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
 121 #ifdef CONFIG_X86_LOCAL_APIC
 122         void (*apic_write)(unsigned long reg, unsigned long v);
 123         void (*apic_write_atomic)(unsigned long reg, unsigned long v);
 124         unsigned long (*apic_read)(unsigned long reg);
 125         void (*setup_boot_clock)(void);
 126         void (*setup_secondary_clock)(void);
 127 #endif
 128
 129         void (*flush_tlb_user)(void);
 130         void (*flush_tlb_kernel)(void);
 131         void (*flush_tlb_single)(u32 addr);
 132
 133         void (*map_pt_hook)(int type, pte_t *va, u32 pfn);
 134
 135         void (*alloc_pt)(u32 pfn);
 136         void (*alloc_pd)(u32 pfn);
 137         void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 138         void (*release_pt)(u32 pfn);
 139         void (*release_pd)(u32 pfn);
 140
 141         void (*set_pte)(pte_t *ptep, pte_t pteval);
 142         void (*set_pte_at)(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval);
 143         void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
 144         void (*pte_update)(struct mm_struct *mm, u32 addr, pte_t *ptep);
 145         void (*pte_update_defer)(struct mm_struct *mm, u32 addr, pte_t *ptep);
 146 #ifdef CONFIG_X86_PAE
 147         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 148         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
 149         void (*set_pud)(pud_t *pudp, pud_t pudval);
 150         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 151         void (*pmd_clear)(pmd_t *pmdp);
 152 #endif
 153
 154         void (*set_lazy_mode)(int mode);
 155
 156         /* These two are jmp to, not actually called. */
 157         void (*irq_enable_sysexit)(void);
 158         void (*iret)(void);
 159
 160         void (*startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp);
 161 };
 162
 163 /* Mark a paravirt probe function. */
 164 #define paravirt_probe(fn)                                              \
 165  static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
 166                 __attribute__((__section__(".paravirtprobe"))) = fn
 167
 168 extern struct paravirt_ops paravirt_ops;
 169
 170 #define paravirt_enabled() (paravirt_ops.paravirt_enabled)
 171
 172 static inline void load_esp0(struct tss_struct *tss,
 173                              struct thread_struct *thread)
 174 {
 175         paravirt_ops.load_esp0(tss, thread);
 176 }
 177
 178 #define ARCH_SETUP                      paravirt_ops.arch_setup();
 179 static inline unsigned long get_wallclock(void)
 180 {
 181         return paravirt_ops.get_wallclock();
 182 }
 183
 184 static inline int set_wallclock(unsigned long nowtime)
 185 {
 186         return paravirt_ops.set_wallclock(nowtime);
 187 }
 188
 189 static inline void (*choose_time_init(void))(void)
 190 {
 191         return paravirt_ops.time_init;
 192 }
 193
 194 /* The paravirtualized CPUID instruction. */
 195 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 196                            unsigned int *ecx, unsigned int *edx)
 197 {
 198         paravirt_ops.cpuid(eax, ebx, ecx, edx);
 199 }
 200
 201 /*
 202  * These special macros can be used to get or set a debugging register
 203  */
 204 #define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
 205 #define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
 206
 207 #define clts() paravirt_ops.clts()
 208
 209 #define read_cr0() paravirt_ops.read_cr0()
 210 #define write_cr0(x) paravirt_ops.write_cr0(x)
 211
 212 #define read_cr2() paravirt_ops.read_cr2()
 213 #define write_cr2(x) paravirt_ops.write_cr2(x)
 214
 215 #define read_cr3() paravirt_ops.read_cr3()
 216 #define write_cr3(x) paravirt_ops.write_cr3(x)
 217
 218 #define read_cr4() paravirt_ops.read_cr4()
 219 #define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
 220 #define write_cr4(x) paravirt_ops.write_cr4(x)
 221
 222 static inline void raw_safe_halt(void)
 223 {
 224         paravirt_ops.safe_halt();
 225 }
 226
 227 static inline void halt(void)
 228 {
 229         paravirt_ops.safe_halt();
 230 }
 231 #define wbinvd() paravirt_ops.wbinvd()
 232
 233 #define get_kernel_rpl()  (paravirt_ops.kernel_rpl)
 234
 235 #define rdmsr(msr,val1,val2) do {                               \
 236         int _err;                                               \
 237         u64 _l = paravirt_ops.read_msr(msr,&_err);              \
 238         val1 = (u32)_l;                                         \
 239         val2 = _l >> 32;                                        \
 240 } while(0)
 241
 242 #define wrmsr(msr,val1,val2) do {                               \
 243         u64 _l = ((u64)(val2) << 32) | (val1);                  \
 244         paravirt_ops.write_msr((msr), _l);                      \
 245 } while(0)
 246
 247 #define rdmsrl(msr,val) do {                                    \
 248         int _err;                                               \
 249         val = paravirt_ops.read_msr((msr),&_err);               \
 250 } while(0)
 251
 252 #define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
 253 #define wrmsr_safe(msr,a,b) ({                                  \
 254         u64 _l = ((u64)(b) << 32) | (a);                        \
 255         paravirt_ops.write_msr((msr),_l);                       \
 256 })
 257
 258 /* rdmsr with exception handling */
 259 #define rdmsr_safe(msr,a,b) ({                                  \
 260         int _err;                                               \
 261         u64 _l = paravirt_ops.read_msr(msr,&_err);              \
 262         (*a) = (u32)_l;                                         \
 263         (*b) = _l >> 32;                                        \
 264         _err; })
 265
 266 #define rdtsc(low,high) do {                                    \
 267         u64 _l = paravirt_ops.read_tsc();                       \
 268         low = (u32)_l;                                          \
 269         high = _l >> 32;                                        \
 270 } while(0)
 271
 272 #define rdtscl(low) do {                                        \
 273         u64 _l = paravirt_ops.read_tsc();                       \
 274         low = (int)_l;                                          \
 275 } while(0)
 276
 277 #define rdtscll(val) (val = paravirt_ops.read_tsc())
 278
 279 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
 280 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
 281
 282 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 283
 284 #define rdpmc(counter,low,high) do {                            \
 285         u64 _l = paravirt_ops.read_pmc();                       \
 286         low = (u32)_l;                                          \
 287         high = _l >> 32;                                        \
 288 } while(0)
 289
 290 #define load_TR_desc() (paravirt_ops.load_tr_desc())
 291 #define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
 292 #define load_idt(dtr) (paravirt_ops.load_idt(dtr))
 293 #define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
 294 #define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
 295 #define store_idt(dtr) (paravirt_ops.store_idt(dtr))
 296 #define store_tr(tr) ((tr) = paravirt_ops.store_tr())
 297 #define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
 298 #define write_ldt_entry(dt, entry, low, high)                           \
 299         (paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
 300 #define write_gdt_entry(dt, entry, low, high)                           \
 301         (paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
 302 #define write_idt_entry(dt, entry, low, high)                           \
 303         (paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
 304 #define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
 305
 306 /* The paravirtualized I/O functions */
 307 static inline void slow_down_io(void) {
 308         paravirt_ops.io_delay();
 309 #ifdef REALLY_SLOW_IO
 310         paravirt_ops.io_delay();
 311         paravirt_ops.io_delay();
 312         paravirt_ops.io_delay();
 313 #endif
 314 }
 315
 316 #ifdef CONFIG_X86_LOCAL_APIC
 317 /*
 318  * Basic functions accessing APICs.
 319  */
 320 static inline void apic_write(unsigned long reg, unsigned long v)
 321 {
 322         paravirt_ops.apic_write(reg,v);
 323 }
 324
 325 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
 326 {
 327         paravirt_ops.apic_write_atomic(reg,v);
 328 }
 329
 330 static inline unsigned long apic_read(unsigned long reg)
 331 {
 332         return paravirt_ops.apic_read(reg);
 333 }
 334
 335 static inline void setup_boot_clock(void)
 336 {
 337         paravirt_ops.setup_boot_clock();
 338 }
 339
 340 static inline void setup_secondary_clock(void)
 341 {
 342         paravirt_ops.setup_secondary_clock();
 343 }
 344 #endif
 345
 346 #ifdef CONFIG_SMP
 347 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 348                                     unsigned long start_esp)
 349 {
 350         return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp);
 351 }
 352 #endif
 353
 354 #define __flush_tlb() paravirt_ops.flush_tlb_user()
 355 #define __flush_tlb_global() paravirt_ops.flush_tlb_kernel()
 356 #define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr)
 357
 358 #define paravirt_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn)
 359
 360 #define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn)
 361 #define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn)
 362
 363 #define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn)
 364 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \
 365         paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count)
 366 #define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn)
 367
 368 static inline void set_pte(pte_t *ptep, pte_t pteval)
 369 {
 370         paravirt_ops.set_pte(ptep, pteval);
 371 }
 372
 373 static inline void set_pte_at(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval)
 374 {
 375         paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
 376 }
 377
 378 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 379 {
 380         paravirt_ops.set_pmd(pmdp, pmdval);
 381 }
 382
 383 static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep)
 384 {
 385         paravirt_ops.pte_update(mm, addr, ptep);
 386 }
 387
 388 static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep)
 389 {
 390         paravirt_ops.pte_update_defer(mm, addr, ptep);
 391 }
 392
 393 #ifdef CONFIG_X86_PAE
 394 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 395 {
 396         paravirt_ops.set_pte_atomic(ptep, pteval);
 397 }
 398
 399 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
 400 {
 401         paravirt_ops.set_pte_present(mm, addr, ptep, pte);
 402 }
 403
 404 static inline void set_pud(pud_t *pudp, pud_t pudval)
 405 {
 406         paravirt_ops.set_pud(pudp, pudval);
 407 }
 408
 409 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 410 {
 411         paravirt_ops.pte_clear(mm, addr, ptep);
 412 }
 413
 414 static inline void pmd_clear(pmd_t *pmdp)
 415 {
 416         paravirt_ops.pmd_clear(pmdp);
 417 }
 418 #endif
 419
 420 /* Lazy mode for batching updates / context switch */
 421 #define PARAVIRT_LAZY_NONE 0
 422 #define PARAVIRT_LAZY_MMU  1
 423 #define PARAVIRT_LAZY_CPU  2
 424
 425 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
 426 #define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU)
 427 #define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
 428
 429 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
 430 #define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU)
 431 #define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
 432
 433 /* These all sit in the .parainstructions section to tell us what to patch. */
 434 struct paravirt_patch {
 435         u8 *instr;              /* original instructions */
 436         u8 instrtype;           /* type of this instruction */
 437         u8 len;                 /* length of original instruction */
 438         u16 clobbers;           /* what registers you may clobber */
 439 };
 440
 441 #define paravirt_alt(insn_string, typenum, clobber)     \
 442         "771:\n\t" insn_string "\n" "772:\n"            \
 443         ".pushsection .parainstructions,\"a\"\n"        \
 444         "  .long 771b\n"                                \
 445         "  .byte " __stringify(typenum) "\n"            \
 446         "  .byte 772b-771b\n"                           \
 447         "  .short " __stringify(clobber) "\n"           \
 448         ".popsection"
 449
 450 static inline unsigned long __raw_local_save_flags(void)
 451 {
 452         unsigned long f;
 453
 454         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 455                                            "call *%1;"
 456                                            "popl %%edx; popl %%ecx",
 457                                           PARAVIRT_SAVE_FLAGS, CLBR_NONE)
 458                              : "=a"(f): "m"(paravirt_ops.save_fl)
 459                              : "memory", "cc");
 460         return f;
 461 }
 462
 463 static inline void raw_local_irq_restore(unsigned long f)
 464 {
 465         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 466                                            "call *%1;"
 467                                            "popl %%edx; popl %%ecx",
 468                                           PARAVIRT_RESTORE_FLAGS, CLBR_EAX)
 469                              : "=a"(f) : "m" (paravirt_ops.restore_fl), "0"(f)
 470                              : "memory", "cc");
 471 }
 472
 473 static inline void raw_local_irq_disable(void)
 474 {
 475         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 476                                            "call *%0;"
 477                                            "popl %%edx; popl %%ecx",
 478                                           PARAVIRT_IRQ_DISABLE, CLBR_EAX)
 479                              : : "m" (paravirt_ops.irq_disable)
 480                              : "memory", "eax", "cc");
 481 }
 482
 483 static inline void raw_local_irq_enable(void)
 484 {
 485         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 486                                            "call *%0;"
 487                                            "popl %%edx; popl %%ecx",
 488                                           PARAVIRT_IRQ_ENABLE, CLBR_EAX)
 489                              : : "m" (paravirt_ops.irq_enable)
 490                              : "memory", "eax", "cc");
 491 }
 492
 493 static inline unsigned long __raw_local_irq_save(void)
 494 {
 495         unsigned long f;
 496
 497         __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
 498                                            "call *%1; pushl %%eax;"
 499                                            "call *%2; popl %%eax;"
 500                                            "popl %%edx; popl %%ecx",
 501                                           PARAVIRT_SAVE_FLAGS_IRQ_DISABLE,
 502                                           CLBR_NONE)
 503                              : "=a"(f)
 504                              : "m" (paravirt_ops.save_fl),
 505                                "m" (paravirt_ops.irq_disable)
 506                              : "memory", "cc");
 507         return f;
 508 }
 509
 510 #define CLI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;"             \
 511                      "call *paravirt_ops+%c[irq_disable];"              \
 512                      "popl %%edx; popl %%ecx",                          \
 513                      PARAVIRT_IRQ_DISABLE, CLBR_EAX)
 514
 515 #define STI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;"             \
 516                      "call *paravirt_ops+%c[irq_enable];"               \
 517                      "popl %%edx; popl %%ecx",                          \
 518                      PARAVIRT_IRQ_ENABLE, CLBR_EAX)
 519 #define CLI_STI_CLOBBERS , "%eax"
 520 #define CLI_STI_INPUT_ARGS \
 521         ,                                                               \
 522         [irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)), \
 523         [irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable))
 524
 525 #else  /* __ASSEMBLY__ */
 526
 527 #define PARA_PATCH(ptype, clobbers, ops)        \
 528 771:;                                           \
 529         ops;                                    \
 530 772:;                                           \
 531         .pushsection .parainstructions,"a";     \
 532          .long 771b;                            \
 533          .byte ptype;                           \
 534          .byte 772b-771b;                       \
 535          .short clobbers;                       \
 536         .popsection
 537
 538 #define INTERRUPT_RETURN                                \
 539         PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY, \
 540         jmp *%cs:paravirt_ops+PARAVIRT_iret)
 541
 542 #define DISABLE_INTERRUPTS(clobbers)                    \
 543         PARA_PATCH(PARAVIRT_IRQ_DISABLE, clobbers,      \
 544         pushl %ecx; pushl %edx;                         \
 545         call *paravirt_ops+PARAVIRT_irq_disable;        \
 546         popl %edx; popl %ecx)                           \
 547
 548 #define ENABLE_INTERRUPTS(clobbers)                     \
 549         PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers,       \
 550         pushl %ecx; pushl %edx;                         \
 551         call *%cs:paravirt_ops+PARAVIRT_irq_enable;     \
 552         popl %edx; popl %ecx)
 553
 554 #define ENABLE_INTERRUPTS_SYSEXIT                       \
 555         PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY,      \
 556         jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
 557
 558 #define GET_CR0_INTO_EAX                        \
 559         call *paravirt_ops+PARAVIRT_read_cr0
 560
 561 #endif /* __ASSEMBLY__ */
 562 #endif /* CONFIG_PARAVIRT */
 563 #endif  /* __ASM_PARAVIRT_H */