, void *ibuf,
16                       unsigned long addr, unsigned len)
17 {
18         const unsigned char *start, *end;
19         unsigned ret;
20
21 #define PATCH_SITE(ops, x)                                      \
22                 case PARAVIRT_PATCH(ops.x):                     \
23                         start = start_##ops##_##x;              \
24                         end = end_##ops##_##x;                  \
25                         goto patch_site
26         switch(type) {
27                 PATCH_SITE(pv_irq_ops, irq_disable);
28                 PATCH_SITE(pv_irq_ops, irq_enable);
29                 PATCH_SITE(pv_irq_ops, restore_fl);
30                 PATCH_SITE(pv_irq_ops, save_fl);
31                 PATCH_SITE(pv_cpu_ops, iret);
32                 PATCH_SITE(pv_cpu_ops, irq_enable_sysexit);
33                 PATCH_SITE(pv_mmu_ops, read_cr2);
34                 PATCH_SITE(pv_mmu_ops, read_cr3);
35                 PATCH_SITE(pv_mmu_ops, write_cr3);
36                 PATCH_SITE(pv_cpu_ops, clts);
37                 PATCH_SITE(pv_cpu_ops, read_tsc);
38
39         patch_site:
40                 ret = paravirt_patch_insns(ibuf, len, start, end);
41                 break;
42
43         default:
44                 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
45                 break;
46         }
47 #undef PATCH_SITE
48         return ret;
49 }