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);
173 /* Normal iret. Jump to this with the standard iret stack
177 void (*swapgs
)(void);
179 void (*start_context_switch
)(struct task_struct
*prev
);
180 void (*end_context_switch
)(struct task_struct
*next
);
185 * Get/set interrupt state. save_fl and restore_fl are only
186 * expected to use X86_EFLAGS_IF; all other bits
187 * returned from save_fl are undefined, and may be ignored by
190 * NOTE: These functions callers expect the callee to preserve
191 * more registers than the standard C calling convention.
193 struct paravirt_callee_save save_fl
;
194 struct paravirt_callee_save restore_fl
;
195 struct paravirt_callee_save irq_disable
;
196 struct paravirt_callee_save irq_enable
;
198 void (*safe_halt
)(void);
202 void (*adjust_exception_frame
)(void);
207 unsigned long (*read_cr2
)(void);
208 void (*write_cr2
)(unsigned long);
210 unsigned long (*read_cr3
)(void);
211 void (*write_cr3
)(unsigned long);
214 * Hooks for intercepting the creation/use/destruction of an
217 void (*activate_mm
)(struct mm_struct
*prev
,
218 struct mm_struct
*next
);
219 void (*dup_mmap
)(struct mm_struct
*oldmm
,
220 struct mm_struct
*mm
);
221 void (*exit_mmap
)(struct mm_struct
*mm
);
225 void (*flush_tlb_user
)(void);
226 void (*flush_tlb_kernel
)(void);
227 void (*flush_tlb_single
)(unsigned long addr
);
228 void (*flush_tlb_others
)(const struct cpumask
*cpus
,
229 struct mm_struct
*mm
,
233 /* Hooks for allocating and freeing a pagetable top-level */
234 int (*pgd_alloc
)(struct mm_struct
*mm
);
235 void (*pgd_free
)(struct mm_struct
*mm
, pgd_t
*pgd
);
238 * Hooks for allocating/releasing pagetable pages when they're
239 * attached to a pagetable
241 void (*alloc_pte
)(struct mm_struct
*mm
, unsigned long pfn
);
242 void (*alloc_pmd
)(struct mm_struct
*mm
, unsigned long pfn
);
243 void (*alloc_pud
)(struct mm_struct
*mm
, unsigned long pfn
);
244 void (*release_pte
)(unsigned long pfn
);
245 void (*release_pmd
)(unsigned long pfn
);
246 void (*release_pud
)(unsigned long pfn
);
248 /* Pagetable manipulation functions */
249 void (*set_pte
)(pte_t
*ptep
, pte_t pteval
);
250 void (*set_pte_at
)(struct mm_struct
*mm
, unsigned long addr
,
251 pte_t
*ptep
, pte_t pteval
);
252 void (*set_pmd
)(pmd_t
*pmdp
, pmd_t pmdval
);
253 void (*set_pmd_at
)(struct mm_struct
*mm
, unsigned long addr
,
254 pmd_t
*pmdp
, pmd_t pmdval
);
255 void (*pte_update
)(struct mm_struct
*mm
, unsigned long addr
,
258 pte_t (*ptep_modify_prot_start
)(struct mm_struct
*mm
, unsigned long addr
,
260 void (*ptep_modify_prot_commit
)(struct mm_struct
*mm
, unsigned long addr
,
261 pte_t
*ptep
, pte_t pte
);
263 struct paravirt_callee_save pte_val
;
264 struct paravirt_callee_save make_pte
;
266 struct paravirt_callee_save pgd_val
;
267 struct paravirt_callee_save make_pgd
;
269 #if CONFIG_PGTABLE_LEVELS >= 3
270 #ifdef CONFIG_X86_PAE
271 void (*set_pte_atomic
)(pte_t
*ptep
, pte_t pteval
);
272 void (*pte_clear
)(struct mm_struct
*mm
, unsigned long addr
,
274 void (*pmd_clear
)(pmd_t
*pmdp
);
276 #endif /* CONFIG_X86_PAE */
278 void (*set_pud
)(pud_t
*pudp
, pud_t pudval
);
280 struct paravirt_callee_save pmd_val
;
281 struct paravirt_callee_save make_pmd
;
283 #if CONFIG_PGTABLE_LEVELS == 4
284 struct paravirt_callee_save pud_val
;
285 struct paravirt_callee_save make_pud
;
287 void (*set_pgd
)(pgd_t
*pudp
, pgd_t pgdval
);
288 #endif /* CONFIG_PGTABLE_LEVELS == 4 */
289 #endif /* CONFIG_PGTABLE_LEVELS >= 3 */
291 struct pv_lazy_ops lazy_mode
;
295 /* Sometimes the physical address is a pfn, and sometimes its
296 an mfn. We can tell which is which from the index. */
297 void (*set_fixmap
)(unsigned /* enum fixed_addresses */ idx
,
298 phys_addr_t phys
, pgprot_t flags
);
301 struct arch_spinlock
;
303 #include <asm/spinlock_types.h>
305 typedef u16 __ticket_t
;
311 #ifdef CONFIG_QUEUED_SPINLOCKS
312 void (*queued_spin_lock_slowpath
)(struct qspinlock
*lock
, u32 val
);
313 struct paravirt_callee_save queued_spin_unlock
;
315 void (*wait
)(u8
*ptr
, u8 val
);
316 void (*kick
)(int cpu
);
317 #else /* !CONFIG_QUEUED_SPINLOCKS */
318 struct paravirt_callee_save lock_spinning
;
319 void (*unlock_kick
)(struct arch_spinlock
*lock
, __ticket_t ticket
);
320 #endif /* !CONFIG_QUEUED_SPINLOCKS */
323 /* This contains all the paravirt structures: we get a convenient
324 * number for each function using the offset which we use to indicate
326 struct paravirt_patch_template
{
327 struct pv_init_ops pv_init_ops
;
328 struct pv_time_ops pv_time_ops
;
329 struct pv_cpu_ops pv_cpu_ops
;
330 struct pv_irq_ops pv_irq_ops
;
331 struct pv_mmu_ops pv_mmu_ops
;
332 struct pv_lock_ops pv_lock_ops
;
335 extern struct pv_info pv_info
;
336 extern struct pv_init_ops pv_init_ops
;
337 extern struct pv_time_ops pv_time_ops
;
338 extern struct pv_cpu_ops pv_cpu_ops
;
339 extern struct pv_irq_ops pv_irq_ops
;
340 extern struct pv_mmu_ops pv_mmu_ops
;
341 extern struct pv_lock_ops pv_lock_ops
;
343 #define PARAVIRT_PATCH(x) \
344 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
346 #define paravirt_type(op) \
347 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
348 [paravirt_opptr] "i" (&(op))
349 #define paravirt_clobber(clobber) \
350 [paravirt_clobber] "i" (clobber)
353 * Generate some code, and mark it as patchable by the
354 * apply_paravirt() alternate instruction patcher.
356 #define _paravirt_alt(insn_string, type, clobber) \
357 "771:\n\t" insn_string "\n" "772:\n" \
358 ".pushsection .parainstructions,\"a\"\n" \
361 " .byte " type "\n" \
362 " .byte 772b-771b\n" \
363 " .short " clobber "\n" \
366 /* Generate patchable code, with the default asm parameters. */
367 #define paravirt_alt(insn_string) \
368 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
370 /* Simple instruction patching code. */
371 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t"
373 #define DEF_NATIVE(ops, name, code) \
374 __visible extern const char start_##ops##_##name[], end_##ops##_##name[]; \
375 asm(NATIVE_LABEL("start_", ops, name) code NATIVE_LABEL("end_", ops, name))
377 unsigned paravirt_patch_ident_32(void *insnbuf
, unsigned len
);
378 unsigned paravirt_patch_ident_64(void *insnbuf
, unsigned len
);
379 unsigned paravirt_patch_call(void *insnbuf
,
380 const void *target
, u16 tgt_clobbers
,
381 unsigned long addr
, u16 site_clobbers
,
383 unsigned paravirt_patch_jmp(void *insnbuf
, const void *target
,
384 unsigned long addr
, unsigned len
);
385 unsigned paravirt_patch_default(u8 type
, u16 clobbers
, void *insnbuf
,
386 unsigned long addr
, unsigned len
);
388 unsigned paravirt_patch_insns(void *insnbuf
, unsigned len
,
389 const char *start
, const char *end
);
391 unsigned native_patch(u8 type
, u16 clobbers
, void *ibuf
,
392 unsigned long addr
, unsigned len
);
394 int paravirt_disable_iospace(void);
397 * This generates an indirect call based on the operation type number.
398 * The type number, computed in PARAVIRT_PATCH, is derived from the
399 * offset into the paravirt_patch_template structure, and can therefore be
400 * freely converted back into a structure offset.
402 #define PARAVIRT_CALL "call *%c[paravirt_opptr];"
405 * These macros are intended to wrap calls through one of the paravirt
406 * ops structs, so that they can be later identified and patched at
409 * Normally, a call to a pv_op function is a simple indirect call:
410 * (pv_op_struct.operations)(args...).
412 * Unfortunately, this is a relatively slow operation for modern CPUs,
413 * because it cannot necessarily determine what the destination
414 * address is. In this case, the address is a runtime constant, so at
415 * the very least we can patch the call to e a simple direct call, or
416 * ideally, patch an inline implementation into the callsite. (Direct
417 * calls are essentially free, because the call and return addresses
418 * are completely predictable.)
420 * For i386, these macros rely on the standard gcc "regparm(3)" calling
421 * convention, in which the first three arguments are placed in %eax,
422 * %edx, %ecx (in that order), and the remaining arguments are placed
423 * on the stack. All caller-save registers (eax,edx,ecx) are expected
424 * to be modified (either clobbered or used for return values).
425 * X86_64, on the other hand, already specifies a register-based calling
426 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
427 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
428 * special handling for dealing with 4 arguments, unlike i386.
429 * However, x86_64 also have to clobber all caller saved registers, which
430 * unfortunately, are quite a bit (r8 - r11)
432 * The call instruction itself is marked by placing its start address
433 * and size into the .parainstructions section, so that
434 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
435 * appropriate patching under the control of the backend pv_init_ops
438 * Unfortunately there's no way to get gcc to generate the args setup
439 * for the call, and then allow the call itself to be generated by an
440 * inline asm. Because of this, we must do the complete arg setup and
441 * return value handling from within these macros. This is fairly
444 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
445 * It could be extended to more arguments, but there would be little
446 * to be gained from that. For each number of arguments, there are
447 * the two VCALL and CALL variants for void and non-void functions.
449 * When there is a return value, the invoker of the macro must specify
450 * the return type. The macro then uses sizeof() on that type to
451 * determine whether its a 32 or 64 bit value, and places the return
452 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
453 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
454 * the return value size.
456 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
457 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
460 * Small structures are passed and returned in registers. The macro
461 * calling convention can't directly deal with this, so the wrapper
462 * functions must do this.
464 * These PVOP_* macros are only defined within this header. This
465 * means that all uses must be wrapped in inline functions. This also
466 * makes sure the incoming and outgoing types are always correct.
469 #define PVOP_VCALL_ARGS \
470 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
471 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
473 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
474 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
475 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
477 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
479 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
481 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
482 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
484 #define EXTRA_CLOBBERS
485 #define VEXTRA_CLOBBERS
486 #else /* CONFIG_X86_64 */
487 /* [re]ax isn't an arg, but the return val */
488 #define PVOP_VCALL_ARGS \
489 unsigned long __edi = __edi, __esi = __esi, \
490 __edx = __edx, __ecx = __ecx, __eax = __eax
491 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
493 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
494 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
495 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
496 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
498 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \
499 "=S" (__esi), "=d" (__edx), \
501 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
503 /* void functions are still allowed [re]ax for scratch */
504 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
505 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
507 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
508 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
509 #endif /* CONFIG_X86_32 */
511 #ifdef CONFIG_PARAVIRT_DEBUG
512 #define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
514 #define PVOP_TEST_NULL(op) ((void)op)
517 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
522 PVOP_TEST_NULL(op); \
523 /* This is 32-bit specific, but is okay in 64-bit */ \
524 /* since this condition will never hold */ \
525 if (sizeof(rettype) > sizeof(unsigned long)) { \
527 paravirt_alt(PARAVIRT_CALL) \
530 : paravirt_type(op), \
531 paravirt_clobber(clbr), \
533 : "memory", "cc" extra_clbr); \
534 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
537 paravirt_alt(PARAVIRT_CALL) \
540 : paravirt_type(op), \
541 paravirt_clobber(clbr), \
543 : "memory", "cc" extra_clbr); \
544 __ret = (rettype)__eax; \
549 #define __PVOP_CALL(rettype, op, pre, post, ...) \
550 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
551 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
553 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
554 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
555 PVOP_CALLEE_CLOBBERS, , \
556 pre, post, ##__VA_ARGS__)
559 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
562 PVOP_TEST_NULL(op); \
564 paravirt_alt(PARAVIRT_CALL) \
567 : paravirt_type(op), \
568 paravirt_clobber(clbr), \
570 : "memory", "cc" extra_clbr); \
573 #define __PVOP_VCALL(op, pre, post, ...) \
574 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
576 pre, post, ##__VA_ARGS__)
578 #define __PVOP_VCALLEESAVE(op, pre, post, ...) \
579 ____PVOP_VCALL(op.func, CLBR_RET_REG, \
580 PVOP_VCALLEE_CLOBBERS, , \
581 pre, post, ##__VA_ARGS__)
585 #define PVOP_CALL0(rettype, op) \
586 __PVOP_CALL(rettype, op, "", "")
587 #define PVOP_VCALL0(op) \
588 __PVOP_VCALL(op, "", "")
590 #define PVOP_CALLEE0(rettype, op) \
591 __PVOP_CALLEESAVE(rettype, op, "", "")
592 #define PVOP_VCALLEE0(op) \
593 __PVOP_VCALLEESAVE(op, "", "")
596 #define PVOP_CALL1(rettype, op, arg1) \
597 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
598 #define PVOP_VCALL1(op, arg1) \
599 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
601 #define PVOP_CALLEE1(rettype, op, arg1) \
602 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
603 #define PVOP_VCALLEE1(op, arg1) \
604 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
607 #define PVOP_CALL2(rettype, op, arg1, arg2) \
608 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
609 PVOP_CALL_ARG2(arg2))
610 #define PVOP_VCALL2(op, arg1, arg2) \
611 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
612 PVOP_CALL_ARG2(arg2))
614 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \
615 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
616 PVOP_CALL_ARG2(arg2))
617 #define PVOP_VCALLEE2(op, arg1, arg2) \
618 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
619 PVOP_CALL_ARG2(arg2))
622 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
623 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
624 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
625 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
626 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
627 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
629 /* This is the only difference in x86_64. We can make it much simpler */
631 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
632 __PVOP_CALL(rettype, op, \
633 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
634 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
635 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
636 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
638 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
639 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
640 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
642 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
643 __PVOP_CALL(rettype, op, "", "", \
644 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
645 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
646 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
647 __PVOP_VCALL(op, "", "", \
648 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
649 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
652 /* Lazy mode for batching updates / context switch */
653 enum paravirt_lazy_mode
{
659 enum paravirt_lazy_mode
paravirt_get_lazy_mode(void);
660 void paravirt_start_context_switch(struct task_struct
*prev
);
661 void paravirt_end_context_switch(struct task_struct
*next
);
663 void paravirt_enter_lazy_mmu(void);
664 void paravirt_leave_lazy_mmu(void);
665 void paravirt_flush_lazy_mmu(void);
667 void _paravirt_nop(void);
668 u32
_paravirt_ident_32(u32
);
669 u64
_paravirt_ident_64(u64
);
671 #define paravirt_nop ((void *)_paravirt_nop)
673 /* These all sit in the .parainstructions section to tell us what to patch. */
674 struct paravirt_patch_site
{
675 u8
*instr
; /* original instructions */
676 u8 instrtype
; /* type of this instruction */
677 u8 len
; /* length of original instruction */
678 u16 clobbers
; /* what registers you may clobber */
681 extern struct paravirt_patch_site __parainstructions
[],
682 __parainstructions_end
[];
684 #endif /* __ASSEMBLY__ */
686 #endif /* _ASM_X86_PARAVIRT_TYPES_H */