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-rw-r--r--include/asm-i386/paravirt.h1085
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diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h
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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. */
5
6#ifdef CONFIG_PARAVIRT
7#include <asm/page.h>
8
9/* Bitmask of what can be clobbered: usually at least eax. */
10#define CLBR_NONE 0x0
11#define CLBR_EAX 0x1
12#define CLBR_ECX 0x2
13#define CLBR_EDX 0x4
14#define CLBR_ANY 0x7
15
16#ifndef __ASSEMBLY__
17#include <linux/types.h>
18#include <linux/cpumask.h>
19#include <asm/kmap_types.h>
20
21struct page;
22struct thread_struct;
23struct Xgt_desc_struct;
24struct tss_struct;
25struct mm_struct;
26struct desc_struct;
27
28/* Lazy mode for batching updates / context switch */
29enum paravirt_lazy_mode {
30 PARAVIRT_LAZY_NONE = 0,
31 PARAVIRT_LAZY_MMU = 1,
32 PARAVIRT_LAZY_CPU = 2,
33 PARAVIRT_LAZY_FLUSH = 3,
34};
35
36struct paravirt_ops
37{
38 unsigned int kernel_rpl;
39 int shared_kernel_pmd;
40 int paravirt_enabled;
41 const char *name;
42
43 /*
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.
49 */
50 unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
51 unsigned long addr, unsigned len);
52
53 /* Basic arch-specific setup */
54 void (*arch_setup)(void);
55 char *(*memory_setup)(void);
56 void (*post_allocator_init)(void);
57
58 void (*init_IRQ)(void);
59 void (*time_init)(void);
60
61 /*
62 * Called before/after init_mm pagetable setup. setup_start
63 * may reset %cr3, and may pre-install parts of the pagetable;
64 * pagetable setup is expected to preserve any existing
65 * mapping.
66 */
67 void (*pagetable_setup_start)(pgd_t *pgd_base);
68 void (*pagetable_setup_done)(pgd_t *pgd_base);
69
70 /* Print a banner to identify the environment */
71 void (*banner)(void);
72
73 /* Set and set time of day */
74 unsigned long (*get_wallclock)(void);
75 int (*set_wallclock)(unsigned long);
76
77 /* cpuid emulation, mostly so that caps bits can be disabled */
78 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
79 unsigned int *ecx, unsigned int *edx);
80
81 /* hooks for various privileged instructions */
82 unsigned long (*get_debugreg)(int regno);
83 void (*set_debugreg)(int regno, unsigned long value);
84
85 void (*clts)(void);
86
87 unsigned long (*read_cr0)(void);
88 void (*write_cr0)(unsigned long);
89
90 unsigned long (*read_cr2)(void);
91 void (*write_cr2)(unsigned long);
92
93 unsigned long (*read_cr3)(void);
94 void (*write_cr3)(unsigned long);
95
96 unsigned long (*read_cr4_safe)(void);
97 unsigned long (*read_cr4)(void);
98 void (*write_cr4)(unsigned long);
99
100 /*
101 * Get/set interrupt state. save_fl and restore_fl are only
102 * expected to use X86_EFLAGS_IF; all other bits
103 * returned from save_fl are undefined, and may be ignored by
104 * restore_fl.
105 */
106 unsigned long (*save_fl)(void);
107 void (*restore_fl)(unsigned long);
108 void (*irq_disable)(void);
109 void (*irq_enable)(void);
110 void (*safe_halt)(void);
111 void (*halt)(void);
112
113 void (*wbinvd)(void);
114
115 /* MSR, PMC and TSR operations.
116 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
117 u64 (*read_msr)(unsigned int msr, int *err);
118 int (*write_msr)(unsigned int msr, u64 val);
119
120 u64 (*read_tsc)(void);
121 u64 (*read_pmc)(void);
122 unsigned long long (*sched_clock)(void);
123 unsigned long (*get_cpu_khz)(void);
124
125 /* Segment descriptor handling */
126 void (*load_tr_desc)(void);
127 void (*load_gdt)(const struct Xgt_desc_struct *);
128 void (*load_idt)(const struct Xgt_desc_struct *);
129 void (*store_gdt)(struct Xgt_desc_struct *);
130 void (*store_idt)(struct Xgt_desc_struct *);
131 void (*set_ldt)(const void *desc, unsigned entries);
132 unsigned long (*store_tr)(void);
133 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
134 void (*write_ldt_entry)(struct desc_struct *,
135 int entrynum, u32 low, u32 high);
136 void (*write_gdt_entry)(struct desc_struct *,
137 int entrynum, u32 low, u32 high);
138 void (*write_idt_entry)(struct desc_struct *,
139 int entrynum, u32 low, u32 high);
140 void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
141
142 void (*set_iopl_mask)(unsigned mask);
143 void (*io_delay)(void);
144
145 /*
146 * Hooks for intercepting the creation/use/destruction of an
147 * mm_struct.
148 */
149 void (*activate_mm)(struct mm_struct *prev,
150 struct mm_struct *next);
151 void (*dup_mmap)(struct mm_struct *oldmm,
152 struct mm_struct *mm);
153 void (*exit_mmap)(struct mm_struct *mm);
154
155#ifdef CONFIG_X86_LOCAL_APIC
156 /*
157 * Direct APIC operations, principally for VMI. Ideally
158 * these shouldn't be in this interface.
159 */
160 void (*apic_write)(unsigned long reg, unsigned long v);
161 void (*apic_write_atomic)(unsigned long reg, unsigned long v);
162 unsigned long (*apic_read)(unsigned long reg);
163 void (*setup_boot_clock)(void);
164 void (*setup_secondary_clock)(void);
165
166 void (*startup_ipi_hook)(int phys_apicid,
167 unsigned long start_eip,
168 unsigned long start_esp);
169#endif
170
171 /* TLB operations */
172 void (*flush_tlb_user)(void);
173 void (*flush_tlb_kernel)(void);
174 void (*flush_tlb_single)(unsigned long addr);
175 void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
176 unsigned long va);
177
178 /* Hooks for allocating/releasing pagetable pages */
179 void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
180 void (*alloc_pd)(u32 pfn);
181 void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
182 void (*release_pt)(u32 pfn);
183 void (*release_pd)(u32 pfn);
184
185 /* Pagetable manipulation functions */
186 void (*set_pte)(pte_t *ptep, pte_t pteval);
187 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
188 pte_t *ptep, pte_t pteval);
189 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
190 void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
191 void (*pte_update_defer)(struct mm_struct *mm,
192 unsigned long addr, pte_t *ptep);
193
194#ifdef CONFIG_HIGHPTE
195 void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
196#endif
197
198#ifdef CONFIG_X86_PAE
199 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
200 void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
201 void (*set_pud)(pud_t *pudp, pud_t pudval);
202 void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
203 void (*pmd_clear)(pmd_t *pmdp);
204
205 unsigned long long (*pte_val)(pte_t);
206 unsigned long long (*pmd_val)(pmd_t);
207 unsigned long long (*pgd_val)(pgd_t);
208
209 pte_t (*make_pte)(unsigned long long pte);
210 pmd_t (*make_pmd)(unsigned long long pmd);
211 pgd_t (*make_pgd)(unsigned long long pgd);
212#else
213 unsigned long (*pte_val)(pte_t);
214 unsigned long (*pgd_val)(pgd_t);
215
216 pte_t (*make_pte)(unsigned long pte);
217 pgd_t (*make_pgd)(unsigned long pgd);
218#endif
219
220 /* Set deferred update mode, used for batching operations. */
221 void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
222
223 /* These two are jmp to, not actually called. */
224 void (*irq_enable_sysexit)(void);
225 void (*iret)(void);
226};
227
228extern struct paravirt_ops paravirt_ops;
229
230#define PARAVIRT_PATCH(x) \
231 (offsetof(struct paravirt_ops, x) / sizeof(void *))
232
233#define paravirt_type(type) \
234 [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
235#define paravirt_clobber(clobber) \
236 [paravirt_clobber] "i" (clobber)
237
238/*
239 * Generate some code, and mark it as patchable by the
240 * apply_paravirt() alternate instruction patcher.
241 */
242#define _paravirt_alt(insn_string, type, clobber) \
243 "771:\n\t" insn_string "\n" "772:\n" \
244 ".pushsection .parainstructions,\"a\"\n" \
245 " .long 771b\n" \
246 " .byte " type "\n" \
247 " .byte 772b-771b\n" \
248 " .short " clobber "\n" \
249 ".popsection\n"
250
251/* Generate patchable code, with the default asm parameters. */
252#define paravirt_alt(insn_string) \
253 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
254
255unsigned paravirt_patch_nop(void);
256unsigned paravirt_patch_ignore(unsigned len);
257unsigned paravirt_patch_call(void *insnbuf,
258 const void *target, u16 tgt_clobbers,
259 unsigned long addr, u16 site_clobbers,
260 unsigned len);
261unsigned paravirt_patch_jmp(const void *target, void *insnbuf,
262 unsigned long addr, unsigned len);
263unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
264 unsigned long addr, unsigned len);
265
266unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
267 const char *start, const char *end);
268
269int paravirt_disable_iospace(void);
270
271/*
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.
276 */
277#define PARAVIRT_CALL "call *(paravirt_ops+%c[paravirt_typenum]*4);"
278
279/*
280 * These macros are intended to wrap calls into a paravirt_ops
281 * operation, so that they can be later identified and patched at
282 * runtime.
283 *
284 * Normally, a call to a pv_op function is a simple indirect call:
285 * (paravirt_ops.operations)(args...).
286 *
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.)
294 *
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).
300 *
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
305 * implementation.
306 *
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
311 * cumbersome.
312 *
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.
317 *
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
322 * 64-bit).
323 *
324 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
325 * in low,high order.
326 *
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.
330 *
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.
334 */
335#define __PVOP_CALL(rettype, op, pre, post, ...) \
336 ({ \
337 rettype __ret; \
338 unsigned long __eax, __edx, __ecx; \
339 if (sizeof(rettype) > sizeof(unsigned long)) { \
340 asm volatile(pre \
341 paravirt_alt(PARAVIRT_CALL) \
342 post \
343 : "=a" (__eax), "=d" (__edx), \
344 "=c" (__ecx) \
345 : paravirt_type(op), \
346 paravirt_clobber(CLBR_ANY), \
347 ##__VA_ARGS__ \
348 : "memory", "cc"); \
349 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
350 } else { \
351 asm volatile(pre \
352 paravirt_alt(PARAVIRT_CALL) \
353 post \
354 : "=a" (__eax), "=d" (__edx), \
355 "=c" (__ecx) \
356 : paravirt_type(op), \
357 paravirt_clobber(CLBR_ANY), \
358 ##__VA_ARGS__ \
359 : "memory", "cc"); \
360 __ret = (rettype)__eax; \
361 } \
362 __ret; \
363 })
364#define __PVOP_VCALL(op, pre, post, ...) \
365 ({ \
366 unsigned long __eax, __edx, __ecx; \
367 asm volatile(pre \
368 paravirt_alt(PARAVIRT_CALL) \
369 post \
370 : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
371 : paravirt_type(op), \
372 paravirt_clobber(CLBR_ANY), \
373 ##__VA_ARGS__ \
374 : "memory", "cc"); \
375 })
376
377#define PVOP_CALL0(rettype, op) \
378 __PVOP_CALL(rettype, op, "", "")
379#define PVOP_VCALL0(op) \
380 __PVOP_VCALL(op, "", "")
381
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)))
386
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)))
391
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)), \
397 "2"((u32)(arg3)))
398
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) \
405 __PVOP_VCALL(op, \
406 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
407 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
408 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
409
410static inline int paravirt_enabled(void)
411{
412 return paravirt_ops.paravirt_enabled;
413}
414
415static inline void load_esp0(struct tss_struct *tss,
416 struct thread_struct *thread)
417{
418 PVOP_VCALL2(load_esp0, tss, thread);
419}
420
421#define ARCH_SETUP paravirt_ops.arch_setup();
422static inline unsigned long get_wallclock(void)
423{
424 return PVOP_CALL0(unsigned long, get_wallclock);
425}
426
427static inline int set_wallclock(unsigned long nowtime)
428{
429 return PVOP_CALL1(int, set_wallclock, nowtime);
430}
431
432static inline void (*choose_time_init(void))(void)
433{
434 return paravirt_ops.time_init;
435}
436
437/* The paravirtualized CPUID instruction. */
438static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
439 unsigned int *ecx, unsigned int *edx)
440{
441 PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
442}
443
444/*
445 * These special macros can be used to get or set a debugging register
446 */
447static inline unsigned long paravirt_get_debugreg(int reg)
448{
449 return PVOP_CALL1(unsigned long, get_debugreg, reg);
450}
451#define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
452static inline void set_debugreg(unsigned long val, int reg)
453{
454 PVOP_VCALL2(set_debugreg, reg, val);
455}
456
457static inline void clts(void)
458{
459 PVOP_VCALL0(clts);
460}
461
462static inline unsigned long read_cr0(void)
463{
464 return PVOP_CALL0(unsigned long, read_cr0);
465}
466
467static inline void write_cr0(unsigned long x)
468{
469 PVOP_VCALL1(write_cr0, x);
470}
471
472static inline unsigned long read_cr2(void)
473{
474 return PVOP_CALL0(unsigned long, read_cr2);
475}
476
477static inline void write_cr2(unsigned long x)
478{
479 PVOP_VCALL1(write_cr2, x);
480}
481
482static inline unsigned long read_cr3(void)
483{
484 return PVOP_CALL0(unsigned long, read_cr3);
485}
486
487static inline void write_cr3(unsigned long x)
488{
489 PVOP_VCALL1(write_cr3, x);
490}
491
492static inline unsigned long read_cr4(void)
493{
494 return PVOP_CALL0(unsigned long, read_cr4);
495}
496static inline unsigned long read_cr4_safe(void)
497{
498 return PVOP_CALL0(unsigned long, read_cr4_safe);
499}
500
501static inline void write_cr4(unsigned long x)
502{
503 PVOP_VCALL1(write_cr4, x);
504}
505
506static inline void raw_safe_halt(void)
507{
508 PVOP_VCALL0(safe_halt);
509}
510
511static inline void halt(void)
512{
513 PVOP_VCALL0(safe_halt);
514}
515
516static inline void wbinvd(void)
517{
518 PVOP_VCALL0(wbinvd);
519}
520
521#define get_kernel_rpl() (paravirt_ops.kernel_rpl)
522
523static inline u64 paravirt_read_msr(unsigned msr, int *err)
524{
525 return PVOP_CALL2(u64, read_msr, msr, err);
526}
527static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
528{
529 return PVOP_CALL3(int, write_msr, msr, low, high);
530}
531
532/* These should all do BUG_ON(_err), but our headers are too tangled. */
533#define rdmsr(msr,val1,val2) do { \
534 int _err; \
535 u64 _l = paravirt_read_msr(msr, &_err); \
536 val1 = (u32)_l; \
537 val2 = _l >> 32; \
538} while(0)
539
540#define wrmsr(msr,val1,val2) do { \
541 paravirt_write_msr(msr, val1, val2); \
542} while(0)
543
544#define rdmsrl(msr,val) do { \
545 int _err; \
546 val = paravirt_read_msr(msr, &_err); \
547} while(0)
548
549#define wrmsrl(msr,val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
550#define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
551
552/* rdmsr with exception handling */
553#define rdmsr_safe(msr,a,b) ({ \
554 int _err; \
555 u64 _l = paravirt_read_msr(msr, &_err); \
556 (*a) = (u32)_l; \
557 (*b) = _l >> 32; \
558 _err; })
559
560
561static inline u64 paravirt_read_tsc(void)
562{
563 return PVOP_CALL0(u64, read_tsc);
564}
565
566#define rdtscl(low) do { \
567 u64 _l = paravirt_read_tsc(); \
568 low = (int)_l; \
569} while(0)
570
571#define rdtscll(val) (val = paravirt_read_tsc())
572
573static inline unsigned long long paravirt_sched_clock(void)
574{
575 return PVOP_CALL0(unsigned long long, sched_clock);
576}
577#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
578
579#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
580
581static inline unsigned long long paravirt_read_pmc(int counter)
582{
583 return PVOP_CALL1(u64, read_pmc, counter);
584}
585
586#define rdpmc(counter,low,high) do { \
587 u64 _l = paravirt_read_pmc(counter); \
588 low = (u32)_l; \
589 high = _l >> 32; \
590} while(0)
591
592static inline void load_TR_desc(void)
593{
594 PVOP_VCALL0(load_tr_desc);
595}
596static inline void load_gdt(const struct Xgt_desc_struct *dtr)
597{
598 PVOP_VCALL1(load_gdt, dtr);
599}
600static inline void load_idt(const struct Xgt_desc_struct *dtr)
601{
602 PVOP_VCALL1(load_idt, dtr);
603}
604static inline void set_ldt(const void *addr, unsigned entries)
605{
606 PVOP_VCALL2(set_ldt, addr, entries);
607}
608static inline void store_gdt(struct Xgt_desc_struct *dtr)
609{
610 PVOP_VCALL1(store_gdt, dtr);
611}
612static inline void store_idt(struct Xgt_desc_struct *dtr)
613{
614 PVOP_VCALL1(store_idt, dtr);
615}
616static inline unsigned long paravirt_store_tr(void)
617{
618 return PVOP_CALL0(unsigned long, store_tr);
619}
620#define store_tr(tr) ((tr) = paravirt_store_tr())
621static inline void load_TLS(struct thread_struct *t, unsigned cpu)
622{
623 PVOP_VCALL2(load_tls, t, cpu);
624}
625static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
626{
627 PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
628}
629static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
630{
631 PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
632}
633static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
634{
635 PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
636}
637static inline void set_iopl_mask(unsigned mask)
638{
639 PVOP_VCALL1(set_iopl_mask, mask);
640}
641
642/* The paravirtualized I/O functions */
643static inline void slow_down_io(void) {
644 paravirt_ops.io_delay();
645#ifdef REALLY_SLOW_IO
646 paravirt_ops.io_delay();
647 paravirt_ops.io_delay();
648 paravirt_ops.io_delay();
649#endif
650}
651
652#ifdef CONFIG_X86_LOCAL_APIC
653/*
654 * Basic functions accessing APICs.
655 */
656static inline void apic_write(unsigned long reg, unsigned long v)
657{
658 PVOP_VCALL2(apic_write, reg, v);
659}
660
661static inline void apic_write_atomic(unsigned long reg, unsigned long v)
662{
663 PVOP_VCALL2(apic_write_atomic, reg, v);
664}
665
666static inline unsigned long apic_read(unsigned long reg)
667{
668 return PVOP_CALL1(unsigned long, apic_read, reg);
669}
670
671static inline void setup_boot_clock(void)
672{
673 PVOP_VCALL0(setup_boot_clock);
674}
675
676static inline void setup_secondary_clock(void)
677{
678 PVOP_VCALL0(setup_secondary_clock);
679}
680#endif
681
682static inline void paravirt_post_allocator_init(void)
683{
684 if (paravirt_ops.post_allocator_init)
685 (*paravirt_ops.post_allocator_init)();
686}
687
688static inline void paravirt_pagetable_setup_start(pgd_t *base)
689{
690 if (paravirt_ops.pagetable_setup_start)
691 (*paravirt_ops.pagetable_setup_start)(base);
692}
693
694static inline void paravirt_pagetable_setup_done(pgd_t *base)
695{
696 if (paravirt_ops.pagetable_setup_done)
697 (*paravirt_ops.pagetable_setup_done)(base);
698}
699
700#ifdef CONFIG_SMP
701static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
702 unsigned long start_esp)
703{
704 PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
705}
706#endif
707
708static inline void paravirt_activate_mm(struct mm_struct *prev,
709 struct mm_struct *next)
710{
711 PVOP_VCALL2(activate_mm, prev, next);
712}
713
714static inline void arch_dup_mmap(struct mm_struct *oldmm,
715 struct mm_struct *mm)
716{
717 PVOP_VCALL2(dup_mmap, oldmm, mm);
718}
719
720static inline void arch_exit_mmap(struct mm_struct *mm)
721{
722 PVOP_VCALL1(exit_mmap, mm);
723}
724
725static inline void __flush_tlb(void)
726{
727 PVOP_VCALL0(flush_tlb_user);
728}
729static inline void __flush_tlb_global(void)
730{
731 PVOP_VCALL0(flush_tlb_kernel);
732}
733static inline void __flush_tlb_single(unsigned long addr)
734{
735 PVOP_VCALL1(flush_tlb_single, addr);
736}
737
738static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
739 unsigned long va)
740{
741 PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
742}
743
744static inline void paravirt_alloc_pt(struct mm_struct *mm, unsigned pfn)
745{
746 PVOP_VCALL2(alloc_pt, mm, pfn);
747}
748static inline void paravirt_release_pt(unsigned pfn)
749{
750 PVOP_VCALL1(release_pt, pfn);
751}
752
753static inline void paravirt_alloc_pd(unsigned pfn)
754{
755 PVOP_VCALL1(alloc_pd, pfn);
756}
757
758static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
759 unsigned start, unsigned count)
760{
761 PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
762}
763static inline void paravirt_release_pd(unsigned pfn)
764{
765 PVOP_VCALL1(release_pd, pfn);
766}
767
768#ifdef CONFIG_HIGHPTE
769static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
770{
771 unsigned long ret;
772 ret = PVOP_CALL2(unsigned long, kmap_atomic_pte, page, type);
773 return (void *)ret;
774}
775#endif
776
777static inline void pte_update(struct mm_struct *mm, unsigned long addr,
778 pte_t *ptep)
779{
780 PVOP_VCALL3(pte_update, mm, addr, ptep);
781}
782
783static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
784 pte_t *ptep)
785{
786 PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
787}
788
789#ifdef CONFIG_X86_PAE
790static inline pte_t __pte(unsigned long long val)
791{
792 unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
793 val, val >> 32);
794 return (pte_t) { ret, ret >> 32 };
795}
796
797static inline pmd_t __pmd(unsigned long long val)
798{
799 return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
800}
801
802static inline pgd_t __pgd(unsigned long long val)
803{
804 return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
805}
806
807static inline unsigned long long pte_val(pte_t x)
808{
809 return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
810}
811
812static inline unsigned long long pmd_val(pmd_t x)
813{
814 return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
815}
816
817static inline unsigned long long pgd_val(pgd_t x)
818{
819 return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
820}
821
822static inline void set_pte(pte_t *ptep, pte_t pteval)
823{
824 PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
825}
826
827static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
828 pte_t *ptep, pte_t pteval)
829{
830 /* 5 arg words */
831 paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
832}
833
834static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
835{
836 PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
837}
838
839static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
840 pte_t *ptep, pte_t pte)
841{
842 /* 5 arg words */
843 paravirt_ops.set_pte_present(mm, addr, ptep, pte);
844}
845
846static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
847{
848 PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
849}
850
851static inline void set_pud(pud_t *pudp, pud_t pudval)
852{
853 PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
854}
855
856static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
857{
858 PVOP_VCALL3(pte_clear, mm, addr, ptep);
859}
860
861static inline void pmd_clear(pmd_t *pmdp)
862{
863 PVOP_VCALL1(pmd_clear, pmdp);
864}
865
866#else /* !CONFIG_X86_PAE */
867
868static inline pte_t __pte(unsigned long val)
869{
870 return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
871}
872
873static inline pgd_t __pgd(unsigned long val)
874{
875 return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
876}
877
878static inline unsigned long pte_val(pte_t x)
879{
880 return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
881}
882
883static inline unsigned long pgd_val(pgd_t x)
884{
885 return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
886}
887
888static inline void set_pte(pte_t *ptep, pte_t pteval)
889{
890 PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
891}
892
893static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
894 pte_t *ptep, pte_t pteval)
895{
896 PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
897}
898
899static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
900{
901 PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
902}
903#endif /* CONFIG_X86_PAE */
904
905#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
906static inline void arch_enter_lazy_cpu_mode(void)
907{
908 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
909}
910
911static inline void arch_leave_lazy_cpu_mode(void)
912{
913 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
914}
915
916static inline void arch_flush_lazy_cpu_mode(void)
917{
918 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
919}
920
921
922#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
923static inline void arch_enter_lazy_mmu_mode(void)
924{
925 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
926}
927
928static inline void arch_leave_lazy_mmu_mode(void)
929{
930 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
931}
932
933static inline void arch_flush_lazy_mmu_mode(void)
934{
935 PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
936}
937
938void _paravirt_nop(void);
939#define paravirt_nop ((void *)_paravirt_nop)
940
941/* These all sit in the .parainstructions section to tell us what to patch. */
942struct paravirt_patch_site {
943 u8 *instr; /* original instructions */
944 u8 instrtype; /* type of this instruction */
945 u8 len; /* length of original instruction */
946 u16 clobbers; /* what registers you may clobber */
947};
948
949extern struct paravirt_patch_site __parainstructions[],
950 __parainstructions_end[];
951
952static inline unsigned long __raw_local_save_flags(void)
953{
954 unsigned long f;
955
956 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
957 PARAVIRT_CALL
958 "popl %%edx; popl %%ecx")
959 : "=a"(f)
960 : paravirt_type(save_fl),
961 paravirt_clobber(CLBR_EAX)
962 : "memory", "cc");
963 return f;
964}
965
966static inline void raw_local_irq_restore(unsigned long f)
967{
968 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
969 PARAVIRT_CALL
970 "popl %%edx; popl %%ecx")
971 : "=a"(f)
972 : "0"(f),
973 paravirt_type(restore_fl),
974 paravirt_clobber(CLBR_EAX)
975 : "memory", "cc");
976}
977
978static inline void raw_local_irq_disable(void)
979{
980 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
981 PARAVIRT_CALL
982 "popl %%edx; popl %%ecx")
983 :
984 : paravirt_type(irq_disable),
985 paravirt_clobber(CLBR_EAX)
986 : "memory", "eax", "cc");
987}
988
989static inline void raw_local_irq_enable(void)
990{
991 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
992 PARAVIRT_CALL
993 "popl %%edx; popl %%ecx")
994 :
995 : paravirt_type(irq_enable),
996 paravirt_clobber(CLBR_EAX)
997 : "memory", "eax", "cc");
998}
999
1000static inline unsigned long __raw_local_irq_save(void)
1001{
1002 unsigned long f;
1003
1004 f = __raw_local_save_flags();
1005 raw_local_irq_disable();
1006 return f;
1007}
1008
1009#define CLI_STRING \
1010 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1011 "call *paravirt_ops+%c[paravirt_cli_type]*4;" \
1012 "popl %%edx; popl %%ecx", \
1013 "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1014
1015#define STI_STRING \
1016 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1017 "call *paravirt_ops+%c[paravirt_sti_type]*4;" \
1018 "popl %%edx; popl %%ecx", \
1019 "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1020
1021#define CLI_STI_CLOBBERS , "%eax"
1022#define CLI_STI_INPUT_ARGS \
1023 , \
1024 [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)), \
1025 [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)), \
1026 paravirt_clobber(CLBR_EAX)
1027
1028/* Make sure as little as possible of this mess escapes. */
1029#undef PARAVIRT_CALL
1030#undef __PVOP_CALL
1031#undef __PVOP_VCALL
1032#undef PVOP_VCALL0
1033#undef PVOP_CALL0
1034#undef PVOP_VCALL1
1035#undef PVOP_CALL1
1036#undef PVOP_VCALL2
1037#undef PVOP_CALL2
1038#undef PVOP_VCALL3
1039#undef PVOP_CALL3
1040#undef PVOP_VCALL4
1041#undef PVOP_CALL4
1042
1043#else /* __ASSEMBLY__ */
1044
1045#define PARA_PATCH(off) ((off) / 4)
1046
1047#define PARA_SITE(ptype, clobbers, ops) \
1048771:; \
1049 ops; \
1050772:; \
1051 .pushsection .parainstructions,"a"; \
1052 .long 771b; \
1053 .byte ptype; \
1054 .byte 772b-771b; \
1055 .short clobbers; \
1056 .popsection
1057
1058#define INTERRUPT_RETURN \
1059 PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE, \
1060 jmp *%cs:paravirt_ops+PARAVIRT_iret)
1061
1062#define DISABLE_INTERRUPTS(clobbers) \
1063 PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers, \
1064 pushl %eax; pushl %ecx; pushl %edx; \
1065 call *%cs:paravirt_ops+PARAVIRT_irq_disable; \
1066 popl %edx; popl %ecx; popl %eax) \
1067
1068#define ENABLE_INTERRUPTS(clobbers) \
1069 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers, \
1070 pushl %eax; pushl %ecx; pushl %edx; \
1071 call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
1072 popl %edx; popl %ecx; popl %eax)
1073
1074#define ENABLE_INTERRUPTS_SYSEXIT \
1075 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE, \
1076 jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1077
1078#define GET_CR0_INTO_EAX \
1079 push %ecx; push %edx; \
1080 call *paravirt_ops+PARAVIRT_read_cr0; \
1081 pop %edx; pop %ecx
1082
1083#endif /* __ASSEMBLY__ */
1084#endif /* CONFIG_PARAVIRT */
1085#endif /* __ASM_PARAVIRT_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 08:27:41 -0500