1 #include <asm/paravirt.h>
2 #include <asm/asm-offsets.h>
3 #include <linux/stringify.h>
4
5 DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
6 DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
7 DEF_NATIVE(pv_irq_ops, restore_fl, "pushq %rdi; popfq");
8 DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax");
9 DEF_NATIVE(pv_cpu_ops, iret, "iretq");
10 DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax");
11 DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax");
12 DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3");
13 DEF_NATIVE(pv_mmu_ops, flush_tlb_single, "invlpg (%rdi)");
14 DEF_NATIVE(pv_cpu_ops, clts, "clts");
15 DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd");
16
17 DEF_NATIVE(pv_cpu_ops, irq_enable_sysexit, "swapgs; sti; sysexit");
18 DEF_NATIVE(pv_cpu_ops, usergs_sysret64, "swapgs; sysretq");
19 DEF_NATIVE(pv_cpu_ops, usergs_sysret32, "swapgs; sysretl");
20 DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs");
21
native_patch(u8 type,u16 clobbers,void * ibuf,unsigned long addr,unsigned len)22 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
23 unsigned long addr, unsigned len)
24 {
25 const unsigned char *start, *end;
26 unsigned ret;
27
28 #define PATCH_SITE(ops, x) \
29 case PARAVIRT_PATCH(ops.x): \
30 start = start_##ops##_##x; \
31 end = end_##ops##_##x; \
32 goto patch_site
33 switch(type) {
34 PATCH_SITE(pv_irq_ops, restore_fl);
35 PATCH_SITE(pv_irq_ops, save_fl);
36 PATCH_SITE(pv_irq_ops, irq_enable);
37 PATCH_SITE(pv_irq_ops, irq_disable);
38 PATCH_SITE(pv_cpu_ops, iret);
39 PATCH_SITE(pv_cpu_ops, irq_enable_sysexit);
40 PATCH_SITE(pv_cpu_ops, usergs_sysret32);
41 PATCH_SITE(pv_cpu_ops, usergs_sysret64);
42 PATCH_SITE(pv_cpu_ops, swapgs);
43 PATCH_SITE(pv_mmu_ops, read_cr2);
44 PATCH_SITE(pv_mmu_ops, read_cr3);
45 PATCH_SITE(pv_mmu_ops, write_cr3);
46 PATCH_SITE(pv_cpu_ops, clts);
47 PATCH_SITE(pv_mmu_ops, flush_tlb_single);
48 PATCH_SITE(pv_cpu_ops, wbinvd);
49
50 patch_site:
51 ret = paravirt_patch_insns(ibuf, len, start, end);
52 break;
53
54 default:
55 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
56 break;
57 }
58 #undef PATCH_SITE
59 return ret;
60 }
61