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