1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_PARAVIRT_TYPES_H
3#define _ASM_X86_PARAVIRT_TYPES_H
4
5#ifndef __ASSEMBLY__
6/* These all sit in the .parainstructions section to tell us what to patch. */
7struct paravirt_patch_site {
8 u8 *instr; /* original instructions */
9 u8 type; /* type of this instruction */
10 u8 len; /* length of original instruction */
11};
12#endif
13
14#ifdef CONFIG_PARAVIRT
15
16#ifndef __ASSEMBLY__
17
18#include <asm/desc_defs.h>
19#include <asm/pgtable_types.h>
20#include <asm/nospec-branch.h>
21
22struct page;
23struct thread_struct;
24struct desc_ptr;
25struct tss_struct;
26struct mm_struct;
27struct desc_struct;
28struct task_struct;
29struct cpumask;
30struct flush_tlb_info;
31struct mmu_gather;
32struct vm_area_struct;
33
34/*
35 * Wrapper type for pointers to code which uses the non-standard
36 * calling convention. See PV_CALL_SAVE_REGS_THUNK below.
37 */
38struct paravirt_callee_save {
39 void *func;
40};
41
42/* general info */
43struct pv_info {
44#ifdef CONFIG_PARAVIRT_XXL
45 u16 extra_user_64bit_cs; /* __USER_CS if none */
46#endif
47
48 const char *name;
49};
50
51#ifdef CONFIG_PARAVIRT_XXL
52struct pv_lazy_ops {
53 /* Set deferred update mode, used for batching operations. */
54 void (*enter)(void);
55 void (*leave)(void);
56 void (*flush)(void);
57} __no_randomize_layout;
58#endif
59
60struct pv_cpu_ops {
61 /* hooks for various privileged instructions */
62 void (*io_delay)(void);
63
64#ifdef CONFIG_PARAVIRT_XXL
65 unsigned long (*get_debugreg)(int regno);
66 void (*set_debugreg)(int regno, unsigned long value);
67
68 unsigned long (*read_cr0)(void);
69 void (*write_cr0)(unsigned long);
70
71 void (*write_cr4)(unsigned long);
72
73 /* Segment descriptor handling */
74 void (*load_tr_desc)(void);
75 void (*load_gdt)(const struct desc_ptr *);
76 void (*load_idt)(const struct desc_ptr *);
77 void (*set_ldt)(const void *desc, unsigned entries);
78 unsigned long (*store_tr)(void);
79 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
80 void (*load_gs_index)(unsigned int idx);
81 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
82 const void *desc);
83 void (*write_gdt_entry)(struct desc_struct *,
84 int entrynum, const void *desc, int size);
85 void (*write_idt_entry)(gate_desc *,
86 int entrynum, const gate_desc *gate);
87 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
88 void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
89
90 void (*load_sp0)(unsigned long sp0);
91
92#ifdef CONFIG_X86_IOPL_IOPERM
93 void (*invalidate_io_bitmap)(void);
94 void (*update_io_bitmap)(void);
95#endif
96
97 void (*wbinvd)(void);
98
99 /* cpuid emulation, mostly so that caps bits can be disabled */
100 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
101 unsigned int *ecx, unsigned int *edx);
102
103 /* Unsafe MSR operations. These will warn or panic on failure. */
104 u64 (*read_msr)(unsigned int msr);
105 void (*write_msr)(unsigned int msr, unsigned low, unsigned high);
106
107 /*
108 * Safe MSR operations.
109 * read sets err to 0 or -EIO. write returns 0 or -EIO.
110 */
111 u64 (*read_msr_safe)(unsigned int msr, int *err);
112 int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high);
113
114 u64 (*read_pmc)(int counter);
115
116 void (*start_context_switch)(struct task_struct *prev);
117 void (*end_context_switch)(struct task_struct *next);
118#endif
119} __no_randomize_layout;
120
121struct pv_irq_ops {
122#ifdef CONFIG_PARAVIRT_XXL
123 /*
124 * Get/set interrupt state. save_fl is expected to use X86_EFLAGS_IF;
125 * all other bits returned from save_fl are undefined.
126 *
127 * NOTE: These functions callers expect the callee to preserve
128 * more registers than the standard C calling convention.
129 */
130 struct paravirt_callee_save save_fl;
131 struct paravirt_callee_save irq_disable;
132 struct paravirt_callee_save irq_enable;
133
134 void (*safe_halt)(void);
135 void (*halt)(void);
136#endif
137} __no_randomize_layout;
138
139struct pv_mmu_ops {
140 /* TLB operations */
141 void (*flush_tlb_user)(void);
142 void (*flush_tlb_kernel)(void);
143 void (*flush_tlb_one_user)(unsigned long addr);
144 void (*flush_tlb_multi)(const struct cpumask *cpus,
145 const struct flush_tlb_info *info);
146
147 void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
148
149 /* Hook for intercepting the destruction of an mm_struct. */
150 void (*exit_mmap)(struct mm_struct *mm);
151 void (*notify_page_enc_status_changed)(unsigned long pfn, int npages, bool enc);
152
153#ifdef CONFIG_PARAVIRT_XXL
154 struct paravirt_callee_save read_cr2;
155 void (*write_cr2)(unsigned long);
156
157 unsigned long (*read_cr3)(void);
158 void (*write_cr3)(unsigned long);
159
160 /* Hook for intercepting the creation/use of an mm_struct. */
161 void (*enter_mmap)(struct mm_struct *mm);
162
163 /* Hooks for allocating and freeing a pagetable top-level */
164 int (*pgd_alloc)(struct mm_struct *mm);
165 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);
166
167 /*
168 * Hooks for allocating/releasing pagetable pages when they're
169 * attached to a pagetable
170 */
171 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn);
172 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn);
173 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn);
174 void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn);
175 void (*release_pte)(unsigned long pfn);
176 void (*release_pmd)(unsigned long pfn);
177 void (*release_pud)(unsigned long pfn);
178 void (*release_p4d)(unsigned long pfn);
179
180 /* Pagetable manipulation functions */
181 void (*set_pte)(pte_t *ptep, pte_t pteval);
182 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
183
184 pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr,
185 pte_t *ptep);
186 void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr,
187 pte_t *ptep, pte_t pte);
188
189 struct paravirt_callee_save pte_val;
190 struct paravirt_callee_save make_pte;
191
192 struct paravirt_callee_save pgd_val;
193 struct paravirt_callee_save make_pgd;
194
195 void (*set_pud)(pud_t *pudp, pud_t pudval);
196
197 struct paravirt_callee_save pmd_val;
198 struct paravirt_callee_save make_pmd;
199
200 struct paravirt_callee_save pud_val;
201 struct paravirt_callee_save make_pud;
202
203 void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval);
204
205#if CONFIG_PGTABLE_LEVELS >= 5
206 struct paravirt_callee_save p4d_val;
207 struct paravirt_callee_save make_p4d;
208
209 void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval);
210#endif /* CONFIG_PGTABLE_LEVELS >= 5 */
211
212 struct pv_lazy_ops lazy_mode;
213
214 /* dom0 ops */
215
216 /* Sometimes the physical address is a pfn, and sometimes its
217 an mfn. We can tell which is which from the index. */
218 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
219 phys_addr_t phys, pgprot_t flags);
220#endif
221} __no_randomize_layout;
222
223struct arch_spinlock;
224#ifdef CONFIG_SMP
225#include <asm/spinlock_types.h>
226#endif
227
228struct qspinlock;
229
230struct pv_lock_ops {
231 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val);
232 struct paravirt_callee_save queued_spin_unlock;
233
234 void (*wait)(u8 *ptr, u8 val);
235 void (*kick)(int cpu);
236
237 struct paravirt_callee_save vcpu_is_preempted;
238} __no_randomize_layout;
239
240/* This contains all the paravirt structures: we get a convenient
241 * number for each function using the offset which we use to indicate
242 * what to patch. */
243struct paravirt_patch_template {
244 struct pv_cpu_ops cpu;
245 struct pv_irq_ops irq;
246 struct pv_mmu_ops mmu;
247 struct pv_lock_ops lock;
248} __no_randomize_layout;
249
250extern struct pv_info pv_info;
251extern struct paravirt_patch_template pv_ops;
252
253#define PARAVIRT_PATCH(x) \
254 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
255
256#define paravirt_type(op) \
257 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
258 [paravirt_opptr] "m" (pv_ops.op)
259/*
260 * Generate some code, and mark it as patchable by the
261 * apply_paravirt() alternate instruction patcher.
262 */
263#define _paravirt_alt(insn_string, type) \
264 "771:\n\t" insn_string "\n" "772:\n" \
265 ".pushsection .parainstructions,\"a\"\n" \
266 _ASM_ALIGN "\n" \
267 _ASM_PTR " 771b\n" \
268 " .byte " type "\n" \
269 " .byte 772b-771b\n" \
270 _ASM_ALIGN "\n" \
271 ".popsection\n"
272
273/* Generate patchable code, with the default asm parameters. */
274#define paravirt_alt(insn_string) \
275 _paravirt_alt(insn_string, "%c[paravirt_typenum]")
276
277/* Simple instruction patching code. */
278#define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t"
279
280unsigned int paravirt_patch(u8 type, void *insn_buff, unsigned long addr, unsigned int len);
281
282int paravirt_disable_iospace(void);
283
284/*
285 * This generates an indirect call based on the operation type number.
286 * The type number, computed in PARAVIRT_PATCH, is derived from the
287 * offset into the paravirt_patch_template structure, and can therefore be
288 * freely converted back into a structure offset.
289 */
290#define PARAVIRT_CALL \
291 ANNOTATE_RETPOLINE_SAFE \
292 "call *%[paravirt_opptr];"
293
294/*
295 * These macros are intended to wrap calls through one of the paravirt
296 * ops structs, so that they can be later identified and patched at
297 * runtime.
298 *
299 * Normally, a call to a pv_op function is a simple indirect call:
300 * (pv_op_struct.operations)(args...).
301 *
302 * Unfortunately, this is a relatively slow operation for modern CPUs,
303 * because it cannot necessarily determine what the destination
304 * address is. In this case, the address is a runtime constant, so at
305 * the very least we can patch the call to a simple direct call, or,
306 * ideally, patch an inline implementation into the callsite. (Direct
307 * calls are essentially free, because the call and return addresses
308 * are completely predictable.)
309 *
310 * For i386, these macros rely on the standard gcc "regparm(3)" calling
311 * convention, in which the first three arguments are placed in %eax,
312 * %edx, %ecx (in that order), and the remaining arguments are placed
313 * on the stack. All caller-save registers (eax,edx,ecx) are expected
314 * to be modified (either clobbered or used for return values).
315 * X86_64, on the other hand, already specifies a register-based calling
316 * conventions, returning at %rax, with parameters going in %rdi, %rsi,
317 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
318 * special handling for dealing with 4 arguments, unlike i386.
319 * However, x86_64 also has to clobber all caller saved registers, which
320 * unfortunately, are quite a bit (r8 - r11)
321 *
322 * The call instruction itself is marked by placing its start address
323 * and size into the .parainstructions section, so that
324 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
325 * appropriate patching under the control of the backend pv_init_ops
326 * implementation.
327 *
328 * Unfortunately there's no way to get gcc to generate the args setup
329 * for the call, and then allow the call itself to be generated by an
330 * inline asm. Because of this, we must do the complete arg setup and
331 * return value handling from within these macros. This is fairly
332 * cumbersome.
333 *
334 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
335 * It could be extended to more arguments, but there would be little
336 * to be gained from that. For each number of arguments, there are
337 * two VCALL and CALL variants for void and non-void functions.
338 *
339 * When there is a return value, the invoker of the macro must specify
340 * the return type. The macro then uses sizeof() on that type to
341 * determine whether it's a 32 or 64 bit value and places the return
342 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
343 * 64-bit). For x86_64 machines, it just returns in %rax regardless of
344 * the return value size.
345 *
346 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments;
347 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
348 * in low,high order
349 *
350 * Small structures are passed and returned in registers. The macro
351 * calling convention can't directly deal with this, so the wrapper
352 * functions must do it.
353 *
354 * These PVOP_* macros are only defined within this header. This
355 * means that all uses must be wrapped in inline functions. This also
356 * makes sure the incoming and outgoing types are always correct.
357 */
358#ifdef CONFIG_X86_32
359#define PVOP_CALL_ARGS \
360 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx;
361
362#define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
363#define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
364#define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
365
366#define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
367 "=c" (__ecx)
368#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
369
370#define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
371#define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
372
373#define EXTRA_CLOBBERS
374#define VEXTRA_CLOBBERS
375#else /* CONFIG_X86_64 */
376/* [re]ax isn't an arg, but the return val */
377#define PVOP_CALL_ARGS \
378 unsigned long __edi = __edi, __esi = __esi, \
379 __edx = __edx, __ecx = __ecx, __eax = __eax;
380
381#define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
382#define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
383#define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
384#define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
385
386#define PVOP_VCALL_CLOBBERS "=D" (__edi), \
387 "=S" (__esi), "=d" (__edx), \
388 "=c" (__ecx)
389#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
390
391/*
392 * void functions are still allowed [re]ax for scratch.
393 *
394 * The ZERO_CALL_USED REGS feature may end up zeroing out callee-saved
395 * registers. Make sure we model this with the appropriate clobbers.
396 */
397#ifdef CONFIG_ZERO_CALL_USED_REGS
398#define PVOP_VCALLEE_CLOBBERS "=a" (__eax), PVOP_VCALL_CLOBBERS
399#else
400#define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
401#endif
402#define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
403
404#define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
405#define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
406#endif /* CONFIG_X86_32 */
407
408#ifdef CONFIG_PARAVIRT_DEBUG
409#define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL)
410#else
411#define PVOP_TEST_NULL(op) ((void)pv_ops.op)
412#endif
413
414#define PVOP_RETVAL(rettype) \
415 ({ unsigned long __mask = ~0UL; \
416 BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \
417 switch (sizeof(rettype)) { \
418 case 1: __mask = 0xffUL; break; \
419 case 2: __mask = 0xffffUL; break; \
420 case 4: __mask = 0xffffffffUL; break; \
421 default: break; \
422 } \
423 __mask & __eax; \
424 })
425
426
427#define ____PVOP_CALL(ret, op, call_clbr, extra_clbr, ...) \
428 ({ \
429 PVOP_CALL_ARGS; \
430 PVOP_TEST_NULL(op); \
431 asm volatile(paravirt_alt(PARAVIRT_CALL) \
432 : call_clbr, ASM_CALL_CONSTRAINT \
433 : paravirt_type(op), \
434 ##__VA_ARGS__ \
435 : "memory", "cc" extra_clbr); \
436 ret; \
437 })
438
439#define ____PVOP_ALT_CALL(ret, op, alt, cond, call_clbr, \
440 extra_clbr, ...) \
441 ({ \
442 PVOP_CALL_ARGS; \
443 PVOP_TEST_NULL(op); \
444 asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \
445 alt, cond) \
446 : call_clbr, ASM_CALL_CONSTRAINT \
447 : paravirt_type(op), \
448 ##__VA_ARGS__ \
449 : "memory", "cc" extra_clbr); \
450 ret; \
451 })
452
453#define __PVOP_CALL(rettype, op, ...) \
454 ____PVOP_CALL(PVOP_RETVAL(rettype), op, \
455 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__)
456
457#define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \
458 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, \
459 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \
460 ##__VA_ARGS__)
461
462#define __PVOP_CALLEESAVE(rettype, op, ...) \
463 ____PVOP_CALL(PVOP_RETVAL(rettype), op.func, \
464 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__)
465
466#define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \
467 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \
468 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__)
469
470
471#define __PVOP_VCALL(op, ...) \
472 (void)____PVOP_CALL(, op, PVOP_VCALL_CLOBBERS, \
473 VEXTRA_CLOBBERS, ##__VA_ARGS__)
474
475#define __PVOP_ALT_VCALL(op, alt, cond, ...) \
476 (void)____PVOP_ALT_CALL(, op, alt, cond, \
477 PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \
478 ##__VA_ARGS__)
479
480#define __PVOP_VCALLEESAVE(op, ...) \
481 (void)____PVOP_CALL(, op.func, \
482 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
483
484#define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \
485 (void)____PVOP_ALT_CALL(, op.func, alt, cond, \
486 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
487
488
489#define PVOP_CALL0(rettype, op) \
490 __PVOP_CALL(rettype, op)
491#define PVOP_VCALL0(op) \
492 __PVOP_VCALL(op)
493#define PVOP_ALT_CALL0(rettype, op, alt, cond) \
494 __PVOP_ALT_CALL(rettype, op, alt, cond)
495#define PVOP_ALT_VCALL0(op, alt, cond) \
496 __PVOP_ALT_VCALL(op, alt, cond)
497
498#define PVOP_CALLEE0(rettype, op) \
499 __PVOP_CALLEESAVE(rettype, op)
500#define PVOP_VCALLEE0(op) \
501 __PVOP_VCALLEESAVE(op)
502#define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \
503 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond)
504#define PVOP_ALT_VCALLEE0(op, alt, cond) \
505 __PVOP_ALT_VCALLEESAVE(op, alt, cond)
506
507
508#define PVOP_CALL1(rettype, op, arg1) \
509 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1))
510#define PVOP_VCALL1(op, arg1) \
511 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1))
512#define PVOP_ALT_VCALL1(op, arg1, alt, cond) \
513 __PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1))
514
515#define PVOP_CALLEE1(rettype, op, arg1) \
516 __PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1))
517#define PVOP_VCALLEE1(op, arg1) \
518 __PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1))
519#define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \
520 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1))
521#define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \
522 __PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1))
523
524
525#define PVOP_CALL2(rettype, op, arg1, arg2) \
526 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2))
527#define PVOP_VCALL2(op, arg1, arg2) \
528 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2))
529
530#define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
531 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), \
532 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
533#define PVOP_VCALL3(op, arg1, arg2, arg3) \
534 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), \
535 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
536
537#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
538 __PVOP_CALL(rettype, op, \
539 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
540 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
541#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
542 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
543 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
544
545void _paravirt_nop(void);
546void paravirt_BUG(void);
547unsigned long paravirt_ret0(void);
548#ifdef CONFIG_PARAVIRT_XXL
549u64 _paravirt_ident_64(u64);
550unsigned long pv_native_save_fl(void);
551void pv_native_irq_disable(void);
552void pv_native_irq_enable(void);
553unsigned long pv_native_read_cr2(void);
554#endif
555
556#define paravirt_nop ((void *)_paravirt_nop)
557
558extern struct paravirt_patch_site __parainstructions[],
559 __parainstructions_end[];
560
561#endif /* __ASSEMBLY__ */
562#endif /* CONFIG_PARAVIRT */
563#endif /* _ASM_X86_PARAVIRT_TYPES_H */
564

source code of linux/arch/x86/include/asm/paravirt_types.h