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   1 #ifndef __ASM_PARAVIRT_H
   2 #define __ASM_PARAVIRT_H
   3 /* Various instructions on x86 need to be replaced for
   4  * para-virtualization: those hooks are defined here. */
   5
   6 #ifdef CONFIG_PARAVIRT
   7 #include <asm/page.h>
   8
   9 /* Bitmask of what can be clobbered: usually at least eax. */
  10 #define CLBR_NONE 0x0
  11 #define CLBR_EAX 0x1
  12 #define CLBR_ECX 0x2
  13 #define CLBR_EDX 0x4
  14 #define CLBR_ANY 0x7
  15
  16 #ifndef __ASSEMBLY__
  17 #include <linux/types.h>
  18 #include <linux/cpumask.h>
  19
  20 struct thread_struct;
  21 struct Xgt_desc_struct;
  22 struct tss_struct;
  23 struct mm_struct;
  24 struct desc_struct;
  25
  26 /* Lazy mode for batching updates / context switch */
  27 enum paravirt_lazy_mode {
  28         PARAVIRT_LAZY_NONE = 0,
  29         PARAVIRT_LAZY_MMU = 1,
  30         PARAVIRT_LAZY_CPU = 2,
  31 };
  32
  33 struct paravirt_ops
  34 {
  35         unsigned int kernel_rpl;
  36         int shared_kernel_pmd;
  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         /* Basic arch-specific setup */
  50         void (*arch_setup)(void);
  51         char *(*memory_setup)(void);
  52         void (*init_IRQ)(void);
  53         void (*time_init)(void);
  54
  55         /*
  56          * Called before/after init_mm pagetable setup. setup_start
  57          * may reset %cr3, and may pre-install parts of the pagetable;
  58          * pagetable setup is expected to preserve any existing
  59          * mapping.
  60          */
  61         void (*pagetable_setup_start)(pgd_t *pgd_base);
  62         void (*pagetable_setup_done)(pgd_t *pgd_base);
  63
  64         /* Print a banner to identify the environment */
  65         void (*banner)(void);
  66
  67         /* Set and set time of day */
  68         unsigned long (*get_wallclock)(void);
  69         int (*set_wallclock)(unsigned long);
  70
  71         /* cpuid emulation, mostly so that caps bits can be disabled */
  72         void (*cpuid)(unsigned int *eax, unsigned int *ebx,
  73                       unsigned int *ecx, unsigned int *edx);
  74
  75         /* hooks for various privileged instructions */
  76         unsigned long (*get_debugreg)(int regno);
  77         void (*set_debugreg)(int regno, unsigned long value);
  78
  79         void (*clts)(void);
  80
  81         unsigned long (*read_cr0)(void);
  82         void (*write_cr0)(unsigned long);
  83
  84         unsigned long (*read_cr2)(void);
  85         void (*write_cr2)(unsigned long);
  86
  87         unsigned long (*read_cr3)(void);
  88         void (*write_cr3)(unsigned long);
  89
  90         unsigned long (*read_cr4_safe)(void);
  91         unsigned long (*read_cr4)(void);
  92         void (*write_cr4)(unsigned long);
  93
  94         /*
  95          * Get/set interrupt state.  save_fl and restore_fl are only
  96          * expected to use X86_EFLAGS_IF; all other bits
  97          * returned from save_fl are undefined, and may be ignored by
  98          * restore_fl.
  99          */
 100         unsigned long (*save_fl)(void);
 101         void (*restore_fl)(unsigned long);
 102         void (*irq_disable)(void);
 103         void (*irq_enable)(void);
 104         void (*safe_halt)(void);
 105         void (*halt)(void);
 106
 107         void (*wbinvd)(void);
 108
 109         /* MSR, PMC and TSR operations.
 110            err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
 111         u64 (*read_msr)(unsigned int msr, int *err);
 112         int (*write_msr)(unsigned int msr, u64 val);
 113
 114         u64 (*read_tsc)(void);
 115         u64 (*read_pmc)(void);
 116         u64 (*get_scheduled_cycles)(void);
 117         unsigned long (*get_cpu_khz)(void);
 118
 119         /* Segment descriptor handling */
 120         void (*load_tr_desc)(void);
 121         void (*load_gdt)(const struct Xgt_desc_struct *);
 122         void (*load_idt)(const struct Xgt_desc_struct *);
 123         void (*store_gdt)(struct Xgt_desc_struct *);
 124         void (*store_idt)(struct Xgt_desc_struct *);
 125         void (*set_ldt)(const void *desc, unsigned entries);
 126         unsigned long (*store_tr)(void);
 127         void (*load_tls)(struct thread_struct *t, unsigned int cpu);
 128         void (*write_ldt_entry)(struct desc_struct *,
 129                                 int entrynum, u32 low, u32 high);
 130         void (*write_gdt_entry)(struct desc_struct *,
 131                                 int entrynum, u32 low, u32 high);
 132         void (*write_idt_entry)(struct desc_struct *,
 133                                 int entrynum, u32 low, u32 high);
 134         void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
 135
 136         void (*set_iopl_mask)(unsigned mask);
 137         void (*io_delay)(void);
 138
 139         /*
 140          * Hooks for intercepting the creation/use/destruction of an
 141          * mm_struct.
 142          */
 143         void (*activate_mm)(struct mm_struct *prev,
 144                             struct mm_struct *next);
 145         void (*dup_mmap)(struct mm_struct *oldmm,
 146                          struct mm_struct *mm);
 147         void (*exit_mmap)(struct mm_struct *mm);
 148
 149 #ifdef CONFIG_X86_LOCAL_APIC
 150         /*
 151          * Direct APIC operations, principally for VMI.  Ideally
 152          * these shouldn't be in this interface.
 153          */
 154         void (*apic_write)(unsigned long reg, unsigned long v);
 155         void (*apic_write_atomic)(unsigned long reg, unsigned long v);
 156         unsigned long (*apic_read)(unsigned long reg);
 157         void (*setup_boot_clock)(void);
 158         void (*setup_secondary_clock)(void);
 159
 160         void (*startup_ipi_hook)(int phys_apicid,
 161                                  unsigned long start_eip,
 162                                  unsigned long start_esp);
 163 #endif
 164
 165         /* TLB operations */
 166         void (*flush_tlb_user)(void);
 167         void (*flush_tlb_kernel)(void);
 168         void (*flush_tlb_single)(unsigned long addr);
 169         void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
 170                                  unsigned long va);
 171
 172         void (*map_pt_hook)(int type, pte_t *va, u32 pfn);
 173
 174         /* Hooks for allocating/releasing pagetable pages */
 175         void (*alloc_pt)(u32 pfn);
 176         void (*alloc_pd)(u32 pfn);
 177         void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 178         void (*release_pt)(u32 pfn);
 179         void (*release_pd)(u32 pfn);
 180
 181         /* Pagetable manipulation functions */
 182         void (*set_pte)(pte_t *ptep, pte_t pteval);
 183         void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
 184                            pte_t *ptep, pte_t pteval);
 185         void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
 186         void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 187         void (*pte_update_defer)(struct mm_struct *mm,
 188                                  unsigned long addr, pte_t *ptep);
 189
 190         pte_t (*ptep_get_and_clear)(pte_t *ptep);
 191
 192 #ifdef CONFIG_X86_PAE
 193         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 194         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
 195         void (*set_pud)(pud_t *pudp, pud_t pudval);
 196         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 197         void (*pmd_clear)(pmd_t *pmdp);
 198
 199         unsigned long long (*pte_val)(pte_t);
 200         unsigned long long (*pmd_val)(pmd_t);
 201         unsigned long long (*pgd_val)(pgd_t);
 202
 203         pte_t (*make_pte)(unsigned long long pte);
 204         pmd_t (*make_pmd)(unsigned long long pmd);
 205         pgd_t (*make_pgd)(unsigned long long pgd);
 206 #else
 207         unsigned long (*pte_val)(pte_t);
 208         unsigned long (*pgd_val)(pgd_t);
 209
 210         pte_t (*make_pte)(unsigned long pte);
 211         pgd_t (*make_pgd)(unsigned long pgd);
 212 #endif
 213
 214         /* Set deferred update mode, used for batching operations. */
 215         void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
 216
 217         /* These two are jmp to, not actually called. */
 218         void (*irq_enable_sysexit)(void);
 219         void (*iret)(void);
 220 };
 221
 222 /* Mark a paravirt probe function. */
 223 #define paravirt_probe(fn)                                              \
 224  static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
 225                 __attribute__((__section__(".paravirtprobe"))) = fn
 226
 227 extern struct paravirt_ops paravirt_ops;
 228
 229 #define PARAVIRT_PATCH(x)                                       \
 230         (offsetof(struct paravirt_ops, x) / sizeof(void *))
 231
 232 #define paravirt_type(type)                                     \
 233         [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
 234 #define paravirt_clobber(clobber)               \
 235         [paravirt_clobber] "i" (clobber)
 236
 237 /*
 238  * Generate some code, and mark it as patchable by the
 239  * apply_paravirt() alternate instruction patcher.
 240  */
 241 #define _paravirt_alt(insn_string, type, clobber)       \
 242         "771:\n\t" insn_string "\n" "772:\n"            \
 243         ".pushsection .parainstructions,\"a\"\n"        \
 244         "  .long 771b\n"                                \
 245         "  .byte " type "\n"                            \
 246         "  .byte 772b-771b\n"                           \
 247         "  .short " clobber "\n"                        \
 248         ".popsection\n"
 249
 250 /* Generate patchable code, with the default asm parameters. */
 251 #define paravirt_alt(insn_string)                                       \
 252         _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
 253
 254 unsigned paravirt_patch_nop(void);
 255 unsigned paravirt_patch_ignore(unsigned len);
 256 unsigned paravirt_patch_call(void *target, u16 tgt_clobbers,
 257                              void *site, u16 site_clobbers,
 258                              unsigned len);
 259 unsigned paravirt_patch_jmp(void *target, void *site, unsigned len);
 260 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *site, unsigned len);
 261
 262 unsigned paravirt_patch_insns(void *site, unsigned len,
 263                               const char *start, const char *end);
 264
 265
 266 /*
 267  * This generates an indirect call based on the operation type number.
 268  * The type number, computed in PARAVIRT_PATCH, is derived from the
 269  * offset into the paravirt_ops structure, and can therefore be freely
 270  * converted back into a structure offset.
 271  */
 272 #define PARAVIRT_CALL   "call *(paravirt_ops+%c[paravirt_typenum]*4);"
 273
 274 /*
 275  * These macros are intended to wrap calls into a paravirt_ops
 276  * operation, so that they can be later identified and patched at
 277  * runtime.
 278  *
 279  * Normally, a call to a pv_op function is a simple indirect call:
 280  * (paravirt_ops.operations)(args...).
 281  *
 282  * Unfortunately, this is a relatively slow operation for modern CPUs,
 283  * because it cannot necessarily determine what the destination
 284  * address is.  In this case, the address is a runtime constant, so at
 285  * the very least we can patch the call to e a simple direct call, or
 286  * ideally, patch an inline implementation into the callsite.  (Direct
 287  * calls are essentially free, because the call and return addresses
 288  * are completely predictable.)
 289  *
 290  * These macros rely on the standard gcc "regparm(3)" calling
 291  * convention, in which the first three arguments are placed in %eax,
 292  * %edx, %ecx (in that order), and the remaining arguments are placed
 293  * on the stack.  All caller-save registers (eax,edx,ecx) are expected
 294  * to be modified (either clobbered or used for return values).
 295  *
 296  * The call instruction itself is marked by placing its start address
 297  * and size into the .parainstructions section, so that
 298  * apply_paravirt() in arch/i386/kernel/alternative.c can do the
 299  * appropriate patching under the control of the backend paravirt_ops
 300  * implementation.
 301  *
 302  * Unfortunately there's no way to get gcc to generate the args setup
 303  * for the call, and then allow the call itself to be generated by an
 304  * inline asm.  Because of this, we must do the complete arg setup and
 305  * return value handling from within these macros.  This is fairly
 306  * cumbersome.
 307  *
 308  * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
 309  * It could be extended to more arguments, but there would be little
 310  * to be gained from that.  For each number of arguments, there are
 311  * the two VCALL and CALL variants for void and non-void functions.
 312  *
 313  * When there is a return value, the invoker of the macro must specify
 314  * the return type.  The macro then uses sizeof() on that type to
 315  * determine whether its a 32 or 64 bit value, and places the return
 316  * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
 317  * 64-bit).
 318  *
 319  * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
 320  * in low,high order.
 321  *
 322  * Small structures are passed and returned in registers.  The macro
 323  * calling convention can't directly deal with this, so the wrapper
 324  * functions must do this.
 325  *
 326  * These PVOP_* macros are only defined within this header.  This
 327  * means that all uses must be wrapped in inline functions.  This also
 328  * makes sure the incoming and outgoing types are always correct.
 329  */
 330 #define PVOP_CALL0(__rettype, __op)                                     \
 331         ({                                                              \
 332                 __rettype __ret;                                        \
 333                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 334                         unsigned long long __tmp;                       \
 335                         unsigned long __ecx;                            \
 336                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 337                                      : "=A" (__tmp), "=c" (__ecx)       \
 338                                      : paravirt_type(__op),             \
 339                                        paravirt_clobber(CLBR_ANY)       \
 340                                      : "memory", "cc");                 \
 341                         __ret = (__rettype)__tmp;                       \
 342                 } else {                                                \
 343                         unsigned long __tmp, __edx, __ecx;              \
 344                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 345                                      : "=a" (__tmp), "=d" (__edx),      \
 346                                        "=c" (__ecx)                     \
 347                                      : paravirt_type(__op),             \
 348                                        paravirt_clobber(CLBR_ANY)       \
 349                                      : "memory", "cc");                 \
 350                         __ret = (__rettype)__tmp;                       \
 351                 }                                                       \
 352                 __ret;                                                  \
 353         })
 354 #define PVOP_VCALL0(__op)                                               \
 355         ({                                                              \
 356                 unsigned long __eax, __edx, __ecx;                      \
 357                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 358                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 359                              : paravirt_type(__op),                     \
 360                                paravirt_clobber(CLBR_ANY)               \
 361                              : "memory", "cc");                         \
 362         })
 363
 364 #define PVOP_CALL1(__rettype, __op, arg1)                               \
 365         ({                                                              \
 366                 __rettype __ret;                                        \
 367                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 368                         unsigned long long __tmp;                       \
 369                         unsigned long __ecx;                            \
 370                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 371                                      : "=A" (__tmp), "=c" (__ecx)       \
 372                                      : "a" ((u32)(arg1)),               \
 373                                        paravirt_type(__op),             \
 374                                        paravirt_clobber(CLBR_ANY)       \
 375                                      : "memory", "cc");                 \
 376                         __ret = (__rettype)__tmp;                       \
 377                 } else {                                                \
 378                         unsigned long __tmp, __edx, __ecx;              \
 379                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 380                                      : "=a" (__tmp), "=d" (__edx),      \
 381                                        "=c" (__ecx)                     \
 382                                      : "0" ((u32)(arg1)),               \
 383                                        paravirt_type(__op),             \
 384                                        paravirt_clobber(CLBR_ANY)       \
 385                                      : "memory", "cc");                 \
 386                         __ret = (__rettype)__tmp;                       \
 387                 }                                                       \
 388                 __ret;                                                  \
 389         })
 390 #define PVOP_VCALL1(__op, arg1)                                         \
 391         ({                                                              \
 392                 unsigned long __eax, __edx, __ecx;                      \
 393                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 394                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 395                              : "0" ((u32)(arg1)),                       \
 396                                paravirt_type(__op),                     \
 397                                paravirt_clobber(CLBR_ANY)               \
 398                              : "memory", "cc");                         \
 399         })
 400
 401 #define PVOP_CALL2(__rettype, __op, arg1, arg2)                         \
 402         ({                                                              \
 403                 __rettype __ret;                                        \
 404                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 405                         unsigned long long __tmp;                       \
 406                         unsigned long __ecx;                            \
 407                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 408                                      : "=A" (__tmp), "=c" (__ecx)       \
 409                                      : "a" ((u32)(arg1)),               \
 410                                        "d" ((u32)(arg2)),               \
 411                                        paravirt_type(__op),             \
 412                                        paravirt_clobber(CLBR_ANY)       \
 413                                      : "memory", "cc");                 \
 414                         __ret = (__rettype)__tmp;                       \
 415                 } else {                                                \
 416                         unsigned long __tmp, __edx, __ecx;              \
 417                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 418                                      : "=a" (__tmp), "=d" (__edx),      \
 419                                        "=c" (__ecx)                     \
 420                                      : "0" ((u32)(arg1)),               \
 421                                        "1" ((u32)(arg2)),               \
 422                                        paravirt_type(__op),             \
 423                                        paravirt_clobber(CLBR_ANY)       \
 424                                      : "memory", "cc");                 \
 425                         __ret = (__rettype)__tmp;                       \
 426                 }                                                       \
 427                 __ret;                                                  \
 428         })
 429 #define PVOP_VCALL2(__op, arg1, arg2)                                   \
 430         ({                                                              \
 431                 unsigned long __eax, __edx, __ecx;                      \
 432                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 433                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 434                              : "0" ((u32)(arg1)),                       \
 435                                "1" ((u32)(arg2)),                       \
 436                                paravirt_type(__op),                     \
 437                                paravirt_clobber(CLBR_ANY)               \
 438                              : "memory", "cc");                         \
 439         })
 440
 441 #define PVOP_CALL3(__rettype, __op, arg1, arg2, arg3)                   \
 442         ({                                                              \
 443                 __rettype __ret;                                        \
 444                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 445                         unsigned long long __tmp;                       \
 446                         unsigned long __ecx;                            \
 447                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 448                                      : "=A" (__tmp), "=c" (__ecx)       \
 449                                      : "a" ((u32)(arg1)),               \
 450                                        "d" ((u32)(arg2)),               \
 451                                        "1" ((u32)(arg3)),               \
 452                                        paravirt_type(__op),             \
 453                                        paravirt_clobber(CLBR_ANY)       \
 454                                      : "memory", "cc");                 \
 455                         __ret = (__rettype)__tmp;                       \
 456                 } else {                                                \
 457                         unsigned long __tmp, __edx, __ecx;      \
 458                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 459                                      : "=a" (__tmp), "=d" (__edx),      \
 460                                        "=c" (__ecx)                     \
 461                                      : "0" ((u32)(arg1)),               \
 462                                        "1" ((u32)(arg2)),               \
 463                                        "2" ((u32)(arg3)),               \
 464                                        paravirt_type(__op),             \
 465                                        paravirt_clobber(CLBR_ANY)       \
 466                                      : "memory", "cc");                 \
 467                         __ret = (__rettype)__tmp;                       \
 468                 }                                                       \
 469                 __ret;                                                  \
 470         })
 471 #define PVOP_VCALL3(__op, arg1, arg2, arg3)                             \
 472         ({                                                              \
 473                 unsigned long __eax, __edx, __ecx;                      \
 474                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 475                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 476                              : "0" ((u32)(arg1)),                       \
 477                                "1" ((u32)(arg2)),                       \
 478                                "2" ((u32)(arg3)),                       \
 479                                paravirt_type(__op),                     \
 480                                paravirt_clobber(CLBR_ANY)               \
 481                              : "memory", "cc");                         \
 482         })
 483
 484 #define PVOP_CALL4(__rettype, __op, arg1, arg2, arg3, arg4)             \
 485         ({                                                              \
 486                 __rettype __ret;                                        \
 487                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 488                         unsigned long long __tmp;                       \
 489                         unsigned long __ecx;                            \
 490                         asm volatile("push %[_arg4]; "                  \
 491                                      paravirt_alt(PARAVIRT_CALL)        \
 492                                      "lea 4(%%esp),%%esp"               \
 493                                      : "=A" (__tmp), "=c" (__ecx)       \
 494                                      : "a" ((u32)(arg1)),               \
 495                                        "d" ((u32)(arg2)),               \
 496                                        "1" ((u32)(arg3)),               \
 497                                        [_arg4] "mr" ((u32)(arg4)),      \
 498                                        paravirt_type(__op),             \
 499                                        paravirt_clobber(CLBR_ANY)       \
 500                                      : "memory", "cc",);                \
 501                         __ret = (__rettype)__tmp;                       \
 502                 } else {                                                \
 503                         unsigned long __tmp, __edx, __ecx;              \
 504                         asm volatile("push %[_arg4]; "                  \
 505                                      paravirt_alt(PARAVIRT_CALL)        \
 506                                      "lea 4(%%esp),%%esp"               \
 507                                      : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
 508                                      : "0" ((u32)(arg1)),               \
 509                                        "1" ((u32)(arg2)),               \
 510                                        "2" ((u32)(arg3)),               \
 511                                        [_arg4]"mr" ((u32)(arg4)),       \
 512                                        paravirt_type(__op),             \
 513                                        paravirt_clobber(CLBR_ANY)       \
 514                                      : "memory", "cc");                 \
 515                         __ret = (__rettype)__tmp;                       \
 516                 }                                                       \
 517                 __ret;                                                  \
 518         })
 519 #define PVOP_VCALL4(__op, arg1, arg2, arg3, arg4)                       \
 520         ({                                                              \
 521                 unsigned long __eax, __edx, __ecx;                      \
 522                 asm volatile("push %[_arg4]; "                          \
 523                              paravirt_alt(PARAVIRT_CALL)                \
 524                              "lea 4(%%esp),%%esp"                       \
 525                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 526                              : "0" ((u32)(arg1)),                       \
 527                                "1" ((u32)(arg2)),                       \
 528                                "2" ((u32)(arg3)),                       \
 529                                [_arg4]"mr" ((u32)(arg4)),               \
 530                                paravirt_type(__op),                     \
 531                                paravirt_clobber(CLBR_ANY)               \
 532                              : "memory", "cc");                         \
 533         })
 534
 535 static inline int paravirt_enabled(void)
 536 {
 537         return paravirt_ops.paravirt_enabled;
 538 }
 539
 540 static inline void load_esp0(struct tss_struct *tss,
 541                              struct thread_struct *thread)
 542 {
 543         PVOP_VCALL2(load_esp0, tss, thread);
 544 }
 545
 546 #define ARCH_SETUP                      paravirt_ops.arch_setup();
 547 static inline unsigned long get_wallclock(void)
 548 {
 549         return PVOP_CALL0(unsigned long, get_wallclock);
 550 }
 551
 552 static inline int set_wallclock(unsigned long nowtime)
 553 {
 554         return PVOP_CALL1(int, set_wallclock, nowtime);
 555 }
 556
 557 static inline void (*choose_time_init(void))(void)
 558 {
 559         return paravirt_ops.time_init;
 560 }
 561
 562 /* The paravirtualized CPUID instruction. */
 563 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 564                            unsigned int *ecx, unsigned int *edx)
 565 {
 566         PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
 567 }
 568
 569 /*
 570  * These special macros can be used to get or set a debugging register
 571  */
 572 static inline unsigned long paravirt_get_debugreg(int reg)
 573 {
 574         return PVOP_CALL1(unsigned long, get_debugreg, reg);
 575 }
 576 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
 577 static inline void set_debugreg(unsigned long val, int reg)
 578 {
 579         PVOP_VCALL2(set_debugreg, reg, val);
 580 }
 581
 582 static inline void clts(void)
 583 {
 584         PVOP_VCALL0(clts);
 585 }
 586
 587 static inline unsigned long read_cr0(void)
 588 {
 589         return PVOP_CALL0(unsigned long, read_cr0);
 590 }
 591
 592 static inline void write_cr0(unsigned long x)
 593 {
 594         PVOP_VCALL1(write_cr0, x);
 595 }
 596
 597 static inline unsigned long read_cr2(void)
 598 {
 599         return PVOP_CALL0(unsigned long, read_cr2);
 600 }
 601
 602 static inline void write_cr2(unsigned long x)
 603 {
 604         PVOP_VCALL1(write_cr2, x);
 605 }
 606
 607 static inline unsigned long read_cr3(void)
 608 {
 609         return PVOP_CALL0(unsigned long, read_cr3);
 610 }
 611
 612 static inline void write_cr3(unsigned long x)
 613 {
 614         PVOP_VCALL1(write_cr3, x);
 615 }
 616
 617 static inline unsigned long read_cr4(void)
 618 {
 619         return PVOP_CALL0(unsigned long, read_cr4);
 620 }
 621 static inline unsigned long read_cr4_safe(void)
 622 {
 623         return PVOP_CALL0(unsigned long, read_cr4_safe);
 624 }
 625
 626 static inline void write_cr4(unsigned long x)
 627 {
 628         PVOP_VCALL1(write_cr4, x);
 629 }
 630
 631 static inline void raw_safe_halt(void)
 632 {
 633         PVOP_VCALL0(safe_halt);
 634 }
 635
 636 static inline void halt(void)
 637 {
 638         PVOP_VCALL0(safe_halt);
 639 }
 640
 641 static inline void wbinvd(void)
 642 {
 643         PVOP_VCALL0(wbinvd);
 644 }
 645
 646 #define get_kernel_rpl()  (paravirt_ops.kernel_rpl)
 647
 648 static inline u64 paravirt_read_msr(unsigned msr, int *err)
 649 {
 650         return PVOP_CALL2(u64, read_msr, msr, err);
 651 }
 652 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
 653 {
 654         return PVOP_CALL3(int, write_msr, msr, low, high);
 655 }
 656
 657 /* These should all do BUG_ON(_err), but our headers are too tangled. */
 658 #define rdmsr(msr,val1,val2) do {               \
 659         int _err;                               \
 660         u64 _l = paravirt_read_msr(msr, &_err); \
 661         val1 = (u32)_l;                         \
 662         val2 = _l >> 32;                        \
 663 } while(0)
 664
 665 #define wrmsr(msr,val1,val2) do {               \
 666         paravirt_write_msr(msr, val1, val2);    \
 667 } while(0)
 668
 669 #define rdmsrl(msr,val) do {                    \
 670         int _err;                               \
 671         val = paravirt_read_msr(msr, &_err);    \
 672 } while(0)
 673
 674 #define wrmsrl(msr,val)         ((void)paravirt_write_msr(msr, val, 0))
 675 #define wrmsr_safe(msr,a,b)     paravirt_write_msr(msr, a, b)
 676
 677 /* rdmsr with exception handling */
 678 #define rdmsr_safe(msr,a,b) ({                  \
 679         int _err;                               \
 680         u64 _l = paravirt_read_msr(msr, &_err); \
 681         (*a) = (u32)_l;                         \
 682         (*b) = _l >> 32;                        \
 683         _err; })
 684
 685
 686 static inline u64 paravirt_read_tsc(void)
 687 {
 688         return PVOP_CALL0(u64, read_tsc);
 689 }
 690 #define rdtsc(low,high) do {                    \
 691         u64 _l = paravirt_read_tsc();           \
 692         low = (u32)_l;                          \
 693         high = _l >> 32;                        \
 694 } while(0)
 695
 696 #define rdtscl(low) do {                        \
 697         u64 _l = paravirt_read_tsc();           \
 698         low = (int)_l;                          \
 699 } while(0)
 700
 701 #define rdtscll(val) (val = paravirt_read_tsc())
 702
 703 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
 704 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
 705
 706 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 707
 708 static inline unsigned long long paravirt_read_pmc(int counter)
 709 {
 710         return PVOP_CALL1(u64, read_pmc, counter);
 711 }
 712
 713 #define rdpmc(counter,low,high) do {            \
 714         u64 _l = paravirt_read_pmc(counter);    \
 715         low = (u32)_l;                          \
 716         high = _l >> 32;                        \
 717 } while(0)
 718
 719 static inline void load_TR_desc(void)
 720 {
 721         PVOP_VCALL0(load_tr_desc);
 722 }
 723 static inline void load_gdt(const struct Xgt_desc_struct *dtr)
 724 {
 725         PVOP_VCALL1(load_gdt, dtr);
 726 }
 727 static inline void load_idt(const struct Xgt_desc_struct *dtr)
 728 {
 729         PVOP_VCALL1(load_idt, dtr);
 730 }
 731 static inline void set_ldt(const void *addr, unsigned entries)
 732 {
 733         PVOP_VCALL2(set_ldt, addr, entries);
 734 }
 735 static inline void store_gdt(struct Xgt_desc_struct *dtr)
 736 {
 737         PVOP_VCALL1(store_gdt, dtr);
 738 }
 739 static inline void store_idt(struct Xgt_desc_struct *dtr)
 740 {
 741         PVOP_VCALL1(store_idt, dtr);
 742 }
 743 static inline unsigned long paravirt_store_tr(void)
 744 {
 745         return PVOP_CALL0(unsigned long, store_tr);
 746 }
 747 #define store_tr(tr)    ((tr) = paravirt_store_tr())
 748 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 749 {
 750         PVOP_VCALL2(load_tls, t, cpu);
 751 }
 752 static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 753 {
 754         PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
 755 }
 756 static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 757 {
 758         PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
 759 }
 760 static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
 761 {
 762         PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
 763 }
 764 static inline void set_iopl_mask(unsigned mask)
 765 {
 766         PVOP_VCALL1(set_iopl_mask, mask);
 767 }
 768
 769 /* The paravirtualized I/O functions */
 770 static inline void slow_down_io(void) {
 771         paravirt_ops.io_delay();
 772 #ifdef REALLY_SLOW_IO
 773         paravirt_ops.io_delay();
 774         paravirt_ops.io_delay();
 775         paravirt_ops.io_delay();
 776 #endif
 777 }
 778
 779 #ifdef CONFIG_X86_LOCAL_APIC
 780 /*
 781  * Basic functions accessing APICs.
 782  */
 783 static inline void apic_write(unsigned long reg, unsigned long v)
 784 {
 785         PVOP_VCALL2(apic_write, reg, v);
 786 }
 787
 788 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
 789 {
 790         PVOP_VCALL2(apic_write_atomic, reg, v);
 791 }
 792
 793 static inline unsigned long apic_read(unsigned long reg)
 794 {
 795         return PVOP_CALL1(unsigned long, apic_read, reg);
 796 }
 797
 798 static inline void setup_boot_clock(void)
 799 {
 800         PVOP_VCALL0(setup_boot_clock);
 801 }
 802
 803 static inline void setup_secondary_clock(void)
 804 {
 805         PVOP_VCALL0(setup_secondary_clock);
 806 }
 807 #endif
 808
 809 static inline void paravirt_pagetable_setup_start(pgd_t *base)
 810 {
 811         if (paravirt_ops.pagetable_setup_start)
 812                 (*paravirt_ops.pagetable_setup_start)(base);
 813 }
 814
 815 static inline void paravirt_pagetable_setup_done(pgd_t *base)
 816 {
 817         if (paravirt_ops.pagetable_setup_done)
 818                 (*paravirt_ops.pagetable_setup_done)(base);
 819 }
 820
 821 #ifdef CONFIG_SMP
 822 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 823                                     unsigned long start_esp)
 824 {
 825         PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
 826 }
 827 #endif
 828
 829 static inline void paravirt_activate_mm(struct mm_struct *prev,
 830                                         struct mm_struct *next)
 831 {
 832         PVOP_VCALL2(activate_mm, prev, next);
 833 }
 834
 835 static inline void arch_dup_mmap(struct mm_struct *oldmm,
 836                                  struct mm_struct *mm)
 837 {
 838         PVOP_VCALL2(dup_mmap, oldmm, mm);
 839 }
 840
 841 static inline void arch_exit_mmap(struct mm_struct *mm)
 842 {
 843         PVOP_VCALL1(exit_mmap, mm);
 844 }
 845
 846 static inline void __flush_tlb(void)
 847 {
 848         PVOP_VCALL0(flush_tlb_user);
 849 }
 850 static inline void __flush_tlb_global(void)
 851 {
 852         PVOP_VCALL0(flush_tlb_kernel);
 853 }
 854 static inline void __flush_tlb_single(unsigned long addr)
 855 {
 856         PVOP_VCALL1(flush_tlb_single, addr);
 857 }
 858
 859 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
 860                                     unsigned long va)
 861 {
 862         PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
 863 }
 864
 865 static inline void paravirt_map_pt_hook(int type, pte_t *va, u32 pfn)
 866 {
 867         PVOP_VCALL3(map_pt_hook, type, va, pfn);
 868 }
 869
 870 static inline void paravirt_alloc_pt(unsigned pfn)
 871 {
 872         PVOP_VCALL1(alloc_pt, pfn);
 873 }
 874 static inline void paravirt_release_pt(unsigned pfn)
 875 {
 876         PVOP_VCALL1(release_pt, pfn);
 877 }
 878
 879 static inline void paravirt_alloc_pd(unsigned pfn)
 880 {
 881         PVOP_VCALL1(alloc_pd, pfn);
 882 }
 883
 884 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
 885                                            unsigned start, unsigned count)
 886 {
 887         PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
 888 }
 889 static inline void paravirt_release_pd(unsigned pfn)
 890 {
 891         PVOP_VCALL1(release_pd, pfn);
 892 }
 893
 894 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
 895                               pte_t *ptep)
 896 {
 897         PVOP_VCALL3(pte_update, mm, addr, ptep);
 898 }
 899
 900 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
 901                                     pte_t *ptep)
 902 {
 903         PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
 904 }
 905
 906 #ifdef CONFIG_X86_PAE
 907 static inline pte_t __pte(unsigned long long val)
 908 {
 909         unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
 910                                             val, val >> 32);
 911         return (pte_t) { ret, ret >> 32 };
 912 }
 913
 914 static inline pmd_t __pmd(unsigned long long val)
 915 {
 916         return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
 917 }
 918
 919 static inline pgd_t __pgd(unsigned long long val)
 920 {
 921         return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
 922 }
 923
 924 static inline unsigned long long pte_val(pte_t x)
 925 {
 926         return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
 927 }
 928
 929 static inline unsigned long long pmd_val(pmd_t x)
 930 {
 931         return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
 932 }
 933
 934 static inline unsigned long long pgd_val(pgd_t x)
 935 {
 936         return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
 937 }
 938
 939 static inline void set_pte(pte_t *ptep, pte_t pteval)
 940 {
 941         PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
 942 }
 943
 944 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 945                               pte_t *ptep, pte_t pteval)
 946 {
 947         /* 5 arg words */
 948         paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
 949 }
 950
 951 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 952 {
 953         PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
 954 }
 955
 956 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
 957                                    pte_t *ptep, pte_t pte)
 958 {
 959         /* 5 arg words */
 960         paravirt_ops.set_pte_present(mm, addr, ptep, pte);
 961 }
 962
 963 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 964 {
 965         PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
 966 }
 967
 968 static inline void set_pud(pud_t *pudp, pud_t pudval)
 969 {
 970         PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
 971 }
 972
 973 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 974 {
 975         PVOP_VCALL3(pte_clear, mm, addr, ptep);
 976 }
 977
 978 static inline void pmd_clear(pmd_t *pmdp)
 979 {
 980         PVOP_VCALL1(pmd_clear, pmdp);
 981 }
 982
 983 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
 984 {
 985         unsigned long long val = PVOP_CALL1(unsigned long long, ptep_get_and_clear, p);
 986         return (pte_t) { val, val >> 32 };
 987 }
 988 #else  /* !CONFIG_X86_PAE */
 989 static inline pte_t __pte(unsigned long val)
 990 {
 991         return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
 992 }
 993
 994 static inline pgd_t __pgd(unsigned long val)
 995 {
 996         return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
 997 }
 998
 999 static inline unsigned long pte_val(pte_t x)
1000 {
1001         return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
1002 }
1003
1004 static inline unsigned long pgd_val(pgd_t x)
1005 {
1006         return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
1007 }
1008
1009 static inline void set_pte(pte_t *ptep, pte_t pteval)
1010 {
1011         PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
1012 }
1013
1014 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
1015                               pte_t *ptep, pte_t pteval)
1016 {
1017         PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
1018 }
1019
1020 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
1021 {
1022         PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
1023 }
1024
1025 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
1026 {
1027         return (pte_t) { PVOP_CALL1(unsigned long, ptep_get_and_clear, p) };
1028 }
1029 #endif  /* CONFIG_X86_PAE */
1030
1031 /* Lazy mode for batching updates / context switch */
1032 #define PARAVIRT_LAZY_NONE 0
1033 #define PARAVIRT_LAZY_MMU  1
1034 #define PARAVIRT_LAZY_CPU  2
1035 #define PARAVIRT_LAZY_FLUSH 3
1036
1037 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
1038 static inline void arch_enter_lazy_cpu_mode(void)
1039 {
1040         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
1041 }
1042
1043 static inline void arch_leave_lazy_cpu_mode(void)
1044 {
1045         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
1046 }
1047
1048 static inline void arch_flush_lazy_cpu_mode(void)
1049 {
1050         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
1051 }
1052
1053
1054 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
1055 static inline void arch_enter_lazy_mmu_mode(void)
1056 {
1057         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
1058 }
1059
1060 static inline void arch_leave_lazy_mmu_mode(void)
1061 {
1062         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
1063 }
1064
1065 static inline void arch_flush_lazy_mmu_mode(void)
1066 {
1067         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
1068 }
1069
1070 void _paravirt_nop(void);
1071 #define paravirt_nop    ((void *)_paravirt_nop)
1072
1073 /* These all sit in the .parainstructions section to tell us what to patch. */
1074 struct paravirt_patch_site {
1075         u8 *instr;              /* original instructions */
1076         u8 instrtype;           /* type of this instruction */
1077         u8 len;                 /* length of original instruction */
1078         u16 clobbers;           /* what registers you may clobber */
1079 };
1080
1081 extern struct paravirt_patch_site __parainstructions[],
1082         __parainstructions_end[];
1083
1084 static inline unsigned long __raw_local_save_flags(void)
1085 {
1086         unsigned long f;
1087
1088         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1089                                   PARAVIRT_CALL
1090                                   "popl %%edx; popl %%ecx")
1091                      : "=a"(f)
1092                      : paravirt_type(save_fl),
1093                        paravirt_clobber(CLBR_EAX)
1094                      : "memory", "cc");
1095         return f;
1096 }
1097
1098 static inline void raw_local_irq_restore(unsigned long f)
1099 {
1100         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1101                                   PARAVIRT_CALL
1102                                   "popl %%edx; popl %%ecx")
1103                      : "=a"(f)
1104                      : "0"(f),
1105                        paravirt_type(restore_fl),
1106                        paravirt_clobber(CLBR_EAX)
1107                      : "memory", "cc");
1108 }
1109
1110 static inline void raw_local_irq_disable(void)
1111 {
1112         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1113                                   PARAVIRT_CALL
1114                                   "popl %%edx; popl %%ecx")
1115                      :
1116                      : paravirt_type(irq_disable),
1117                        paravirt_clobber(CLBR_EAX)
1118                      : "memory", "eax", "cc");
1119 }
1120
1121 static inline void raw_local_irq_enable(void)
1122 {
1123         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1124                                   PARAVIRT_CALL
1125                                   "popl %%edx; popl %%ecx")
1126                      :
1127                      : paravirt_type(irq_enable),
1128                        paravirt_clobber(CLBR_EAX)
1129                      : "memory", "eax", "cc");
1130 }
1131
1132 static inline unsigned long __raw_local_irq_save(void)
1133 {
1134         unsigned long f;
1135
1136         f = __raw_local_save_flags();
1137         raw_local_irq_disable();
1138         return f;
1139 }
1140
1141 #define CLI_STRING                                                      \
1142         _paravirt_alt("pushl %%ecx; pushl %%edx;"                       \
1143                       "call *paravirt_ops+%c[paravirt_cli_type]*4;"     \
1144                       "popl %%edx; popl %%ecx",                         \
1145                       "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1146
1147 #define STI_STRING                                                      \
1148         _paravirt_alt("pushl %%ecx; pushl %%edx;"                       \
1149                       "call *paravirt_ops+%c[paravirt_sti_type]*4;"     \
1150                       "popl %%edx; popl %%ecx",                         \
1151                       "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1152
1153 #define CLI_STI_CLOBBERS , "%eax"
1154 #define CLI_STI_INPUT_ARGS                                              \
1155         ,                                                               \
1156         [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)),          \
1157         [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)),           \
1158         paravirt_clobber(CLBR_EAX)
1159
1160 /* Make sure as little as possible of this mess escapes. */
1161 #undef PARAVIRT_CALL
1162 #undef PVOP_VCALL0
1163 #undef PVOP_CALL0
1164 #undef PVOP_VCALL1
1165 #undef PVOP_CALL1
1166 #undef PVOP_VCALL2
1167 #undef PVOP_CALL2
1168 #undef PVOP_VCALL3
1169 #undef PVOP_CALL3
1170 #undef PVOP_VCALL4
1171 #undef PVOP_CALL4
1172
1173 #else  /* __ASSEMBLY__ */
1174
1175 #define PARA_PATCH(off) ((off) / 4)
1176
1177 #define PARA_SITE(ptype, clobbers, ops)         \
1178 771:;                                           \
1179         ops;                                    \
1180 772:;                                           \
1181         .pushsection .parainstructions,"a";     \
1182          .long 771b;                            \
1183          .byte ptype;                           \
1184          .byte 772b-771b;                       \
1185          .short clobbers;                       \
1186         .popsection
1187
1188 #define INTERRUPT_RETURN                                        \
1189         PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE,         \
1190                   jmp *%cs:paravirt_ops+PARAVIRT_iret)
1191
1192 #define DISABLE_INTERRUPTS(clobbers)                                    \
1193         PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers,           \
1194                   pushl %eax; pushl %ecx; pushl %edx;                   \
1195                   call *%cs:paravirt_ops+PARAVIRT_irq_disable;          \
1196                   popl %edx; popl %ecx; popl %eax)                      \
1197
1198 #define ENABLE_INTERRUPTS(clobbers)                                     \
1199         PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers,            \
1200                   pushl %eax; pushl %ecx; pushl %edx;                   \
1201                   call *%cs:paravirt_ops+PARAVIRT_irq_enable;           \
1202                   popl %edx; popl %ecx; popl %eax)
1203
1204 #define ENABLE_INTERRUPTS_SYSEXIT                                       \
1205         PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE,   \
1206                   jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1207
1208 #define GET_CR0_INTO_EAX                        \
1209         push %ecx; push %edx;                   \
1210         call *paravirt_ops+PARAVIRT_read_cr0;   \
1211         pop %edx; pop %ecx
1212
1213 #endif /* __ASSEMBLY__ */
1214 #endif /* CONFIG_PARAVIRT */
1215 #endif  /* __ASM_PARAVIRT_H */