include/asm-i386/paravirt.h

   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 #include <linux/stringify.h>
   6 #include <asm/page.h>
   7
   8 #ifdef CONFIG_PARAVIRT
   9 /* These are the most performance critical ops, so we want to be able to patch
  10  * callers */
  11 #define PARAVIRT_IRQ_DISABLE 0
  12 #define PARAVIRT_IRQ_ENABLE 1
  13 #define PARAVIRT_RESTORE_FLAGS 2
  14 #define PARAVIRT_SAVE_FLAGS 3
  15 #define PARAVIRT_SAVE_FLAGS_IRQ_DISABLE 4
  16 #define PARAVIRT_INTERRUPT_RETURN 5
  17 #define PARAVIRT_STI_SYSEXIT 6
  18
  19 /* Bitmask of what can be clobbered: usually at least eax. */
  20 #define CLBR_NONE 0x0
  21 #define CLBR_EAX 0x1
  22 #define CLBR_ECX 0x2
  23 #define CLBR_EDX 0x4
  24 #define CLBR_ANY 0x7
  25
  26 #ifndef __ASSEMBLY__
  27 #include <linux/types.h>
  28
  29 struct thread_struct;
  30 struct Xgt_desc_struct;
  31 struct tss_struct;
  32 struct mm_struct;
  33 struct desc_struct;
  34 struct paravirt_ops
  35 {
  36         unsigned int kernel_rpl;
  37         int paravirt_enabled;
  38         const char *name;
  39
  40         /*
  41          * Patch may replace one of the defined code sequences with arbitrary
  42          * code, subject to the same register constraints.  This generally
  43          * means the code is not free to clobber any registers other than EAX.
  44          * The patch function should return the number of bytes of code
  45          * generated, as we nop pad the rest in generic code.
  46          */
  47         unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len);
  48
  49         void (*arch_setup)(void);
  50         char *(*memory_setup)(void);
  51         void (*init_IRQ)(void);
  52
  53         void (*banner)(void);
  54
  55         unsigned long (*get_wallclock)(void);
  56         int (*set_wallclock)(unsigned long);
  57         void (*time_init)(void);
  58
  59         void (*cpuid)(unsigned int *eax, unsigned int *ebx,
  60                       unsigned int *ecx, unsigned int *edx);
  61
  62         unsigned long (*get_debugreg)(int regno);
  63         void (*set_debugreg)(int regno, unsigned long value);
  64
  65         void (*clts)(void);
  66
  67         unsigned long (*read_cr0)(void);
  68         void (*write_cr0)(unsigned long);
  69
  70         unsigned long (*read_cr2)(void);
  71         void (*write_cr2)(unsigned long);
  72
  73         unsigned long (*read_cr3)(void);
  74         void (*write_cr3)(unsigned long);
  75
  76         unsigned long (*read_cr4_safe)(void);
  77         unsigned long (*read_cr4)(void);
  78         void (*write_cr4)(unsigned long);
  79
  80         unsigned long (*save_fl)(void);
  81         void (*restore_fl)(unsigned long);
  82         void (*irq_disable)(void);
  83         void (*irq_enable)(void);
  84         void (*safe_halt)(void);
  85         void (*halt)(void);
  86         void (*wbinvd)(void);
  87
  88         /* err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
  89         u64 (*read_msr)(unsigned int msr, int *err);
  90         int (*write_msr)(unsigned int msr, u64 val);
  91
  92         u64 (*read_tsc)(void);
  93         u64 (*read_pmc)(void);
  94         u64 (*get_scheduled_cycles)(void);
  95         unsigned long (*get_cpu_khz)(void);
  96
  97         void (*load_tr_desc)(void);
  98         void (*load_gdt)(const struct Xgt_desc_struct *);
  99         void (*load_idt)(const struct Xgt_desc_struct *);
 100         void (*store_gdt)(struct Xgt_desc_struct *);
 101         void (*store_idt)(struct Xgt_desc_struct *);
 102         void (*set_ldt)(const void *desc, unsigned entries);
 103         unsigned long (*store_tr)(void);
 104         void (*load_tls)(struct thread_struct *t, unsigned int cpu);
 105         void (*write_ldt_entry)(struct desc_struct *,
 106                                 int entrynum, u32 low, u32 high);
 107         void (*write_gdt_entry)(struct desc_struct *,
 108                                 int entrynum, u32 low, u32 high);
 109         void (*write_idt_entry)(struct desc_struct *,
 110                                 int entrynum, u32 low, u32 high);
 111         void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
 112
 113         void (*set_iopl_mask)(unsigned mask);
 114
 115         void (*io_delay)(void);
 116
 117 #ifdef CONFIG_X86_LOCAL_APIC
 118         void (*apic_write)(unsigned long reg, unsigned long v);
 119         void (*apic_write_atomic)(unsigned long reg, unsigned long v);
 120         unsigned long (*apic_read)(unsigned long reg);
 121         void (*setup_boot_clock)(void);
 122         void (*setup_secondary_clock)(void);
 123 #endif
 124
 125         void (*flush_tlb_user)(void);
 126         void (*flush_tlb_kernel)(void);
 127         void (*flush_tlb_single)(u32 addr);
 128
 129         void (*map_pt_hook)(int type, pte_t *va, u32 pfn);
 130
 131         void (*alloc_pt)(u32 pfn);
 132         void (*alloc_pd)(u32 pfn);
 133         void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 134         void (*release_pt)(u32 pfn);
 135         void (*release_pd)(u32 pfn);
 136
 137         void (*set_pte)(pte_t *ptep, pte_t pteval);
 138         void (*set_pte_at)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval);
 139         void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
 140         void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 141         void (*pte_update_defer)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 142
 143         pte_t (*ptep_get_and_clear)(pte_t *ptep);
 144
 145 #ifdef CONFIG_X86_PAE
 146         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 147         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
 148         void (*set_pud)(pud_t *pudp, pud_t pudval);
 149         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 150         void (*pmd_clear)(pmd_t *pmdp);
 151
 152         unsigned long long (*pte_val)(pte_t);
 153         unsigned long long (*pmd_val)(pmd_t);
 154         unsigned long long (*pgd_val)(pgd_t);
 155
 156         pte_t (*make_pte)(unsigned long long pte);
 157         pmd_t (*make_pmd)(unsigned long long pmd);
 158         pgd_t (*make_pgd)(unsigned long long pgd);
 159 #else
 160         unsigned long (*pte_val)(pte_t);
 161         unsigned long (*pgd_val)(pgd_t);
 162
 163         pte_t (*make_pte)(unsigned long pte);
 164         pgd_t (*make_pgd)(unsigned long pgd);
 165 #endif
 166
 167         void (*set_lazy_mode)(int mode);
 168
 169         /* These two are jmp to, not actually called. */
 170         void (*irq_enable_sysexit)(void);
 171         void (*iret)(void);
 172
 173         void (*startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp);
 174 };
 175
 176 /* Mark a paravirt probe function. */
 177 #define paravirt_probe(fn)                                              \
 178  static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
 179                 __attribute__((__section__(".paravirtprobe"))) = fn
 180
 181 extern struct paravirt_ops paravirt_ops;
 182
 183 #define paravirt_enabled() (paravirt_ops.paravirt_enabled)
 184
 185 static inline void load_esp0(struct tss_struct *tss,
 186                              struct thread_struct *thread)
 187 {
 188         paravirt_ops.load_esp0(tss, thread);
 189 }
 190
 191 #define ARCH_SETUP                      paravirt_ops.arch_setup();
 192 static inline unsigned long get_wallclock(void)
 193 {
 194         return paravirt_ops.get_wallclock();
 195 }
 196
 197 static inline int set_wallclock(unsigned long nowtime)
 198 {
 199         return paravirt_ops.set_wallclock(nowtime);
 200 }
 201
 202 static inline void (*choose_time_init(void))(void)
 203 {
 204         return paravirt_ops.time_init;
 205 }
 206
 207 /* The paravirtualized CPUID instruction. */
 208 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 209                            unsigned int *ecx, unsigned int *edx)
 210 {
 211         paravirt_ops.cpuid(eax, ebx, ecx, edx);
 212 }
 213
 214 /*
 215  * These special macros can be used to get or set a debugging register
 216  */
 217 #define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
 218 #define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
 219
 220 #define clts() paravirt_ops.clts()
 221
 222 #define read_cr0() paravirt_ops.read_cr0()
 223 #define write_cr0(x) paravirt_ops.write_cr0(x)
 224
 225 #define read_cr2() paravirt_ops.read_cr2()
 226 #define write_cr2(x) paravirt_ops.write_cr2(x)
 227
 228 #define read_cr3() paravirt_ops.read_cr3()
 229 #define write_cr3(x) paravirt_ops.write_cr3(x)
 230
 231 #define read_cr4() paravirt_ops.read_cr4()
 232 #define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
 233 #define write_cr4(x) paravirt_ops.write_cr4(x)
 234
 235 #define raw_ptep_get_and_clear(xp)      (paravirt_ops.ptep_get_and_clear(xp))
 236
 237 static inline void raw_safe_halt(void)
 238 {
 239         paravirt_ops.safe_halt();
 240 }
 241
 242 static inline void halt(void)
 243 {
 244         paravirt_ops.safe_halt();
 245 }
 246 #define wbinvd() paravirt_ops.wbinvd()
 247
 248 #define get_kernel_rpl()  (paravirt_ops.kernel_rpl)
 249
 250 /* These should all do BUG_ON(_err), but our headers are too tangled. */
 251 #define rdmsr(msr,val1,val2) do {                               \
 252         int _err;                                               \
 253         u64 _l = paravirt_ops.read_msr(msr,&_err);              \
 254         val1 = (u32)_l;                                         \
 255         val2 = _l >> 32;                                        \
 256 } while(0)
 257
 258 #define wrmsr(msr,val1,val2) do {                               \
 259         u64 _l = ((u64)(val2) << 32) | (val1);                  \
 260         paravirt_ops.write_msr((msr), _l);                      \
 261 } while(0)
 262
 263 #define rdmsrl(msr,val) do {                                    \
 264         int _err;                                               \
 265         val = paravirt_ops.read_msr((msr),&_err);               \
 266 } while(0)
 267
 268 #define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
 269 #define wrmsr_safe(msr,a,b) ({                                  \
 270         u64 _l = ((u64)(b) << 32) | (a);                        \
 271         paravirt_ops.write_msr((msr),_l);                       \
 272 })
 273
 274 /* rdmsr with exception handling */
 275 #define rdmsr_safe(msr,a,b) ({                                  \
 276         int _err;                                               \
 277         u64 _l = paravirt_ops.read_msr(msr,&_err);              \
 278         (*a) = (u32)_l;                                         \
 279         (*b) = _l >> 32;                                        \
 280         _err; })
 281
 282 #define rdtsc(low,high) do {                                    \
 283         u64 _l = paravirt_ops.read_tsc();                       \
 284         low = (u32)_l;                                          \
 285         high = _l >> 32;                                        \
 286 } while(0)
 287
 288 #define rdtscl(low) do {                                        \
 289         u64 _l = paravirt_ops.read_tsc();                       \
 290         low = (int)_l;                                          \
 291 } while(0)
 292
 293 #define rdtscll(val) (val = paravirt_ops.read_tsc())
 294
 295 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
 296 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
 297
 298 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 299
 300 #define rdpmc(counter,low,high) do {                            \
 301         u64 _l = paravirt_ops.read_pmc();                       \
 302         low = (u32)_l;                                          \
 303         high = _l >> 32;                                        \
 304 } while(0)
 305
 306 #define load_TR_desc() (paravirt_ops.load_tr_desc())
 307 #define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
 308 #define load_idt(dtr) (paravirt_ops.load_idt(dtr))
 309 #define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
 310 #define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
 311 #define store_idt(dtr) (paravirt_ops.store_idt(dtr))
 312 #define store_tr(tr) ((tr) = paravirt_ops.store_tr())
 313 #define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
 314 #define write_ldt_entry(dt, entry, low, high)                           \
 315         (paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
 316 #define write_gdt_entry(dt, entry, low, high)                           \
 317         (paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
 318 #define write_idt_entry(dt, entry, low, high)                           \
 319         (paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
 320 #define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
 321
 322 #define __pte(x)        paravirt_ops.make_pte(x)
 323 #define __pgd(x)        paravirt_ops.make_pgd(x)
 324
 325 #define pte_val(x)      paravirt_ops.pte_val(x)
 326 #define pgd_val(x)      paravirt_ops.pgd_val(x)
 327
 328 #ifdef CONFIG_X86_PAE
 329 #define __pmd(x)        paravirt_ops.make_pmd(x)
 330 #define pmd_val(x)      paravirt_ops.pmd_val(x)
 331 #endif
 332
 333 /* The paravirtualized I/O functions */
 334 static inline void slow_down_io(void) {
 335         paravirt_ops.io_delay();
 336 #ifdef REALLY_SLOW_IO
 337         paravirt_ops.io_delay();
 338         paravirt_ops.io_delay();
 339         paravirt_ops.io_delay();
 340 #endif
 341 }
 342
 343 #ifdef CONFIG_X86_LOCAL_APIC
 344 /*
 345  * Basic functions accessing APICs.
 346  */
 347 static inline void apic_write(unsigned long reg, unsigned long v)
 348 {
 349         paravirt_ops.apic_write(reg,v);
 350 }
 351
 352 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
 353 {
 354         paravirt_ops.apic_write_atomic(reg,v);
 355 }
 356
 357 static inline unsigned long apic_read(unsigned long reg)
 358 {
 359         return paravirt_ops.apic_read(reg);
 360 }
 361
 362 static inline void setup_boot_clock(void)
 363 {
 364         paravirt_ops.setup_boot_clock();
 365 }
 366
 367 static inline void setup_secondary_clock(void)
 368 {
 369         paravirt_ops.setup_secondary_clock();
 370 }
 371 #endif
 372
 373
 374 #ifdef CONFIG_SMP
 375 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 376                                     unsigned long start_esp)
 377 {
 378         return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp);
 379 }
 380 #endif
 381
 382 #define __flush_tlb() paravirt_ops.flush_tlb_user()
 383 #define __flush_tlb_global() paravirt_ops.flush_tlb_kernel()
 384 #define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr)
 385
 386 #define paravirt_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn)
 387
 388 #define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn)
 389 #define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn)
 390
 391 #define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn)
 392 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \
 393         paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count)
 394 #define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn)
 395
 396 static inline void set_pte(pte_t *ptep, pte_t pteval)
 397 {
 398         paravirt_ops.set_pte(ptep, pteval);
 399 }
 400
 401 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 402                               pte_t *ptep, pte_t pteval)
 403 {
 404         paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
 405 }
 406
 407 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 408 {
 409         paravirt_ops.set_pmd(pmdp, pmdval);
 410 }
 411
 412 static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep)
 413 {
 414         paravirt_ops.pte_update(mm, addr, ptep);
 415 }
 416
 417 static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep)
 418 {
 419         paravirt_ops.pte_update_defer(mm, addr, ptep);
 420 }
 421
 422 #ifdef CONFIG_X86_PAE
 423 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 424 {
 425         paravirt_ops.set_pte_atomic(ptep, pteval);
 426 }
 427
 428 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
 429 {
 430         paravirt_ops.set_pte_present(mm, addr, ptep, pte);
 431 }
 432
 433 static inline void set_pud(pud_t *pudp, pud_t pudval)
 434 {
 435         paravirt_ops.set_pud(pudp, pudval);
 436 }
 437
 438 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 439 {
 440         paravirt_ops.pte_clear(mm, addr, ptep);
 441 }
 442
 443 static inline void pmd_clear(pmd_t *pmdp)
 444 {
 445         paravirt_ops.pmd_clear(pmdp);
 446 }
 447 #endif
 448
 449 /* Lazy mode for batching updates / context switch */
 450 #define PARAVIRT_LAZY_NONE 0
 451 #define PARAVIRT_LAZY_MMU  1
 452 #define PARAVIRT_LAZY_CPU  2
 453 #define PARAVIRT_LAZY_FLUSH 3
 454
 455 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
 456 #define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU)
 457 #define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
 458 #define arch_flush_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH)
 459
 460 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
 461 #define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU)
 462 #define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
 463 #define arch_flush_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH)
 464
 465 void _paravirt_nop(void);
 466 #define paravirt_nop    ((void *)_paravirt_nop)
 467
 468 /* These all sit in the .parainstructions section to tell us what to patch. */
 469 struct paravirt_patch {
 470         u8 *instr;              /* original instructions */
 471         u8 instrtype;           /* type of this instruction */
 472         u8 len;                 /* length of original instruction */
 473         u16 clobbers;           /* what registers you may clobber */
 474 };
 475
 476 #define paravirt_alt(insn_string, typenum, clobber)     \
 477         "771:\n\t" insn_string "\n" "772:\n"            \
 478         ".pushsection .parainstructions,\"a\"\n"        \
 479         "  .long 771b\n"                                \
 480         "  .byte " __stringify(typenum) "\n"            \
 481         "  .byte 772b-771b\n"                           \
 482         "  .short " __stringify(clobber) "\n"           \
 483         ".popsection"
 484
 485 static inline unsigned long __raw_local_save_flags(void)
 486 {
 487         unsigned long f;
 488
 489         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 490                                            "call *%1;"
 491                                            "popl %%edx; popl %%ecx",
 492                                           PARAVIRT_SAVE_FLAGS, CLBR_NONE)
 493                              : "=a"(f): "m"(paravirt_ops.save_fl)
 494                              : "memory", "cc");
 495         return f;
 496 }
 497
 498 static inline void raw_local_irq_restore(unsigned long f)
 499 {
 500         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 501                                            "call *%1;"
 502                                            "popl %%edx; popl %%ecx",
 503                                           PARAVIRT_RESTORE_FLAGS, CLBR_EAX)
 504                              : "=a"(f) : "m" (paravirt_ops.restore_fl), "0"(f)
 505                              : "memory", "cc");
 506 }
 507
 508 static inline void raw_local_irq_disable(void)
 509 {
 510         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 511                                            "call *%0;"
 512                                            "popl %%edx; popl %%ecx",
 513                                           PARAVIRT_IRQ_DISABLE, CLBR_EAX)
 514                              : : "m" (paravirt_ops.irq_disable)
 515                              : "memory", "eax", "cc");
 516 }
 517
 518 static inline void raw_local_irq_enable(void)
 519 {
 520         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 521                                            "call *%0;"
 522                                            "popl %%edx; popl %%ecx",
 523                                           PARAVIRT_IRQ_ENABLE, CLBR_EAX)
 524                              : : "m" (paravirt_ops.irq_enable)
 525                              : "memory", "eax", "cc");
 526 }
 527
 528 static inline unsigned long __raw_local_irq_save(void)
 529 {
 530         unsigned long f;
 531
 532         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 533                                            "call *%1; pushl %%eax;"
 534                                            "call *%2; popl %%eax;"
 535                                            "popl %%edx; popl %%ecx",
 536                                           PARAVIRT_SAVE_FLAGS_IRQ_DISABLE,
 537                                           CLBR_NONE)
 538                              : "=a"(f)
 539                              : "m" (paravirt_ops.save_fl),
 540                                "m" (paravirt_ops.irq_disable)
 541                              : "memory", "cc");
 542         return f;
 543 }
 544
 545 #define CLI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;"             \
 546                      "call *paravirt_ops+%c[irq_disable];"              \
 547                      "popl %%edx; popl %%ecx",                          \
 548                      PARAVIRT_IRQ_DISABLE, CLBR_EAX)
 549
 550 #define STI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;"             \
 551                      "call *paravirt_ops+%c[irq_enable];"               \
 552                      "popl %%edx; popl %%ecx",                          \
 553                      PARAVIRT_IRQ_ENABLE, CLBR_EAX)
 554 #define CLI_STI_CLOBBERS , "%eax"
 555 #define CLI_STI_INPUT_ARGS \
 556         ,                                                               \
 557         [irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)), \
 558         [irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable))
 559
 560 #else  /* __ASSEMBLY__ */
 561
 562 #define PARA_PATCH(ptype, clobbers, ops)        \
 563 771:;                                           \
 564         ops;                                    \
 565 772:;                                           \
 566         .pushsection .parainstructions,"a";     \
 567          .long 771b;                            \
 568          .byte ptype;                           \
 569          .byte 772b-771b;                       \
 570          .short clobbers;                       \
 571         .popsection
 572
 573 #define INTERRUPT_RETURN                                \
 574         PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY, \
 575         jmp *%cs:paravirt_ops+PARAVIRT_iret)
 576
 577 #define DISABLE_INTERRUPTS(clobbers)                    \
 578         PARA_PATCH(PARAVIRT_IRQ_DISABLE, clobbers,      \
 579         pushl %ecx; pushl %edx;                         \
 580         call *paravirt_ops+PARAVIRT_irq_disable;        \
 581         popl %edx; popl %ecx)                           \
 582
 583 #define ENABLE_INTERRUPTS(clobbers)                     \
 584         PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers,       \
 585         pushl %ecx; pushl %edx;                         \
 586         call *%cs:paravirt_ops+PARAVIRT_irq_enable;     \
 587         popl %edx; popl %ecx)
 588
 589 #define ENABLE_INTERRUPTS_SYSEXIT                       \
 590         PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY,      \
 591         jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
 592
 593 #define GET_CR0_INTO_EAX                        \
 594         call *paravirt_ops+PARAVIRT_read_cr0
 595
 596 #endif /* __ASSEMBLY__ */
 597 #endif /* CONFIG_PARAVIRT */
 598 #endif  /* __ASM_PARAVIRT_H */