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 void (*post_allocator_init
)(void);
86 /* Print a banner to identify the environment */
92 /* Set deferred update mode, used for batching operations. */
98 void (*time_init
)(void);
100 /* Set and set time of day */
101 unsigned long (*get_wallclock
)(void);
102 int (*set_wallclock
)(unsigned long);
104 unsigned long long (*sched_clock
)(void);
105 unsigned long (*get_tsc_khz
)(void);
109 /* hooks for various privileged instructions */
110 unsigned long (*get_debugreg
)(int regno
);
111 void (*set_debugreg
)(int regno
, unsigned long value
);
115 unsigned long (*read_cr0
)(void);
116 void (*write_cr0
)(unsigned long);
118 unsigned long (*read_cr4_safe
)(void);
119 unsigned long (*read_cr4
)(void);
120 void (*write_cr4
)(unsigned long);
123 unsigned long (*read_cr8
)(void);
124 void (*write_cr8
)(unsigned long);
127 /* Segment descriptor handling */
128 void (*load_tr_desc
)(void);
129 void (*load_gdt
)(const struct desc_ptr
*);
130 void (*load_idt
)(const struct desc_ptr
*);
131 void (*store_gdt
)(struct desc_ptr
*);
132 void (*store_idt
)(struct desc_ptr
*);
133 void (*set_ldt
)(const void *desc
, unsigned entries
);
134 unsigned long (*store_tr
)(void);
135 void (*load_tls
)(struct thread_struct
*t
, unsigned int cpu
);
137 void (*load_gs_index
)(unsigned int idx
);
139 void (*write_ldt_entry
)(struct desc_struct
*ldt
, int entrynum
,
141 void (*write_gdt_entry
)(struct desc_struct
*,
142 int entrynum
, const void *desc
, int size
);
143 void (*write_idt_entry
)(gate_desc
*,
144 int entrynum
, const gate_desc
*gate
);
145 void (*alloc_ldt
)(struct desc_struct
*ldt
, unsigned entries
);
146 void (*free_ldt
)(struct desc_struct
*ldt
, unsigned entries
);
148 void (*load_sp0
)(struct tss_struct
*tss
, struct thread_struct
*t
);
150 void (*set_iopl_mask
)(unsigned mask
);
152 void (*wbinvd
)(void);
153 void (*io_delay
)(void);
155 /* cpuid emulation, mostly so that caps bits can be disabled */
156 void (*cpuid
)(unsigned int *eax
, unsigned int *ebx
,
157 unsigned int *ecx
, unsigned int *edx
);
159 /* MSR, PMC and TSR operations.
160 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
161 u64 (*read_msr_amd
)(unsigned int msr
, int *err
);
162 u64 (*read_msr
)(unsigned int msr
, int *err
);
163 int (*write_msr
)(unsigned int msr
, unsigned low
, unsigned high
);
165 u64 (*read_tsc
)(void);
166 u64 (*read_pmc
)(int counter
);
167 unsigned long long (*read_tscp
)(unsigned int *aux
);
170 * Atomically enable interrupts and return to userspace. This
171 * is only ever used to return to 32-bit processes; in a
172 * 64-bit kernel, it's used for 32-on-64 compat processes, but
173 * never native 64-bit processes. (Jump, not call.)
175 void (*irq_enable_sysexit
)(void);
178 * Switch to usermode gs and return to 64-bit usermode using
179 * sysret. Only used in 64-bit kernels to return to 64-bit
180 * processes. Usermode register state, including %rsp, must
181 * already be restored.
183 void (*usergs_sysret64
)(void);
186 * Switch to usermode gs and return to 32-bit usermode using
187 * sysret. Used to return to 32-on-64 compat processes.
188 * Other usermode register state, including %esp, must already
191 void (*usergs_sysret32
)(void);
193 /* Normal iret. Jump to this with the standard iret stack
197 void (*swapgs
)(void);
199 void (*start_context_switch
)(struct task_struct
*prev
);
200 void (*end_context_switch
)(struct task_struct
*next
);
205 * Get/set interrupt state. save_fl and restore_fl are only
206 * expected to use X86_EFLAGS_IF; all other bits
207 * returned from save_fl are undefined, and may be ignored by
210 * NOTE: These functions callers expect the callee to preserve
211 * more registers than the standard C calling convention.
213 struct paravirt_callee_save save_fl
;
214 struct paravirt_callee_save restore_fl
;
215 struct paravirt_callee_save irq_disable
;
216 struct paravirt_callee_save irq_enable
;
218 void (*safe_halt
)(void);
222 void (*adjust_exception_frame
)(void);
227 #ifdef CONFIG_X86_LOCAL_APIC
228 void (*setup_boot_clock
)(void);
229 void (*setup_secondary_clock
)(void);
231 void (*startup_ipi_hook
)(int phys_apicid
,
232 unsigned long start_eip
,
233 unsigned long start_esp
);
239 * Called before/after init_mm pagetable setup. setup_start
240 * may reset %cr3, and may pre-install parts of the pagetable;
241 * pagetable setup is expected to preserve any existing
244 void (*pagetable_setup_start
)(pgd_t
*pgd_base
);
245 void (*pagetable_setup_done
)(pgd_t
*pgd_base
);
247 unsigned long (*read_cr2
)(void);
248 void (*write_cr2
)(unsigned long);
250 unsigned long (*read_cr3
)(void);
251 void (*write_cr3
)(unsigned long);
254 * Hooks for intercepting the creation/use/destruction of an
257 void (*activate_mm
)(struct mm_struct
*prev
,
258 struct mm_struct
*next
);
259 void (*dup_mmap
)(struct mm_struct
*oldmm
,
260 struct mm_struct
*mm
);
261 void (*exit_mmap
)(struct mm_struct
*mm
);
265 void (*flush_tlb_user
)(void);
266 void (*flush_tlb_kernel
)(void);
267 void (*flush_tlb_single
)(unsigned long addr
);
268 void (*flush_tlb_others
)(const struct cpumask
*cpus
,
269 struct mm_struct
*mm
,
272 /* Hooks for allocating and freeing a pagetable top-level */
273 int (*pgd_alloc
)(struct mm_struct
*mm
);
274 void (*pgd_free
)(struct mm_struct
*mm
, pgd_t
*pgd
);
277 * Hooks for allocating/releasing pagetable pages when they're
278 * attached to a pagetable
280 void (*alloc_pte
)(struct mm_struct
*mm
, unsigned long pfn
);
281 void (*alloc_pmd
)(struct mm_struct
*mm
, unsigned long pfn
);
282 void (*alloc_pmd_clone
)(unsigned long pfn
, unsigned long clonepfn
, unsigned long start
, unsigned long count
);
283 void (*alloc_pud
)(struct mm_struct
*mm
, unsigned long pfn
);
284 void (*release_pte
)(unsigned long pfn
);
285 void (*release_pmd
)(unsigned long pfn
);
286 void (*release_pud
)(unsigned long pfn
);
288 /* Pagetable manipulation functions */
289 void (*set_pte
)(pte_t
*ptep
, pte_t pteval
);
290 void (*set_pte_at
)(struct mm_struct
*mm
, unsigned long addr
,
291 pte_t
*ptep
, pte_t pteval
);
292 void (*set_pmd
)(pmd_t
*pmdp
, pmd_t pmdval
);
293 void (*pte_update
)(struct mm_struct
*mm
, unsigned long addr
,
295 void (*pte_update_defer
)(struct mm_struct
*mm
,
296 unsigned long addr
, pte_t
*ptep
);
298 pte_t (*ptep_modify_prot_start
)(struct mm_struct
*mm
, unsigned long addr
,
300 void (*ptep_modify_prot_commit
)(struct mm_struct
*mm
, unsigned long addr
,
301 pte_t
*ptep
, pte_t pte
);
303 struct paravirt_callee_save pte_val
;
304 struct paravirt_callee_save make_pte
;
306 struct paravirt_callee_save pgd_val
;
307 struct paravirt_callee_save make_pgd
;
309 #if PAGETABLE_LEVELS >= 3
310 #ifdef CONFIG_X86_PAE
311 void (*set_pte_atomic
)(pte_t
*ptep
, pte_t pteval
);
312 void (*pte_clear
)(struct mm_struct
*mm
, unsigned long addr
,
314 void (*pmd_clear
)(pmd_t
*pmdp
);
316 #endif /* CONFIG_X86_PAE */
318 void (*set_pud
)(pud_t
*pudp
, pud_t pudval
);
320 struct paravirt_callee_save pmd_val
;
321 struct paravirt_callee_save make_pmd
;
323 #if PAGETABLE_LEVELS == 4
324 struct paravirt_callee_save pud_val
;
325 struct paravirt_callee_save make_pud
;
327 void (*set_pgd
)(pgd_t
*pudp
, pgd_t pgdval
);
328 #endif /* PAGETABLE_LEVELS == 4 */
329 #endif /* PAGETABLE_LEVELS >= 3 */
331 #ifdef CONFIG_HIGHPTE
332 void *(*kmap_atomic_pte
)(struct page
*page
, enum km_type type
);
335 struct pv_lazy_ops lazy_mode
;
339 /* Sometimes the physical address is a pfn, and sometimes its
340 an mfn. We can tell which is which from the index. */
341 void (*set_fixmap
)(unsigned /* enum fixed_addresses */ idx
,
342 phys_addr_t phys
, pgprot_t flags
);
347 int (*spin_is_locked
)(struct raw_spinlock
*lock
);
348 int (*spin_is_contended
)(struct raw_spinlock
*lock
);
349 void (*spin_lock
)(struct raw_spinlock
*lock
);
350 void (*spin_lock_flags
)(struct raw_spinlock
*lock
, unsigned long flags
);
351 int (*spin_trylock
)(struct raw_spinlock
*lock
);
352 void (*spin_unlock
)(struct raw_spinlock
*lock
);
355 /* This contains all the paravirt structures: we get a convenient
356 * number for each function using the offset which we use to indicate
358 struct paravirt_patch_template
{
359 struct pv_init_ops pv_init_ops
;
360 struct pv_time_ops pv_time_ops
;
361 struct pv_cpu_ops pv_cpu_ops
;
362 struct pv_irq_ops pv_irq_ops
;
363 struct pv_apic_ops pv_apic_ops
;
364 struct pv_mmu_ops pv_mmu_ops
;
365 struct pv_lock_ops pv_lock_ops
;
368 extern struct pv_info pv_info
;
369 extern struct pv_init_ops pv_init_ops
;
370 extern struct pv_time_ops pv_time_ops
;
371 extern struct pv_cpu_ops pv_cpu_ops
;
372 extern struct pv_irq_ops pv_irq_ops
;
373 extern struct pv_apic_ops pv_apic_ops
;
374 extern struct pv_mmu_ops pv_mmu_ops
;
375 extern struct pv_lock_ops pv_lock_ops
;
377 #define PARAVIRT_PATCH(x) \
378 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
380 #define paravirt_type(op) \
381 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
382 [paravirt_opptr] "i" (&(op))
383 #define paravirt_clobber(clobber) \
384 [paravirt_clobber] "i" (clobber)
387 * Generate some code, and mark it as patchable by the
388 * apply_paravirt() alternate instruction patcher.
390 #define _paravirt_alt(insn_string, type, clobber) \
391 "771:\n\t" insn_string "\n" "772:\n" \
392 ".pushsection .parainstructions,\"a\"\n" \
395 " .byte " type "\n" \
396 " .byte 772b-771b\n" \
397 " .short " clobber "\n" \
400 /* Generate patchable code, with the default asm parameters. */
401 #define paravirt_alt(insn_string) \
402 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
404 /* Simple instruction patching code. */
405 #define DEF_NATIVE(ops, name, code) \
406 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
407 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
409 unsigned paravirt_patch_nop(void);
410 unsigned paravirt_patch_ident_32(void *insnbuf
, unsigned len
);
411 unsigned paravirt_patch_ident_64(void *insnbuf
, unsigned len
);
412 unsigned paravirt_patch_ignore(unsigned len
);
413 unsigned paravirt_patch_call(void *insnbuf
,
414 const void *target
, u16 tgt_clobbers
,
415 unsigned long addr
, u16 site_clobbers
,
417 unsigned paravirt_patch_jmp(void *insnbuf
, const void *target
,
418 unsigned long addr
, unsigned len
);
419 unsigned paravirt_patch_default(u8 type
, u16 clobbers
, void *insnbuf
,
420 unsigned long addr
, unsigned len
);
422 unsigned paravirt_patch_insns(void *insnbuf
, unsigned len
,
423 const char *start
, const char *end
);
425 unsigned native_patch(u8 type
, u16 clobbers
, void *ibuf
,
426 unsigned long addr
, unsigned len
);
428 int paravirt_disable_iospace(void);
431 * This generates an indirect call based on the operation type number.
432 * The type number, computed in PARAVIRT_PATCH, is derived from the
433 * offset into the paravirt_patch_template structure, and can therefore be
434 * freely converted back into a structure offset.
436 #define PARAVIRT_CALL "call *%c[paravirt_opptr];"
439 * These macros are intended to wrap calls through one of the paravirt
440 * ops structs, so that they can be later identified and patched at
443 * Normally, a call to a pv_op function is a simple indirect call:
444 * (pv_op_struct.operations)(args...).
446 * Unfortunately, this is a relatively slow operation for modern CPUs,
447 * because it cannot necessarily determine what the destination
448 * address is. In this case, the address is a runtime constant, so at
449 * the very least we can patch the call to e a simple direct call, or
450 * ideally, patch an inline implementation into the callsite. (Direct
451 * calls are essentially free, because the call and return addresses
452 * are completely predictable.)
454 * For i386, these macros rely on the standard gcc "regparm(3)" calling
455 * convention, in which the first three arguments are placed in %eax,
456 * %edx, %ecx (in that order), and the remaining arguments are placed
457 * on the stack. All caller-save registers (eax,edx,ecx) are expected
458 * to be modified (either clobbered or used for return values).
459 * X86_64, on the other hand, already specifies a register-based calling
460 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
461 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
462 * special handling for dealing with 4 arguments, unlike i386.
463 * However, x86_64 also have to clobber all caller saved registers, which
464 * unfortunately, are quite a bit (r8 - r11)
466 * The call instruction itself is marked by placing its start address
467 * and size into the .parainstructions section, so that
468 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
469 * appropriate patching under the control of the backend pv_init_ops
472 * Unfortunately there's no way to get gcc to generate the args setup
473 * for the call, and then allow the call itself to be generated by an
474 * inline asm. Because of this, we must do the complete arg setup and
475 * return value handling from within these macros. This is fairly
478 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
479 * It could be extended to more arguments, but there would be little
480 * to be gained from that. For each number of arguments, there are
481 * the two VCALL and CALL variants for void and non-void functions.
483 * When there is a return value, the invoker of the macro must specify
484 * the return type. The macro then uses sizeof() on that type to
485 * determine whether its a 32 or 64 bit value, and places the return
486 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
487 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
488 * the return value size.
490 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
491 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
494 * Small structures are passed and returned in registers. The macro
495 * calling convention can't directly deal with this, so the wrapper
496 * functions must do this.
498 * These PVOP_* macros are only defined within this header. This
499 * means that all uses must be wrapped in inline functions. This also
500 * makes sure the incoming and outgoing types are always correct.
503 #define PVOP_VCALL_ARGS \
504 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx
505 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS
507 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x))
508 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x))
509 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x))
511 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
513 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
515 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx)
516 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
518 #define EXTRA_CLOBBERS
519 #define VEXTRA_CLOBBERS
520 #else /* CONFIG_X86_64 */
521 #define PVOP_VCALL_ARGS \
522 unsigned long __edi = __edi, __esi = __esi, \
523 __edx = __edx, __ecx = __ecx
524 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax
526 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x))
527 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x))
528 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x))
529 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x))
531 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \
532 "=S" (__esi), "=d" (__edx), \
534 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
536 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax)
537 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS
539 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
540 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
541 #endif /* CONFIG_X86_32 */
543 #ifdef CONFIG_PARAVIRT_DEBUG
544 #define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
546 #define PVOP_TEST_NULL(op) ((void)op)
549 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \
554 PVOP_TEST_NULL(op); \
555 /* This is 32-bit specific, but is okay in 64-bit */ \
556 /* since this condition will never hold */ \
557 if (sizeof(rettype) > sizeof(unsigned long)) { \
559 paravirt_alt(PARAVIRT_CALL) \
562 : paravirt_type(op), \
563 paravirt_clobber(clbr), \
565 : "memory", "cc" extra_clbr); \
566 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
569 paravirt_alt(PARAVIRT_CALL) \
572 : paravirt_type(op), \
573 paravirt_clobber(clbr), \
575 : "memory", "cc" extra_clbr); \
576 __ret = (rettype)__eax; \
581 #define __PVOP_CALL(rettype, op, pre, post, ...) \
582 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \
583 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__)
585 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \
586 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
587 PVOP_CALLEE_CLOBBERS, , \
588 pre, post, ##__VA_ARGS__)
591 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \
594 PVOP_TEST_NULL(op); \
596 paravirt_alt(PARAVIRT_CALL) \
599 : paravirt_type(op), \
600 paravirt_clobber(clbr), \
602 : "memory", "cc" extra_clbr); \
605 #define __PVOP_VCALL(op, pre, post, ...) \
606 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
608 pre, post, ##__VA_ARGS__)
610 #define __PVOP_VCALLEESAVE(rettype, op, pre, post, ...) \
611 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \
612 PVOP_VCALLEE_CLOBBERS, , \
613 pre, post, ##__VA_ARGS__)
617 #define PVOP_CALL0(rettype, op) \
618 __PVOP_CALL(rettype, op, "", "")
619 #define PVOP_VCALL0(op) \
620 __PVOP_VCALL(op, "", "")
622 #define PVOP_CALLEE0(rettype, op) \
623 __PVOP_CALLEESAVE(rettype, op, "", "")
624 #define PVOP_VCALLEE0(op) \
625 __PVOP_VCALLEESAVE(op, "", "")
628 #define PVOP_CALL1(rettype, op, arg1) \
629 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
630 #define PVOP_VCALL1(op, arg1) \
631 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1))
633 #define PVOP_CALLEE1(rettype, op, arg1) \
634 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1))
635 #define PVOP_VCALLEE1(op, arg1) \
636 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1))
639 #define PVOP_CALL2(rettype, op, arg1, arg2) \
640 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
641 PVOP_CALL_ARG2(arg2))
642 #define PVOP_VCALL2(op, arg1, arg2) \
643 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
644 PVOP_CALL_ARG2(arg2))
646 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \
647 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
648 PVOP_CALL_ARG2(arg2))
649 #define PVOP_VCALLEE2(op, arg1, arg2) \
650 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \
651 PVOP_CALL_ARG2(arg2))
654 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
655 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \
656 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
657 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
658 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \
659 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3))
661 /* This is the only difference in x86_64. We can make it much simpler */
663 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
664 __PVOP_CALL(rettype, op, \
665 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
666 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
667 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4)))
668 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
670 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
671 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
672 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
674 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
675 __PVOP_CALL(rettype, op, "", "", \
676 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
677 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
678 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
679 __PVOP_VCALL(op, "", "", \
680 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \
681 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
684 /* Lazy mode for batching updates / context switch */
685 enum paravirt_lazy_mode
{
691 enum paravirt_lazy_mode
paravirt_get_lazy_mode(void);
692 void paravirt_start_context_switch(struct task_struct
*prev
);
693 void paravirt_end_context_switch(struct task_struct
*next
);
695 void paravirt_enter_lazy_mmu(void);
696 void paravirt_leave_lazy_mmu(void);
698 void _paravirt_nop(void);
699 u32
_paravirt_ident_32(u32
);
700 u64
_paravirt_ident_64(u64
);
702 #define paravirt_nop ((void *)_paravirt_nop)
704 /* These all sit in the .parainstructions section to tell us what to patch. */
705 struct paravirt_patch_site
{
706 u8
*instr
; /* original instructions */
707 u8 instrtype
; /* type of this instruction */
708 u8 len
; /* length of original instruction */
709 u16 clobbers
; /* what registers you may clobber */
712 extern struct paravirt_patch_site __parainstructions
[],
713 __parainstructions_end
[];
715 #endif /* __ASSEMBLY__ */
717 #endif /* _ASM_X86_PARAVIRT_TYPES_H */