1#include <asm/paravirt.h>
2
3DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
4DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
5DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf");
6DEF_NATIVE(pv_irq_ops, save_fl, "pushf; pop %eax");
7DEF_NATIVE(pv_cpu_ops, iret, "iret");
8DEF_NATIVE(pv_cpu_ops, irq_enable_sysexit, "sti; sysexit");
9DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax");
10DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3");
11DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax");
12DEF_NATIVE(pv_cpu_ops, clts, "clts");
13DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc");
14
15unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
16{
17	/* arg in %eax, return in %eax */
18	return 0;
19}
20
21unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
22{
23	/* arg in %edx:%eax, return in %edx:%eax */
24	return 0;
25}
26
27unsigned 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}
62