1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_PARAVIRT_TYPES_H
3 #define _ASM_X86_PARAVIRT_TYPES_H
5 /* Bitmask of what can be clobbered: usually at least eax. */
6 #define CLBR_EAX (1 << 0)
7 #define CLBR_ECX (1 << 1)
8 #define CLBR_EDX (1 << 2)
9 #define CLBR_EDI (1 << 3)
12 /* CLBR_ANY should match all regs platform has. For i386, that's just it */
13 #define CLBR_ANY ((1 << 4) - 1)
15 #define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX)
16 #define CLBR_RET_REG (CLBR_EAX | CLBR_EDX)
18 #define CLBR_RAX CLBR_EAX
19 #define CLBR_RCX CLBR_ECX
20 #define CLBR_RDX CLBR_EDX
21 #define CLBR_RDI CLBR_EDI
22 #define CLBR_RSI (1 << 4)
23 #define CLBR_R8 (1 << 5)
24 #define CLBR_R9 (1 << 6)
25 #define CLBR_R10 (1 << 7)
26 #define CLBR_R11 (1 << 8)
28 #define CLBR_ANY ((1 << 9) - 1)
30 #define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \
31 CLBR_RCX | CLBR_R8 | CLBR_R9)
32 #define CLBR_RET_REG (CLBR_RAX)
38 #include <asm/desc_defs.h>
39 #include <asm/pgtable_types.h>
40 #include <asm/nospec-branch.h>
50 struct flush_tlb_info;
52 struct vm_area_struct;
55 * Wrapper type for pointers to code which uses the non-standard
56 * calling convention. See PV_CALL_SAVE_REGS_THUNK below.
58 struct paravirt_callee_save {
64 #ifdef CONFIG_PARAVIRT_XXL
65 u16 extra_user_64bit_cs; /* __USER_CS if none */
73 * Patch may replace one of the defined code sequences with
74 * arbitrary code, subject to the same register constraints.
75 * This generally means the code is not free to clobber any
76 * registers other than EAX. The patch function should return
77 * the number of bytes of code generated, as we nop pad the
78 * rest in generic code.
80 unsigned (*patch)(u8 type, void *insn_buff,
81 unsigned long addr, unsigned len);
82 } __no_randomize_layout;
84 #ifdef CONFIG_PARAVIRT_XXL
86 /* Set deferred update mode, used for batching operations. */
90 } __no_randomize_layout;
94 /* hooks for various privileged instructions */
95 void (*io_delay)(void);
97 #ifdef CONFIG_PARAVIRT_XXL
98 unsigned long (*get_debugreg)(int regno);
99 void (*set_debugreg)(int regno, unsigned long value);
101 unsigned long (*read_cr0)(void);
102 void (*write_cr0)(unsigned long);
104 void (*write_cr4)(unsigned long);
106 /* Segment descriptor handling */
107 void (*load_tr_desc)(void);
108 void (*load_gdt)(const struct desc_ptr *);
109 void (*load_idt)(const struct desc_ptr *);
110 void (*set_ldt)(const void *desc, unsigned entries);
111 unsigned long (*store_tr)(void);
112 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
113 void (*load_gs_index)(unsigned int idx);
114 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
116 void (*write_gdt_entry)(struct desc_struct *,
117 int entrynum, const void *desc, int size);
118 void (*write_idt_entry)(gate_desc *,
119 int entrynum, const gate_desc *gate);
120 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
121 void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
123 void (*load_sp0)(unsigned long sp0);
125 #ifdef CONFIG_X86_IOPL_IOPERM
126 void (*invalidate_io_bitmap)(void);
127 void (*update_io_bitmap)(void);
130 void (*wbinvd)(void);
132 /* cpuid emulation, mostly so that caps bits can be disabled */
133 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
134 unsigned int *ecx, unsigned int *edx);
136 /* Unsafe MSR operations. These will warn or panic on failure. */
137 u64 (*read_msr)(unsigned int msr);
138 void (*write_msr)(unsigned int msr, unsigned low, unsigned high);
141 * Safe MSR operations.
142 * read sets err to 0 or -EIO. write returns 0 or -EIO.
144 u64 (*read_msr_safe)(unsigned int msr, int *err);
145 int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high);
147 u64 (*read_pmc)(int counter);
149 void (*start_context_switch)(struct task_struct *prev);
150 void (*end_context_switch)(struct task_struct *next);
152 } __no_randomize_layout;
155 #ifdef CONFIG_PARAVIRT_XXL
157 * Get/set interrupt state. save_fl is expected to use X86_EFLAGS_IF;
158 * all other bits returned from save_fl are undefined.
160 * NOTE: These functions callers expect the callee to preserve
161 * more registers than the standard C calling convention.
163 struct paravirt_callee_save save_fl;
164 struct paravirt_callee_save irq_disable;
165 struct paravirt_callee_save irq_enable;
167 void (*safe_halt)(void);
170 } __no_randomize_layout;
174 void (*flush_tlb_user)(void);
175 void (*flush_tlb_kernel)(void);
176 void (*flush_tlb_one_user)(unsigned long addr);
177 void (*flush_tlb_others)(const struct cpumask *cpus,
178 const struct flush_tlb_info *info);
180 void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
182 /* Hook for intercepting the destruction of an mm_struct. */
183 void (*exit_mmap)(struct mm_struct *mm);
185 #ifdef CONFIG_PARAVIRT_XXL
186 struct paravirt_callee_save read_cr2;
187 void (*write_cr2)(unsigned long);
189 unsigned long (*read_cr3)(void);
190 void (*write_cr3)(unsigned long);
192 /* Hooks for intercepting the creation/use of an mm_struct. */
193 void (*activate_mm)(struct mm_struct *prev,
194 struct mm_struct *next);
195 void (*dup_mmap)(struct mm_struct *oldmm,
196 struct mm_struct *mm);
198 /* Hooks for allocating and freeing a pagetable top-level */
199 int (*pgd_alloc)(struct mm_struct *mm);
200 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);
203 * Hooks for allocating/releasing pagetable pages when they're
204 * attached to a pagetable
206 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn);
207 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn);
208 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn);
209 void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn);
210 void (*release_pte)(unsigned long pfn);
211 void (*release_pmd)(unsigned long pfn);
212 void (*release_pud)(unsigned long pfn);
213 void (*release_p4d)(unsigned long pfn);
215 /* Pagetable manipulation functions */
216 void (*set_pte)(pte_t *ptep, pte_t pteval);
217 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
219 pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr,
221 void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr,
222 pte_t *ptep, pte_t pte);
224 struct paravirt_callee_save pte_val;
225 struct paravirt_callee_save make_pte;
227 struct paravirt_callee_save pgd_val;
228 struct paravirt_callee_save make_pgd;
230 void (*set_pud)(pud_t *pudp, pud_t pudval);
232 struct paravirt_callee_save pmd_val;
233 struct paravirt_callee_save make_pmd;
235 struct paravirt_callee_save pud_val;
236 struct paravirt_callee_save make_pud;
238 void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval);
240 #if CONFIG_PGTABLE_LEVELS >= 5
241 struct paravirt_callee_save p4d_val;
242 struct paravirt_callee_save make_p4d;
244 void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval);
245 #endif /* CONFIG_PGTABLE_LEVELS >= 5 */
247 struct pv_lazy_ops lazy_mode;
251 /* Sometimes the physical address is a pfn, and sometimes its
252 an mfn. We can tell which is which from the index. */
253 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
254 phys_addr_t phys, pgprot_t flags);
256 } __no_randomize_layout;
258 struct arch_spinlock;
260 #include <asm/spinlock_types.h>
266 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val);
267 struct paravirt_callee_save queued_spin_unlock;
269 void (*wait)(u8 *ptr, u8 val);
270 void (*kick)(int cpu);
272 struct paravirt_callee_save vcpu_is_preempted;
273 } __no_randomize_layout;
275 /* This contains all the paravirt structures: we get a convenient
276 * number for each function using the offset which we use to indicate
278 struct paravirt_patch_template {
279 struct pv_init_ops init;
280 struct pv_cpu_ops cpu;
281 struct pv_irq_ops irq;
282 struct pv_mmu_ops mmu;
283 struct pv_lock_ops lock;
284 } __no_randomize_layout;
286 extern struct pv_info pv_info;
287 extern struct paravirt_patch_template pv_ops;
288 extern void (*paravirt_iret)(void);
290 #define PARAVIRT_PATCH(x) \
291 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
293 #define paravirt_type(op) \
294 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
295 [paravirt_opptr] "i" (&(pv_ops.op))
296 #define paravirt_clobber(clobber) \
297 [paravirt_clobber] "i" (clobber)
300 * Generate some code, and mark it as patchable by the
301 * apply_paravirt() alternate instruction patcher.
303 #define _paravirt_alt(insn_string, type, clobber) \
304 "771:\n\t" insn_string "\n" "772:\n" \
305 ".pushsection .parainstructions,\"a\"\n" \
308 " .byte " type "\n" \
309 " .byte 772b-771b\n" \
310 " .short " clobber "\n" \
313 /* Generate patchable code, with the default asm parameters. */
314 #define paravirt_alt(insn_string) \
315 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
317 /* Simple instruction patching code. */
318 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t"
320 unsigned paravirt_patch_default(u8 type, void *insn_buff, unsigned long addr, unsigned len);
321 unsigned paravirt_patch_insns(void *insn_buff, unsigned len, const char *start, const char *end);
323 unsigned native_patch(u8 type, void *insn_buff, unsigned long addr, unsigned len);
325 int paravirt_disable_iospace(void);
328 * This generates an indirect call based on the operation type number.
329 * The type number, computed in PARAVIRT_PATCH, is derived from the
330 * offset into the paravirt_patch_template structure, and can therefore be
331 * freely converted back into a structure offset.
333 #define PARAVIRT_CALL \
334 ANNOTATE_RETPOLINE_SAFE \
335 "call *%c[paravirt_opptr];"
338 * These macros are intended to wrap calls through one of the paravirt
339 * ops structs, so that they can be later identified and patched at
342 * Normally, a call to a pv_op function is a simple indirect call:
343 * (pv_op_struct.operations)(args...).
345 * Unfortunately, this is a relatively slow operation for modern CPUs,
346 * because it cannot necessarily determine what the destination
347 * address is. In this case, the address is a runtime constant, so at
348 * the very least we can patch the call to e a simple direct call, or
349 * ideally, patch an inline implementation into the callsite. (Direct
350 * calls are essentially free, because the call and return addresses
351 * are completely predictable.)
353 * For i386, these macros rely on the standard gcc "regparm(3)" calling
354 * convention, in which the first three arguments are placed in %eax,
355 * %edx, %ecx (in that order), and the remaining arguments are placed
356 * on the stack. All caller-save registers (eax,edx,ecx) are expected
357 * to be modified (either clobbered or used for return values).
358 * X86_64, on the other hand, already specifies a register-based calling
359 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
360 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
361 * special handling for dealing with 4 arguments, unlike i386.
362 * However, x86_64 also have to clobber all caller saved registers, which
363 * unfortunately, are quite a bit (r8 - r11)
365 * The call instruction itself is marked by placing its start address
366 * and size into the .parainstructions section, so that
367 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
368 * appropriate patching under the control of the backend pv_init_ops
371 * Unfortunately there's no way to get gcc to generate the args setup
372 * for the call, and then allow the call itself to be generated by an
373 * inline asm. Because of this, we must do the complete arg setup and
374 * return value handling from within these macros. This is fairly
377 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
378 * It could be extended to more arguments, but there would be little
379 * to be gained from that. For each number of arguments, there are
380 * the two VCALL and CALL variants for void and non-void functions.
382 * When there is a return value, the invoker of the macro must specify
383 * the return type. The macro then uses sizeof() on that type to
384 * determine whether its a 32 or 64 bit value, and places the return
385 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
386 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
387 * the return value size.
389 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
390 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
393 * Small structures are passed and returned in registers. The macro
394 * calling convention can't directly deal with this, so the wrapper
395 * functions must do this.
397 * These PVOP_* macros are only defined within this header. This
398 * means that all uses must be wrapped in inline functions. This also
399 * makes sure the incoming and outgoing types are always correct.
402 #define PVOP_CALL_ARGS \
403 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx;
405 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
406 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
407 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
409 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
411 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
413 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
414 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
416 #define EXTRA_CLOBBERS
417 #define VEXTRA_CLOBBERS
418 #else /* CONFIG_X86_64 */
419 /* [re]ax isn't an arg, but the return val */
420 #define PVOP_CALL_ARGS \
421 unsigned long __edi = __edi, __esi = __esi, \
422 __edx = __edx, __ecx = __ecx, __eax = __eax;
424 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
425 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
426 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
427 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
429 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \
430 "=S" (__esi), "=d" (__edx), \
432 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
434 /* void functions are still allowed [re]ax for scratch */
435 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
436 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
438 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
439 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
440 #endif /* CONFIG_X86_32 */
442 #ifdef CONFIG_PARAVIRT_DEBUG
443 #define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL)
445 #define PVOP_TEST_NULL(op) ((void)pv_ops.op)
448 #define PVOP_RETVAL(rettype) \
449 ({ unsigned long __mask = ~0UL; \
450 BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \
451 switch (sizeof(rettype)) { \
452 case 1: __mask = 0xffUL; break; \
453 case 2: __mask = 0xffffUL; break; \
454 case 4: __mask = 0xffffffffUL; break; \
461 #define ____PVOP_CALL(ret, op, clbr, call_clbr, extra_clbr, ...) \
464 PVOP_TEST_NULL(op); \
465 asm volatile(paravirt_alt(PARAVIRT_CALL) \
466 : call_clbr, ASM_CALL_CONSTRAINT \
467 : paravirt_type(op), \
468 paravirt_clobber(clbr), \
470 : "memory", "cc" extra_clbr); \
474 #define ____PVOP_ALT_CALL(ret, op, alt, cond, clbr, call_clbr, \
478 PVOP_TEST_NULL(op); \
479 asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \
481 : call_clbr, ASM_CALL_CONSTRAINT \
482 : paravirt_type(op), \
483 paravirt_clobber(clbr), \
485 : "memory", "cc" extra_clbr); \
489 #define __PVOP_CALL(rettype, op, ...) \
490 ____PVOP_CALL(PVOP_RETVAL(rettype), op, CLBR_ANY, \
491 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__)
493 #define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \
494 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, CLBR_ANY,\
495 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \
498 #define __PVOP_CALLEESAVE(rettype, op, ...) \
499 ____PVOP_CALL(PVOP_RETVAL(rettype), op.func, CLBR_RET_REG, \
500 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__)
502 #define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \
503 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \
504 CLBR_RET_REG, PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__)
507 #define __PVOP_VCALL(op, ...) \
508 (void)____PVOP_CALL(, op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
509 VEXTRA_CLOBBERS, ##__VA_ARGS__)
511 #define __PVOP_ALT_VCALL(op, alt, cond, ...) \
512 (void)____PVOP_ALT_CALL(, op, alt, cond, CLBR_ANY, \
513 PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \
516 #define __PVOP_VCALLEESAVE(op, ...) \
517 (void)____PVOP_CALL(, op.func, CLBR_RET_REG, \
518 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
520 #define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \
521 (void)____PVOP_ALT_CALL(, op.func, alt, cond, CLBR_RET_REG, \
522 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
525 #define PVOP_CALL0(rettype, op) \
526 __PVOP_CALL(rettype, op)
527 #define PVOP_VCALL0(op) \
529 #define PVOP_ALT_CALL0(rettype, op, alt, cond) \
530 __PVOP_ALT_CALL(rettype, op, alt, cond)
531 #define PVOP_ALT_VCALL0(op, alt, cond) \
532 __PVOP_ALT_VCALL(op, alt, cond)
534 #define PVOP_CALLEE0(rettype, op) \
535 __PVOP_CALLEESAVE(rettype, op)
536 #define PVOP_VCALLEE0(op) \
537 __PVOP_VCALLEESAVE(op)
538 #define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \
539 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond)
540 #define PVOP_ALT_VCALLEE0(op, alt, cond) \
541 __PVOP_ALT_VCALLEESAVE(op, alt, cond)
544 #define PVOP_CALL1(rettype, op, arg1) \
545 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1))
546 #define PVOP_VCALL1(op, arg1) \
547 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1))
548 #define PVOP_ALT_VCALL1(op, arg1, alt, cond) \
549 __PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1))
551 #define PVOP_CALLEE1(rettype, op, arg1) \
552 __PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1))
553 #define PVOP_VCALLEE1(op, arg1) \
554 __PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1))
555 #define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \
556 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1))
557 #define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \
558 __PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1))
561 #define PVOP_CALL2(rettype, op, arg1, arg2) \
562 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2))
563 #define PVOP_VCALL2(op, arg1, arg2) \
564 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2))
566 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
567 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), \
568 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
569 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
570 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), \
571 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
573 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
574 __PVOP_CALL(rettype, op, \
575 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
576 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
577 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
578 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
579 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
581 /* Lazy mode for batching updates / context switch */
582 enum paravirt_lazy_mode {
588 enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
589 void paravirt_start_context_switch(struct task_struct *prev);
590 void paravirt_end_context_switch(struct task_struct *next);
592 void paravirt_enter_lazy_mmu(void);
593 void paravirt_leave_lazy_mmu(void);
594 void paravirt_flush_lazy_mmu(void);
596 void _paravirt_nop(void);
597 u64 _paravirt_ident_64(u64);
599 #define paravirt_nop ((void *)_paravirt_nop)
601 /* These all sit in the .parainstructions section to tell us what to patch. */
602 struct paravirt_patch_site {
603 u8 *instr; /* original instructions */
604 u8 type; /* type of this instruction */
605 u8 len; /* length of original instruction */
608 extern struct paravirt_patch_site __parainstructions[],
609 __parainstructions_end[];
611 #endif /* __ASSEMBLY__ */
613 #endif /* _ASM_X86_PARAVIRT_TYPES_H */