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 */
78 * Patch may replace one of the defined code sequences with
79 * arbitrary code, subject to the same register constraints.
80 * This generally means the code is not free to clobber any
81 * registers other than EAX. The patch function should return
82 * the number of bytes of code generated, as we nop pad the
83 * rest in generic code.
85 unsigned (*patch
)(u8 type
, u16 clobber
, void *insnbuf
,
86 unsigned long addr
, unsigned len
);
91 /* Set deferred update mode, used for batching operations. */
97 unsigned long long (*sched_clock
)(void);
98 unsigned long long (*steal_clock
)(int cpu
);
99 unsigned long (*get_tsc_khz
)(void);
103 /* hooks for various privileged instructions */
104 unsigned long (*get_debugreg
)(int regno
);
105 void (*set_debugreg
)(int regno
, unsigned long value
);
109 unsigned long (*read_cr0
)(void);
110 void (*write_cr0
)(unsigned long);
112 unsigned long (*read_cr4_safe
)(void);
113 unsigned long (*read_cr4
)(void);
114 void (*write_cr4
)(unsigned long);
117 unsigned long (*read_cr8
)(void);
118 void (*write_cr8
)(unsigned long);
121 /* Segment descriptor handling */
122 void (*load_tr_desc
)(void);
123 void (*load_gdt
)(const struct desc_ptr
*);
124 void (*load_idt
)(const struct desc_ptr
*);
125 void (*store_gdt
)(struct desc_ptr
*);
126 void (*store_idt
)(struct desc_ptr
*);
127 void (*set_ldt
)(const void *desc
, unsigned entries
);
128 unsigned long (*store_tr
)(void);
129 void (*load_tls
)(struct thread_struct
*t
, unsigned int cpu
);
131 void (*load_gs_index
)(unsigned int idx
);
133 void (*write_ldt_entry
)(struct desc_struct
*ldt
, int entrynum
,
135 void (*write_gdt_entry
)(struct desc_struct
*,
136 int entrynum
, const void *desc
, int size
);
137 void (*write_idt_entry
)(gate_desc
*,
138 int entrynum
, const gate_desc
*gate
);
139 void (*alloc_ldt
)(struct desc_struct
*ldt
, unsigned entries
);
140 void (*free_ldt
)(struct desc_struct
*ldt
, unsigned entries
);
142 void (*load_sp0
)(struct tss_struct
*tss
, struct thread_struct
*t
);
144 void (*set_iopl_mask
)(unsigned mask
);
146 void (*wbinvd
)(void);
147 void (*io_delay
)(void);
149 /* cpuid emulation, mostly so that caps bits can be disabled */
150 void (*cpuid
)(unsigned int *eax
, unsigned int *ebx
,
151 unsigned int *ecx
, unsigned int *edx
);
153 /* MSR, PMC and TSR operations.
154 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
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 (*startup_ipi_hook
)(int phys_apicid
,
222 unsigned long start_eip
,
223 unsigned long start_esp
);
228 unsigned long (*read_cr2
)(void);
229 void (*write_cr2
)(unsigned long);
231 unsigned long (*read_cr3
)(void);
232 void (*write_cr3
)(unsigned long);
235 * Hooks for intercepting the creation/use/destruction of an
238 void (*activate_mm
)(struct mm_struct
*prev
,
239 struct mm_struct
*next
);
240 void (*dup_mmap
)(struct mm_struct
*oldmm
,
241 struct mm_struct
*mm
);
242 void (*exit_mmap
)(struct mm_struct
*mm
);
246 void (*flush_tlb_user
)(void);
247 void (*flush_tlb_kernel
)(void);
248 void (*flush_tlb_single
)(unsigned long addr
);
249 void (*flush_tlb_others
)(const struct cpumask
*cpus
,
250 struct mm_struct
*mm
,
254 /* Hooks for allocating and freeing a pagetable top-level */
255 int (*pgd_alloc
)(struct mm_struct
*mm
);
256 void (*pgd_free
)(struct mm_struct
*mm
, pgd_t
*pgd
);
259 * Hooks for allocating/releasing pagetable pages when they're
260 * attached to a pagetable
262 void (*alloc_pte
)(struct mm_struct
*mm
, unsigned long pfn
);
263 void (*alloc_pmd
)(struct mm_struct
*mm
, unsigned long pfn
);
264 void (*alloc_pud
)(struct mm_struct
*mm
, unsigned long pfn
);
265 void (*release_pte
)(unsigned long pfn
);
266 void (*release_pmd
)(unsigned long pfn
);
267 void (*release_pud
)(unsigned long pfn
);
269 /* Pagetable manipulation functions */
270 void (*set_pte
)(pte_t
*ptep
, pte_t pteval
);
271 void (*set_pte_at
)(struct mm_struct
*mm
, unsigned long addr
,
272 pte_t
*ptep
, pte_t pteval
);
273 void (*set_pmd
)(pmd_t
*pmdp
, pmd_t pmdval
);
274 void (*set_pmd_at
)(struct mm_struct
*mm
, unsigned long addr
,
275 pmd_t
*pmdp
, pmd_t pmdval
);
276 void (*pte_update
)(struct mm_struct
*mm
, unsigned long addr
,
278 void (*pte_update_defer
)(struct mm_struct
*mm
,
279 unsigned long addr
, pte_t
*ptep
);
280 void (*pmd_update
)(struct mm_struct
*mm
, unsigned long addr
,
282 void (*pmd_update_defer
)(struct mm_struct
*mm
,
283 unsigned long addr
, pmd_t
*pmdp
);
285 pte_t (*ptep_modify_prot_start
)(struct mm_struct
*mm
, unsigned long addr
,
287 void (*ptep_modify_prot_commit
)(struct mm_struct
*mm
, unsigned long addr
,
288 pte_t
*ptep
, pte_t pte
);
290 struct paravirt_callee_save pte_val
;
291 struct paravirt_callee_save make_pte
;
293 struct paravirt_callee_save pgd_val
;
294 struct paravirt_callee_save make_pgd
;
296 #if PAGETABLE_LEVELS >= 3
297 #ifdef CONFIG_X86_PAE
298 void (*set_pte_atomic
)(pte_t
*ptep
, pte_t pteval
);
299 void (*pte_clear
)(struct mm_struct
*mm
, unsigned long addr
,
301 void (*pmd_clear
)(pmd_t
*pmdp
);
303 #endif /* CONFIG_X86_PAE */
305 void (*set_pud
)(pud_t
*pudp
, pud_t pudval
);
307 struct paravirt_callee_save pmd_val
;
308 struct paravirt_callee_save make_pmd
;
310 #if PAGETABLE_LEVELS == 4
311 struct paravirt_callee_save pud_val
;
312 struct paravirt_callee_save make_pud
;
314 void (*set_pgd
)(pgd_t
*pudp
, pgd_t pgdval
);
315 #endif /* PAGETABLE_LEVELS == 4 */
316 #endif /* PAGETABLE_LEVELS >= 3 */
318 struct pv_lazy_ops lazy_mode
;
322 /* Sometimes the physical address is a pfn, and sometimes its
323 an mfn. We can tell which is which from the index. */
324 void (*set_fixmap
)(unsigned /* enum fixed_addresses */ idx
,
325 phys_addr_t phys
, pgprot_t flags
);
328 struct arch_spinlock
;
330 int (*spin_is_locked
)(struct arch_spinlock
*lock
);
331 int (*spin_is_contended
)(struct arch_spinlock
*lock
);
332 void (*spin_lock
)(struct arch_spinlock
*lock
);
333 void (*spin_lock_flags
)(struct arch_spinlock
*lock
, unsigned long flags
);
334 int (*spin_trylock
)(struct arch_spinlock
*lock
);
335 void (*spin_unlock
)(struct arch_spinlock
*lock
);
338 /* This contains all the paravirt structures: we get a convenient
339 * number for each function using the offset which we use to indicate
341 struct paravirt_patch_template
{
342 struct pv_init_ops pv_init_ops
;
343 struct pv_time_ops pv_time_ops
;
344 struct pv_cpu_ops pv_cpu_ops
;
345 struct pv_irq_ops pv_irq_ops
;
346 struct pv_apic_ops pv_apic_ops
;
347 struct pv_mmu_ops pv_mmu_ops
;
348 struct pv_lock_ops pv_lock_ops
;
351 extern struct pv_info pv_info
;
352 extern struct pv_init_ops pv_init_ops
;
353 extern struct pv_time_ops pv_time_ops
;
354 extern struct pv_cpu_ops pv_cpu_ops
;
355 extern struct pv_irq_ops pv_irq_ops
;
356 extern struct pv_apic_ops pv_apic_ops
;
357 extern struct pv_mmu_ops pv_mmu_ops
;
358 extern struct pv_lock_ops pv_lock_ops
;
360 #define PARAVIRT_PATCH(x) \
361 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
363 #define paravirt_type(op) \
364 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
365 [paravirt_opptr] "i" (&(op))
366 #define paravirt_clobber(clobber) \
367 [paravirt_clobber] "i" (clobber)
370 * Generate some code, and mark it as patchable by the
371 * apply_paravirt() alternate instruction patcher.
373 #define _paravirt_alt(insn_string, type, clobber) \
374 "771:\n\t" insn_string "\n" "772:\n" \
375 ".pushsection .parainstructions,\"a\"\n" \
378 " .byte " type "\n" \
379 " .byte 772b-771b\n" \
380 " .short " clobber "\n" \
383 /* Generate patchable code, with the default asm parameters. */
384 #define paravirt_alt(insn_string) \
385 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
387 /* Simple instruction patching code. */
388 #define DEF_NATIVE(ops, name, code) \
389 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
390 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
392 unsigned paravirt_patch_nop(void);
393 unsigned paravirt_patch_ident_32(void *insnbuf
, unsigned len
);
394 unsigned paravirt_patch_ident_64(void *insnbuf
, unsigned len
);
395 unsigned paravirt_patch_ignore(unsigned len
);
396 unsigned paravirt_patch_call(void *insnbuf
,
397 const void *target
, u16 tgt_clobbers
,
398 unsigned long addr
, u16 site_clobbers
,
400 unsigned paravirt_patch_jmp(void *insnbuf
, const void *target
,
401 unsigned long addr
, unsigned len
);
402 unsigned paravirt_patch_default(u8 type
, u16 clobbers
, void *insnbuf
,
403 unsigned long addr
, unsigned len
);
405 unsigned paravirt_patch_insns(void *insnbuf
, unsigned len
,
406 const char *start
, const char *end
);
408 unsigned native_patch(u8 type
, u16 clobbers
, void *ibuf
,
409 unsigned long addr
, unsigned len
);
411 int paravirt_disable_iospace(void);
414 * This generates an indirect call based on the operation type number.
415 * The type number, computed in PARAVIRT_PATCH, is derived from the
416 * offset into the paravirt_patch_template structure, and can therefore be
417 * freely converted back into a structure offset.
419 #define PARAVIRT_CALL "call *%c[paravirt_opptr];"
422 * These macros are intended to wrap calls through one of the paravirt
423 * ops structs, so that they can be later identified and patched at
426 * Normally, a call to a pv_op function is a simple indirect call:
427 * (pv_op_struct.operations)(args...).
429 * Unfortunately, this is a relatively slow operation for modern CPUs,
430 * because it cannot necessarily determine what the destination
431 * address is. In this case, the address is a runtime constant, so at
432 * the very least we can patch the call to e a simple direct call, or
433 * ideally, patch an inline implementation into the callsite. (Direct
434 * calls are essentially free, because the call and return addresses
435 * are completely predictable.)
437 * For i386, these macros rely on the standard gcc "regparm(3)" calling
438 * convention, in which the first three arguments are placed in %eax,
439 * %edx, %ecx (in that order), and the remaining arguments are placed
440 * on the stack. All caller-save registers (eax,edx,ecx) are expected
441 * to be modified (either clobbered or used for return values).
442 * X86_64, on the other hand, already specifies a register-based calling
443 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
444 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
445 * special handling for dealing with 4 arguments, unlike i386.
446 * However, x86_64 also have to clobber all caller saved registers, which
447 * unfortunately, are quite a bit (r8 - r11)
449 * The call instruction itself is marked by placing its start address
450 * and size into the .parainstructions section, so that
451 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
452 * appropriate patching under the control of the backend pv_init_ops
455 * Unfortunately there's no way to get gcc to generate the args setup
456 * for the call, and then allow the call itself to be generated by an
457 * inline asm. Because of this, we must do the complete arg setup and
458 * return value handling from within these macros. This is fairly
461 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
462 * It could be extended to more arguments, but there would be little
463 * to be gained from that. For each number of arguments, there are
464 * the two VCALL and CALL variants for void and non-void functions.
466 * When there is a return value, the invoker of the macro must specify
467 * the return type. The macro then uses sizeof() on that type to
468 * determine whether its a 32 or 64 bit value, and places the return
469 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
470 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
471 * the return value size.
473 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
474 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
477 * Small structures are passed and returned in registers. The macro
478 * calling convention can't directly deal with this, so the wrapper
479 * functions must do this.
481 * These PVOP_* macros are only defined within this header. This
482 * means that all uses must be wrapped in inline functions. This also
483 * makes sure the incoming and outgoing types are always correct.
486 #define PVOP_VCALL_ARGS \
487 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
488 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
490 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
491 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
492 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
494 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
496 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
498 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
499 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
501 #define EXTRA_CLOBBERS
502 #define VEXTRA_CLOBBERS
503 #else /* CONFIG_X86_64 */
504 /* [re]ax isn't an arg, but the return val */
505 #define PVOP_VCALL_ARGS \
506 unsigned long __edi = __edi, __esi = __esi, \
507 __edx = __edx, __ecx = __ecx, __eax = __eax
508 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
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 /* void functions are still allowed [re]ax for scratch */
521 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
522 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
524 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
525 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
526 #endif /* CONFIG_X86_32 */
528 #ifdef CONFIG_PARAVIRT_DEBUG
529 #define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
531 #define PVOP_TEST_NULL(op) ((void)op)
534 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
539 PVOP_TEST_NULL(op); \
540 /* This is 32-bit specific, but is okay in 64-bit */ \
541 /* since this condition will never hold */ \
542 if (sizeof(rettype) > sizeof(unsigned long)) { \
544 paravirt_alt(PARAVIRT_CALL) \
547 : paravirt_type(op), \
548 paravirt_clobber(clbr), \
550 : "memory", "cc" extra_clbr); \
551 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
554 paravirt_alt(PARAVIRT_CALL) \
557 : paravirt_type(op), \
558 paravirt_clobber(clbr), \
560 : "memory", "cc" extra_clbr); \
561 __ret = (rettype)__eax; \
566 #define __PVOP_CALL(rettype, op, pre, post, ...) \
567 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
568 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
570 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
571 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
572 PVOP_CALLEE_CLOBBERS, , \
573 pre, post, ##__VA_ARGS__)
576 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
579 PVOP_TEST_NULL(op); \
581 paravirt_alt(PARAVIRT_CALL) \
584 : paravirt_type(op), \
585 paravirt_clobber(clbr), \
587 : "memory", "cc" extra_clbr); \
590 #define __PVOP_VCALL(op, pre, post, ...) \
591 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
593 pre, post, ##__VA_ARGS__)
595 #define __PVOP_VCALLEESAVE(op, pre, post, ...) \
596 ____PVOP_VCALL(op.func, CLBR_RET_REG, \
597 PVOP_VCALLEE_CLOBBERS, , \
598 pre, post, ##__VA_ARGS__)
602 #define PVOP_CALL0(rettype, op) \
603 __PVOP_CALL(rettype, op, "", "")
604 #define PVOP_VCALL0(op) \
605 __PVOP_VCALL(op, "", "")
607 #define PVOP_CALLEE0(rettype, op) \
608 __PVOP_CALLEESAVE(rettype, op, "", "")
609 #define PVOP_VCALLEE0(op) \
610 __PVOP_VCALLEESAVE(op, "", "")
613 #define PVOP_CALL1(rettype, op, arg1) \
614 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
615 #define PVOP_VCALL1(op, arg1) \
616 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
618 #define PVOP_CALLEE1(rettype, op, arg1) \
619 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
620 #define PVOP_VCALLEE1(op, arg1) \
621 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
624 #define PVOP_CALL2(rettype, op, arg1, arg2) \
625 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
626 PVOP_CALL_ARG2(arg2))
627 #define PVOP_VCALL2(op, arg1, arg2) \
628 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
629 PVOP_CALL_ARG2(arg2))
631 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \
632 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
633 PVOP_CALL_ARG2(arg2))
634 #define PVOP_VCALLEE2(op, arg1, arg2) \
635 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
636 PVOP_CALL_ARG2(arg2))
639 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
640 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
641 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
642 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
643 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
644 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
646 /* This is the only difference in x86_64. We can make it much simpler */
648 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
649 __PVOP_CALL(rettype, op, \
650 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
651 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
652 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
653 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
655 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
656 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
657 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
659 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
660 __PVOP_CALL(rettype, op, "", "", \
661 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
662 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
663 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
664 __PVOP_VCALL(op, "", "", \
665 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
666 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
669 /* Lazy mode for batching updates / context switch */
670 enum paravirt_lazy_mode
{
676 enum paravirt_lazy_mode
paravirt_get_lazy_mode(void);
677 void paravirt_start_context_switch(struct task_struct
*prev
);
678 void paravirt_end_context_switch(struct task_struct
*next
);
680 void paravirt_enter_lazy_mmu(void);
681 void paravirt_leave_lazy_mmu(void);
683 void _paravirt_nop(void);
684 u32
_paravirt_ident_32(u32
);
685 u64
_paravirt_ident_64(u64
);
687 #define paravirt_nop ((void *)_paravirt_nop)
689 /* These all sit in the .parainstructions section to tell us what to patch. */
690 struct paravirt_patch_site
{
691 u8
*instr
; /* original instructions */
692 u8 instrtype
; /* type of this instruction */
693 u8 len
; /* length of original instruction */
694 u16 clobbers
; /* what registers you may clobber */
697 extern struct paravirt_patch_site __parainstructions
[],
698 __parainstructions_end
[];
700 #endif /* __ASSEMBLY__ */
702 #endif /* _ASM_X86_PARAVIRT_TYPES_H */