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
);
85 /* Set deferred update mode, used for batching operations. */
91 void (*time_init
)(void);
93 /* Set and set time of day */
94 unsigned long (*get_wallclock
)(void);
95 int (*set_wallclock
)(unsigned long);
97 unsigned long long (*sched_clock
)(void);
98 unsigned long (*get_tsc_khz
)(void);
102 /* hooks for various privileged instructions */
103 unsigned long (*get_debugreg
)(int regno
);
104 void (*set_debugreg
)(int regno
, unsigned long value
);
108 unsigned long (*read_cr0
)(void);
109 void (*write_cr0
)(unsigned long);
111 unsigned long (*read_cr4_safe
)(void);
112 unsigned long (*read_cr4
)(void);
113 void (*write_cr4
)(unsigned long);
116 unsigned long (*read_cr8
)(void);
117 void (*write_cr8
)(unsigned long);
120 /* Segment descriptor handling */
121 void (*load_tr_desc
)(void);
122 void (*load_gdt
)(const struct desc_ptr
*);
123 void (*load_idt
)(const struct desc_ptr
*);
124 void (*store_gdt
)(struct desc_ptr
*);
125 void (*store_idt
)(struct desc_ptr
*);
126 void (*set_ldt
)(const void *desc
, unsigned entries
);
127 unsigned long (*store_tr
)(void);
128 void (*load_tls
)(struct thread_struct
*t
, unsigned int cpu
);
130 void (*load_gs_index
)(unsigned int idx
);
132 void (*write_ldt_entry
)(struct desc_struct
*ldt
, int entrynum
,
134 void (*write_gdt_entry
)(struct desc_struct
*,
135 int entrynum
, const void *desc
, int size
);
136 void (*write_idt_entry
)(gate_desc
*,
137 int entrynum
, const gate_desc
*gate
);
138 void (*alloc_ldt
)(struct desc_struct
*ldt
, unsigned entries
);
139 void (*free_ldt
)(struct desc_struct
*ldt
, unsigned entries
);
141 void (*load_sp0
)(struct tss_struct
*tss
, struct thread_struct
*t
);
143 void (*set_iopl_mask
)(unsigned mask
);
145 void (*wbinvd
)(void);
146 void (*io_delay
)(void);
148 /* cpuid emulation, mostly so that caps bits can be disabled */
149 void (*cpuid
)(unsigned int *eax
, unsigned int *ebx
,
150 unsigned int *ecx
, unsigned int *edx
);
152 /* MSR, PMC and TSR operations.
153 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
154 u64 (*read_msr_amd
)(unsigned int msr
, int *err
);
155 u64 (*read_msr
)(unsigned int msr
, int *err
);
156 int (*write_msr
)(unsigned int msr
, unsigned low
, unsigned high
);
158 u64 (*read_tsc
)(void);
159 u64 (*read_pmc
)(int counter
);
160 unsigned long long (*read_tscp
)(unsigned int *aux
);
163 * Atomically enable interrupts and return to userspace. This
164 * is only ever used to return to 32-bit processes; in a
165 * 64-bit kernel, it's used for 32-on-64 compat processes, but
166 * never native 64-bit processes. (Jump, not call.)
168 void (*irq_enable_sysexit
)(void);
171 * Switch to usermode gs and return to 64-bit usermode using
172 * sysret. Only used in 64-bit kernels to return to 64-bit
173 * processes. Usermode register state, including %rsp, must
174 * already be restored.
176 void (*usergs_sysret64
)(void);
179 * Switch to usermode gs and return to 32-bit usermode using
180 * sysret. Used to return to 32-on-64 compat processes.
181 * Other usermode register state, including %esp, must already
184 void (*usergs_sysret32
)(void);
186 /* Normal iret. Jump to this with the standard iret stack
190 void (*swapgs
)(void);
192 void (*start_context_switch
)(struct task_struct
*prev
);
193 void (*end_context_switch
)(struct task_struct
*next
);
198 * Get/set interrupt state. save_fl and restore_fl are only
199 * expected to use X86_EFLAGS_IF; all other bits
200 * returned from save_fl are undefined, and may be ignored by
203 * NOTE: These functions callers expect the callee to preserve
204 * more registers than the standard C calling convention.
206 struct paravirt_callee_save save_fl
;
207 struct paravirt_callee_save restore_fl
;
208 struct paravirt_callee_save irq_disable
;
209 struct paravirt_callee_save irq_enable
;
211 void (*safe_halt
)(void);
215 void (*adjust_exception_frame
)(void);
220 #ifdef CONFIG_X86_LOCAL_APIC
221 void (*setup_boot_clock
)(void);
222 void (*setup_secondary_clock
)(void);
224 void (*startup_ipi_hook
)(int phys_apicid
,
225 unsigned long start_eip
,
226 unsigned long start_esp
);
231 unsigned long (*read_cr2
)(void);
232 void (*write_cr2
)(unsigned long);
234 unsigned long (*read_cr3
)(void);
235 void (*write_cr3
)(unsigned long);
238 * Hooks for intercepting the creation/use/destruction of an
241 void (*activate_mm
)(struct mm_struct
*prev
,
242 struct mm_struct
*next
);
243 void (*dup_mmap
)(struct mm_struct
*oldmm
,
244 struct mm_struct
*mm
);
245 void (*exit_mmap
)(struct mm_struct
*mm
);
249 void (*flush_tlb_user
)(void);
250 void (*flush_tlb_kernel
)(void);
251 void (*flush_tlb_single
)(unsigned long addr
);
252 void (*flush_tlb_others
)(const struct cpumask
*cpus
,
253 struct mm_struct
*mm
,
256 /* Hooks for allocating and freeing a pagetable top-level */
257 int (*pgd_alloc
)(struct mm_struct
*mm
);
258 void (*pgd_free
)(struct mm_struct
*mm
, pgd_t
*pgd
);
261 * Hooks for allocating/releasing pagetable pages when they're
262 * attached to a pagetable
264 void (*alloc_pte
)(struct mm_struct
*mm
, unsigned long pfn
);
265 void (*alloc_pmd
)(struct mm_struct
*mm
, unsigned long pfn
);
266 void (*alloc_pmd_clone
)(unsigned long pfn
, unsigned long clonepfn
, unsigned long start
, unsigned long count
);
267 void (*alloc_pud
)(struct mm_struct
*mm
, unsigned long pfn
);
268 void (*release_pte
)(unsigned long pfn
);
269 void (*release_pmd
)(unsigned long pfn
);
270 void (*release_pud
)(unsigned long pfn
);
272 /* Pagetable manipulation functions */
273 void (*set_pte
)(pte_t
*ptep
, pte_t pteval
);
274 void (*set_pte_at
)(struct mm_struct
*mm
, unsigned long addr
,
275 pte_t
*ptep
, pte_t pteval
);
276 void (*set_pmd
)(pmd_t
*pmdp
, pmd_t pmdval
);
277 void (*pte_update
)(struct mm_struct
*mm
, unsigned long addr
,
279 void (*pte_update_defer
)(struct mm_struct
*mm
,
280 unsigned long addr
, pte_t
*ptep
);
282 pte_t (*ptep_modify_prot_start
)(struct mm_struct
*mm
, unsigned long addr
,
284 void (*ptep_modify_prot_commit
)(struct mm_struct
*mm
, unsigned long addr
,
285 pte_t
*ptep
, pte_t pte
);
287 struct paravirt_callee_save pte_val
;
288 struct paravirt_callee_save make_pte
;
290 struct paravirt_callee_save pgd_val
;
291 struct paravirt_callee_save make_pgd
;
293 #if PAGETABLE_LEVELS >= 3
294 #ifdef CONFIG_X86_PAE
295 void (*set_pte_atomic
)(pte_t
*ptep
, pte_t pteval
);
296 void (*pte_clear
)(struct mm_struct
*mm
, unsigned long addr
,
298 void (*pmd_clear
)(pmd_t
*pmdp
);
300 #endif /* CONFIG_X86_PAE */
302 void (*set_pud
)(pud_t
*pudp
, pud_t pudval
);
304 struct paravirt_callee_save pmd_val
;
305 struct paravirt_callee_save make_pmd
;
307 #if PAGETABLE_LEVELS == 4
308 struct paravirt_callee_save pud_val
;
309 struct paravirt_callee_save make_pud
;
311 void (*set_pgd
)(pgd_t
*pudp
, pgd_t pgdval
);
312 #endif /* PAGETABLE_LEVELS == 4 */
313 #endif /* PAGETABLE_LEVELS >= 3 */
315 #ifdef CONFIG_HIGHPTE
316 void *(*kmap_atomic_pte
)(struct page
*page
, enum km_type type
);
319 struct pv_lazy_ops lazy_mode
;
323 /* Sometimes the physical address is a pfn, and sometimes its
324 an mfn. We can tell which is which from the index. */
325 void (*set_fixmap
)(unsigned /* enum fixed_addresses */ idx
,
326 phys_addr_t phys
, pgprot_t flags
);
331 int (*spin_is_locked
)(struct raw_spinlock
*lock
);
332 int (*spin_is_contended
)(struct raw_spinlock
*lock
);
333 void (*spin_lock
)(struct raw_spinlock
*lock
);
334 void (*spin_lock_flags
)(struct raw_spinlock
*lock
, unsigned long flags
);
335 int (*spin_trylock
)(struct raw_spinlock
*lock
);
336 void (*spin_unlock
)(struct raw_spinlock
*lock
);
339 /* This contains all the paravirt structures: we get a convenient
340 * number for each function using the offset which we use to indicate
342 struct paravirt_patch_template
{
343 struct pv_init_ops pv_init_ops
;
344 struct pv_time_ops pv_time_ops
;
345 struct pv_cpu_ops pv_cpu_ops
;
346 struct pv_irq_ops pv_irq_ops
;
347 struct pv_apic_ops pv_apic_ops
;
348 struct pv_mmu_ops pv_mmu_ops
;
349 struct pv_lock_ops pv_lock_ops
;
352 extern struct pv_info pv_info
;
353 extern struct pv_init_ops pv_init_ops
;
354 extern struct pv_time_ops pv_time_ops
;
355 extern struct pv_cpu_ops pv_cpu_ops
;
356 extern struct pv_irq_ops pv_irq_ops
;
357 extern struct pv_apic_ops pv_apic_ops
;
358 extern struct pv_mmu_ops pv_mmu_ops
;
359 extern struct pv_lock_ops pv_lock_ops
;
361 #define PARAVIRT_PATCH(x) \
362 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
364 #define paravirt_type(op) \
365 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
366 [paravirt_opptr] "i" (&(op))
367 #define paravirt_clobber(clobber) \
368 [paravirt_clobber] "i" (clobber)
371 * Generate some code, and mark it as patchable by the
372 * apply_paravirt() alternate instruction patcher.
374 #define _paravirt_alt(insn_string, type, clobber) \
375 "771:\n\t" insn_string "\n" "772:\n" \
376 ".pushsection .parainstructions,\"a\"\n" \
379 " .byte " type "\n" \
380 " .byte 772b-771b\n" \
381 " .short " clobber "\n" \
384 /* Generate patchable code, with the default asm parameters. */
385 #define paravirt_alt(insn_string) \
386 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
388 /* Simple instruction patching code. */
389 #define DEF_NATIVE(ops, name, code) \
390 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
391 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
393 unsigned paravirt_patch_nop(void);
394 unsigned paravirt_patch_ident_32(void *insnbuf
, unsigned len
);
395 unsigned paravirt_patch_ident_64(void *insnbuf
, unsigned len
);
396 unsigned paravirt_patch_ignore(unsigned len
);
397 unsigned paravirt_patch_call(void *insnbuf
,
398 const void *target
, u16 tgt_clobbers
,
399 unsigned long addr
, u16 site_clobbers
,
401 unsigned paravirt_patch_jmp(void *insnbuf
, const void *target
,
402 unsigned long addr
, unsigned len
);
403 unsigned paravirt_patch_default(u8 type
, u16 clobbers
, void *insnbuf
,
404 unsigned long addr
, unsigned len
);
406 unsigned paravirt_patch_insns(void *insnbuf
, unsigned len
,
407 const char *start
, const char *end
);
409 unsigned native_patch(u8 type
, u16 clobbers
, void *ibuf
,
410 unsigned long addr
, unsigned len
);
412 int paravirt_disable_iospace(void);
415 * This generates an indirect call based on the operation type number.
416 * The type number, computed in PARAVIRT_PATCH, is derived from the
417 * offset into the paravirt_patch_template structure, and can therefore be
418 * freely converted back into a structure offset.
420 #define PARAVIRT_CALL "call *%c[paravirt_opptr];"
423 * These macros are intended to wrap calls through one of the paravirt
424 * ops structs, so that they can be later identified and patched at
427 * Normally, a call to a pv_op function is a simple indirect call:
428 * (pv_op_struct.operations)(args...).
430 * Unfortunately, this is a relatively slow operation for modern CPUs,
431 * because it cannot necessarily determine what the destination
432 * address is. In this case, the address is a runtime constant, so at
433 * the very least we can patch the call to e a simple direct call, or
434 * ideally, patch an inline implementation into the callsite. (Direct
435 * calls are essentially free, because the call and return addresses
436 * are completely predictable.)
438 * For i386, these macros rely on the standard gcc "regparm(3)" calling
439 * convention, in which the first three arguments are placed in %eax,
440 * %edx, %ecx (in that order), and the remaining arguments are placed
441 * on the stack. All caller-save registers (eax,edx,ecx) are expected
442 * to be modified (either clobbered or used for return values).
443 * X86_64, on the other hand, already specifies a register-based calling
444 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
445 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
446 * special handling for dealing with 4 arguments, unlike i386.
447 * However, x86_64 also have to clobber all caller saved registers, which
448 * unfortunately, are quite a bit (r8 - r11)
450 * The call instruction itself is marked by placing its start address
451 * and size into the .parainstructions section, so that
452 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
453 * appropriate patching under the control of the backend pv_init_ops
456 * Unfortunately there's no way to get gcc to generate the args setup
457 * for the call, and then allow the call itself to be generated by an
458 * inline asm. Because of this, we must do the complete arg setup and
459 * return value handling from within these macros. This is fairly
462 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
463 * It could be extended to more arguments, but there would be little
464 * to be gained from that. For each number of arguments, there are
465 * the two VCALL and CALL variants for void and non-void functions.
467 * When there is a return value, the invoker of the macro must specify
468 * the return type. The macro then uses sizeof() on that type to
469 * determine whether its a 32 or 64 bit value, and places the return
470 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
471 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
472 * the return value size.
474 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
475 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
478 * Small structures are passed and returned in registers. The macro
479 * calling convention can't directly deal with this, so the wrapper
480 * functions must do this.
482 * These PVOP_* macros are only defined within this header. This
483 * means that all uses must be wrapped in inline functions. This also
484 * makes sure the incoming and outgoing types are always correct.
487 #define PVOP_VCALL_ARGS \
488 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
489 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
491 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
492 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
493 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
495 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
497 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
499 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
500 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
502 #define EXTRA_CLOBBERS
503 #define VEXTRA_CLOBBERS
504 #else /* CONFIG_X86_64 */
505 #define PVOP_VCALL_ARGS \
506 unsigned long __edi = __edi, __esi = __esi, \
507 __edx = __edx, __ecx = __ecx
508 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax
510 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
511 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
512 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
513 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
515 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \
516 "=S" (__esi), "=d" (__edx), \
518 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
520 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
521 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
523 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
524 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
525 #endif /* CONFIG_X86_32 */
527 #ifdef CONFIG_PARAVIRT_DEBUG
528 #define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
530 #define PVOP_TEST_NULL(op) ((void)op)
533 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
538 PVOP_TEST_NULL(op); \
539 /* This is 32-bit specific, but is okay in 64-bit */ \
540 /* since this condition will never hold */ \
541 if (sizeof(rettype) > sizeof(unsigned long)) { \
543 paravirt_alt(PARAVIRT_CALL) \
546 : paravirt_type(op), \
547 paravirt_clobber(clbr), \
549 : "memory", "cc" extra_clbr); \
550 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
553 paravirt_alt(PARAVIRT_CALL) \
556 : paravirt_type(op), \
557 paravirt_clobber(clbr), \
559 : "memory", "cc" extra_clbr); \
560 __ret = (rettype)__eax; \
565 #define __PVOP_CALL(rettype, op, pre, post, ...) \
566 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
567 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
569 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
570 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
571 PVOP_CALLEE_CLOBBERS, , \
572 pre, post, ##__VA_ARGS__)
575 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
578 PVOP_TEST_NULL(op); \
580 paravirt_alt(PARAVIRT_CALL) \
583 : paravirt_type(op), \
584 paravirt_clobber(clbr), \
586 : "memory", "cc" extra_clbr); \
589 #define __PVOP_VCALL(op, pre, post, ...) \
590 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
592 pre, post, ##__VA_ARGS__)
594 #define __PVOP_VCALLEESAVE(rettype, op, pre, post, ...) \
595 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
596 PVOP_VCALLEE_CLOBBERS, , \
597 pre, post, ##__VA_ARGS__)
601 #define PVOP_CALL0(rettype, op) \
602 __PVOP_CALL(rettype, op, "", "")
603 #define PVOP_VCALL0(op) \
604 __PVOP_VCALL(op, "", "")
606 #define PVOP_CALLEE0(rettype, op) \
607 __PVOP_CALLEESAVE(rettype, op, "", "")
608 #define PVOP_VCALLEE0(op) \
609 __PVOP_VCALLEESAVE(op, "", "")
612 #define PVOP_CALL1(rettype, op, arg1) \
613 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
614 #define PVOP_VCALL1(op, arg1) \
615 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
617 #define PVOP_CALLEE1(rettype, op, arg1) \
618 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
619 #define PVOP_VCALLEE1(op, arg1) \
620 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
623 #define PVOP_CALL2(rettype, op, arg1, arg2) \
624 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
625 PVOP_CALL_ARG2(arg2))
626 #define PVOP_VCALL2(op, arg1, arg2) \
627 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
628 PVOP_CALL_ARG2(arg2))
630 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \
631 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
632 PVOP_CALL_ARG2(arg2))
633 #define PVOP_VCALLEE2(op, arg1, arg2) \
634 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
635 PVOP_CALL_ARG2(arg2))
638 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
639 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
640 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
641 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
642 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
643 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
645 /* This is the only difference in x86_64. We can make it much simpler */
647 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
648 __PVOP_CALL(rettype, op, \
649 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
650 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
651 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
652 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
654 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
655 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
656 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
658 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
659 __PVOP_CALL(rettype, op, "", "", \
660 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
661 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
662 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
663 __PVOP_VCALL(op, "", "", \
664 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
665 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
668 /* Lazy mode for batching updates / context switch */
669 enum paravirt_lazy_mode
{
675 enum paravirt_lazy_mode
paravirt_get_lazy_mode(void);
676 void paravirt_start_context_switch(struct task_struct
*prev
);
677 void paravirt_end_context_switch(struct task_struct
*next
);
679 void paravirt_enter_lazy_mmu(void);
680 void paravirt_leave_lazy_mmu(void);
682 void _paravirt_nop(void);
683 u32
_paravirt_ident_32(u32
);
684 u64
_paravirt_ident_64(u64
);
686 #define paravirt_nop ((void *)_paravirt_nop)
688 /* These all sit in the .parainstructions section to tell us what to patch. */
689 struct paravirt_patch_site
{
690 u8
*instr
; /* original instructions */
691 u8 instrtype
; /* type of this instruction */
692 u8 len
; /* length of original instruction */
693 u16 clobbers
; /* what registers you may clobber */
696 extern struct paravirt_patch_site __parainstructions
[],
697 __parainstructions_end
[];
699 #endif /* __ASSEMBLY__ */
701 #endif /* _ASM_X86_PARAVIRT_TYPES_H */