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 (*init_IRQ)(void);
56 void (*time_init)(void);
59 * Called before/after init_mm pagetable setup. setup_start
60 * may reset %cr3, and may pre-install parts of the pagetable;
61 * pagetable setup is expected to preserve any existing
64 void (*pagetable_setup_start)(pgd_t *pgd_base);
65 void (*pagetable_setup_done)(pgd_t *pgd_base);
67 /* Print a banner to identify the environment */
70 /* Set and set time of day */
71 unsigned long (*get_wallclock)(void);
72 int (*set_wallclock)(unsigned long);
74 /* cpuid emulation, mostly so that caps bits can be disabled */
75 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
76 unsigned int *ecx, unsigned int *edx);
78 /* hooks for various privileged instructions */
79 unsigned long (*get_debugreg)(int regno);
80 void (*set_debugreg)(int regno, unsigned long value);
84 unsigned long (*read_cr0)(void);
85 void (*write_cr0)(unsigned long);
87 unsigned long (*read_cr2)(void);
88 void (*write_cr2)(unsigned long);
90 unsigned long (*read_cr3)(void);
91 void (*write_cr3)(unsigned long);
93 unsigned long (*read_cr4_safe)(void);
94 unsigned long (*read_cr4)(void);
95 void (*write_cr4)(unsigned long);
98 * Get/set interrupt state. save_fl and restore_fl are only
99 * expected to use X86_EFLAGS_IF; all other bits
100 * returned from save_fl are undefined, and may be ignored by
103 unsigned long (*save_fl)(void);
104 void (*restore_fl)(unsigned long);
105 void (*irq_disable)(void);
106 void (*irq_enable)(void);
107 void (*safe_halt)(void);
110 void (*wbinvd)(void);
112 /* MSR, PMC and TSR operations.
113 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
114 u64 (*read_msr)(unsigned int msr, int *err);
115 int (*write_msr)(unsigned int msr, u64 val);
117 u64 (*read_tsc)(void);
118 u64 (*read_pmc)(void);
119 u64 (*get_scheduled_cycles)(void);
120 unsigned long (*get_cpu_khz)(void);
122 /* Segment descriptor handling */
123 void (*load_tr_desc)(void);
124 void (*load_gdt)(const struct Xgt_desc_struct *);
125 void (*load_idt)(const struct Xgt_desc_struct *);
126 void (*store_gdt)(struct Xgt_desc_struct *);
127 void (*store_idt)(struct Xgt_desc_struct *);
128 void (*set_ldt)(const void *desc, unsigned entries);
129 unsigned long (*store_tr)(void);
130 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
131 void (*write_ldt_entry)(struct desc_struct *,
132 int entrynum, u32 low, u32 high);
133 void (*write_gdt_entry)(struct desc_struct *,
134 int entrynum, u32 low, u32 high);
135 void (*write_idt_entry)(struct desc_struct *,
136 int entrynum, u32 low, u32 high);
137 void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
139 void (*set_iopl_mask)(unsigned mask);
140 void (*io_delay)(void);
143 * Hooks for intercepting the creation/use/destruction of an
146 void (*activate_mm)(struct mm_struct *prev,
147 struct mm_struct *next);
148 void (*dup_mmap)(struct mm_struct *oldmm,
149 struct mm_struct *mm);
150 void (*exit_mmap)(struct mm_struct *mm);
152 #ifdef CONFIG_X86_LOCAL_APIC
154 * Direct APIC operations, principally for VMI. Ideally
155 * these shouldn't be in this interface.
157 void (*apic_write)(unsigned long reg, unsigned long v);
158 void (*apic_write_atomic)(unsigned long reg, unsigned long v);
159 unsigned long (*apic_read)(unsigned long reg);
160 void (*setup_boot_clock)(void);
161 void (*setup_secondary_clock)(void);
163 void (*startup_ipi_hook)(int phys_apicid,
164 unsigned long start_eip,
165 unsigned long start_esp);
169 void (*flush_tlb_user)(void);
170 void (*flush_tlb_kernel)(void);
171 void (*flush_tlb_single)(unsigned long addr);
172 void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
175 /* Hooks for allocating/releasing pagetable pages */
176 void (*alloc_pt)(u32 pfn);
177 void (*alloc_pd)(u32 pfn);
178 void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
179 void (*release_pt)(u32 pfn);
180 void (*release_pd)(u32 pfn);
182 /* Pagetable manipulation functions */
183 void (*set_pte)(pte_t *ptep, pte_t pteval);
184 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
185 pte_t *ptep, pte_t pteval);
186 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
187 void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
188 void (*pte_update_defer)(struct mm_struct *mm,
189 unsigned long addr, pte_t *ptep);
191 pte_t (*ptep_get_and_clear)(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 /* Mark a paravirt probe function. */
228 #define paravirt_probe(fn) \
229 static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
230 __attribute__((__section__(".paravirtprobe"))) = fn
232 extern struct paravirt_ops paravirt_ops;
234 #define PARAVIRT_PATCH(x) \
235 (offsetof(struct paravirt_ops, x) / sizeof(void *))
237 #define paravirt_type(type) \
238 [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
239 #define paravirt_clobber(clobber) \
240 [paravirt_clobber] "i" (clobber)
243 * Generate some code, and mark it as patchable by the
244 * apply_paravirt() alternate instruction patcher.
246 #define _paravirt_alt(insn_string, type, clobber) \
247 "771:\n\t" insn_string "\n" "772:\n" \
248 ".pushsection .parainstructions,\"a\"\n" \
250 " .byte " type "\n" \
251 " .byte 772b-771b\n" \
252 " .short " clobber "\n" \
255 /* Generate patchable code, with the default asm parameters. */
256 #define paravirt_alt(insn_string) \
257 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
259 unsigned paravirt_patch_nop(void);
260 unsigned paravirt_patch_ignore(unsigned len);
261 unsigned paravirt_patch_call(void *target, u16 tgt_clobbers,
262 void *site, u16 site_clobbers,
264 unsigned paravirt_patch_jmp(void *target, void *site, unsigned len);
265 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *site, unsigned len);
267 unsigned paravirt_patch_insns(void *site, unsigned len,
268 const char *start, const char *end);
272 * This generates an indirect call based on the operation type number.
273 * The type number, computed in PARAVIRT_PATCH, is derived from the
274 * offset into the paravirt_ops structure, and can therefore be freely
275 * converted back into a structure offset.
277 #define PARAVIRT_CALL "call *(paravirt_ops+%c[paravirt_typenum]*4);"
280 * These macros are intended to wrap calls into a paravirt_ops
281 * operation, so that they can be later identified and patched at
284 * Normally, a call to a pv_op function is a simple indirect call:
285 * (paravirt_ops.operations)(args...).
287 * Unfortunately, this is a relatively slow operation for modern CPUs,
288 * because it cannot necessarily determine what the destination
289 * address is. In this case, the address is a runtime constant, so at
290 * the very least we can patch the call to e a simple direct call, or
291 * ideally, patch an inline implementation into the callsite. (Direct
292 * calls are essentially free, because the call and return addresses
293 * are completely predictable.)
295 * These macros rely on the standard gcc "regparm(3)" calling
296 * convention, in which the first three arguments are placed in %eax,
297 * %edx, %ecx (in that order), and the remaining arguments are placed
298 * on the stack. All caller-save registers (eax,edx,ecx) are expected
299 * to be modified (either clobbered or used for return values).
301 * The call instruction itself is marked by placing its start address
302 * and size into the .parainstructions section, so that
303 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
304 * appropriate patching under the control of the backend paravirt_ops
307 * Unfortunately there's no way to get gcc to generate the args setup
308 * for the call, and then allow the call itself to be generated by an
309 * inline asm. Because of this, we must do the complete arg setup and
310 * return value handling from within these macros. This is fairly
313 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
314 * It could be extended to more arguments, but there would be little
315 * to be gained from that. For each number of arguments, there are
316 * the two VCALL and CALL variants for void and non-void functions.
318 * When there is a return value, the invoker of the macro must specify
319 * the return type. The macro then uses sizeof() on that type to
320 * determine whether its a 32 or 64 bit value, and places the return
321 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
324 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
327 * Small structures are passed and returned in registers. The macro
328 * calling convention can't directly deal with this, so the wrapper
329 * functions must do this.
331 * These PVOP_* macros are only defined within this header. This
332 * means that all uses must be wrapped in inline functions. This also
333 * makes sure the incoming and outgoing types are always correct.
335 #define __PVOP_CALL(rettype, op, pre, post, ...) \
338 unsigned long __eax, __edx, __ecx; \
339 if (sizeof(rettype) > sizeof(unsigned long)) { \
341 paravirt_alt(PARAVIRT_CALL) \
343 : "=a" (__eax), "=d" (__edx), \
345 : paravirt_type(op), \
346 paravirt_clobber(CLBR_ANY), \
349 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
352 paravirt_alt(PARAVIRT_CALL) \
354 : "=a" (__eax), "=d" (__edx), \
356 : paravirt_type(op), \
357 paravirt_clobber(CLBR_ANY), \
360 __ret = (rettype)__eax; \
364 #define __PVOP_VCALL(op, pre, post, ...) \
366 unsigned long __eax, __edx, __ecx; \
368 paravirt_alt(PARAVIRT_CALL) \
370 : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
371 : paravirt_type(op), \
372 paravirt_clobber(CLBR_ANY), \
377 #define PVOP_CALL0(rettype, op) \
378 __PVOP_CALL(rettype, op, "", "")
379 #define PVOP_VCALL0(op) \
380 __PVOP_VCALL(op, "", "")
382 #define PVOP_CALL1(rettype, op, arg1) \
383 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)))
384 #define PVOP_VCALL1(op, arg1) \
385 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)))
387 #define PVOP_CALL2(rettype, op, arg1, arg2) \
388 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
389 #define PVOP_VCALL2(op, arg1, arg2) \
390 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
392 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
393 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), \
394 "1"((u32)(arg2)), "2"((u32)(arg3)))
395 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
396 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1"((u32)(arg2)), \
399 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
400 __PVOP_CALL(rettype, op, \
401 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
402 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
403 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
404 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
406 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
407 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
408 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
410 static inline int paravirt_enabled(void)
412 return paravirt_ops.paravirt_enabled;
415 static inline void load_esp0(struct tss_struct *tss,
416 struct thread_struct *thread)
418 PVOP_VCALL2(load_esp0, tss, thread);
421 #define ARCH_SETUP paravirt_ops.arch_setup();
422 static inline unsigned long get_wallclock(void)
424 return PVOP_CALL0(unsigned long, get_wallclock);
427 static inline int set_wallclock(unsigned long nowtime)
429 return PVOP_CALL1(int, set_wallclock, nowtime);
432 static inline void (*choose_time_init(void))(void)
434 return paravirt_ops.time_init;
437 /* The paravirtualized CPUID instruction. */
438 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
439 unsigned int *ecx, unsigned int *edx)
441 PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
445 * These special macros can be used to get or set a debugging register
447 static inline unsigned long paravirt_get_debugreg(int reg)
449 return PVOP_CALL1(unsigned long, get_debugreg, reg);
451 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
452 static inline void set_debugreg(unsigned long val, int reg)
454 PVOP_VCALL2(set_debugreg, reg, val);
457 static inline void clts(void)
462 static inline unsigned long read_cr0(void)
464 return PVOP_CALL0(unsigned long, read_cr0);
467 static inline void write_cr0(unsigned long x)
469 PVOP_VCALL1(write_cr0, x);
472 static inline unsigned long read_cr2(void)
474 return PVOP_CALL0(unsigned long, read_cr2);
477 static inline void write_cr2(unsigned long x)
479 PVOP_VCALL1(write_cr2, x);
482 static inline unsigned long read_cr3(void)
484 return PVOP_CALL0(unsigned long, read_cr3);
487 static inline void write_cr3(unsigned long x)
489 PVOP_VCALL1(write_cr3, x);
492 static inline unsigned long read_cr4(void)
494 return PVOP_CALL0(unsigned long, read_cr4);
496 static inline unsigned long read_cr4_safe(void)
498 return PVOP_CALL0(unsigned long, read_cr4_safe);
501 static inline void write_cr4(unsigned long x)
503 PVOP_VCALL1(write_cr4, x);
506 static inline void raw_safe_halt(void)
508 PVOP_VCALL0(safe_halt);
511 static inline void halt(void)
513 PVOP_VCALL0(safe_halt);
516 static inline void wbinvd(void)
521 #define get_kernel_rpl() (paravirt_ops.kernel_rpl)
523 static inline u64 paravirt_read_msr(unsigned msr, int *err)
525 return PVOP_CALL2(u64, read_msr, msr, err);
527 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
529 return PVOP_CALL3(int, write_msr, msr, low, high);
532 /* These should all do BUG_ON(_err), but our headers are too tangled. */
533 #define rdmsr(msr,val1,val2) do { \
535 u64 _l = paravirt_read_msr(msr, &_err); \
540 #define wrmsr(msr,val1,val2) do { \
541 paravirt_write_msr(msr, val1, val2); \
544 #define rdmsrl(msr,val) do { \
546 val = paravirt_read_msr(msr, &_err); \
549 #define wrmsrl(msr,val) ((void)paravirt_write_msr(msr, val, 0))
550 #define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
552 /* rdmsr with exception handling */
553 #define rdmsr_safe(msr,a,b) ({ \
555 u64 _l = paravirt_read_msr(msr, &_err); \
561 static inline u64 paravirt_read_tsc(void)
563 return PVOP_CALL0(u64, read_tsc);
565 #define rdtsc(low,high) do { \
566 u64 _l = paravirt_read_tsc(); \
571 #define rdtscl(low) do { \
572 u64 _l = paravirt_read_tsc(); \
576 #define rdtscll(val) (val = paravirt_read_tsc())
578 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
579 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
581 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
583 static inline unsigned long long paravirt_read_pmc(int counter)
585 return PVOP_CALL1(u64, read_pmc, counter);
588 #define rdpmc(counter,low,high) do { \
589 u64 _l = paravirt_read_pmc(counter); \
594 static inline void load_TR_desc(void)
596 PVOP_VCALL0(load_tr_desc);
598 static inline void load_gdt(const struct Xgt_desc_struct *dtr)
600 PVOP_VCALL1(load_gdt, dtr);
602 static inline void load_idt(const struct Xgt_desc_struct *dtr)
604 PVOP_VCALL1(load_idt, dtr);
606 static inline void set_ldt(const void *addr, unsigned entries)
608 PVOP_VCALL2(set_ldt, addr, entries);
610 static inline void store_gdt(struct Xgt_desc_struct *dtr)
612 PVOP_VCALL1(store_gdt, dtr);
614 static inline void store_idt(struct Xgt_desc_struct *dtr)
616 PVOP_VCALL1(store_idt, dtr);
618 static inline unsigned long paravirt_store_tr(void)
620 return PVOP_CALL0(unsigned long, store_tr);
622 #define store_tr(tr) ((tr) = paravirt_store_tr())
623 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
625 PVOP_VCALL2(load_tls, t, cpu);
627 static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
629 PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
631 static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
633 PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
635 static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
637 PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
639 static inline void set_iopl_mask(unsigned mask)
641 PVOP_VCALL1(set_iopl_mask, mask);
644 /* The paravirtualized I/O functions */
645 static inline void slow_down_io(void) {
646 paravirt_ops.io_delay();
647 #ifdef REALLY_SLOW_IO
648 paravirt_ops.io_delay();
649 paravirt_ops.io_delay();
650 paravirt_ops.io_delay();
654 #ifdef CONFIG_X86_LOCAL_APIC
656 * Basic functions accessing APICs.
658 static inline void apic_write(unsigned long reg, unsigned long v)
660 PVOP_VCALL2(apic_write, reg, v);
663 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
665 PVOP_VCALL2(apic_write_atomic, reg, v);
668 static inline unsigned long apic_read(unsigned long reg)
670 return PVOP_CALL1(unsigned long, apic_read, reg);
673 static inline void setup_boot_clock(void)
675 PVOP_VCALL0(setup_boot_clock);
678 static inline void setup_secondary_clock(void)
680 PVOP_VCALL0(setup_secondary_clock);
684 static inline void paravirt_pagetable_setup_start(pgd_t *base)
686 if (paravirt_ops.pagetable_setup_start)
687 (*paravirt_ops.pagetable_setup_start)(base);
690 static inline void paravirt_pagetable_setup_done(pgd_t *base)
692 if (paravirt_ops.pagetable_setup_done)
693 (*paravirt_ops.pagetable_setup_done)(base);
697 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
698 unsigned long start_esp)
700 PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
704 static inline void paravirt_activate_mm(struct mm_struct *prev,
705 struct mm_struct *next)
707 PVOP_VCALL2(activate_mm, prev, next);
710 static inline void arch_dup_mmap(struct mm_struct *oldmm,
711 struct mm_struct *mm)
713 PVOP_VCALL2(dup_mmap, oldmm, mm);
716 static inline void arch_exit_mmap(struct mm_struct *mm)
718 PVOP_VCALL1(exit_mmap, mm);
721 static inline void __flush_tlb(void)
723 PVOP_VCALL0(flush_tlb_user);
725 static inline void __flush_tlb_global(void)
727 PVOP_VCALL0(flush_tlb_kernel);
729 static inline void __flush_tlb_single(unsigned long addr)
731 PVOP_VCALL1(flush_tlb_single, addr);
734 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
737 PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
740 static inline void paravirt_alloc_pt(unsigned pfn)
742 PVOP_VCALL1(alloc_pt, pfn);
744 static inline void paravirt_release_pt(unsigned pfn)
746 PVOP_VCALL1(release_pt, pfn);
749 static inline void paravirt_alloc_pd(unsigned pfn)
751 PVOP_VCALL1(alloc_pd, pfn);
754 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
755 unsigned start, unsigned count)
757 PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
759 static inline void paravirt_release_pd(unsigned pfn)
761 PVOP_VCALL1(release_pd, pfn);
764 #ifdef CONFIG_HIGHPTE
765 static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
768 ret = PVOP_CALL2(unsigned long, kmap_atomic_pte, page, type);
773 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
776 PVOP_VCALL3(pte_update, mm, addr, ptep);
779 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
782 PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
785 #ifdef CONFIG_X86_PAE
786 static inline pte_t __pte(unsigned long long val)
788 unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
790 return (pte_t) { ret, ret >> 32 };
793 static inline pmd_t __pmd(unsigned long long val)
795 return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
798 static inline pgd_t __pgd(unsigned long long val)
800 return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
803 static inline unsigned long long pte_val(pte_t x)
805 return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
808 static inline unsigned long long pmd_val(pmd_t x)
810 return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
813 static inline unsigned long long pgd_val(pgd_t x)
815 return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
818 static inline void set_pte(pte_t *ptep, pte_t pteval)
820 PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
823 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
824 pte_t *ptep, pte_t pteval)
827 paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
830 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
832 PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
835 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
836 pte_t *ptep, pte_t pte)
839 paravirt_ops.set_pte_present(mm, addr, ptep, pte);
842 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
844 PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
847 static inline void set_pud(pud_t *pudp, pud_t pudval)
849 PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
852 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
854 PVOP_VCALL3(pte_clear, mm, addr, ptep);
857 static inline void pmd_clear(pmd_t *pmdp)
859 PVOP_VCALL1(pmd_clear, pmdp);
862 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
864 unsigned long long val = PVOP_CALL1(unsigned long long, ptep_get_and_clear, p);
865 return (pte_t) { val, val >> 32 };
867 #else /* !CONFIG_X86_PAE */
868 static inline pte_t __pte(unsigned long val)
870 return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
873 static inline pgd_t __pgd(unsigned long val)
875 return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
878 static inline unsigned long pte_val(pte_t x)
880 return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
883 static inline unsigned long pgd_val(pgd_t x)
885 return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
888 static inline void set_pte(pte_t *ptep, pte_t pteval)
890 PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
893 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
894 pte_t *ptep, pte_t pteval)
896 PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
899 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
901 PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
904 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
906 return (pte_t) { PVOP_CALL1(unsigned long, ptep_get_and_clear, p) };
908 #endif /* CONFIG_X86_PAE */
910 #define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
911 static inline void arch_enter_lazy_cpu_mode(void)
913 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
916 static inline void arch_leave_lazy_cpu_mode(void)
918 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
921 static inline void arch_flush_lazy_cpu_mode(void)
923 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
927 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
928 static inline void arch_enter_lazy_mmu_mode(void)
930 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
933 static inline void arch_leave_lazy_mmu_mode(void)
935 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
938 static inline void arch_flush_lazy_mmu_mode(void)
940 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
943 void _paravirt_nop(void);
944 #define paravirt_nop ((void *)_paravirt_nop)
946 /* These all sit in the .parainstructions section to tell us what to patch. */
947 struct paravirt_patch_site {
948 u8 *instr; /* original instructions */
949 u8 instrtype; /* type of this instruction */
950 u8 len; /* length of original instruction */
951 u16 clobbers; /* what registers you may clobber */
954 extern struct paravirt_patch_site __parainstructions[],
955 __parainstructions_end[];
957 static inline unsigned long __raw_local_save_flags(void)
961 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
963 "popl %%edx; popl %%ecx")
965 : paravirt_type(save_fl),
966 paravirt_clobber(CLBR_EAX)
971 static inline void raw_local_irq_restore(unsigned long f)
973 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
975 "popl %%edx; popl %%ecx")
978 paravirt_type(restore_fl),
979 paravirt_clobber(CLBR_EAX)
983 static inline void raw_local_irq_disable(void)
985 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
987 "popl %%edx; popl %%ecx")
989 : paravirt_type(irq_disable),
990 paravirt_clobber(CLBR_EAX)
991 : "memory", "eax", "cc");
994 static inline void raw_local_irq_enable(void)
996 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
998 "popl %%edx; popl %%ecx")
1000 : paravirt_type(irq_enable),
1001 paravirt_clobber(CLBR_EAX)
1002 : "memory", "eax", "cc");
1005 static inline unsigned long __raw_local_irq_save(void)
1009 f = __raw_local_save_flags();
1010 raw_local_irq_disable();
1014 #define CLI_STRING \
1015 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1016 "call *paravirt_ops+%c[paravirt_cli_type]*4;" \
1017 "popl %%edx; popl %%ecx", \
1018 "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1020 #define STI_STRING \
1021 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1022 "call *paravirt_ops+%c[paravirt_sti_type]*4;" \
1023 "popl %%edx; popl %%ecx", \
1024 "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1026 #define CLI_STI_CLOBBERS , "%eax"
1027 #define CLI_STI_INPUT_ARGS \
1029 [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)), \
1030 [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)), \
1031 paravirt_clobber(CLBR_EAX)
1033 /* Make sure as little as possible of this mess escapes. */
1034 #undef PARAVIRT_CALL
1048 #else /* __ASSEMBLY__ */
1050 #define PARA_PATCH(off) ((off) / 4)
1052 #define PARA_SITE(ptype, clobbers, ops) \
1056 .pushsection .parainstructions,"a"; \
1063 #define INTERRUPT_RETURN \
1064 PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE, \
1065 jmp *%cs:paravirt_ops+PARAVIRT_iret)
1067 #define DISABLE_INTERRUPTS(clobbers) \
1068 PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers, \
1069 pushl %eax; pushl %ecx; pushl %edx; \
1070 call *%cs:paravirt_ops+PARAVIRT_irq_disable; \
1071 popl %edx; popl %ecx; popl %eax) \
1073 #define ENABLE_INTERRUPTS(clobbers) \
1074 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers, \
1075 pushl %eax; pushl %ecx; pushl %edx; \
1076 call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
1077 popl %edx; popl %ecx; popl %eax)
1079 #define ENABLE_INTERRUPTS_SYSEXIT \
1080 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE, \
1081 jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1083 #define GET_CR0_INTO_EAX \
1084 push %ecx; push %edx; \
1085 call *paravirt_ops+PARAVIRT_read_cr0; \
1088 #endif /* __ASSEMBLY__ */
1089 #endif /* CONFIG_PARAVIRT */
1090 #endif /* __ASM_PARAVIRT_H */