1 #ifndef _ASM_X86_PARAVIRT_TYPES_H
2 #define _ASM_X86_PARAVIRT_TYPES_H
4 /* 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)
17 #define CLBR_SCRATCH (0)
19 #define CLBR_RAX CLBR_EAX
20 #define CLBR_RCX CLBR_ECX
21 #define CLBR_RDX CLBR_EDX
22 #define CLBR_RDI CLBR_EDI
23 #define CLBR_RSI (1 << 4)
24 #define CLBR_R8 (1 << 5)
25 #define CLBR_R9 (1 << 6)
26 #define CLBR_R10 (1 << 7)
27 #define CLBR_R11 (1 << 8)
29 #define CLBR_ANY ((1 << 9) - 1)
31 #define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \
32 CLBR_RCX | CLBR_R8 | CLBR_R9)
33 #define CLBR_RET_REG (CLBR_RAX)
34 #define CLBR_SCRATCH (CLBR_R10 | CLBR_R11)
38 #define CLBR_CALLEE_SAVE ((CLBR_ARG_REGS | CLBR_SCRATCH) & ~CLBR_RET_REG)
42 #include <asm/desc_defs.h>
43 #include <asm/kmap_types.h>
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 unsigned int kernel_rpl;
65 int shared_kernel_pmd;
72 * Patch may replace one of the defined code sequences with
73 * arbitrary code, subject to the same register constraints.
74 * This generally means the code is not free to clobber any
75 * registers other than EAX. The patch function should return
76 * the number of bytes of code generated, as we nop pad the
77 * rest in generic code.
79 unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
80 unsigned long addr, unsigned len);
82 /* Basic arch-specific setup */
83 void (*arch_setup)(void);
84 char *(*memory_setup)(void);
85 void (*post_allocator_init)(void);
87 /* Print a banner to identify the environment */
93 /* Set deferred update mode, used for batching operations. */
99 void (*time_init)(void);
101 /* Set and set time of day */
102 unsigned long (*get_wallclock)(void);
103 int (*set_wallclock)(unsigned long);
105 unsigned long long (*sched_clock)(void);
106 unsigned long (*get_tsc_khz)(void);
110 /* hooks for various privileged instructions */
111 unsigned long (*get_debugreg)(int regno);
112 void (*set_debugreg)(int regno, unsigned long value);
116 unsigned long (*read_cr0)(void);
117 void (*write_cr0)(unsigned long);
119 unsigned long (*read_cr4_safe)(void);
120 unsigned long (*read_cr4)(void);
121 void (*write_cr4)(unsigned long);
124 unsigned long (*read_cr8)(void);
125 void (*write_cr8)(unsigned long);
128 /* Segment descriptor handling */
129 void (*load_tr_desc)(void);
130 void (*load_gdt)(const struct desc_ptr *);
131 void (*load_idt)(const struct desc_ptr *);
132 void (*store_gdt)(struct desc_ptr *);
133 void (*store_idt)(struct desc_ptr *);
134 void (*set_ldt)(const void *desc, unsigned entries);
135 unsigned long (*store_tr)(void);
136 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
138 void (*load_gs_index)(unsigned int idx);
140 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
142 void (*write_gdt_entry)(struct desc_struct *,
143 int entrynum, const void *desc, int size);
144 void (*write_idt_entry)(gate_desc *,
145 int entrynum, const gate_desc *gate);
146 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
147 void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
149 void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
151 void (*set_iopl_mask)(unsigned mask);
153 void (*wbinvd)(void);
154 void (*io_delay)(void);
156 /* cpuid emulation, mostly so that caps bits can be disabled */
157 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
158 unsigned int *ecx, unsigned int *edx);
160 /* MSR, PMC and TSR operations.
161 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
162 u64 (*read_msr)(unsigned int msr, int *err);
163 int (*rdmsr_regs)(u32 *regs);
164 int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
165 int (*wrmsr_regs)(u32 *regs);
167 u64 (*read_tsc)(void);
168 u64 (*read_pmc)(int counter);
169 unsigned long long (*read_tscp)(unsigned int *aux);
172 * Atomically enable interrupts and return to userspace. This
173 * is only ever used to return to 32-bit processes; in a
174 * 64-bit kernel, it's used for 32-on-64 compat processes, but
175 * never native 64-bit processes. (Jump, not call.)
177 void (*irq_enable_sysexit)(void);
180 * Switch to usermode gs and return to 64-bit usermode using
181 * sysret. Only used in 64-bit kernels to return to 64-bit
182 * processes. Usermode register state, including %rsp, must
183 * already be restored.
185 void (*usergs_sysret64)(void);
188 * Switch to usermode gs and return to 32-bit usermode using
189 * sysret. Used to return to 32-on-64 compat processes.
190 * Other usermode register state, including %esp, must already
193 void (*usergs_sysret32)(void);
195 /* Normal iret. Jump to this with the standard iret stack
199 void (*swapgs)(void);
201 void (*start_context_switch)(struct task_struct *prev);
202 void (*end_context_switch)(struct task_struct *next);
206 void (*init_IRQ)(void);
209 * Get/set interrupt state. save_fl and restore_fl are only
210 * expected to use X86_EFLAGS_IF; all other bits
211 * returned from save_fl are undefined, and may be ignored by
214 * NOTE: These functions callers expect the callee to preserve
215 * more registers than the standard C calling convention.
217 struct paravirt_callee_save save_fl;
218 struct paravirt_callee_save restore_fl;
219 struct paravirt_callee_save irq_disable;
220 struct paravirt_callee_save irq_enable;
222 void (*safe_halt)(void);
226 void (*adjust_exception_frame)(void);
231 #ifdef CONFIG_X86_LOCAL_APIC
232 void (*setup_boot_clock)(void);
233 void (*setup_secondary_clock)(void);
235 void (*startup_ipi_hook)(int phys_apicid,
236 unsigned long start_eip,
237 unsigned long start_esp);
243 * Called before/after init_mm pagetable setup. setup_start
244 * may reset %cr3, and may pre-install parts of the pagetable;
245 * pagetable setup is expected to preserve any existing
248 void (*pagetable_setup_start)(pgd_t *pgd_base);
249 void (*pagetable_setup_done)(pgd_t *pgd_base);
251 unsigned long (*read_cr2)(void);
252 void (*write_cr2)(unsigned long);
254 unsigned long (*read_cr3)(void);
255 void (*write_cr3)(unsigned long);
258 * Hooks for intercepting the creation/use/destruction of an
261 void (*activate_mm)(struct mm_struct *prev,
262 struct mm_struct *next);
263 void (*dup_mmap)(struct mm_struct *oldmm,
264 struct mm_struct *mm);
265 void (*exit_mmap)(struct mm_struct *mm);
269 void (*flush_tlb_user)(void);
270 void (*flush_tlb_kernel)(void);
271 void (*flush_tlb_single)(unsigned long addr);
272 void (*flush_tlb_others)(const struct cpumask *cpus,
273 struct mm_struct *mm,
276 /* Hooks for allocating and freeing a pagetable top-level */
277 int (*pgd_alloc)(struct mm_struct *mm);
278 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);
281 * Hooks for allocating/releasing pagetable pages when they're
282 * attached to a pagetable
284 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn);
285 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn);
286 void (*alloc_pmd_clone)(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count);
287 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn);
288 void (*release_pte)(unsigned long pfn);
289 void (*release_pmd)(unsigned long pfn);
290 void (*release_pud)(unsigned long pfn);
292 /* Pagetable manipulation functions */
293 void (*set_pte)(pte_t *ptep, pte_t pteval);
294 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
295 pte_t *ptep, pte_t pteval);
296 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
297 void (*pte_update)(struct mm_struct *mm, unsigned long addr,
299 void (*pte_update_defer)(struct mm_struct *mm,
300 unsigned long addr, pte_t *ptep);
302 pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr,
304 void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr,
305 pte_t *ptep, pte_t pte);
307 struct paravirt_callee_save pte_val;
308 struct paravirt_callee_save make_pte;
310 struct paravirt_callee_save pgd_val;
311 struct paravirt_callee_save make_pgd;
313 #if PAGETABLE_LEVELS >= 3
314 #ifdef CONFIG_X86_PAE
315 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
316 void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
318 void (*pmd_clear)(pmd_t *pmdp);
320 #endif /* CONFIG_X86_PAE */
322 void (*set_pud)(pud_t *pudp, pud_t pudval);
324 struct paravirt_callee_save pmd_val;
325 struct paravirt_callee_save make_pmd;
327 #if PAGETABLE_LEVELS == 4
328 struct paravirt_callee_save pud_val;
329 struct paravirt_callee_save make_pud;
331 void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
332 #endif /* PAGETABLE_LEVELS == 4 */
333 #endif /* PAGETABLE_LEVELS >= 3 */
335 #ifdef CONFIG_HIGHPTE
336 void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
339 struct pv_lazy_ops lazy_mode;
343 /* Sometimes the physical address is a pfn, and sometimes its
344 an mfn. We can tell which is which from the index. */
345 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
346 phys_addr_t phys, pgprot_t flags);
351 int (*spin_is_locked)(struct raw_spinlock *lock);
352 int (*spin_is_contended)(struct raw_spinlock *lock);
353 void (*spin_lock)(struct raw_spinlock *lock);
354 void (*spin_lock_flags)(struct raw_spinlock *lock, unsigned long flags);
355 int (*spin_trylock)(struct raw_spinlock *lock);
356 void (*spin_unlock)(struct raw_spinlock *lock);
359 /* This contains all the paravirt structures: we get a convenient
360 * number for each function using the offset which we use to indicate
362 struct paravirt_patch_template {
363 struct pv_init_ops pv_init_ops;
364 struct pv_time_ops pv_time_ops;
365 struct pv_cpu_ops pv_cpu_ops;
366 struct pv_irq_ops pv_irq_ops;
367 struct pv_apic_ops pv_apic_ops;
368 struct pv_mmu_ops pv_mmu_ops;
369 struct pv_lock_ops pv_lock_ops;
372 extern struct pv_info pv_info;
373 extern struct pv_init_ops pv_init_ops;
374 extern struct pv_time_ops pv_time_ops;
375 extern struct pv_cpu_ops pv_cpu_ops;
376 extern struct pv_irq_ops pv_irq_ops;
377 extern struct pv_apic_ops pv_apic_ops;
378 extern struct pv_mmu_ops pv_mmu_ops;
379 extern struct pv_lock_ops pv_lock_ops;
381 #define PARAVIRT_PATCH(x) \
382 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
384 #define paravirt_type(op) \
385 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
386 [paravirt_opptr] "i" (&(op))
387 #define paravirt_clobber(clobber) \
388 [paravirt_clobber] "i" (clobber)
391 * Generate some code, and mark it as patchable by the
392 * apply_paravirt() alternate instruction patcher.
394 #define _paravirt_alt(insn_string, type, clobber) \
395 "771:\n\t" insn_string "\n" "772:\n" \
396 ".pushsection .parainstructions,\"a\"\n" \
399 " .byte " type "\n" \
400 " .byte 772b-771b\n" \
401 " .short " clobber "\n" \
404 /* Generate patchable code, with the default asm parameters. */
405 #define paravirt_alt(insn_string) \
406 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
408 /* Simple instruction patching code. */
409 #define DEF_NATIVE(ops, name, code) \
410 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
411 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
413 unsigned paravirt_patch_nop(void);
414 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
415 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
416 unsigned paravirt_patch_ignore(unsigned len);
417 unsigned paravirt_patch_call(void *insnbuf,
418 const void *target, u16 tgt_clobbers,
419 unsigned long addr, u16 site_clobbers,
421 unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
422 unsigned long addr, unsigned len);
423 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
424 unsigned long addr, unsigned len);
426 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
427 const char *start, const char *end);
429 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
430 unsigned long addr, unsigned len);
432 int paravirt_disable_iospace(void);
435 * This generates an indirect call based on the operation type number.
436 * The type number, computed in PARAVIRT_PATCH, is derived from the
437 * offset into the paravirt_patch_template structure, and can therefore be
438 * freely converted back into a structure offset.
440 #define PARAVIRT_CALL "call *%c[paravirt_opptr];"
443 * These macros are intended to wrap calls through one of the paravirt
444 * ops structs, so that they can be later identified and patched at
447 * Normally, a call to a pv_op function is a simple indirect call:
448 * (pv_op_struct.operations)(args...).
450 * Unfortunately, this is a relatively slow operation for modern CPUs,
451 * because it cannot necessarily determine what the destination
452 * address is. In this case, the address is a runtime constant, so at
453 * the very least we can patch the call to e a simple direct call, or
454 * ideally, patch an inline implementation into the callsite. (Direct
455 * calls are essentially free, because the call and return addresses
456 * are completely predictable.)
458 * For i386, these macros rely on the standard gcc "regparm(3)" calling
459 * convention, in which the first three arguments are placed in %eax,
460 * %edx, %ecx (in that order), and the remaining arguments are placed
461 * on the stack. All caller-save registers (eax,edx,ecx) are expected
462 * to be modified (either clobbered or used for return values).
463 * X86_64, on the other hand, already specifies a register-based calling
464 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
465 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
466 * special handling for dealing with 4 arguments, unlike i386.
467 * However, x86_64 also have to clobber all caller saved registers, which
468 * unfortunately, are quite a bit (r8 - r11)
470 * The call instruction itself is marked by placing its start address
471 * and size into the .parainstructions section, so that
472 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
473 * appropriate patching under the control of the backend pv_init_ops
476 * Unfortunately there's no way to get gcc to generate the args setup
477 * for the call, and then allow the call itself to be generated by an
478 * inline asm. Because of this, we must do the complete arg setup and
479 * return value handling from within these macros. This is fairly
482 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
483 * It could be extended to more arguments, but there would be little
484 * to be gained from that. For each number of arguments, there are
485 * the two VCALL and CALL variants for void and non-void functions.
487 * When there is a return value, the invoker of the macro must specify
488 * the return type. The macro then uses sizeof() on that type to
489 * determine whether its a 32 or 64 bit value, and places the return
490 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
491 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
492 * the return value size.
494 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
495 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
498 * Small structures are passed and returned in registers. The macro
499 * calling convention can't directly deal with this, so the wrapper
500 * functions must do this.
502 * These PVOP_* macros are only defined within this header. This
503 * means that all uses must be wrapped in inline functions. This also
504 * makes sure the incoming and outgoing types are always correct.
507 #define PVOP_VCALL_ARGS \
508 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
509 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
511 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
512 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
513 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
515 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
517 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
519 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
520 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
522 #define EXTRA_CLOBBERS
523 #define VEXTRA_CLOBBERS
524 #else /* CONFIG_X86_64 */
525 #define PVOP_VCALL_ARGS \
526 unsigned long __edi = __edi, __esi = __esi, \
527 __edx = __edx, __ecx = __ecx
528 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax
530 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
531 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
532 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
533 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
535 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \
536 "=S" (__esi), "=d" (__edx), \
538 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
540 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
541 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
543 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
544 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
545 #endif /* CONFIG_X86_32 */
547 #ifdef CONFIG_PARAVIRT_DEBUG
548 #define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
550 #define PVOP_TEST_NULL(op) ((void)op)
553 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
558 PVOP_TEST_NULL(op); \
559 /* This is 32-bit specific, but is okay in 64-bit */ \
560 /* since this condition will never hold */ \
561 if (sizeof(rettype) > sizeof(unsigned long)) { \
563 paravirt_alt(PARAVIRT_CALL) \
566 : paravirt_type(op), \
567 paravirt_clobber(clbr), \
569 : "memory", "cc" extra_clbr); \
570 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
573 paravirt_alt(PARAVIRT_CALL) \
576 : paravirt_type(op), \
577 paravirt_clobber(clbr), \
579 : "memory", "cc" extra_clbr); \
580 __ret = (rettype)__eax; \
585 #define __PVOP_CALL(rettype, op, pre, post, ...) \
586 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
587 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
589 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
590 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
591 PVOP_CALLEE_CLOBBERS, , \
592 pre, post, ##__VA_ARGS__)
595 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
598 PVOP_TEST_NULL(op); \
600 paravirt_alt(PARAVIRT_CALL) \
603 : paravirt_type(op), \
604 paravirt_clobber(clbr), \
606 : "memory", "cc" extra_clbr); \
609 #define __PVOP_VCALL(op, pre, post, ...) \
610 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
612 pre, post, ##__VA_ARGS__)
614 #define __PVOP_VCALLEESAVE(rettype, op, pre, post, ...) \
615 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
616 PVOP_VCALLEE_CLOBBERS, , \
617 pre, post, ##__VA_ARGS__)
621 #define PVOP_CALL0(rettype, op) \
622 __PVOP_CALL(rettype, op, "", "")
623 #define PVOP_VCALL0(op) \
624 __PVOP_VCALL(op, "", "")
626 #define PVOP_CALLEE0(rettype, op) \
627 __PVOP_CALLEESAVE(rettype, op, "", "")
628 #define PVOP_VCALLEE0(op) \
629 __PVOP_VCALLEESAVE(op, "", "")
632 #define PVOP_CALL1(rettype, op, arg1) \
633 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
634 #define PVOP_VCALL1(op, arg1) \
635 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
637 #define PVOP_CALLEE1(rettype, op, arg1) \
638 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
639 #define PVOP_VCALLEE1(op, arg1) \
640 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
643 #define PVOP_CALL2(rettype, op, arg1, arg2) \
644 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
645 PVOP_CALL_ARG2(arg2))
646 #define PVOP_VCALL2(op, arg1, arg2) \
647 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
648 PVOP_CALL_ARG2(arg2))
650 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \
651 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
652 PVOP_CALL_ARG2(arg2))
653 #define PVOP_VCALLEE2(op, arg1, arg2) \
654 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
655 PVOP_CALL_ARG2(arg2))
658 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
659 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
660 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
661 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
662 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
663 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
665 /* This is the only difference in x86_64. We can make it much simpler */
667 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
668 __PVOP_CALL(rettype, op, \
669 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
670 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
671 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
672 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
674 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
675 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
676 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
678 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
679 __PVOP_CALL(rettype, op, "", "", \
680 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
681 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
682 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
683 __PVOP_VCALL(op, "", "", \
684 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
685 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
688 /* Lazy mode for batching updates / context switch */
689 enum paravirt_lazy_mode {
695 enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
696 void paravirt_start_context_switch(struct task_struct *prev);
697 void paravirt_end_context_switch(struct task_struct *next);
699 void paravirt_enter_lazy_mmu(void);
700 void paravirt_leave_lazy_mmu(void);
702 void _paravirt_nop(void);
703 u32 _paravirt_ident_32(u32);
704 u64 _paravirt_ident_64(u64);
706 #define paravirt_nop ((void *)_paravirt_nop)
708 /* These all sit in the .parainstructions section to tell us what to patch. */
709 struct paravirt_patch_site {
710 u8 *instr; /* original instructions */
711 u8 instrtype; /* type of this instruction */
712 u8 len; /* length of original instruction */
713 u16 clobbers; /* what registers you may clobber */
716 extern struct paravirt_patch_site __parainstructions[],
717 __parainstructions_end[];
719 #endif /* __ASSEMBLY__ */
721 #endif /* _ASM_X86_PARAVIRT_TYPES_H */