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_syscall_ret, "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_syscall_ret);
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 }
50
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