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x86: adjust assembly macros on 64-bit as well.
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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 #include <asm/asm.h>
9
10 /* Bitmask of what can be clobbered: usually at least eax. */
11 #define CLBR_NONE 0x0
12 #define CLBR_EAX 0x1
13 #define CLBR_ECX 0x2
14 #define CLBR_EDX 0x4
15 #define CLBR_ANY 0x7
16
17 #ifndef __ASSEMBLY__
18 #include <linux/types.h>
19 #include <linux/cpumask.h>
20 #include <asm/kmap_types.h>
21 #include <asm/desc_defs.h>
22
23 struct page;
24 struct thread_struct;
25 struct desc_ptr;
26 struct tss_struct;
27 struct mm_struct;
28 struct desc_struct;
29
30 /* general info */
31 struct pv_info {
32         unsigned int kernel_rpl;
33         int shared_kernel_pmd;
34         int paravirt_enabled;
35         const char *name;
36 };
37
38 struct pv_init_ops {
39         /*
40          * Patch may replace one of the defined code sequences with
41          * arbitrary code, subject to the same register constraints.
42          * This generally means the code is not free to clobber any
43          * registers other than EAX.  The patch function should return
44          * the number of bytes of code generated, as we nop pad the
45          * rest in generic code.
46          */
47         unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
48                           unsigned long addr, unsigned len);
49
50         /* Basic arch-specific setup */
51         void (*arch_setup)(void);
52         char *(*memory_setup)(void);
53         void (*post_allocator_init)(void);
54
55         /* Print a banner to identify the environment */
56         void (*banner)(void);
57 };
58
59
60 struct pv_lazy_ops {
61         /* Set deferred update mode, used for batching operations. */
62         void (*enter)(void);
63         void (*leave)(void);
64 };
65
66 struct pv_time_ops {
67         void (*time_init)(void);
68
69         /* Set and set time of day */
70         unsigned long (*get_wallclock)(void);
71         int (*set_wallclock)(unsigned long);
72
73         unsigned long long (*sched_clock)(void);
74         unsigned long (*get_cpu_khz)(void);
75 };
76
77 struct pv_cpu_ops {
78         /* hooks for various privileged instructions */
79         unsigned long (*get_debugreg)(int regno);
80         void (*set_debugreg)(int regno, unsigned long value);
81
82         void (*clts)(void);
83
84         unsigned long (*read_cr0)(void);
85         void (*write_cr0)(unsigned long);
86
87         unsigned long (*read_cr4_safe)(void);
88         unsigned long (*read_cr4)(void);
89         void (*write_cr4)(unsigned long);
90
91         /* Segment descriptor handling */
92         void (*load_tr_desc)(void);
93         void (*load_gdt)(const struct desc_ptr *);
94         void (*load_idt)(const struct desc_ptr *);
95         void (*store_gdt)(struct desc_ptr *);
96         void (*store_idt)(struct desc_ptr *);
97         void (*set_ldt)(const void *desc, unsigned entries);
98         unsigned long (*store_tr)(void);
99         void (*load_tls)(struct thread_struct *t, unsigned int cpu);
100         void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
101                                 const void *desc);
102         void (*write_gdt_entry)(struct desc_struct *,
103                                 int entrynum, const void *desc, int size);
104         void (*write_idt_entry)(gate_desc *,
105                                 int entrynum, const gate_desc *gate);
106         void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
107
108         void (*set_iopl_mask)(unsigned mask);
109
110         void (*wbinvd)(void);
111         void (*io_delay)(void);
112
113         /* cpuid emulation, mostly so that caps bits can be disabled */
114         void (*cpuid)(unsigned int *eax, unsigned int *ebx,
115                       unsigned int *ecx, unsigned int *edx);
116
117         /* MSR, PMC and TSR operations.
118            err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
119         u64 (*read_msr)(unsigned int msr, int *err);
120         int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
121
122         u64 (*read_tsc)(void);
123         u64 (*read_pmc)(int counter);
124         unsigned long long (*read_tscp)(unsigned int *aux);
125
126         /* These two are jmp to, not actually called. */
127         void (*irq_enable_syscall_ret)(void);
128         void (*iret)(void);
129
130         struct pv_lazy_ops lazy_mode;
131 };
132
133 struct pv_irq_ops {
134         void (*init_IRQ)(void);
135
136         /*
137          * Get/set interrupt state.  save_fl and restore_fl are only
138          * expected to use X86_EFLAGS_IF; all other bits
139          * returned from save_fl are undefined, and may be ignored by
140          * restore_fl.
141          */
142         unsigned long (*save_fl)(void);
143         void (*restore_fl)(unsigned long);
144         void (*irq_disable)(void);
145         void (*irq_enable)(void);
146         void (*safe_halt)(void);
147         void (*halt)(void);
148 };
149
150 struct pv_apic_ops {
151 #ifdef CONFIG_X86_LOCAL_APIC
152         /*
153          * Direct APIC operations, principally for VMI.  Ideally
154          * these shouldn't be in this interface.
155          */
156         void (*apic_write)(unsigned long reg, u32 v);
157         void (*apic_write_atomic)(unsigned long reg, u32 v);
158         u32 (*apic_read)(unsigned long reg);
159         void (*setup_boot_clock)(void);
160         void (*setup_secondary_clock)(void);
161
162         void (*startup_ipi_hook)(int phys_apicid,
163                                  unsigned long start_eip,
164                                  unsigned long start_esp);
165 #endif
166 };
167
168 struct pv_mmu_ops {
169         /*
170          * Called before/after init_mm pagetable setup. setup_start
171          * may reset %cr3, and may pre-install parts of the pagetable;
172          * pagetable setup is expected to preserve any existing
173          * mapping.
174          */
175         void (*pagetable_setup_start)(pgd_t *pgd_base);
176         void (*pagetable_setup_done)(pgd_t *pgd_base);
177
178         unsigned long (*read_cr2)(void);
179         void (*write_cr2)(unsigned long);
180
181         unsigned long (*read_cr3)(void);
182         void (*write_cr3)(unsigned long);
183
184         /*
185          * Hooks for intercepting the creation/use/destruction of an
186          * mm_struct.
187          */
188         void (*activate_mm)(struct mm_struct *prev,
189                             struct mm_struct *next);
190         void (*dup_mmap)(struct mm_struct *oldmm,
191                          struct mm_struct *mm);
192         void (*exit_mmap)(struct mm_struct *mm);
193
194
195         /* TLB operations */
196         void (*flush_tlb_user)(void);
197         void (*flush_tlb_kernel)(void);
198         void (*flush_tlb_single)(unsigned long addr);
199         void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
200                                  unsigned long va);
201
202         /* Hooks for allocating/releasing pagetable pages */
203         void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
204         void (*alloc_pd)(u32 pfn);
205         void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
206         void (*release_pt)(u32 pfn);
207         void (*release_pd)(u32 pfn);
208
209         /* Pagetable manipulation functions */
210         void (*set_pte)(pte_t *ptep, pte_t pteval);
211         void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
212                            pte_t *ptep, pte_t pteval);
213         void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
214         void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
215         void (*pte_update_defer)(struct mm_struct *mm,
216                                  unsigned long addr, pte_t *ptep);
217
218 #ifdef CONFIG_X86_PAE
219         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
220         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr,
221                                 pte_t *ptep, pte_t pte);
222         void (*set_pud)(pud_t *pudp, pud_t pudval);
223         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
224         void (*pmd_clear)(pmd_t *pmdp);
225
226         unsigned long long (*pte_val)(pte_t);
227         unsigned long long (*pmd_val)(pmd_t);
228         unsigned long long (*pgd_val)(pgd_t);
229
230         pte_t (*make_pte)(unsigned long long pte);
231         pmd_t (*make_pmd)(unsigned long long pmd);
232         pgd_t (*make_pgd)(unsigned long long pgd);
233 #else
234         unsigned long (*pte_val)(pte_t);
235         unsigned long (*pgd_val)(pgd_t);
236
237         pte_t (*make_pte)(unsigned long pte);
238         pgd_t (*make_pgd)(unsigned long pgd);
239 #endif
240
241 #ifdef CONFIG_HIGHPTE
242         void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
243 #endif
244
245         struct pv_lazy_ops lazy_mode;
246 };
247
248 /* This contains all the paravirt structures: we get a convenient
249  * number for each function using the offset which we use to indicate
250  * what to patch. */
251 struct paravirt_patch_template
252 {
253         struct pv_init_ops pv_init_ops;
254         struct pv_time_ops pv_time_ops;
255         struct pv_cpu_ops pv_cpu_ops;
256         struct pv_irq_ops pv_irq_ops;
257         struct pv_apic_ops pv_apic_ops;
258         struct pv_mmu_ops pv_mmu_ops;
259 };
260
261 extern struct pv_info pv_info;
262 extern struct pv_init_ops pv_init_ops;
263 extern struct pv_time_ops pv_time_ops;
264 extern struct pv_cpu_ops pv_cpu_ops;
265 extern struct pv_irq_ops pv_irq_ops;
266 extern struct pv_apic_ops pv_apic_ops;
267 extern struct pv_mmu_ops pv_mmu_ops;
268
269 #define PARAVIRT_PATCH(x)                                       \
270         (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
271
272 #define paravirt_type(op)                               \
273         [paravirt_typenum] "i" (PARAVIRT_PATCH(op)),    \
274         [paravirt_opptr] "m" (op)
275 #define paravirt_clobber(clobber)               \
276         [paravirt_clobber] "i" (clobber)
277
278 /*
279  * Generate some code, and mark it as patchable by the
280  * apply_paravirt() alternate instruction patcher.
281  */
282 #define _paravirt_alt(insn_string, type, clobber)       \
283         "771:\n\t" insn_string "\n" "772:\n"            \
284         ".pushsection .parainstructions,\"a\"\n"        \
285         _ASM_ALIGN "\n"                                 \
286         _ASM_PTR " 771b\n"                              \
287         "  .byte " type "\n"                            \
288         "  .byte 772b-771b\n"                           \
289         "  .short " clobber "\n"                        \
290         ".popsection\n"
291
292 /* Generate patchable code, with the default asm parameters. */
293 #define paravirt_alt(insn_string)                                       \
294         _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
295
296 unsigned paravirt_patch_nop(void);
297 unsigned paravirt_patch_ignore(unsigned len);
298 unsigned paravirt_patch_call(void *insnbuf,
299                              const void *target, u16 tgt_clobbers,
300                              unsigned long addr, u16 site_clobbers,
301                              unsigned len);
302 unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
303                             unsigned long addr, unsigned len);
304 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
305                                 unsigned long addr, unsigned len);
306
307 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
308                               const char *start, const char *end);
309
310 int paravirt_disable_iospace(void);
311
312 /*
313  * This generates an indirect call based on the operation type number.
314  * The type number, computed in PARAVIRT_PATCH, is derived from the
315  * offset into the paravirt_patch_template structure, and can therefore be
316  * freely converted back into a structure offset.
317  */
318 #define PARAVIRT_CALL   "call *%[paravirt_opptr];"
319
320 /*
321  * These macros are intended to wrap calls through one of the paravirt
322  * ops structs, so that they can be later identified and patched at
323  * runtime.
324  *
325  * Normally, a call to a pv_op function is a simple indirect call:
326  * (pv_op_struct.operations)(args...).
327  *
328  * Unfortunately, this is a relatively slow operation for modern CPUs,
329  * because it cannot necessarily determine what the destination
330  * address is.  In this case, the address is a runtime constant, so at
331  * the very least we can patch the call to e a simple direct call, or
332  * ideally, patch an inline implementation into the callsite.  (Direct
333  * calls are essentially free, because the call and return addresses
334  * are completely predictable.)
335  *
336  * For i386, these macros rely on the standard gcc "regparm(3)" calling
337  * convention, in which the first three arguments are placed in %eax,
338  * %edx, %ecx (in that order), and the remaining arguments are placed
339  * on the stack.  All caller-save registers (eax,edx,ecx) are expected
340  * to be modified (either clobbered or used for return values).
341  * X86_64, on the other hand, already specifies a register-based calling
342  * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
343  * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
344  * special handling for dealing with 4 arguments, unlike i386.
345  * However, x86_64 also have to clobber all caller saved registers, which
346  * unfortunately, are quite a bit (r8 - r11)
347  *
348  * The call instruction itself is marked by placing its start address
349  * and size into the .parainstructions section, so that
350  * apply_paravirt() in arch/i386/kernel/alternative.c can do the
351  * appropriate patching under the control of the backend pv_init_ops
352  * implementation.
353  *
354  * Unfortunately there's no way to get gcc to generate the args setup
355  * for the call, and then allow the call itself to be generated by an
356  * inline asm.  Because of this, we must do the complete arg setup and
357  * return value handling from within these macros.  This is fairly
358  * cumbersome.
359  *
360  * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
361  * It could be extended to more arguments, but there would be little
362  * to be gained from that.  For each number of arguments, there are
363  * the two VCALL and CALL variants for void and non-void functions.
364  *
365  * When there is a return value, the invoker of the macro must specify
366  * the return type.  The macro then uses sizeof() on that type to
367  * determine whether its a 32 or 64 bit value, and places the return
368  * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
369  * 64-bit). For x86_64 machines, it just returns at %rax regardless of
370  * the return value size.
371  *
372  * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
373  * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
374  * in low,high order
375  *
376  * Small structures are passed and returned in registers.  The macro
377  * calling convention can't directly deal with this, so the wrapper
378  * functions must do this.
379  *
380  * These PVOP_* macros are only defined within this header.  This
381  * means that all uses must be wrapped in inline functions.  This also
382  * makes sure the incoming and outgoing types are always correct.
383  */
384 #ifdef CONFIG_X86_32
385 #define PVOP_VCALL_ARGS                 unsigned long __eax, __edx, __ecx
386 #define PVOP_CALL_ARGS                  PVOP_VCALL_ARGS
387 #define PVOP_VCALL_CLOBBERS             "=a" (__eax), "=d" (__edx),     \
388                                         "=c" (__ecx)
389 #define PVOP_CALL_CLOBBERS              PVOP_VCALL_CLOBBERS
390 #define EXTRA_CLOBBERS
391 #define VEXTRA_CLOBBERS
392 #else
393 #define PVOP_VCALL_ARGS         unsigned long __edi, __esi, __edx, __ecx
394 #define PVOP_CALL_ARGS          PVOP_VCALL_ARGS, __eax
395 #define PVOP_VCALL_CLOBBERS     "=D" (__edi),                           \
396                                 "=S" (__esi), "=d" (__edx),             \
397                                 "=c" (__ecx)
398
399 #define PVOP_CALL_CLOBBERS      PVOP_VCALL_CLOBBERS, "=a" (__eax)
400
401 #define EXTRA_CLOBBERS   , "r8", "r9", "r10", "r11"
402 #define VEXTRA_CLOBBERS  , "rax", "r8", "r9", "r10", "r11"
403 #endif
404
405 #define __PVOP_CALL(rettype, op, pre, post, ...)                        \
406         ({                                                              \
407                 rettype __ret;                                          \
408                 PVOP_CALL_ARGS;                                 \
409                 /* This is 32-bit specific, but is okay in 64-bit */    \
410                 /* since this condition will never hold */              \
411                 if (sizeof(rettype) > sizeof(unsigned long)) {          \
412                         asm volatile(pre                                \
413                                      paravirt_alt(PARAVIRT_CALL)        \
414                                      post                               \
415                                      : PVOP_CALL_CLOBBERS               \
416                                      : paravirt_type(op),               \
417                                        paravirt_clobber(CLBR_ANY),      \
418                                        ##__VA_ARGS__                    \
419                                      : "memory", "cc" EXTRA_CLOBBERS);  \
420                         __ret = (rettype)((((u64)__edx) << 32) | __eax); \
421                 } else {                                                \
422                         asm volatile(pre                                \
423                                      paravirt_alt(PARAVIRT_CALL)        \
424                                      post                               \
425                                      : PVOP_CALL_CLOBBERS               \
426                                      : paravirt_type(op),               \
427                                        paravirt_clobber(CLBR_ANY),      \
428                                        ##__VA_ARGS__                    \
429                                      : "memory", "cc" EXTRA_CLOBBERS);  \
430                         __ret = (rettype)__eax;                         \
431                 }                                                       \
432                 __ret;                                                  \
433         })
434 #define __PVOP_VCALL(op, pre, post, ...)                                \
435         ({                                                              \
436                 PVOP_VCALL_ARGS;                                        \
437                 asm volatile(pre                                        \
438                              paravirt_alt(PARAVIRT_CALL)                \
439                              post                                       \
440                              : PVOP_VCALL_CLOBBERS                      \
441                              : paravirt_type(op),                       \
442                                paravirt_clobber(CLBR_ANY),              \
443                                ##__VA_ARGS__                            \
444                              : "memory", "cc" VEXTRA_CLOBBERS);         \
445         })
446
447 #define PVOP_CALL0(rettype, op)                                         \
448         __PVOP_CALL(rettype, op, "", "")
449 #define PVOP_VCALL0(op)                                                 \
450         __PVOP_VCALL(op, "", "")
451
452 #define PVOP_CALL1(rettype, op, arg1)                                   \
453         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)))
454 #define PVOP_VCALL1(op, arg1)                                           \
455         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)))
456
457 #define PVOP_CALL2(rettype, op, arg1, arg2)                             \
458         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)),   \
459         "1" ((unsigned long)(arg2)))
460 #define PVOP_VCALL2(op, arg1, arg2)                                     \
461         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)),           \
462         "1" ((unsigned long)(arg2)))
463
464 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3)                       \
465         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)),   \
466         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)))
467 #define PVOP_VCALL3(op, arg1, arg2, arg3)                               \
468         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)),           \
469         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)))
470
471 /* This is the only difference in x86_64. We can make it much simpler */
472 #ifdef CONFIG_X86_32
473 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4)                 \
474         __PVOP_CALL(rettype, op,                                        \
475                     "push %[_arg4];", "lea 4(%%esp),%%esp;",            \
476                     "0" ((u32)(arg1)), "1" ((u32)(arg2)),               \
477                     "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
478 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4)                         \
479         __PVOP_VCALL(op,                                                \
480                     "push %[_arg4];", "lea 4(%%esp),%%esp;",            \
481                     "0" ((u32)(arg1)), "1" ((u32)(arg2)),               \
482                     "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
483 #else
484 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4)                 \
485         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)),   \
486         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)),         \
487         "3"((unsigned long)(arg4)))
488 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4)                         \
489         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)),           \
490         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)),         \
491         "3"((unsigned long)(arg4)))
492 #endif
493
494 static inline int paravirt_enabled(void)
495 {
496         return pv_info.paravirt_enabled;
497 }
498
499 static inline void load_sp0(struct tss_struct *tss,
500                              struct thread_struct *thread)
501 {
502         PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
503 }
504
505 #define ARCH_SETUP                      pv_init_ops.arch_setup();
506 static inline unsigned long get_wallclock(void)
507 {
508         return PVOP_CALL0(unsigned long, pv_time_ops.get_wallclock);
509 }
510
511 static inline int set_wallclock(unsigned long nowtime)
512 {
513         return PVOP_CALL1(int, pv_time_ops.set_wallclock, nowtime);
514 }
515
516 static inline void (*choose_time_init(void))(void)
517 {
518         return pv_time_ops.time_init;
519 }
520
521 /* The paravirtualized CPUID instruction. */
522 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
523                            unsigned int *ecx, unsigned int *edx)
524 {
525         PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
526 }
527
528 /*
529  * These special macros can be used to get or set a debugging register
530  */
531 static inline unsigned long paravirt_get_debugreg(int reg)
532 {
533         return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
534 }
535 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
536 static inline void set_debugreg(unsigned long val, int reg)
537 {
538         PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
539 }
540
541 static inline void clts(void)
542 {
543         PVOP_VCALL0(pv_cpu_ops.clts);
544 }
545
546 static inline unsigned long read_cr0(void)
547 {
548         return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
549 }
550
551 static inline void write_cr0(unsigned long x)
552 {
553         PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
554 }
555
556 static inline unsigned long read_cr2(void)
557 {
558         return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
559 }
560
561 static inline void write_cr2(unsigned long x)
562 {
563         PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
564 }
565
566 static inline unsigned long read_cr3(void)
567 {
568         return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
569 }
570
571 static inline void write_cr3(unsigned long x)
572 {
573         PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
574 }
575
576 static inline unsigned long read_cr4(void)
577 {
578         return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
579 }
580 static inline unsigned long read_cr4_safe(void)
581 {
582         return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe);
583 }
584
585 static inline void write_cr4(unsigned long x)
586 {
587         PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
588 }
589
590 static inline void raw_safe_halt(void)
591 {
592         PVOP_VCALL0(pv_irq_ops.safe_halt);
593 }
594
595 static inline void halt(void)
596 {
597         PVOP_VCALL0(pv_irq_ops.safe_halt);
598 }
599
600 static inline void wbinvd(void)
601 {
602         PVOP_VCALL0(pv_cpu_ops.wbinvd);
603 }
604
605 #define get_kernel_rpl()  (pv_info.kernel_rpl)
606
607 static inline u64 paravirt_read_msr(unsigned msr, int *err)
608 {
609         return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
610 }
611 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
612 {
613         return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
614 }
615
616 /* These should all do BUG_ON(_err), but our headers are too tangled. */
617 #define rdmsr(msr,val1,val2) do {               \
618         int _err;                               \
619         u64 _l = paravirt_read_msr(msr, &_err); \
620         val1 = (u32)_l;                         \
621         val2 = _l >> 32;                        \
622 } while(0)
623
624 #define wrmsr(msr,val1,val2) do {               \
625         paravirt_write_msr(msr, val1, val2);    \
626 } while(0)
627
628 #define rdmsrl(msr,val) do {                    \
629         int _err;                               \
630         val = paravirt_read_msr(msr, &_err);    \
631 } while(0)
632
633 #define wrmsrl(msr,val)         wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
634 #define wrmsr_safe(msr,a,b)     paravirt_write_msr(msr, a, b)
635
636 /* rdmsr with exception handling */
637 #define rdmsr_safe(msr,a,b) ({                  \
638         int _err;                               \
639         u64 _l = paravirt_read_msr(msr, &_err); \
640         (*a) = (u32)_l;                         \
641         (*b) = _l >> 32;                        \
642         _err; })
643
644
645 static inline u64 paravirt_read_tsc(void)
646 {
647         return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
648 }
649
650 #define rdtscl(low) do {                        \
651         u64 _l = paravirt_read_tsc();           \
652         low = (int)_l;                          \
653 } while(0)
654
655 #define rdtscll(val) (val = paravirt_read_tsc())
656
657 static inline unsigned long long paravirt_sched_clock(void)
658 {
659         return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
660 }
661 #define calculate_cpu_khz() (pv_time_ops.get_cpu_khz())
662
663 static inline unsigned long long paravirt_read_pmc(int counter)
664 {
665         return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
666 }
667
668 #define rdpmc(counter,low,high) do {            \
669         u64 _l = paravirt_read_pmc(counter);    \
670         low = (u32)_l;                          \
671         high = _l >> 32;                        \
672 } while(0)
673
674 static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
675 {
676         return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
677 }
678
679 #define rdtscp(low, high, aux)                          \
680 do {                                                    \
681         int __aux;                                      \
682         unsigned long __val = paravirt_rdtscp(&__aux);  \
683         (low) = (u32)__val;                             \
684         (high) = (u32)(__val >> 32);                    \
685         (aux) = __aux;                                  \
686 } while (0)
687
688 #define rdtscpll(val, aux)                              \
689 do {                                                    \
690         unsigned long __aux;                            \
691         val = paravirt_rdtscp(&__aux);                  \
692         (aux) = __aux;                                  \
693 } while (0)
694
695 static inline void load_TR_desc(void)
696 {
697         PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
698 }
699 static inline void load_gdt(const struct desc_ptr *dtr)
700 {
701         PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
702 }
703 static inline void load_idt(const struct desc_ptr *dtr)
704 {
705         PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
706 }
707 static inline void set_ldt(const void *addr, unsigned entries)
708 {
709         PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
710 }
711 static inline void store_gdt(struct desc_ptr *dtr)
712 {
713         PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
714 }
715 static inline void store_idt(struct desc_ptr *dtr)
716 {
717         PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
718 }
719 static inline unsigned long paravirt_store_tr(void)
720 {
721         return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
722 }
723 #define store_tr(tr)    ((tr) = paravirt_store_tr())
724 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
725 {
726         PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
727 }
728
729 static inline void write_ldt_entry(struct desc_struct *dt, int entry,
730                                    const void *desc)
731 {
732         PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
733 }
734
735 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
736                                    void *desc, int type)
737 {
738         PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
739 }
740
741 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
742 {
743         PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
744 }
745 static inline void set_iopl_mask(unsigned mask)
746 {
747         PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
748 }
749
750 /* The paravirtualized I/O functions */
751 static inline void slow_down_io(void) {
752         pv_cpu_ops.io_delay();
753 #ifdef REALLY_SLOW_IO
754         pv_cpu_ops.io_delay();
755         pv_cpu_ops.io_delay();
756         pv_cpu_ops.io_delay();
757 #endif
758 }
759
760 #ifdef CONFIG_X86_LOCAL_APIC
761 /*
762  * Basic functions accessing APICs.
763  */
764 static inline void apic_write(unsigned long reg, u32 v)
765 {
766         PVOP_VCALL2(pv_apic_ops.apic_write, reg, v);
767 }
768
769 static inline void apic_write_atomic(unsigned long reg, u32 v)
770 {
771         PVOP_VCALL2(pv_apic_ops.apic_write_atomic, reg, v);
772 }
773
774 static inline u32 apic_read(unsigned long reg)
775 {
776         return PVOP_CALL1(unsigned long, pv_apic_ops.apic_read, reg);
777 }
778
779 static inline void setup_boot_clock(void)
780 {
781         PVOP_VCALL0(pv_apic_ops.setup_boot_clock);
782 }
783
784 static inline void setup_secondary_clock(void)
785 {
786         PVOP_VCALL0(pv_apic_ops.setup_secondary_clock);
787 }
788 #endif
789
790 static inline void paravirt_post_allocator_init(void)
791 {
792         if (pv_init_ops.post_allocator_init)
793                 (*pv_init_ops.post_allocator_init)();
794 }
795
796 static inline void paravirt_pagetable_setup_start(pgd_t *base)
797 {
798         (*pv_mmu_ops.pagetable_setup_start)(base);
799 }
800
801 static inline void paravirt_pagetable_setup_done(pgd_t *base)
802 {
803         (*pv_mmu_ops.pagetable_setup_done)(base);
804 }
805
806 #ifdef CONFIG_SMP
807 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
808                                     unsigned long start_esp)
809 {
810         PVOP_VCALL3(pv_apic_ops.startup_ipi_hook,
811                     phys_apicid, start_eip, start_esp);
812 }
813 #endif
814
815 static inline void paravirt_activate_mm(struct mm_struct *prev,
816                                         struct mm_struct *next)
817 {
818         PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
819 }
820
821 static inline void arch_dup_mmap(struct mm_struct *oldmm,
822                                  struct mm_struct *mm)
823 {
824         PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
825 }
826
827 static inline void arch_exit_mmap(struct mm_struct *mm)
828 {
829         PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
830 }
831
832 static inline void __flush_tlb(void)
833 {
834         PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
835 }
836 static inline void __flush_tlb_global(void)
837 {
838         PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
839 }
840 static inline void __flush_tlb_single(unsigned long addr)
841 {
842         PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
843 }
844
845 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
846                                     unsigned long va)
847 {
848         PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, &cpumask, mm, va);
849 }
850
851 static inline void paravirt_alloc_pt(struct mm_struct *mm, unsigned pfn)
852 {
853         PVOP_VCALL2(pv_mmu_ops.alloc_pt, mm, pfn);
854 }
855 static inline void paravirt_release_pt(unsigned pfn)
856 {
857         PVOP_VCALL1(pv_mmu_ops.release_pt, pfn);
858 }
859
860 static inline void paravirt_alloc_pd(unsigned pfn)
861 {
862         PVOP_VCALL1(pv_mmu_ops.alloc_pd, pfn);
863 }
864
865 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
866                                            unsigned start, unsigned count)
867 {
868         PVOP_VCALL4(pv_mmu_ops.alloc_pd_clone, pfn, clonepfn, start, count);
869 }
870 static inline void paravirt_release_pd(unsigned pfn)
871 {
872         PVOP_VCALL1(pv_mmu_ops.release_pd, pfn);
873 }
874
875 #ifdef CONFIG_HIGHPTE
876 static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
877 {
878         unsigned long ret;
879         ret = PVOP_CALL2(unsigned long, pv_mmu_ops.kmap_atomic_pte, page, type);
880         return (void *)ret;
881 }
882 #endif
883
884 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
885                               pte_t *ptep)
886 {
887         PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
888 }
889
890 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
891                                     pte_t *ptep)
892 {
893         PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
894 }
895
896 #ifdef CONFIG_X86_PAE
897 static inline pte_t __pte(unsigned long long val)
898 {
899         unsigned long long ret = PVOP_CALL2(unsigned long long,
900                                             pv_mmu_ops.make_pte,
901                                             val, val >> 32);
902         return (pte_t) { ret, ret >> 32 };
903 }
904
905 static inline pmd_t __pmd(unsigned long long val)
906 {
907         return (pmd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pmd,
908                                     val, val >> 32) };
909 }
910
911 static inline pgd_t __pgd(unsigned long long val)
912 {
913         return (pgd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pgd,
914                                     val, val >> 32) };
915 }
916
917 static inline unsigned long long pte_val(pte_t x)
918 {
919         return PVOP_CALL2(unsigned long long, pv_mmu_ops.pte_val,
920                           x.pte_low, x.pte_high);
921 }
922
923 static inline unsigned long long pmd_val(pmd_t x)
924 {
925         return PVOP_CALL2(unsigned long long, pv_mmu_ops.pmd_val,
926                           x.pmd, x.pmd >> 32);
927 }
928
929 static inline unsigned long long pgd_val(pgd_t x)
930 {
931         return PVOP_CALL2(unsigned long long, pv_mmu_ops.pgd_val,
932                           x.pgd, x.pgd >> 32);
933 }
934
935 static inline void set_pte(pte_t *ptep, pte_t pteval)
936 {
937         PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pteval.pte_low, pteval.pte_high);
938 }
939
940 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
941                               pte_t *ptep, pte_t pteval)
942 {
943         /* 5 arg words */
944         pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
945 }
946
947 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
948 {
949         PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
950                     pteval.pte_low, pteval.pte_high);
951 }
952
953 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
954                                    pte_t *ptep, pte_t pte)
955 {
956         /* 5 arg words */
957         pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
958 }
959
960 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
961 {
962         PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp,
963                     pmdval.pmd, pmdval.pmd >> 32);
964 }
965
966 static inline void set_pud(pud_t *pudp, pud_t pudval)
967 {
968         PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
969                     pudval.pgd.pgd, pudval.pgd.pgd >> 32);
970 }
971
972 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
973 {
974         PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
975 }
976
977 static inline void pmd_clear(pmd_t *pmdp)
978 {
979         PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
980 }
981
982 #else  /* !CONFIG_X86_PAE */
983
984 static inline pte_t __pte(unsigned long val)
985 {
986         return (pte_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pte, val) };
987 }
988
989 static inline pgd_t __pgd(unsigned long val)
990 {
991         return (pgd_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pgd, val) };
992 }
993
994 static inline unsigned long pte_val(pte_t x)
995 {
996         return PVOP_CALL1(unsigned long, pv_mmu_ops.pte_val, x.pte_low);
997 }
998
999 static inline unsigned long pgd_val(pgd_t x)
1000 {
1001         return PVOP_CALL1(unsigned long, pv_mmu_ops.pgd_val, x.pgd);
1002 }
1003
1004 static inline void set_pte(pte_t *ptep, pte_t pteval)
1005 {
1006         PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pteval.pte_low);
1007 }
1008
1009 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
1010                               pte_t *ptep, pte_t pteval)
1011 {
1012         PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pteval.pte_low);
1013 }
1014
1015 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
1016 {
1017         PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
1018 }
1019 #endif  /* CONFIG_X86_PAE */
1020
1021 /* Lazy mode for batching updates / context switch */
1022 enum paravirt_lazy_mode {
1023         PARAVIRT_LAZY_NONE,
1024         PARAVIRT_LAZY_MMU,
1025         PARAVIRT_LAZY_CPU,
1026 };
1027
1028 enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
1029 void paravirt_enter_lazy_cpu(void);
1030 void paravirt_leave_lazy_cpu(void);
1031 void paravirt_enter_lazy_mmu(void);
1032 void paravirt_leave_lazy_mmu(void);
1033 void paravirt_leave_lazy(enum paravirt_lazy_mode mode);
1034
1035 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
1036 static inline void arch_enter_lazy_cpu_mode(void)
1037 {
1038         PVOP_VCALL0(pv_cpu_ops.lazy_mode.enter);
1039 }
1040
1041 static inline void arch_leave_lazy_cpu_mode(void)
1042 {
1043         PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave);
1044 }
1045
1046 static inline void arch_flush_lazy_cpu_mode(void)
1047 {
1048         if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)) {
1049                 arch_leave_lazy_cpu_mode();
1050                 arch_enter_lazy_cpu_mode();
1051         }
1052 }
1053
1054
1055 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
1056 static inline void arch_enter_lazy_mmu_mode(void)
1057 {
1058         PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
1059 }
1060
1061 static inline void arch_leave_lazy_mmu_mode(void)
1062 {
1063         PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
1064 }
1065
1066 static inline void arch_flush_lazy_mmu_mode(void)
1067 {
1068         if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU)) {
1069                 arch_leave_lazy_mmu_mode();
1070                 arch_enter_lazy_mmu_mode();
1071         }
1072 }
1073
1074 void _paravirt_nop(void);
1075 #define paravirt_nop    ((void *)_paravirt_nop)
1076
1077 /* These all sit in the .parainstructions section to tell us what to patch. */
1078 struct paravirt_patch_site {
1079         u8 *instr;              /* original instructions */
1080         u8 instrtype;           /* type of this instruction */
1081         u8 len;                 /* length of original instruction */
1082         u16 clobbers;           /* what registers you may clobber */
1083 };
1084
1085 extern struct paravirt_patch_site __parainstructions[],
1086         __parainstructions_end[];
1087
1088 static inline unsigned long __raw_local_save_flags(void)
1089 {
1090         unsigned long f;
1091
1092         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1093                                   PARAVIRT_CALL
1094                                   "popl %%edx; popl %%ecx")
1095                      : "=a"(f)
1096                      : paravirt_type(pv_irq_ops.save_fl),
1097                        paravirt_clobber(CLBR_EAX)
1098                      : "memory", "cc");
1099         return f;
1100 }
1101
1102 static inline void raw_local_irq_restore(unsigned long f)
1103 {
1104         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1105                                   PARAVIRT_CALL
1106                                   "popl %%edx; popl %%ecx")
1107                      : "=a"(f)
1108                      : "0"(f),
1109                        paravirt_type(pv_irq_ops.restore_fl),
1110                        paravirt_clobber(CLBR_EAX)
1111                      : "memory", "cc");
1112 }
1113
1114 static inline void raw_local_irq_disable(void)
1115 {
1116         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1117                                   PARAVIRT_CALL
1118                                   "popl %%edx; popl %%ecx")
1119                      :
1120                      : paravirt_type(pv_irq_ops.irq_disable),
1121                        paravirt_clobber(CLBR_EAX)
1122                      : "memory", "eax", "cc");
1123 }
1124
1125 static inline void raw_local_irq_enable(void)
1126 {
1127         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1128                                   PARAVIRT_CALL
1129                                   "popl %%edx; popl %%ecx")
1130                      :
1131                      : paravirt_type(pv_irq_ops.irq_enable),
1132                        paravirt_clobber(CLBR_EAX)
1133                      : "memory", "eax", "cc");
1134 }
1135
1136 static inline unsigned long __raw_local_irq_save(void)
1137 {
1138         unsigned long f;
1139
1140         f = __raw_local_save_flags();
1141         raw_local_irq_disable();
1142         return f;
1143 }
1144
1145 /* Make sure as little as possible of this mess escapes. */
1146 #undef PARAVIRT_CALL
1147 #undef __PVOP_CALL
1148 #undef __PVOP_VCALL
1149 #undef PVOP_VCALL0
1150 #undef PVOP_CALL0
1151 #undef PVOP_VCALL1
1152 #undef PVOP_CALL1
1153 #undef PVOP_VCALL2
1154 #undef PVOP_CALL2
1155 #undef PVOP_VCALL3
1156 #undef PVOP_CALL3
1157 #undef PVOP_VCALL4
1158 #undef PVOP_CALL4
1159
1160 #else  /* __ASSEMBLY__ */
1161
1162 #define _PVSITE(ptype, clobbers, ops, word, algn)       \
1163 771:;                                           \
1164         ops;                                    \
1165 772:;                                           \
1166         .pushsection .parainstructions,"a";     \
1167          .align algn;                           \
1168          word 771b;                             \
1169          .byte ptype;                           \
1170          .byte 772b-771b;                       \
1171          .short clobbers;                       \
1172         .popsection
1173
1174
1175 #ifdef CONFIG_X86_64
1176 #define PV_SAVE_REGS   pushq %rax; pushq %rdi; pushq %rcx; pushq %rdx
1177 #define PV_RESTORE_REGS popq %rdx; popq %rcx; popq %rdi; popq %rax
1178 #define PARA_PATCH(struct, off)        ((PARAVIRT_PATCH_##struct + (off)) / 8)
1179 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8)
1180 #else
1181 #define PV_SAVE_REGS   pushl %eax; pushl %edi; pushl %ecx; pushl %edx
1182 #define PV_RESTORE_REGS popl %edx; popl %ecx; popl %edi; popl %eax
1183 #define PARA_PATCH(struct, off)        ((PARAVIRT_PATCH_##struct + (off)) / 4)
1184 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4)
1185 #endif
1186
1187 #define INTERRUPT_RETURN                                                \
1188         PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE,       \
1189                   jmp *%cs:pv_cpu_ops+PV_CPU_iret)
1190
1191 #define DISABLE_INTERRUPTS(clobbers)                                    \
1192         PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
1193                   PV_SAVE_REGS;                 \
1194                   call *%cs:pv_irq_ops+PV_IRQ_irq_disable;              \
1195                   PV_RESTORE_REGS;)                     \
1196
1197 #define ENABLE_INTERRUPTS(clobbers)                                     \
1198         PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers,  \
1199                   PV_SAVE_REGS;                 \
1200                   call *%cs:pv_irq_ops+PV_IRQ_irq_enable;               \
1201                   PV_RESTORE_REGS;)
1202
1203 #define ENABLE_INTERRUPTS_SYSCALL_RET                                   \
1204         PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_syscall_ret),\
1205                   CLBR_NONE,                                            \
1206                   jmp *%cs:pv_cpu_ops+PV_CPU_irq_enable_syscall_ret)
1207
1208 #ifdef CONFIG_X86_32
1209 #define GET_CR0_INTO_EAX                        \
1210         push %ecx; push %edx;                   \
1211         call *pv_cpu_ops+PV_CPU_read_cr0;       \
1212         pop %edx; pop %ecx
1213 #endif
1214
1215 #endif /* __ASSEMBLY__ */
1216 #endif /* CONFIG_PARAVIRT */
1217 #endif  /* __ASM_PARAVIRT_H */