1 #ifndef __ASM_PARAVIRT_H
2 #define __ASM_PARAVIRT_H
3 /* Various instructions on x86 need to be replaced for
4 * para-virtualization: those hooks are defined here. */
9 /* Bitmask of what can be clobbered: usually at least eax. */
17 #include <linux/types.h>
18 #include <linux/cpumask.h>
19 #include <asm/kmap_types.h>
23 struct Xgt_desc_struct;
28 /* Lazy mode for batching updates / context switch */
29 enum paravirt_lazy_mode {
30 PARAVIRT_LAZY_NONE = 0,
31 PARAVIRT_LAZY_MMU = 1,
32 PARAVIRT_LAZY_CPU = 2,
33 PARAVIRT_LAZY_FLUSH = 3,
38 unsigned int kernel_rpl;
39 int shared_kernel_pmd;
44 * Patch may replace one of the defined code sequences with arbitrary
45 * code, subject to the same register constraints. This generally
46 * means the code is not free to clobber any registers other than EAX.
47 * The patch function should return the number of bytes of code
48 * generated, as we nop pad the rest in generic code.
50 unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len);
52 /* Basic arch-specific setup */
53 void (*arch_setup)(void);
54 char *(*memory_setup)(void);
55 void (*post_allocator_init)(void);
57 void (*init_IRQ)(void);
58 void (*time_init)(void);
61 * Called before/after init_mm pagetable setup. setup_start
62 * may reset %cr3, and may pre-install parts of the pagetable;
63 * pagetable setup is expected to preserve any existing
66 void (*pagetable_setup_start)(pgd_t *pgd_base);
67 void (*pagetable_setup_done)(pgd_t *pgd_base);
69 /* Print a banner to identify the environment */
72 /* Set and set time of day */
73 unsigned long (*get_wallclock)(void);
74 int (*set_wallclock)(unsigned long);
76 /* cpuid emulation, mostly so that caps bits can be disabled */
77 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
78 unsigned int *ecx, unsigned int *edx);
80 /* hooks for various privileged instructions */
81 unsigned long (*get_debugreg)(int regno);
82 void (*set_debugreg)(int regno, unsigned long value);
86 unsigned long (*read_cr0)(void);
87 void (*write_cr0)(unsigned long);
89 unsigned long (*read_cr2)(void);
90 void (*write_cr2)(unsigned long);
92 unsigned long (*read_cr3)(void);
93 void (*write_cr3)(unsigned long);
95 unsigned long (*read_cr4_safe)(void);
96 unsigned long (*read_cr4)(void);
97 void (*write_cr4)(unsigned long);
100 * Get/set interrupt state. save_fl and restore_fl are only
101 * expected to use X86_EFLAGS_IF; all other bits
102 * returned from save_fl are undefined, and may be ignored by
105 unsigned long (*save_fl)(void);
106 void (*restore_fl)(unsigned long);
107 void (*irq_disable)(void);
108 void (*irq_enable)(void);
109 void (*safe_halt)(void);
112 void (*wbinvd)(void);
114 /* MSR, PMC and TSR operations.
115 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
116 u64 (*read_msr)(unsigned int msr, int *err);
117 int (*write_msr)(unsigned int msr, u64 val);
119 u64 (*read_tsc)(void);
120 u64 (*read_pmc)(void);
121 u64 (*get_scheduled_cycles)(void);
122 unsigned long (*get_cpu_khz)(void);
124 /* Segment descriptor handling */
125 void (*load_tr_desc)(void);
126 void (*load_gdt)(const struct Xgt_desc_struct *);
127 void (*load_idt)(const struct Xgt_desc_struct *);
128 void (*store_gdt)(struct Xgt_desc_struct *);
129 void (*store_idt)(struct Xgt_desc_struct *);
130 void (*set_ldt)(const void *desc, unsigned entries);
131 unsigned long (*store_tr)(void);
132 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
133 void (*write_ldt_entry)(struct desc_struct *,
134 int entrynum, u32 low, u32 high);
135 void (*write_gdt_entry)(struct desc_struct *,
136 int entrynum, u32 low, u32 high);
137 void (*write_idt_entry)(struct desc_struct *,
138 int entrynum, u32 low, u32 high);
139 void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
141 void (*set_iopl_mask)(unsigned mask);
142 void (*io_delay)(void);
145 * Hooks for intercepting the creation/use/destruction of an
148 void (*activate_mm)(struct mm_struct *prev,
149 struct mm_struct *next);
150 void (*dup_mmap)(struct mm_struct *oldmm,
151 struct mm_struct *mm);
152 void (*exit_mmap)(struct mm_struct *mm);
154 #ifdef CONFIG_X86_LOCAL_APIC
156 * Direct APIC operations, principally for VMI. Ideally
157 * these shouldn't be in this interface.
159 void (*apic_write)(unsigned long reg, unsigned long v);
160 void (*apic_write_atomic)(unsigned long reg, unsigned long v);
161 unsigned long (*apic_read)(unsigned long reg);
162 void (*setup_boot_clock)(void);
163 void (*setup_secondary_clock)(void);
165 void (*startup_ipi_hook)(int phys_apicid,
166 unsigned long start_eip,
167 unsigned long start_esp);
171 void (*flush_tlb_user)(void);
172 void (*flush_tlb_kernel)(void);
173 void (*flush_tlb_single)(unsigned long addr);
174 void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
177 /* Hooks for allocating/releasing pagetable pages */
178 void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
179 void (*alloc_pd)(u32 pfn);
180 void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
181 void (*release_pt)(u32 pfn);
182 void (*release_pd)(u32 pfn);
184 /* Pagetable manipulation functions */
185 void (*set_pte)(pte_t *ptep, pte_t pteval);
186 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
187 pte_t *ptep, pte_t pteval);
188 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
189 void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
190 void (*pte_update_defer)(struct mm_struct *mm,
191 unsigned long addr, pte_t *ptep);
193 #ifdef CONFIG_HIGHPTE
194 void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
197 #ifdef CONFIG_X86_PAE
198 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
199 void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
200 void (*set_pud)(pud_t *pudp, pud_t pudval);
201 void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
202 void (*pmd_clear)(pmd_t *pmdp);
204 unsigned long long (*pte_val)(pte_t);
205 unsigned long long (*pmd_val)(pmd_t);
206 unsigned long long (*pgd_val)(pgd_t);
208 pte_t (*make_pte)(unsigned long long pte);
209 pmd_t (*make_pmd)(unsigned long long pmd);
210 pgd_t (*make_pgd)(unsigned long long pgd);
212 unsigned long (*pte_val)(pte_t);
213 unsigned long (*pgd_val)(pgd_t);
215 pte_t (*make_pte)(unsigned long pte);
216 pgd_t (*make_pgd)(unsigned long pgd);
219 /* Set deferred update mode, used for batching operations. */
220 void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
222 /* These two are jmp to, not actually called. */
223 void (*irq_enable_sysexit)(void);
227 extern struct paravirt_ops paravirt_ops;
229 #define PARAVIRT_PATCH(x) \
230 (offsetof(struct paravirt_ops, x) / sizeof(void *))
232 #define paravirt_type(type) \
233 [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
234 #define paravirt_clobber(clobber) \
235 [paravirt_clobber] "i" (clobber)
238 * Generate some code, and mark it as patchable by the
239 * apply_paravirt() alternate instruction patcher.
241 #define _paravirt_alt(insn_string, type, clobber) \
242 "771:\n\t" insn_string "\n" "772:\n" \
243 ".pushsection .parainstructions,\"a\"\n" \
245 " .byte " type "\n" \
246 " .byte 772b-771b\n" \
247 " .short " clobber "\n" \
250 /* Generate patchable code, with the default asm parameters. */
251 #define paravirt_alt(insn_string) \
252 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
254 unsigned paravirt_patch_nop(void);
255 unsigned paravirt_patch_ignore(unsigned len);
256 unsigned paravirt_patch_call(void *target, u16 tgt_clobbers,
257 void *site, u16 site_clobbers,
259 unsigned paravirt_patch_jmp(void *target, void *site, unsigned len);
260 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *site, unsigned len);
262 unsigned paravirt_patch_insns(void *site, unsigned len,
263 const char *start, const char *end);
267 * This generates an indirect call based on the operation type number.
268 * The type number, computed in PARAVIRT_PATCH, is derived from the
269 * offset into the paravirt_ops structure, and can therefore be freely
270 * converted back into a structure offset.
272 #define PARAVIRT_CALL "call *(paravirt_ops+%c[paravirt_typenum]*4);"
275 * These macros are intended to wrap calls into a paravirt_ops
276 * operation, so that they can be later identified and patched at
279 * Normally, a call to a pv_op function is a simple indirect call:
280 * (paravirt_ops.operations)(args...).
282 * Unfortunately, this is a relatively slow operation for modern CPUs,
283 * because it cannot necessarily determine what the destination
284 * address is. In this case, the address is a runtime constant, so at
285 * the very least we can patch the call to e a simple direct call, or
286 * ideally, patch an inline implementation into the callsite. (Direct
287 * calls are essentially free, because the call and return addresses
288 * are completely predictable.)
290 * These macros rely on the standard gcc "regparm(3)" calling
291 * convention, in which the first three arguments are placed in %eax,
292 * %edx, %ecx (in that order), and the remaining arguments are placed
293 * on the stack. All caller-save registers (eax,edx,ecx) are expected
294 * to be modified (either clobbered or used for return values).
296 * The call instruction itself is marked by placing its start address
297 * and size into the .parainstructions section, so that
298 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
299 * appropriate patching under the control of the backend paravirt_ops
302 * Unfortunately there's no way to get gcc to generate the args setup
303 * for the call, and then allow the call itself to be generated by an
304 * inline asm. Because of this, we must do the complete arg setup and
305 * return value handling from within these macros. This is fairly
308 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
309 * It could be extended to more arguments, but there would be little
310 * to be gained from that. For each number of arguments, there are
311 * the two VCALL and CALL variants for void and non-void functions.
313 * When there is a return value, the invoker of the macro must specify
314 * the return type. The macro then uses sizeof() on that type to
315 * determine whether its a 32 or 64 bit value, and places the return
316 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
319 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
322 * Small structures are passed and returned in registers. The macro
323 * calling convention can't directly deal with this, so the wrapper
324 * functions must do this.
326 * These PVOP_* macros are only defined within this header. This
327 * means that all uses must be wrapped in inline functions. This also
328 * makes sure the incoming and outgoing types are always correct.
330 #define __PVOP_CALL(rettype, op, pre, post, ...) \
333 unsigned long __eax, __edx, __ecx; \
334 if (sizeof(rettype) > sizeof(unsigned long)) { \
336 paravirt_alt(PARAVIRT_CALL) \
338 : "=a" (__eax), "=d" (__edx), \
340 : paravirt_type(op), \
341 paravirt_clobber(CLBR_ANY), \
344 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
347 paravirt_alt(PARAVIRT_CALL) \
349 : "=a" (__eax), "=d" (__edx), \
351 : paravirt_type(op), \
352 paravirt_clobber(CLBR_ANY), \
355 __ret = (rettype)__eax; \
359 #define __PVOP_VCALL(op, pre, post, ...) \
361 unsigned long __eax, __edx, __ecx; \
363 paravirt_alt(PARAVIRT_CALL) \
365 : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
366 : paravirt_type(op), \
367 paravirt_clobber(CLBR_ANY), \
372 #define PVOP_CALL0(rettype, op) \
373 __PVOP_CALL(rettype, op, "", "")
374 #define PVOP_VCALL0(op) \
375 __PVOP_VCALL(op, "", "")
377 #define PVOP_CALL1(rettype, op, arg1) \
378 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)))
379 #define PVOP_VCALL1(op, arg1) \
380 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)))
382 #define PVOP_CALL2(rettype, op, arg1, arg2) \
383 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
384 #define PVOP_VCALL2(op, arg1, arg2) \
385 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
387 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
388 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), \
389 "1"((u32)(arg2)), "2"((u32)(arg3)))
390 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
391 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1"((u32)(arg2)), \
394 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
395 __PVOP_CALL(rettype, op, \
396 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
397 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
398 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
399 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
401 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
402 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
403 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
405 static inline int paravirt_enabled(void)
407 return paravirt_ops.paravirt_enabled;
410 static inline void load_esp0(struct tss_struct *tss,
411 struct thread_struct *thread)
413 PVOP_VCALL2(load_esp0, tss, thread);
416 #define ARCH_SETUP paravirt_ops.arch_setup();
417 static inline unsigned long get_wallclock(void)
419 return PVOP_CALL0(unsigned long, get_wallclock);
422 static inline int set_wallclock(unsigned long nowtime)
424 return PVOP_CALL1(int, set_wallclock, nowtime);
427 static inline void (*choose_time_init(void))(void)
429 return paravirt_ops.time_init;
432 /* The paravirtualized CPUID instruction. */
433 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
434 unsigned int *ecx, unsigned int *edx)
436 PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
440 * These special macros can be used to get or set a debugging register
442 static inline unsigned long paravirt_get_debugreg(int reg)
444 return PVOP_CALL1(unsigned long, get_debugreg, reg);
446 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
447 static inline void set_debugreg(unsigned long val, int reg)
449 PVOP_VCALL2(set_debugreg, reg, val);
452 static inline void clts(void)
457 static inline unsigned long read_cr0(void)
459 return PVOP_CALL0(unsigned long, read_cr0);
462 static inline void write_cr0(unsigned long x)
464 PVOP_VCALL1(write_cr0, x);
467 static inline unsigned long read_cr2(void)
469 return PVOP_CALL0(unsigned long, read_cr2);
472 static inline void write_cr2(unsigned long x)
474 PVOP_VCALL1(write_cr2, x);
477 static inline unsigned long read_cr3(void)
479 return PVOP_CALL0(unsigned long, read_cr3);
482 static inline void write_cr3(unsigned long x)
484 PVOP_VCALL1(write_cr3, x);
487 static inline unsigned long read_cr4(void)
489 return PVOP_CALL0(unsigned long, read_cr4);
491 static inline unsigned long read_cr4_safe(void)
493 return PVOP_CALL0(unsigned long, read_cr4_safe);
496 static inline void write_cr4(unsigned long x)
498 PVOP_VCALL1(write_cr4, x);
501 static inline void raw_safe_halt(void)
503 PVOP_VCALL0(safe_halt);
506 static inline void halt(void)
508 PVOP_VCALL0(safe_halt);
511 static inline void wbinvd(void)
516 #define get_kernel_rpl() (paravirt_ops.kernel_rpl)
518 static inline u64 paravirt_read_msr(unsigned msr, int *err)
520 return PVOP_CALL2(u64, read_msr, msr, err);
522 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
524 return PVOP_CALL3(int, write_msr, msr, low, high);
527 /* These should all do BUG_ON(_err), but our headers are too tangled. */
528 #define rdmsr(msr,val1,val2) do { \
530 u64 _l = paravirt_read_msr(msr, &_err); \
535 #define wrmsr(msr,val1,val2) do { \
536 paravirt_write_msr(msr, val1, val2); \
539 #define rdmsrl(msr,val) do { \
541 val = paravirt_read_msr(msr, &_err); \
544 #define wrmsrl(msr,val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
545 #define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
547 /* rdmsr with exception handling */
548 #define rdmsr_safe(msr,a,b) ({ \
550 u64 _l = paravirt_read_msr(msr, &_err); \
556 static inline u64 paravirt_read_tsc(void)
558 return PVOP_CALL0(u64, read_tsc);
561 #define rdtscl(low) do { \
562 u64 _l = paravirt_read_tsc(); \
566 #define rdtscll(val) (val = paravirt_read_tsc())
568 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
569 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
571 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
573 static inline unsigned long long paravirt_read_pmc(int counter)
575 return PVOP_CALL1(u64, read_pmc, counter);
578 #define rdpmc(counter,low,high) do { \
579 u64 _l = paravirt_read_pmc(counter); \
584 static inline void load_TR_desc(void)
586 PVOP_VCALL0(load_tr_desc);
588 static inline void load_gdt(const struct Xgt_desc_struct *dtr)
590 PVOP_VCALL1(load_gdt, dtr);
592 static inline void load_idt(const struct Xgt_desc_struct *dtr)
594 PVOP_VCALL1(load_idt, dtr);
596 static inline void set_ldt(const void *addr, unsigned entries)
598 PVOP_VCALL2(set_ldt, addr, entries);
600 static inline void store_gdt(struct Xgt_desc_struct *dtr)
602 PVOP_VCALL1(store_gdt, dtr);
604 static inline void store_idt(struct Xgt_desc_struct *dtr)
606 PVOP_VCALL1(store_idt, dtr);
608 static inline unsigned long paravirt_store_tr(void)
610 return PVOP_CALL0(unsigned long, store_tr);
612 #define store_tr(tr) ((tr) = paravirt_store_tr())
613 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
615 PVOP_VCALL2(load_tls, t, cpu);
617 static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
619 PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
621 static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
623 PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
625 static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
627 PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
629 static inline void set_iopl_mask(unsigned mask)
631 PVOP_VCALL1(set_iopl_mask, mask);
634 /* The paravirtualized I/O functions */
635 static inline void slow_down_io(void) {
636 paravirt_ops.io_delay();
637 #ifdef REALLY_SLOW_IO
638 paravirt_ops.io_delay();
639 paravirt_ops.io_delay();
640 paravirt_ops.io_delay();
644 #ifdef CONFIG_X86_LOCAL_APIC
646 * Basic functions accessing APICs.
648 static inline void apic_write(unsigned long reg, unsigned long v)
650 PVOP_VCALL2(apic_write, reg, v);
653 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
655 PVOP_VCALL2(apic_write_atomic, reg, v);
658 static inline unsigned long apic_read(unsigned long reg)
660 return PVOP_CALL1(unsigned long, apic_read, reg);
663 static inline void setup_boot_clock(void)
665 PVOP_VCALL0(setup_boot_clock);
668 static inline void setup_secondary_clock(void)
670 PVOP_VCALL0(setup_secondary_clock);
674 static inline void paravirt_post_allocator_init(void)
676 if (paravirt_ops.post_allocator_init)
677 (*paravirt_ops.post_allocator_init)();
680 static inline void paravirt_pagetable_setup_start(pgd_t *base)
682 if (paravirt_ops.pagetable_setup_start)
683 (*paravirt_ops.pagetable_setup_start)(base);
686 static inline void paravirt_pagetable_setup_done(pgd_t *base)
688 if (paravirt_ops.pagetable_setup_done)
689 (*paravirt_ops.pagetable_setup_done)(base);
693 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
694 unsigned long start_esp)
696 PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
700 static inline void paravirt_activate_mm(struct mm_struct *prev,
701 struct mm_struct *next)
703 PVOP_VCALL2(activate_mm, prev, next);
706 static inline void arch_dup_mmap(struct mm_struct *oldmm,
707 struct mm_struct *mm)
709 PVOP_VCALL2(dup_mmap, oldmm, mm);
712 static inline void arch_exit_mmap(struct mm_struct *mm)
714 PVOP_VCALL1(exit_mmap, mm);
717 static inline void __flush_tlb(void)
719 PVOP_VCALL0(flush_tlb_user);
721 static inline void __flush_tlb_global(void)
723 PVOP_VCALL0(flush_tlb_kernel);
725 static inline void __flush_tlb_single(unsigned long addr)
727 PVOP_VCALL1(flush_tlb_single, addr);
730 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
733 PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
736 static inline void paravirt_alloc_pt(struct mm_struct *mm, unsigned pfn)
738 PVOP_VCALL2(alloc_pt, mm, pfn);
740 static inline void paravirt_release_pt(unsigned pfn)
742 PVOP_VCALL1(release_pt, pfn);
745 static inline void paravirt_alloc_pd(unsigned pfn)
747 PVOP_VCALL1(alloc_pd, pfn);
750 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
751 unsigned start, unsigned count)
753 PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
755 static inline void paravirt_release_pd(unsigned pfn)
757 PVOP_VCALL1(release_pd, pfn);
760 #ifdef CONFIG_HIGHPTE
761 static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
764 ret = PVOP_CALL2(unsigned long, kmap_atomic_pte, page, type);
769 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
772 PVOP_VCALL3(pte_update, mm, addr, ptep);
775 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
778 PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
781 #ifdef CONFIG_X86_PAE
782 static inline pte_t __pte(unsigned long long val)
784 unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
786 return (pte_t) { ret, ret >> 32 };
789 static inline pmd_t __pmd(unsigned long long val)
791 return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
794 static inline pgd_t __pgd(unsigned long long val)
796 return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
799 static inline unsigned long long pte_val(pte_t x)
801 return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
804 static inline unsigned long long pmd_val(pmd_t x)
806 return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
809 static inline unsigned long long pgd_val(pgd_t x)
811 return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
814 static inline void set_pte(pte_t *ptep, pte_t pteval)
816 PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
819 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
820 pte_t *ptep, pte_t pteval)
823 paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
826 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
828 PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
831 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
832 pte_t *ptep, pte_t pte)
835 paravirt_ops.set_pte_present(mm, addr, ptep, pte);
838 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
840 PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
843 static inline void set_pud(pud_t *pudp, pud_t pudval)
845 PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
848 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
850 PVOP_VCALL3(pte_clear, mm, addr, ptep);
853 static inline void pmd_clear(pmd_t *pmdp)
855 PVOP_VCALL1(pmd_clear, pmdp);
858 #else /* !CONFIG_X86_PAE */
860 static inline pte_t __pte(unsigned long val)
862 return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
865 static inline pgd_t __pgd(unsigned long val)
867 return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
870 static inline unsigned long pte_val(pte_t x)
872 return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
875 static inline unsigned long pgd_val(pgd_t x)
877 return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
880 static inline void set_pte(pte_t *ptep, pte_t pteval)
882 PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
885 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
886 pte_t *ptep, pte_t pteval)
888 PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
891 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
893 PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
895 #endif /* CONFIG_X86_PAE */
897 #define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
898 static inline void arch_enter_lazy_cpu_mode(void)
900 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
903 static inline void arch_leave_lazy_cpu_mode(void)
905 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
908 static inline void arch_flush_lazy_cpu_mode(void)
910 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
914 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
915 static inline void arch_enter_lazy_mmu_mode(void)
917 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
920 static inline void arch_leave_lazy_mmu_mode(void)
922 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
925 static inline void arch_flush_lazy_mmu_mode(void)
927 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
930 void _paravirt_nop(void);
931 #define paravirt_nop ((void *)_paravirt_nop)
933 /* These all sit in the .parainstructions section to tell us what to patch. */
934 struct paravirt_patch_site {
935 u8 *instr; /* original instructions */
936 u8 instrtype; /* type of this instruction */
937 u8 len; /* length of original instruction */
938 u16 clobbers; /* what registers you may clobber */
941 extern struct paravirt_patch_site __parainstructions[],
942 __parainstructions_end[];
944 static inline unsigned long __raw_local_save_flags(void)
948 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
950 "popl %%edx; popl %%ecx")
952 : paravirt_type(save_fl),
953 paravirt_clobber(CLBR_EAX)
958 static inline void raw_local_irq_restore(unsigned long f)
960 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
962 "popl %%edx; popl %%ecx")
965 paravirt_type(restore_fl),
966 paravirt_clobber(CLBR_EAX)
970 static inline void raw_local_irq_disable(void)
972 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
974 "popl %%edx; popl %%ecx")
976 : paravirt_type(irq_disable),
977 paravirt_clobber(CLBR_EAX)
978 : "memory", "eax", "cc");
981 static inline void raw_local_irq_enable(void)
983 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
985 "popl %%edx; popl %%ecx")
987 : paravirt_type(irq_enable),
988 paravirt_clobber(CLBR_EAX)
989 : "memory", "eax", "cc");
992 static inline unsigned long __raw_local_irq_save(void)
996 f = __raw_local_save_flags();
997 raw_local_irq_disable();
1001 #define CLI_STRING \
1002 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1003 "call *paravirt_ops+%c[paravirt_cli_type]*4;" \
1004 "popl %%edx; popl %%ecx", \
1005 "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1007 #define STI_STRING \
1008 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1009 "call *paravirt_ops+%c[paravirt_sti_type]*4;" \
1010 "popl %%edx; popl %%ecx", \
1011 "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1013 #define CLI_STI_CLOBBERS , "%eax"
1014 #define CLI_STI_INPUT_ARGS \
1016 [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)), \
1017 [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)), \
1018 paravirt_clobber(CLBR_EAX)
1020 /* Make sure as little as possible of this mess escapes. */
1021 #undef PARAVIRT_CALL
1035 #else /* __ASSEMBLY__ */
1037 #define PARA_PATCH(off) ((off) / 4)
1039 #define PARA_SITE(ptype, clobbers, ops) \
1043 .pushsection .parainstructions,"a"; \
1050 #define INTERRUPT_RETURN \
1051 PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE, \
1052 jmp *%cs:paravirt_ops+PARAVIRT_iret)
1054 #define DISABLE_INTERRUPTS(clobbers) \
1055 PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers, \
1056 pushl %eax; pushl %ecx; pushl %edx; \
1057 call *%cs:paravirt_ops+PARAVIRT_irq_disable; \
1058 popl %edx; popl %ecx; popl %eax) \
1060 #define ENABLE_INTERRUPTS(clobbers) \
1061 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers, \
1062 pushl %eax; pushl %ecx; pushl %edx; \
1063 call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
1064 popl %edx; popl %ecx; popl %eax)
1066 #define ENABLE_INTERRUPTS_SYSEXIT \
1067 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE, \
1068 jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1070 #define GET_CR0_INTO_EAX \
1071 push %ecx; push %edx; \
1072 call *paravirt_ops+PARAVIRT_read_cr0; \
1075 #endif /* __ASSEMBLY__ */
1076 #endif /* CONFIG_PARAVIRT */
1077 #endif /* __ASM_PARAVIRT_H */