1 // SPDX-License-Identifier: GPL-2.0
2 #include <asm/paravirt.h>
3 #include <asm/asm-offsets.h>
4 #include <linux/stringify.h>
6 DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
7 DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
8 DEF_NATIVE(pv_irq_ops, restore_fl, "pushq %rdi; popfq");
9 DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax");
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, wbinvd, "wbinvd");
16 DEF_NATIVE(pv_cpu_ops, usergs_sysret64, "swapgs; sysretq");
17 DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs");
19 DEF_NATIVE(, mov32, "mov %edi, %eax");
20 DEF_NATIVE(, mov64, "mov %rdi, %rax");
22 #if defined(CONFIG_PARAVIRT_SPINLOCKS)
23 DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%rdi)");
24 DEF_NATIVE(pv_lock_ops, vcpu_is_preempted, "xor %rax, %rax");
27 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
29 return paravirt_patch_insns(insnbuf, len,
30 start__mov32, end__mov32);
33 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
35 return paravirt_patch_insns(insnbuf, len,
36 start__mov64, end__mov64);
39 extern bool pv_is_native_spin_unlock(void);
40 extern bool pv_is_native_vcpu_is_preempted(void);
42 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
43 unsigned long addr, unsigned len)
45 const unsigned char *start, *end;
48 #define PATCH_SITE(ops, x) \
49 case PARAVIRT_PATCH(ops.x): \
50 start = start_##ops##_##x; \
51 end = end_##ops##_##x; \
54 PATCH_SITE(pv_irq_ops, restore_fl);
55 PATCH_SITE(pv_irq_ops, save_fl);
56 PATCH_SITE(pv_irq_ops, irq_enable);
57 PATCH_SITE(pv_irq_ops, irq_disable);
58 PATCH_SITE(pv_cpu_ops, usergs_sysret64);
59 PATCH_SITE(pv_cpu_ops, swapgs);
60 PATCH_SITE(pv_mmu_ops, read_cr2);
61 PATCH_SITE(pv_mmu_ops, read_cr3);
62 PATCH_SITE(pv_mmu_ops, write_cr3);
63 PATCH_SITE(pv_mmu_ops, flush_tlb_single);
64 PATCH_SITE(pv_cpu_ops, wbinvd);
65 #if defined(CONFIG_PARAVIRT_SPINLOCKS)
66 case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
67 if (pv_is_native_spin_unlock()) {
68 start = start_pv_lock_ops_queued_spin_unlock;
69 end = end_pv_lock_ops_queued_spin_unlock;
74 case PARAVIRT_PATCH(pv_lock_ops.vcpu_is_preempted):
75 if (pv_is_native_vcpu_is_preempted()) {
76 start = start_pv_lock_ops_vcpu_is_preempted;
77 end = end_pv_lock_ops_vcpu_is_preempted;
84 patch_default: __maybe_unused
85 ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
89 ret = paravirt_patch_insns(ibuf, len, start, end);