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>
44 #include <asm/pgtable_types.h>
56 * Wrapper type for pointers to code which uses the non-standard
57 * calling convention. See PV_CALL_SAVE_REGS_THUNK below.
59 struct paravirt_callee_save {
65 unsigned int kernel_rpl;
66 int shared_kernel_pmd;
69 u16 extra_user_64bit_cs; /* __USER_CS if none */
73 unsigned int features; /* valid only if paravirt_enabled is set */
77 #define paravirt_has(x) paravirt_has_feature(PV_SUPPORTED_##x)
78 /* Supported features */
79 #define PV_SUPPORTED_RTC (1<<0)
83 * Patch may replace one of the defined code sequences with
84 * arbitrary code, subject to the same register constraints.
85 * This generally means the code is not free to clobber any
86 * registers other than EAX. The patch function should return
87 * the number of bytes of code generated, as we nop pad the
88 * rest in generic code.
90 unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
91 unsigned long addr, unsigned len);
96 /* Set deferred update mode, used for batching operations. */
103 unsigned long long (*sched_clock)(void);
104 unsigned long long (*steal_clock)(int cpu);
108 /* hooks for various privileged instructions */
109 unsigned long (*get_debugreg)(int regno);
110 void (*set_debugreg)(int regno, unsigned long value);
114 unsigned long (*read_cr0)(void);
115 void (*write_cr0)(unsigned long);
117 unsigned long (*read_cr4_safe)(void);
118 unsigned long (*read_cr4)(void);
119 void (*write_cr4)(unsigned long);
122 unsigned long (*read_cr8)(void);
123 void (*write_cr8)(unsigned long);
126 /* Segment descriptor handling */
127 void (*load_tr_desc)(void);
128 void (*load_gdt)(const struct desc_ptr *);
129 void (*load_idt)(const struct desc_ptr *);
130 /* store_gdt has been removed. */
131 void (*store_idt)(struct desc_ptr *);
132 void (*set_ldt)(const void *desc, unsigned entries);
133 unsigned long (*store_tr)(void);
134 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
136 void (*load_gs_index)(unsigned int idx);
138 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
140 void (*write_gdt_entry)(struct desc_struct *,
141 int entrynum, const void *desc, int size);
142 void (*write_idt_entry)(gate_desc *,
143 int entrynum, const gate_desc *gate);
144 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
145 void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
147 void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
149 void (*set_iopl_mask)(unsigned mask);
151 void (*wbinvd)(void);
152 void (*io_delay)(void);
154 /* cpuid emulation, mostly so that caps bits can be disabled */
155 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
156 unsigned int *ecx, unsigned int *edx);
158 /* MSR, PMC and TSR operations.
159 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
160 u64 (*read_msr)(unsigned int msr, int *err);
161 int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
163 u64 (*read_pmc)(int counter);
166 * Switch to usermode gs and return to 64-bit usermode using
167 * sysret. Only used in 64-bit kernels to return to 64-bit
168 * processes. Usermode register state, including %rsp, must
169 * already be restored.
171 void (*usergs_sysret64)(void);
174 * Switch to usermode gs and return to 32-bit usermode using
175 * sysret. Used to return to 32-on-64 compat processes.
176 * Other usermode register state, including %esp, must already
179 void (*usergs_sysret32)(void);
181 /* Normal iret. Jump to this with the standard iret stack
185 void (*swapgs)(void);
187 void (*start_context_switch)(struct task_struct *prev);
188 void (*end_context_switch)(struct task_struct *next);
193 * Get/set interrupt state. save_fl and restore_fl are only
194 * expected to use X86_EFLAGS_IF; all other bits
195 * returned from save_fl are undefined, and may be ignored by
198 * NOTE: These functions callers expect the callee to preserve
199 * more registers than the standard C calling convention.
201 struct paravirt_callee_save save_fl;
202 struct paravirt_callee_save restore_fl;
203 struct paravirt_callee_save irq_disable;
204 struct paravirt_callee_save irq_enable;
206 void (*safe_halt)(void);
210 void (*adjust_exception_frame)(void);
215 #ifdef CONFIG_X86_LOCAL_APIC
216 void (*startup_ipi_hook)(int phys_apicid,
217 unsigned long start_eip,
218 unsigned long start_esp);
223 unsigned long (*read_cr2)(void);
224 void (*write_cr2)(unsigned long);
226 unsigned long (*read_cr3)(void);
227 void (*write_cr3)(unsigned long);
230 * Hooks for intercepting the creation/use/destruction of an
233 void (*activate_mm)(struct mm_struct *prev,
234 struct mm_struct *next);
235 void (*dup_mmap)(struct mm_struct *oldmm,
236 struct mm_struct *mm);
237 void (*exit_mmap)(struct mm_struct *mm);
241 void (*flush_tlb_user)(void);
242 void (*flush_tlb_kernel)(void);
243 void (*flush_tlb_single)(unsigned long addr);
244 void (*flush_tlb_others)(const struct cpumask *cpus,
245 struct mm_struct *mm,
249 /* Hooks for allocating and freeing a pagetable top-level */
250 int (*pgd_alloc)(struct mm_struct *mm);
251 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);
254 * Hooks for allocating/releasing pagetable pages when they're
255 * attached to a pagetable
257 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn);
258 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn);
259 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn);
260 void (*release_pte)(unsigned long pfn);
261 void (*release_pmd)(unsigned long pfn);
262 void (*release_pud)(unsigned long pfn);
264 /* Pagetable manipulation functions */
265 void (*set_pte)(pte_t *ptep, pte_t pteval);
266 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
267 pte_t *ptep, pte_t pteval);
268 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
269 void (*set_pmd_at)(struct mm_struct *mm, unsigned long addr,
270 pmd_t *pmdp, pmd_t pmdval);
271 void (*pte_update)(struct mm_struct *mm, unsigned long addr,
273 void (*pte_update_defer)(struct mm_struct *mm,
274 unsigned long addr, pte_t *ptep);
275 void (*pmd_update)(struct mm_struct *mm, unsigned long addr,
277 void (*pmd_update_defer)(struct mm_struct *mm,
278 unsigned long addr, pmd_t *pmdp);
280 pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr,
282 void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr,
283 pte_t *ptep, pte_t pte);
285 struct paravirt_callee_save pte_val;
286 struct paravirt_callee_save make_pte;
288 struct paravirt_callee_save pgd_val;
289 struct paravirt_callee_save make_pgd;
291 #if CONFIG_PGTABLE_LEVELS >= 3
292 #ifdef CONFIG_X86_PAE
293 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
294 void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
296 void (*pmd_clear)(pmd_t *pmdp);
298 #endif /* CONFIG_X86_PAE */
300 void (*set_pud)(pud_t *pudp, pud_t pudval);
302 struct paravirt_callee_save pmd_val;
303 struct paravirt_callee_save make_pmd;
305 #if CONFIG_PGTABLE_LEVELS == 4
306 struct paravirt_callee_save pud_val;
307 struct paravirt_callee_save make_pud;
309 void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
310 #endif /* CONFIG_PGTABLE_LEVELS == 4 */
311 #endif /* CONFIG_PGTABLE_LEVELS >= 3 */
313 struct pv_lazy_ops lazy_mode;
317 /* Sometimes the physical address is a pfn, and sometimes its
318 an mfn. We can tell which is which from the index. */
319 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
320 phys_addr_t phys, pgprot_t flags);
323 struct arch_spinlock;
325 #include <asm/spinlock_types.h>
327 typedef u16 __ticket_t;
333 #ifdef CONFIG_QUEUED_SPINLOCKS
334 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val);
335 struct paravirt_callee_save queued_spin_unlock;
337 void (*wait)(u8 *ptr, u8 val);
338 void (*kick)(int cpu);
339 #else /* !CONFIG_QUEUED_SPINLOCKS */
340 struct paravirt_callee_save lock_spinning;
341 void (*unlock_kick)(struct arch_spinlock *lock, __ticket_t ticket);
342 #endif /* !CONFIG_QUEUED_SPINLOCKS */
345 /* This contains all the paravirt structures: we get a convenient
346 * number for each function using the offset which we use to indicate
348 struct paravirt_patch_template {
349 struct pv_init_ops pv_init_ops;
350 struct pv_time_ops pv_time_ops;
351 struct pv_cpu_ops pv_cpu_ops;
352 struct pv_irq_ops pv_irq_ops;
353 struct pv_apic_ops pv_apic_ops;
354 struct pv_mmu_ops pv_mmu_ops;
355 struct pv_lock_ops pv_lock_ops;
358 extern struct pv_info pv_info;
359 extern struct pv_init_ops pv_init_ops;
360 extern struct pv_time_ops pv_time_ops;
361 extern struct pv_cpu_ops pv_cpu_ops;
362 extern struct pv_irq_ops pv_irq_ops;
363 extern struct pv_apic_ops pv_apic_ops;
364 extern struct pv_mmu_ops pv_mmu_ops;
365 extern struct pv_lock_ops pv_lock_ops;
367 #define PARAVIRT_PATCH(x) \
368 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
370 #define paravirt_type(op) \
371 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
372 [paravirt_opptr] "i" (&(op))
373 #define paravirt_clobber(clobber) \
374 [paravirt_clobber] "i" (clobber)
377 * Generate some code, and mark it as patchable by the
378 * apply_paravirt() alternate instruction patcher.
380 #define _paravirt_alt(insn_string, type, clobber) \
381 "771:\n\t" insn_string "\n" "772:\n" \
382 ".pushsection .parainstructions,\"a\"\n" \
385 " .byte " type "\n" \
386 " .byte 772b-771b\n" \
387 " .short " clobber "\n" \
390 /* Generate patchable code, with the default asm parameters. */
391 #define paravirt_alt(insn_string) \
392 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
394 /* Simple instruction patching code. */
395 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t"
397 #define DEF_NATIVE(ops, name, code) \
398 __visible extern const char start_##ops##_##name[], end_##ops##_##name[]; \
399 asm(NATIVE_LABEL("start_", ops, name) code NATIVE_LABEL("end_", ops, name))
401 unsigned paravirt_patch_nop(void);
402 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
403 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
404 unsigned paravirt_patch_ignore(unsigned len);
405 unsigned paravirt_patch_call(void *insnbuf,
406 const void *target, u16 tgt_clobbers,
407 unsigned long addr, u16 site_clobbers,
409 unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
410 unsigned long addr, unsigned len);
411 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
412 unsigned long addr, unsigned len);
414 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
415 const char *start, const char *end);
417 unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
418 unsigned long addr, unsigned len);
420 int paravirt_disable_iospace(void);
423 * This generates an indirect call based on the operation type number.
424 * The type number, computed in PARAVIRT_PATCH, is derived from the
425 * offset into the paravirt_patch_template structure, and can therefore be
426 * freely converted back into a structure offset.
428 #define PARAVIRT_CALL "call *%c[paravirt_opptr];"
431 * These macros are intended to wrap calls through one of the paravirt
432 * ops structs, so that they can be later identified and patched at
435 * Normally, a call to a pv_op function is a simple indirect call:
436 * (pv_op_struct.operations)(args...).
438 * Unfortunately, this is a relatively slow operation for modern CPUs,
439 * because it cannot necessarily determine what the destination
440 * address is. In this case, the address is a runtime constant, so at
441 * the very least we can patch the call to e a simple direct call, or
442 * ideally, patch an inline implementation into the callsite. (Direct
443 * calls are essentially free, because the call and return addresses
444 * are completely predictable.)
446 * For i386, these macros rely on the standard gcc "regparm(3)" calling
447 * convention, in which the first three arguments are placed in %eax,
448 * %edx, %ecx (in that order), and the remaining arguments are placed
449 * on the stack. All caller-save registers (eax,edx,ecx) are expected
450 * to be modified (either clobbered or used for return values).
451 * X86_64, on the other hand, already specifies a register-based calling
452 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
453 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
454 * special handling for dealing with 4 arguments, unlike i386.
455 * However, x86_64 also have to clobber all caller saved registers, which
456 * unfortunately, are quite a bit (r8 - r11)
458 * The call instruction itself is marked by placing its start address
459 * and size into the .parainstructions section, so that
460 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
461 * appropriate patching under the control of the backend pv_init_ops
464 * Unfortunately there's no way to get gcc to generate the args setup
465 * for the call, and then allow the call itself to be generated by an
466 * inline asm. Because of this, we must do the complete arg setup and
467 * return value handling from within these macros. This is fairly
470 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
471 * It could be extended to more arguments, but there would be little
472 * to be gained from that. For each number of arguments, there are
473 * the two VCALL and CALL variants for void and non-void functions.
475 * When there is a return value, the invoker of the macro must specify
476 * the return type. The macro then uses sizeof() on that type to
477 * determine whether its a 32 or 64 bit value, and places the return
478 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
479 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
480 * the return value size.
482 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
483 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
486 * Small structures are passed and returned in registers. The macro
487 * calling convention can't directly deal with this, so the wrapper
488 * functions must do this.
490 * These PVOP_* macros are only defined within this header. This
491 * means that all uses must be wrapped in inline functions. This also
492 * makes sure the incoming and outgoing types are always correct.
495 #define PVOP_VCALL_ARGS \
496 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
497 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
499 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
500 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
501 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
503 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
505 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
507 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
508 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
510 #define EXTRA_CLOBBERS
511 #define VEXTRA_CLOBBERS
512 #else /* CONFIG_X86_64 */
513 /* [re]ax isn't an arg, but the return val */
514 #define PVOP_VCALL_ARGS \
515 unsigned long __edi = __edi, __esi = __esi, \
516 __edx = __edx, __ecx = __ecx, __eax = __eax
517 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
519 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
520 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
521 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
522 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
524 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \
525 "=S" (__esi), "=d" (__edx), \
527 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
529 /* void functions are still allowed [re]ax for scratch */
530 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
531 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
533 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
534 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
535 #endif /* CONFIG_X86_32 */
537 #ifdef CONFIG_PARAVIRT_DEBUG
538 #define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
540 #define PVOP_TEST_NULL(op) ((void)op)
543 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
548 PVOP_TEST_NULL(op); \
549 /* This is 32-bit specific, but is okay in 64-bit */ \
550 /* since this condition will never hold */ \
551 if (sizeof(rettype) > sizeof(unsigned long)) { \
553 paravirt_alt(PARAVIRT_CALL) \
556 : paravirt_type(op), \
557 paravirt_clobber(clbr), \
559 : "memory", "cc" extra_clbr); \
560 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
563 paravirt_alt(PARAVIRT_CALL) \
566 : paravirt_type(op), \
567 paravirt_clobber(clbr), \
569 : "memory", "cc" extra_clbr); \
570 __ret = (rettype)__eax; \
575 #define __PVOP_CALL(rettype, op, pre, post, ...) \
576 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
577 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
579 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
580 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
581 PVOP_CALLEE_CLOBBERS, , \
582 pre, post, ##__VA_ARGS__)
585 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
588 PVOP_TEST_NULL(op); \
590 paravirt_alt(PARAVIRT_CALL) \
593 : paravirt_type(op), \
594 paravirt_clobber(clbr), \
596 : "memory", "cc" extra_clbr); \
599 #define __PVOP_VCALL(op, pre, post, ...) \
600 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
602 pre, post, ##__VA_ARGS__)
604 #define __PVOP_VCALLEESAVE(op, pre, post, ...) \
605 ____PVOP_VCALL(op.func, CLBR_RET_REG, \
606 PVOP_VCALLEE_CLOBBERS, , \
607 pre, post, ##__VA_ARGS__)
611 #define PVOP_CALL0(rettype, op) \
612 __PVOP_CALL(rettype, op, "", "")
613 #define PVOP_VCALL0(op) \
614 __PVOP_VCALL(op, "", "")
616 #define PVOP_CALLEE0(rettype, op) \
617 __PVOP_CALLEESAVE(rettype, op, "", "")
618 #define PVOP_VCALLEE0(op) \
619 __PVOP_VCALLEESAVE(op, "", "")
622 #define PVOP_CALL1(rettype, op, arg1) \
623 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
624 #define PVOP_VCALL1(op, arg1) \
625 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
627 #define PVOP_CALLEE1(rettype, op, arg1) \
628 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
629 #define PVOP_VCALLEE1(op, arg1) \
630 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
633 #define PVOP_CALL2(rettype, op, arg1, arg2) \
634 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
635 PVOP_CALL_ARG2(arg2))
636 #define PVOP_VCALL2(op, arg1, arg2) \
637 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
638 PVOP_CALL_ARG2(arg2))
640 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \
641 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
642 PVOP_CALL_ARG2(arg2))
643 #define PVOP_VCALLEE2(op, arg1, arg2) \
644 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
645 PVOP_CALL_ARG2(arg2))
648 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
649 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
650 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
651 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
652 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
653 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
655 /* This is the only difference in x86_64. We can make it much simpler */
657 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
658 __PVOP_CALL(rettype, op, \
659 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
660 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
661 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
662 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
664 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
665 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
666 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
668 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
669 __PVOP_CALL(rettype, op, "", "", \
670 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
671 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
672 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
673 __PVOP_VCALL(op, "", "", \
674 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
675 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
678 /* Lazy mode for batching updates / context switch */
679 enum paravirt_lazy_mode {
685 enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
686 void paravirt_start_context_switch(struct task_struct *prev);
687 void paravirt_end_context_switch(struct task_struct *next);
689 void paravirt_enter_lazy_mmu(void);
690 void paravirt_leave_lazy_mmu(void);
691 void paravirt_flush_lazy_mmu(void);
693 void _paravirt_nop(void);
694 u32 _paravirt_ident_32(u32);
695 u64 _paravirt_ident_64(u64);
697 #define paravirt_nop ((void *)_paravirt_nop)
699 /* These all sit in the .parainstructions section to tell us what to patch. */
700 struct paravirt_patch_site {
701 u8 *instr; /* original instructions */
702 u8 instrtype; /* type of this instruction */
703 u8 len; /* length of original instruction */
704 u16 clobbers; /* what registers you may clobber */
707 extern struct paravirt_patch_site __parainstructions[],
708 __parainstructions_end[];
710 #endif /* __ASSEMBLY__ */
712 #endif /* _ASM_X86_PARAVIRT_TYPES_H */