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_mmu_ops, read_cr2, "movq %cr2, %rax");
10 DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax");
11 DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3");
12 DEF_NATIVE(pv_mmu_ops, flush_tlb_single, "invlpg (%rdi)");
13 DEF_NATIVE(pv_cpu_ops, clts, "clts");
14 DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd");
15
16 DEF_NATIVE(pv_cpu_ops, irq_enable_sysexit, "swapgs; sti; sysexit");
17 DEF_NATIVE(pv_cpu_ops, usergs_sysret64, "swapgs; sysretq");
18 DEF_NATIVE(pv_cpu_ops, usergs_sysret32, "swapgs; sysretl");
19 DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs");
20
21 DEF_NATIVE(, mov32, "mov %edi, %eax");
22 DEF_NATIVE(, mov64, "mov %rdi, %rax");
23
paravirt_patch_ident_32(void * insnbuf,unsigned len)24 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
25 {
26 return paravirt_patch_insns(insnbuf, len,
27 start__mov32, end__mov32);
28 }
29
paravirt_patch_ident_64(void * insnbuf,unsigned len)30 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
31 {
32 return paravirt_patch_insns(insnbuf, len,
33 start__mov64, end__mov64);
34 }
35
native_patch(u8 type,u16 clobbers,void * ibuf,unsigned long addr,unsigned len)36 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
37 unsigned long addr, unsigned len)
38 {
39 const unsigned char *start, *end;
40 unsigned ret;
41
42 #define PATCH_SITE(ops, x) \
43 case PARAVIRT_PATCH(ops.x): \
44 start = start_##ops##_##x; \
45 end = end_##ops##_##x; \
46 goto patch_site
47 switch(type) {
48 PATCH_SITE(pv_irq_ops, restore_fl);
49 PATCH_SITE(pv_irq_ops, save_fl);
50 PATCH_SITE(pv_irq_ops, irq_enable);
51 PATCH_SITE(pv_irq_ops, irq_disable);
52 PATCH_SITE(pv_cpu_ops, irq_enable_sysexit);
53 PATCH_SITE(pv_cpu_ops, usergs_sysret32);
54 PATCH_SITE(pv_cpu_ops, usergs_sysret64);
55 PATCH_SITE(pv_cpu_ops, swapgs);
56 PATCH_SITE(pv_mmu_ops, read_cr2);
57 PATCH_SITE(pv_mmu_ops, read_cr3);
58 PATCH_SITE(pv_mmu_ops, write_cr3);
59 PATCH_SITE(pv_cpu_ops, clts);
60 PATCH_SITE(pv_mmu_ops, flush_tlb_single);
61 PATCH_SITE(pv_cpu_ops, wbinvd);
62
63 patch_site:
64 ret = paravirt_patch_insns(ibuf, len, start, end);
65 break;
66
67 default:
68 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
69 break;
70 }
71 #undef PATCH_SITE
72 return ret;
73 }
74