1 #include <asm/paravirt.h>
3 DEF_NATIVE(pv_irq_ops
, irq_disable
, "cli");
4 DEF_NATIVE(pv_irq_ops
, irq_enable
, "sti");
5 DEF_NATIVE(pv_irq_ops
, restore_fl
, "push %eax; popf");
6 DEF_NATIVE(pv_irq_ops
, save_fl
, "pushf; pop %eax");
7 DEF_NATIVE(pv_cpu_ops
, iret
, "iret");
8 DEF_NATIVE(pv_mmu_ops
, read_cr2
, "mov %cr2, %eax");
9 DEF_NATIVE(pv_mmu_ops
, write_cr3
, "mov %eax, %cr3");
10 DEF_NATIVE(pv_mmu_ops
, read_cr3
, "mov %cr3, %eax");
12 #if defined(CONFIG_PARAVIRT_SPINLOCKS)
13 DEF_NATIVE(pv_lock_ops
, queued_spin_unlock
, "movb $0, (%eax)");
14 DEF_NATIVE(pv_lock_ops
, vcpu_is_preempted
, "xor %eax, %eax");
17 unsigned paravirt_patch_ident_32(void *insnbuf
, unsigned len
)
19 /* arg in %eax, return in %eax */
23 unsigned paravirt_patch_ident_64(void *insnbuf
, unsigned len
)
25 /* arg in %edx:%eax, return in %edx:%eax */
29 extern bool pv_is_native_spin_unlock(void);
30 extern bool pv_is_native_vcpu_is_preempted(void);
32 unsigned native_patch(u8 type
, u16 clobbers
, void *ibuf
,
33 unsigned long addr
, unsigned len
)
35 const unsigned char *start
, *end
;
38 #define PATCH_SITE(ops, x) \
39 case PARAVIRT_PATCH(ops.x): \
40 start = start_##ops##_##x; \
41 end = end_##ops##_##x; \
44 PATCH_SITE(pv_irq_ops
, irq_disable
);
45 PATCH_SITE(pv_irq_ops
, irq_enable
);
46 PATCH_SITE(pv_irq_ops
, restore_fl
);
47 PATCH_SITE(pv_irq_ops
, save_fl
);
48 PATCH_SITE(pv_cpu_ops
, iret
);
49 PATCH_SITE(pv_mmu_ops
, read_cr2
);
50 PATCH_SITE(pv_mmu_ops
, read_cr3
);
51 PATCH_SITE(pv_mmu_ops
, write_cr3
);
52 #if defined(CONFIG_PARAVIRT_SPINLOCKS)
53 case PARAVIRT_PATCH(pv_lock_ops
.queued_spin_unlock
):
54 if (pv_is_native_spin_unlock()) {
55 start
= start_pv_lock_ops_queued_spin_unlock
;
56 end
= end_pv_lock_ops_queued_spin_unlock
;
61 case PARAVIRT_PATCH(pv_lock_ops
.vcpu_is_preempted
):
62 if (pv_is_native_vcpu_is_preempted()) {
63 start
= start_pv_lock_ops_vcpu_is_preempted
;
64 end
= end_pv_lock_ops_vcpu_is_preempted
;
71 patch_default
: __maybe_unused
72 ret
= paravirt_patch_default(type
, clobbers
, ibuf
, addr
, len
);
76 ret
= paravirt_patch_insns(ibuf
, len
, start
, end
);