Commit | Line | Data |
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53fd13cf GOC |
1 | #include <asm/paravirt.h> |
2 | #include <asm/asm-offsets.h> | |
8a650ce2 | 3 | #include <linux/stringify.h> |
53fd13cf GOC |
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 | /* the three commands give us more control to how to return from a syscall */ | |
18 | DEF_NATIVE(pv_cpu_ops, irq_enable_syscall_ret, "movq %gs:" __stringify(pda_oldrsp) ", %rsp; swapgs; sysretq;"); | |
19 | DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs"); | |
20 | ||
21 | unsigned native_patch(u8 type, u16 clobbers, void *ibuf, | |
22 | unsigned long addr, unsigned len) | |
23 | { | |
24 | const unsigned char *start, *end; | |
25 | unsigned ret; | |
26 | ||
27 | #define PATCH_SITE(ops, x) \ | |
28 | case PARAVIRT_PATCH(ops.x): \ | |
29 | start = start_##ops##_##x; \ | |
30 | end = end_##ops##_##x; \ | |
31 | goto patch_site | |
32 | switch(type) { | |
33 | PATCH_SITE(pv_irq_ops, restore_fl); | |
34 | PATCH_SITE(pv_irq_ops, save_fl); | |
35 | PATCH_SITE(pv_irq_ops, irq_enable); | |
36 | PATCH_SITE(pv_irq_ops, irq_disable); | |
37 | PATCH_SITE(pv_cpu_ops, iret); | |
38 | PATCH_SITE(pv_cpu_ops, irq_enable_syscall_ret); | |
39 | PATCH_SITE(pv_cpu_ops, swapgs); | |
40 | PATCH_SITE(pv_mmu_ops, read_cr2); | |
41 | PATCH_SITE(pv_mmu_ops, read_cr3); | |
42 | PATCH_SITE(pv_mmu_ops, write_cr3); | |
43 | PATCH_SITE(pv_cpu_ops, clts); | |
44 | PATCH_SITE(pv_mmu_ops, flush_tlb_single); | |
45 | PATCH_SITE(pv_cpu_ops, wbinvd); | |
46 | ||
47 | patch_site: | |
48 | ret = paravirt_patch_insns(ibuf, len, start, end); | |
49 | break; | |
50 | ||
51 | default: | |
52 | ret = paravirt_patch_default(type, clobbers, ibuf, addr, len); | |
53 | break; | |
54 | } | |
55 | #undef PATCH_SITE | |
56 | return ret; | |
57 | } |