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
   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
  19 struct thread_struct;
  20 struct Xgt_desc_struct;
  21 struct tss_struct;
  22 struct mm_struct;
  23 struct desc_struct;
  24
  25 /* Lazy mode for batching updates / context switch */
  26 enum paravirt_lazy_mode {
  27         PARAVIRT_LAZY_NONE = 0,
  28         PARAVIRT_LAZY_MMU = 1,
  29         PARAVIRT_LAZY_CPU = 2,
  30 };
  31
  32 struct paravirt_ops
  33 {
  34         unsigned int kernel_rpl;
  35         int shared_kernel_pmd;
  36         int paravirt_enabled;
  37         const char *name;
  38
  39         /*
  40          * Patch may replace one of the defined code sequences with arbitrary
  41          * code, subject to the same register constraints.  This generally
  42          * means the code is not free to clobber any registers other than EAX.
  43          * The patch function should return the number of bytes of code
  44          * generated, as we nop pad the rest in generic code.
  45          */
  46         unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len);
  47
  48         /* Basic arch-specific setup */
  49         void (*arch_setup)(void);
  50         char *(*memory_setup)(void);
  51         void (*init_IRQ)(void);
  52         void (*time_init)(void);
  53
  54         /*
  55          * Called before/after init_mm pagetable setup. setup_start
  56          * may reset %cr3, and may pre-install parts of the pagetable;
  57          * pagetable setup is expected to preserve any existing
  58          * mapping.
  59          */
  60         void (*pagetable_setup_start)(pgd_t *pgd_base);
  61         void (*pagetable_setup_done)(pgd_t *pgd_base);
  62
  63         /* Print a banner to identify the environment */
  64         void (*banner)(void);
  65
  66         /* Set and set time of day */
  67         unsigned long (*get_wallclock)(void);
  68         int (*set_wallclock)(unsigned long);
  69
  70         /* cpuid emulation, mostly so that caps bits can be disabled */
  71         void (*cpuid)(unsigned int *eax, unsigned int *ebx,
  72                       unsigned int *ecx, unsigned int *edx);
  73
  74         /* hooks for various privileged instructions */
  75         unsigned long (*get_debugreg)(int regno);
  76         void (*set_debugreg)(int regno, unsigned long value);
  77
  78         void (*clts)(void);
  79
  80         unsigned long (*read_cr0)(void);
  81         void (*write_cr0)(unsigned long);
  82
  83         unsigned long (*read_cr2)(void);
  84         void (*write_cr2)(unsigned long);
  85
  86         unsigned long (*read_cr3)(void);
  87         void (*write_cr3)(unsigned long);
  88
  89         unsigned long (*read_cr4_safe)(void);
  90         unsigned long (*read_cr4)(void);
  91         void (*write_cr4)(unsigned long);
  92
  93         /*
  94          * Get/set interrupt state.  save_fl and restore_fl are only
  95          * expected to use X86_EFLAGS_IF; all other bits
  96          * returned from save_fl are undefined, and may be ignored by
  97          * restore_fl.
  98          */
  99         unsigned long (*save_fl)(void);
 100         void (*restore_fl)(unsigned long);
 101         void (*irq_disable)(void);
 102         void (*irq_enable)(void);
 103         void (*safe_halt)(void);
 104         void (*halt)(void);
 105
 106         void (*wbinvd)(void);
 107
 108         /* MSR, PMC and TSR operations.
 109            err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
 110         u64 (*read_msr)(unsigned int msr, int *err);
 111         int (*write_msr)(unsigned int msr, u64 val);
 112
 113         u64 (*read_tsc)(void);
 114         u64 (*read_pmc)(void);
 115         u64 (*get_scheduled_cycles)(void);
 116         unsigned long (*get_cpu_khz)(void);
 117
 118         /* Segment descriptor handling */
 119         void (*load_tr_desc)(void);
 120         void (*load_gdt)(const struct Xgt_desc_struct *);
 121         void (*load_idt)(const struct Xgt_desc_struct *);
 122         void (*store_gdt)(struct Xgt_desc_struct *);
 123         void (*store_idt)(struct Xgt_desc_struct *);
 124         void (*set_ldt)(const void *desc, unsigned entries);
 125         unsigned long (*store_tr)(void);
 126         void (*load_tls)(struct thread_struct *t, unsigned int cpu);
 127         void (*write_ldt_entry)(struct desc_struct *,
 128                                 int entrynum, u32 low, u32 high);
 129         void (*write_gdt_entry)(struct desc_struct *,
 130                                 int entrynum, u32 low, u32 high);
 131         void (*write_idt_entry)(struct desc_struct *,
 132                                 int entrynum, u32 low, u32 high);
 133         void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
 134
 135         void (*set_iopl_mask)(unsigned mask);
 136         void (*io_delay)(void);
 137
 138         /*
 139          * Hooks for intercepting the creation/use/destruction of an
 140          * mm_struct.
 141          */
 142         void (*activate_mm)(struct mm_struct *prev,
 143                             struct mm_struct *next);
 144         void (*dup_mmap)(struct mm_struct *oldmm,
 145                          struct mm_struct *mm);
 146         void (*exit_mmap)(struct mm_struct *mm);
 147
 148 #ifdef CONFIG_X86_LOCAL_APIC
 149         /*
 150          * Direct APIC operations, principally for VMI.  Ideally
 151          * these shouldn't be in this interface.
 152          */
 153         void (*apic_write)(unsigned long reg, unsigned long v);
 154         void (*apic_write_atomic)(unsigned long reg, unsigned long v);
 155         unsigned long (*apic_read)(unsigned long reg);
 156         void (*setup_boot_clock)(void);
 157         void (*setup_secondary_clock)(void);
 158
 159         void (*startup_ipi_hook)(int phys_apicid,
 160                                  unsigned long start_eip,
 161                                  unsigned long start_esp);
 162 #endif
 163
 164         /* TLB operations */
 165         void (*flush_tlb_user)(void);
 166         void (*flush_tlb_kernel)(void);
 167         void (*flush_tlb_single)(unsigned long addr);
 168
 169         void (*map_pt_hook)(int type, pte_t *va, u32 pfn);
 170
 171         /* Hooks for allocating/releasing pagetable pages */
 172         void (*alloc_pt)(u32 pfn);
 173         void (*alloc_pd)(u32 pfn);
 174         void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 175         void (*release_pt)(u32 pfn);
 176         void (*release_pd)(u32 pfn);
 177
 178         /* Pagetable manipulation functions */
 179         void (*set_pte)(pte_t *ptep, pte_t pteval);
 180         void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
 181                            pte_t *ptep, pte_t pteval);
 182         void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
 183         void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 184         void (*pte_update_defer)(struct mm_struct *mm,
 185                                  unsigned long addr, pte_t *ptep);
 186
 187         pte_t (*ptep_get_and_clear)(pte_t *ptep);
 188
 189 #ifdef CONFIG_X86_PAE
 190         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 191         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
 192         void (*set_pud)(pud_t *pudp, pud_t pudval);
 193         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 194         void (*pmd_clear)(pmd_t *pmdp);
 195
 196         unsigned long long (*pte_val)(pte_t);
 197         unsigned long long (*pmd_val)(pmd_t);
 198         unsigned long long (*pgd_val)(pgd_t);
 199
 200         pte_t (*make_pte)(unsigned long long pte);
 201         pmd_t (*make_pmd)(unsigned long long pmd);
 202         pgd_t (*make_pgd)(unsigned long long pgd);
 203 #else
 204         unsigned long (*pte_val)(pte_t);
 205         unsigned long (*pgd_val)(pgd_t);
 206
 207         pte_t (*make_pte)(unsigned long pte);
 208         pgd_t (*make_pgd)(unsigned long pgd);
 209 #endif
 210
 211         /* Set deferred update mode, used for batching operations. */
 212         void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
 213
 214         /* These two are jmp to, not actually called. */
 215         void (*irq_enable_sysexit)(void);
 216         void (*iret)(void);
 217 };
 218
 219 /* Mark a paravirt probe function. */
 220 #define paravirt_probe(fn)                                              \
 221  static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
 222                 __attribute__((__section__(".paravirtprobe"))) = fn
 223
 224 extern struct paravirt_ops paravirt_ops;
 225
 226 #define PARAVIRT_PATCH(x)                                       \
 227         (offsetof(struct paravirt_ops, x) / sizeof(void *))
 228
 229 #define paravirt_type(type)                                     \
 230         [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
 231 #define paravirt_clobber(clobber)               \
 232         [paravirt_clobber] "i" (clobber)
 233
 234 /*
 235  * Generate some code, and mark it as patchable by the
 236  * apply_paravirt() alternate instruction patcher.
 237  */
 238 #define _paravirt_alt(insn_string, type, clobber)       \
 239         "771:\n\t" insn_string "\n" "772:\n"            \
 240         ".pushsection .parainstructions,\"a\"\n"        \
 241         "  .long 771b\n"                                \
 242         "  .byte " type "\n"                            \
 243         "  .byte 772b-771b\n"                           \
 244         "  .short " clobber "\n"                        \
 245         ".popsection\n"
 246
 247 /* Generate patchable code, with the default asm parameters. */
 248 #define paravirt_alt(insn_string)                                       \
 249         _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
 250
 251 unsigned paravirt_patch_nop(void);
 252 unsigned paravirt_patch_ignore(unsigned len);
 253 unsigned paravirt_patch_call(void *target, u16 tgt_clobbers,
 254                              void *site, u16 site_clobbers,
 255                              unsigned len);
 256 unsigned paravirt_patch_jmp(void *target, void *site, unsigned len);
 257 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *site, unsigned len);
 258
 259 unsigned paravirt_patch_insns(void *site, unsigned len,
 260                               const char *start, const char *end);
 261
 262
 263 /*
 264  * This generates an indirect call based on the operation type number.
 265  * The type number, computed in PARAVIRT_PATCH, is derived from the
 266  * offset into the paravirt_ops structure, and can therefore be freely
 267  * converted back into a structure offset.
 268  */
 269 #define PARAVIRT_CALL   "call *(paravirt_ops+%c[paravirt_typenum]*4);"
 270
 271 /*
 272  * These macros are intended to wrap calls into a paravirt_ops
 273  * operation, so that they can be later identified and patched at
 274  * runtime.
 275  *
 276  * Normally, a call to a pv_op function is a simple indirect call:
 277  * (paravirt_ops.operations)(args...).
 278  *
 279  * Unfortunately, this is a relatively slow operation for modern CPUs,
 280  * because it cannot necessarily determine what the destination
 281  * address is.  In this case, the address is a runtime constant, so at
 282  * the very least we can patch the call to e a simple direct call, or
 283  * ideally, patch an inline implementation into the callsite.  (Direct
 284  * calls are essentially free, because the call and return addresses
 285  * are completely predictable.)
 286  *
 287  * These macros rely on the standard gcc "regparm(3)" calling
 288  * convention, in which the first three arguments are placed in %eax,
 289  * %edx, %ecx (in that order), and the remaining arguments are placed
 290  * on the stack.  All caller-save registers (eax,edx,ecx) are expected
 291  * to be modified (either clobbered or used for return values).
 292  *
 293  * The call instruction itself is marked by placing its start address
 294  * and size into the .parainstructions section, so that
 295  * apply_paravirt() in arch/i386/kernel/alternative.c can do the
 296  * appropriate patching under the control of the backend paravirt_ops
 297  * implementation.
 298  *
 299  * Unfortunately there's no way to get gcc to generate the args setup
 300  * for the call, and then allow the call itself to be generated by an
 301  * inline asm.  Because of this, we must do the complete arg setup and
 302  * return value handling from within these macros.  This is fairly
 303  * cumbersome.
 304  *
 305  * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
 306  * It could be extended to more arguments, but there would be little
 307  * to be gained from that.  For each number of arguments, there are
 308  * the two VCALL and CALL variants for void and non-void functions.
 309  *
 310  * When there is a return value, the invoker of the macro must specify
 311  * the return type.  The macro then uses sizeof() on that type to
 312  * determine whether its a 32 or 64 bit value, and places the return
 313  * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
 314  * 64-bit).
 315  *
 316  * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
 317  * in low,high order.
 318  *
 319  * Small structures are passed and returned in registers.  The macro
 320  * calling convention can't directly deal with this, so the wrapper
 321  * functions must do this.
 322  *
 323  * These PVOP_* macros are only defined within this header.  This
 324  * means that all uses must be wrapped in inline functions.  This also
 325  * makes sure the incoming and outgoing types are always correct.
 326  */
 327 #define PVOP_CALL0(__rettype, __op)                                     \
 328         ({                                                              \
 329                 __rettype __ret;                                        \
 330                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 331                         unsigned long long __tmp;                       \
 332                         unsigned long __ecx;                            \
 333                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 334                                      : "=A" (__tmp), "=c" (__ecx)       \
 335                                      : paravirt_type(__op),             \
 336                                        paravirt_clobber(CLBR_ANY)       \
 337                                      : "memory", "cc");                 \
 338                         __ret = (__rettype)__tmp;                       \
 339                 } else {                                                \
 340                         unsigned long __tmp, __edx, __ecx;              \
 341                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 342                                      : "=a" (__tmp), "=d" (__edx),      \
 343                                        "=c" (__ecx)                     \
 344                                      : paravirt_type(__op),             \
 345                                        paravirt_clobber(CLBR_ANY)       \
 346                                      : "memory", "cc");                 \
 347                         __ret = (__rettype)__tmp;                       \
 348                 }                                                       \
 349                 __ret;                                                  \
 350         })
 351 #define PVOP_VCALL0(__op)                                               \
 352         ({                                                              \
 353                 unsigned long __eax, __edx, __ecx;                      \
 354                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 355                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 356                              : paravirt_type(__op),                     \
 357                                paravirt_clobber(CLBR_ANY)               \
 358                              : "memory", "cc");                         \
 359         })
 360
 361 #define PVOP_CALL1(__rettype, __op, arg1)                               \
 362         ({                                                              \
 363                 __rettype __ret;                                        \
 364                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 365                         unsigned long long __tmp;                       \
 366                         unsigned long __ecx;                            \
 367                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 368                                      : "=A" (__tmp), "=c" (__ecx)       \
 369                                      : "a" ((u32)(arg1)),               \
 370                                        paravirt_type(__op),             \
 371                                        paravirt_clobber(CLBR_ANY)       \
 372                                      : "memory", "cc");                 \
 373                         __ret = (__rettype)__tmp;                       \
 374                 } else {                                                \
 375                         unsigned long __tmp, __edx, __ecx;              \
 376                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 377                                      : "=a" (__tmp), "=d" (__edx),      \
 378                                        "=c" (__ecx)                     \
 379                                      : "0" ((u32)(arg1)),               \
 380                                        paravirt_type(__op),             \
 381                                        paravirt_clobber(CLBR_ANY)       \
 382                                      : "memory", "cc");                 \
 383                         __ret = (__rettype)__tmp;                       \
 384                 }                                                       \
 385                 __ret;                                                  \
 386         })
 387 #define PVOP_VCALL1(__op, arg1)                                         \
 388         ({                                                              \
 389                 unsigned long __eax, __edx, __ecx;                      \
 390                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 391                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 392                              : "0" ((u32)(arg1)),                       \
 393                                paravirt_type(__op),                     \
 394                                paravirt_clobber(CLBR_ANY)               \
 395                              : "memory", "cc");                         \
 396         })
 397
 398 #define PVOP_CALL2(__rettype, __op, arg1, arg2)                         \
 399         ({                                                              \
 400                 __rettype __ret;                                        \
 401                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 402                         unsigned long long __tmp;                       \
 403                         unsigned long __ecx;                            \
 404                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 405                                      : "=A" (__tmp), "=c" (__ecx)       \
 406                                      : "a" ((u32)(arg1)),               \
 407                                        "d" ((u32)(arg2)),               \
 408                                        paravirt_type(__op),             \
 409                                        paravirt_clobber(CLBR_ANY)       \
 410                                      : "memory", "cc");                 \
 411                         __ret = (__rettype)__tmp;                       \
 412                 } else {                                                \
 413                         unsigned long __tmp, __edx, __ecx;              \
 414                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 415                                      : "=a" (__tmp), "=d" (__edx),      \
 416                                        "=c" (__ecx)                     \
 417                                      : "0" ((u32)(arg1)),               \
 418                                        "1" ((u32)(arg2)),               \
 419                                        paravirt_type(__op),             \
 420                                        paravirt_clobber(CLBR_ANY)       \
 421                                      : "memory", "cc");                 \
 422                         __ret = (__rettype)__tmp;                       \
 423                 }                                                       \
 424                 __ret;                                                  \
 425         })
 426 #define PVOP_VCALL2(__op, arg1, arg2)                                   \
 427         ({                                                              \
 428                 unsigned long __eax, __edx, __ecx;                      \
 429                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 430                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 431                              : "0" ((u32)(arg1)),                       \
 432                                "1" ((u32)(arg2)),                       \
 433                                paravirt_type(__op),                     \
 434                                paravirt_clobber(CLBR_ANY)               \
 435                              : "memory", "cc");                         \
 436         })
 437
 438 #define PVOP_CALL3(__rettype, __op, arg1, arg2, arg3)                   \
 439         ({                                                              \
 440                 __rettype __ret;                                        \
 441                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 442                         unsigned long long __tmp;                       \
 443                         unsigned long __ecx;                            \
 444                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 445                                      : "=A" (__tmp), "=c" (__ecx)       \
 446                                      : "a" ((u32)(arg1)),               \
 447                                        "d" ((u32)(arg2)),               \
 448                                        "1" ((u32)(arg3)),               \
 449                                        paravirt_type(__op),             \
 450                                        paravirt_clobber(CLBR_ANY)       \
 451                                      : "memory", "cc");                 \
 452                         __ret = (__rettype)__tmp;                       \
 453                 } else {                                                \
 454                         unsigned long __tmp, __edx, __ecx;      \
 455                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 456                                      : "=a" (__tmp), "=d" (__edx),      \
 457                                        "=c" (__ecx)                     \
 458                                      : "0" ((u32)(arg1)),               \
 459                                        "1" ((u32)(arg2)),               \
 460                                        "2" ((u32)(arg3)),               \
 461                                        paravirt_type(__op),             \
 462                                        paravirt_clobber(CLBR_ANY)       \
 463                                      : "memory", "cc");                 \
 464                         __ret = (__rettype)__tmp;                       \
 465                 }                                                       \
 466                 __ret;                                                  \
 467         })
 468 #define PVOP_VCALL3(__op, arg1, arg2, arg3)                             \
 469         ({                                                              \
 470                 unsigned long __eax, __edx, __ecx;                      \
 471                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 472                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 473                              : "0" ((u32)(arg1)),                       \
 474                                "1" ((u32)(arg2)),                       \
 475                                "2" ((u32)(arg3)),                       \
 476                                paravirt_type(__op),                     \
 477                                paravirt_clobber(CLBR_ANY)               \
 478                              : "memory", "cc");                         \
 479         })
 480
 481 #define PVOP_CALL4(__rettype, __op, arg1, arg2, arg3, arg4)             \
 482         ({                                                              \
 483                 __rettype __ret;                                        \
 484                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 485                         unsigned long long __tmp;                       \
 486                         unsigned long __ecx;                            \
 487                         asm volatile("push %[_arg4]; "                  \
 488                                      paravirt_alt(PARAVIRT_CALL)        \
 489                                      "lea 4(%%esp),%%esp"               \
 490                                      : "=A" (__tmp), "=c" (__ecx)       \
 491                                      : "a" ((u32)(arg1)),               \
 492                                        "d" ((u32)(arg2)),               \
 493                                        "1" ((u32)(arg3)),               \
 494                                        [_arg4] "mr" ((u32)(arg4)),      \
 495                                        paravirt_type(__op),             \
 496                                        paravirt_clobber(CLBR_ANY)       \
 497                                      : "memory", "cc",);                \
 498                         __ret = (__rettype)__tmp;                       \
 499                 } else {                                                \
 500                         unsigned long __tmp, __edx, __ecx;              \
 501                         asm volatile("push %[_arg4]; "                  \
 502                                      paravirt_alt(PARAVIRT_CALL)        \
 503                                      "lea 4(%%esp),%%esp"               \
 504                                      : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
 505                                      : "0" ((u32)(arg1)),               \
 506                                        "1" ((u32)(arg2)),               \
 507                                        "2" ((u32)(arg3)),               \
 508                                        [_arg4]"mr" ((u32)(arg4)),       \
 509                                        paravirt_type(__op),             \
 510                                        paravirt_clobber(CLBR_ANY)       \
 511                                      : "memory", "cc");                 \
 512                         __ret = (__rettype)__tmp;                       \
 513                 }                                                       \
 514                 __ret;                                                  \
 515         })
 516 #define PVOP_VCALL4(__op, arg1, arg2, arg3, arg4)                       \
 517         ({                                                              \
 518                 unsigned long __eax, __edx, __ecx;                      \
 519                 asm volatile("push %[_arg4]; "                          \
 520                              paravirt_alt(PARAVIRT_CALL)                \
 521                              "lea 4(%%esp),%%esp"                       \
 522                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 523                              : "0" ((u32)(arg1)),                       \
 524                                "1" ((u32)(arg2)),                       \
 525                                "2" ((u32)(arg3)),                       \
 526                                [_arg4]"mr" ((u32)(arg4)),               \
 527                                paravirt_type(__op),                     \
 528                                paravirt_clobber(CLBR_ANY)               \
 529                              : "memory", "cc");                         \
 530         })
 531
 532 static inline int paravirt_enabled(void)
 533 {
 534         return paravirt_ops.paravirt_enabled;
 535 }
 536
 537 static inline void load_esp0(struct tss_struct *tss,
 538                              struct thread_struct *thread)
 539 {
 540         PVOP_VCALL2(load_esp0, tss, thread);
 541 }
 542
 543 #define ARCH_SETUP                      paravirt_ops.arch_setup();
 544 static inline unsigned long get_wallclock(void)
 545 {
 546         return PVOP_CALL0(unsigned long, get_wallclock);
 547 }
 548
 549 static inline int set_wallclock(unsigned long nowtime)
 550 {
 551         return PVOP_CALL1(int, set_wallclock, nowtime);
 552 }
 553
 554 static inline void (*choose_time_init(void))(void)
 555 {
 556         return paravirt_ops.time_init;
 557 }
 558
 559 /* The paravirtualized CPUID instruction. */
 560 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 561                            unsigned int *ecx, unsigned int *edx)
 562 {
 563         PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
 564 }
 565
 566 /*
 567  * These special macros can be used to get or set a debugging register
 568  */
 569 static inline unsigned long paravirt_get_debugreg(int reg)
 570 {
 571         return PVOP_CALL1(unsigned long, get_debugreg, reg);
 572 }
 573 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
 574 static inline void set_debugreg(unsigned long val, int reg)
 575 {
 576         PVOP_VCALL2(set_debugreg, reg, val);
 577 }
 578
 579 static inline void clts(void)
 580 {
 581         PVOP_VCALL0(clts);
 582 }
 583
 584 static inline unsigned long read_cr0(void)
 585 {
 586         return PVOP_CALL0(unsigned long, read_cr0);
 587 }
 588
 589 static inline void write_cr0(unsigned long x)
 590 {
 591         PVOP_VCALL1(write_cr0, x);
 592 }
 593
 594 static inline unsigned long read_cr2(void)
 595 {
 596         return PVOP_CALL0(unsigned long, read_cr2);
 597 }
 598
 599 static inline void write_cr2(unsigned long x)
 600 {
 601         PVOP_VCALL1(write_cr2, x);
 602 }
 603
 604 static inline unsigned long read_cr3(void)
 605 {
 606         return PVOP_CALL0(unsigned long, read_cr3);
 607 }
 608
 609 static inline void write_cr3(unsigned long x)
 610 {
 611         PVOP_VCALL1(write_cr3, x);
 612 }
 613
 614 static inline unsigned long read_cr4(void)
 615 {
 616         return PVOP_CALL0(unsigned long, read_cr4);
 617 }
 618 static inline unsigned long read_cr4_safe(void)
 619 {
 620         return PVOP_CALL0(unsigned long, read_cr4_safe);
 621 }
 622
 623 static inline void write_cr4(unsigned long x)
 624 {
 625         PVOP_VCALL1(write_cr4, x);
 626 }
 627
 628 static inline void raw_safe_halt(void)
 629 {
 630         PVOP_VCALL0(safe_halt);
 631 }
 632
 633 static inline void halt(void)
 634 {
 635         PVOP_VCALL0(safe_halt);
 636 }
 637
 638 static inline void wbinvd(void)
 639 {
 640         PVOP_VCALL0(wbinvd);
 641 }
 642
 643 #define get_kernel_rpl()  (paravirt_ops.kernel_rpl)
 644
 645 static inline u64 paravirt_read_msr(unsigned msr, int *err)
 646 {
 647         return PVOP_CALL2(u64, read_msr, msr, err);
 648 }
 649 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
 650 {
 651         return PVOP_CALL3(int, write_msr, msr, low, high);
 652 }
 653
 654 /* These should all do BUG_ON(_err), but our headers are too tangled. */
 655 #define rdmsr(msr,val1,val2) do {               \
 656         int _err;                               \
 657         u64 _l = paravirt_read_msr(msr, &_err); \
 658         val1 = (u32)_l;                         \
 659         val2 = _l >> 32;                        \
 660 } while(0)
 661
 662 #define wrmsr(msr,val1,val2) do {               \
 663         paravirt_write_msr(msr, val1, val2);    \
 664 } while(0)
 665
 666 #define rdmsrl(msr,val) do {                    \
 667         int _err;                               \
 668         val = paravirt_read_msr(msr, &_err);    \
 669 } while(0)
 670
 671 #define wrmsrl(msr,val)         ((void)paravirt_write_msr(msr, val, 0))
 672 #define wrmsr_safe(msr,a,b)     paravirt_write_msr(msr, a, b)
 673
 674 /* rdmsr with exception handling */
 675 #define rdmsr_safe(msr,a,b) ({                  \
 676         int _err;                               \
 677         u64 _l = paravirt_read_msr(msr, &_err); \
 678         (*a) = (u32)_l;                         \
 679         (*b) = _l >> 32;                        \
 680         _err; })
 681
 682
 683 static inline u64 paravirt_read_tsc(void)
 684 {
 685         return PVOP_CALL0(u64, read_tsc);
 686 }
 687 #define rdtsc(low,high) do {                    \
 688         u64 _l = paravirt_read_tsc();           \
 689         low = (u32)_l;                          \
 690         high = _l >> 32;                        \
 691 } while(0)
 692
 693 #define rdtscl(low) do {                        \
 694         u64 _l = paravirt_read_tsc();           \
 695         low = (int)_l;                          \
 696 } while(0)
 697
 698 #define rdtscll(val) (val = paravirt_read_tsc())
 699
 700 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
 701 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
 702
 703 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 704
 705 static inline unsigned long long paravirt_read_pmc(int counter)
 706 {
 707         return PVOP_CALL1(u64, read_pmc, counter);
 708 }
 709
 710 #define rdpmc(counter,low,high) do {            \
 711         u64 _l = paravirt_read_pmc(counter);    \
 712         low = (u32)_l;                          \
 713         high = _l >> 32;                        \
 714 } while(0)
 715
 716 static inline void load_TR_desc(void)
 717 {
 718         PVOP_VCALL0(load_tr_desc);
 719 }
 720 static inline void load_gdt(const struct Xgt_desc_struct *dtr)
 721 {
 722         PVOP_VCALL1(load_gdt, dtr);
 723 }
 724 static inline void load_idt(const struct Xgt_desc_struct *dtr)
 725 {
 726         PVOP_VCALL1(load_idt, dtr);
 727 }
 728 static inline void set_ldt(const void *addr, unsigned entries)
 729 {
 730         PVOP_VCALL2(set_ldt, addr, entries);
 731 }
 732 static inline void store_gdt(struct Xgt_desc_struct *dtr)
 733 {
 734         PVOP_VCALL1(store_gdt, dtr);
 735 }
 736 static inline void store_idt(struct Xgt_desc_struct *dtr)
 737 {
 738         PVOP_VCALL1(store_idt, dtr);
 739 }
 740 static inline unsigned long paravirt_store_tr(void)
 741 {
 742         return PVOP_CALL0(unsigned long, store_tr);
 743 }
 744 #define store_tr(tr)    ((tr) = paravirt_store_tr())
 745 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 746 {
 747         PVOP_VCALL2(load_tls, t, cpu);
 748 }
 749 static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 750 {
 751         PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
 752 }
 753 static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 754 {
 755         PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
 756 }
 757 static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
 758 {
 759         PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
 760 }
 761 static inline void set_iopl_mask(unsigned mask)
 762 {
 763         PVOP_VCALL1(set_iopl_mask, mask);
 764 }
 765
 766 /* The paravirtualized I/O functions */
 767 static inline void slow_down_io(void) {
 768         paravirt_ops.io_delay();
 769 #ifdef REALLY_SLOW_IO
 770         paravirt_ops.io_delay();
 771         paravirt_ops.io_delay();
 772         paravirt_ops.io_delay();
 773 #endif
 774 }
 775
 776 #ifdef CONFIG_X86_LOCAL_APIC
 777 /*
 778  * Basic functions accessing APICs.
 779  */
 780 static inline void apic_write(unsigned long reg, unsigned long v)
 781 {
 782         PVOP_VCALL2(apic_write, reg, v);
 783 }
 784
 785 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
 786 {
 787         PVOP_VCALL2(apic_write_atomic, reg, v);
 788 }
 789
 790 static inline unsigned long apic_read(unsigned long reg)
 791 {
 792         return PVOP_CALL1(unsigned long, apic_read, reg);
 793 }
 794
 795 static inline void setup_boot_clock(void)
 796 {
 797         PVOP_VCALL0(setup_boot_clock);
 798 }
 799
 800 static inline void setup_secondary_clock(void)
 801 {
 802         PVOP_VCALL0(setup_secondary_clock);
 803 }
 804 #endif
 805
 806 static inline void paravirt_pagetable_setup_start(pgd_t *base)
 807 {
 808         if (paravirt_ops.pagetable_setup_start)
 809                 (*paravirt_ops.pagetable_setup_start)(base);
 810 }
 811
 812 static inline void paravirt_pagetable_setup_done(pgd_t *base)
 813 {
 814         if (paravirt_ops.pagetable_setup_done)
 815                 (*paravirt_ops.pagetable_setup_done)(base);
 816 }
 817
 818 #ifdef CONFIG_SMP
 819 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 820                                     unsigned long start_esp)
 821 {
 822         PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
 823 }
 824 #endif
 825
 826 static inline void paravirt_activate_mm(struct mm_struct *prev,
 827                                         struct mm_struct *next)
 828 {
 829         PVOP_VCALL2(activate_mm, prev, next);
 830 }
 831
 832 static inline void arch_dup_mmap(struct mm_struct *oldmm,
 833                                  struct mm_struct *mm)
 834 {
 835         PVOP_VCALL2(dup_mmap, oldmm, mm);
 836 }
 837
 838 static inline void arch_exit_mmap(struct mm_struct *mm)
 839 {
 840         PVOP_VCALL1(exit_mmap, mm);
 841 }
 842
 843 static inline void __flush_tlb(void)
 844 {
 845         PVOP_VCALL0(flush_tlb_user);
 846 }
 847 static inline void __flush_tlb_global(void)
 848 {
 849         PVOP_VCALL0(flush_tlb_kernel);
 850 }
 851 static inline void __flush_tlb_single(unsigned long addr)
 852 {
 853         PVOP_VCALL1(flush_tlb_single, addr);
 854 }
 855
 856 static inline void paravirt_map_pt_hook(int type, pte_t *va, u32 pfn)
 857 {
 858         PVOP_VCALL3(map_pt_hook, type, va, pfn);
 859 }
 860
 861 static inline void paravirt_alloc_pt(unsigned pfn)
 862 {
 863         PVOP_VCALL1(alloc_pt, pfn);
 864 }
 865 static inline void paravirt_release_pt(unsigned pfn)
 866 {
 867         PVOP_VCALL1(release_pt, pfn);
 868 }
 869
 870 static inline void paravirt_alloc_pd(unsigned pfn)
 871 {
 872         PVOP_VCALL1(alloc_pd, pfn);
 873 }
 874
 875 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
 876                                            unsigned start, unsigned count)
 877 {
 878         PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
 879 }
 880 static inline void paravirt_release_pd(unsigned pfn)
 881 {
 882         PVOP_VCALL1(release_pd, pfn);
 883 }
 884
 885 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
 886                               pte_t *ptep)
 887 {
 888         PVOP_VCALL3(pte_update, mm, addr, ptep);
 889 }
 890
 891 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
 892                                     pte_t *ptep)
 893 {
 894         PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
 895 }
 896
 897 #ifdef CONFIG_X86_PAE
 898 static inline pte_t __pte(unsigned long long val)
 899 {
 900         unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
 901                                             val, val >> 32);
 902         return (pte_t) { ret, ret >> 32 };
 903 }
 904
 905 static inline pmd_t __pmd(unsigned long long val)
 906 {
 907         return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
 908 }
 909
 910 static inline pgd_t __pgd(unsigned long long val)
 911 {
 912         return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
 913 }
 914
 915 static inline unsigned long long pte_val(pte_t x)
 916 {
 917         return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
 918 }
 919
 920 static inline unsigned long long pmd_val(pmd_t x)
 921 {
 922         return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
 923 }
 924
 925 static inline unsigned long long pgd_val(pgd_t x)
 926 {
 927         return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
 928 }
 929
 930 static inline void set_pte(pte_t *ptep, pte_t pteval)
 931 {
 932         PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
 933 }
 934
 935 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 936                               pte_t *ptep, pte_t pteval)
 937 {
 938         /* 5 arg words */
 939         paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
 940 }
 941
 942 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 943 {
 944         PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
 945 }
 946
 947 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
 948                                    pte_t *ptep, pte_t pte)
 949 {
 950         /* 5 arg words */
 951         paravirt_ops.set_pte_present(mm, addr, ptep, pte);
 952 }
 953
 954 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 955 {
 956         PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
 957 }
 958
 959 static inline void set_pud(pud_t *pudp, pud_t pudval)
 960 {
 961         PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
 962 }
 963
 964 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 965 {
 966         PVOP_VCALL3(pte_clear, mm, addr, ptep);
 967 }
 968
 969 static inline void pmd_clear(pmd_t *pmdp)
 970 {
 971         PVOP_VCALL1(pmd_clear, pmdp);
 972 }
 973
 974 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
 975 {
 976         unsigned long long val = PVOP_CALL1(unsigned long long, ptep_get_and_clear, p);
 977         return (pte_t) { val, val >> 32 };
 978 }
 979 #else  /* !CONFIG_X86_PAE */
 980 static inline pte_t __pte(unsigned long val)
 981 {
 982         return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
 983 }
 984
 985 static inline pgd_t __pgd(unsigned long val)
 986 {
 987         return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
 988 }
 989
 990 static inline unsigned long pte_val(pte_t x)
 991 {
 992         return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
 993 }
 994
 995 static inline unsigned long pgd_val(pgd_t x)
 996 {
 997         return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
 998 }
 999
1000 static inline void set_pte(pte_t *ptep, pte_t pteval)
1001 {
1002         PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
1003 }
1004
1005 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
1006                               pte_t *ptep, pte_t pteval)
1007 {
1008         PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
1009 }
1010
1011 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
1012 {
1013         PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
1014 }
1015
1016 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
1017 {
1018         return (pte_t) { PVOP_CALL1(unsigned long, ptep_get_and_clear, p) };
1019 }
1020 #endif  /* CONFIG_X86_PAE */
1021
1022 /* Lazy mode for batching updates / context switch */
1023 #define PARAVIRT_LAZY_NONE 0
1024 #define PARAVIRT_LAZY_MMU  1
1025 #define PARAVIRT_LAZY_CPU  2
1026 #define PARAVIRT_LAZY_FLUSH 3
1027
1028 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
1029 static inline void arch_enter_lazy_cpu_mode(void)
1030 {
1031         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
1032 }
1033
1034 static inline void arch_leave_lazy_cpu_mode(void)
1035 {
1036         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
1037 }
1038
1039 static inline void arch_flush_lazy_cpu_mode(void)
1040 {
1041         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
1042 }
1043
1044
1045 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
1046 static inline void arch_enter_lazy_mmu_mode(void)
1047 {
1048         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
1049 }
1050
1051 static inline void arch_leave_lazy_mmu_mode(void)
1052 {
1053         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
1054 }
1055
1056 static inline void arch_flush_lazy_mmu_mode(void)
1057 {
1058         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
1059 }
1060
1061 void _paravirt_nop(void);
1062 #define paravirt_nop    ((void *)_paravirt_nop)
1063
1064 /* These all sit in the .parainstructions section to tell us what to patch. */
1065 struct paravirt_patch_site {
1066         u8 *instr;              /* original instructions */
1067         u8 instrtype;           /* type of this instruction */
1068         u8 len;                 /* length of original instruction */
1069         u16 clobbers;           /* what registers you may clobber */
1070 };
1071
1072 extern struct paravirt_patch_site __parainstructions[],
1073         __parainstructions_end[];
1074
1075 static inline unsigned long __raw_local_save_flags(void)
1076 {
1077         unsigned long f;
1078
1079         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1080                                   PARAVIRT_CALL
1081                                   "popl %%edx; popl %%ecx")
1082                      : "=a"(f)
1083                      : paravirt_type(save_fl),
1084                        paravirt_clobber(CLBR_EAX)
1085                      : "memory", "cc");
1086         return f;
1087 }
1088
1089 static inline void raw_local_irq_restore(unsigned long f)
1090 {
1091         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1092                                   PARAVIRT_CALL
1093                                   "popl %%edx; popl %%ecx")
1094                      : "=a"(f)
1095                      : "0"(f),
1096                        paravirt_type(restore_fl),
1097                        paravirt_clobber(CLBR_EAX)
1098                      : "memory", "cc");
1099 }
1100
1101 static inline void raw_local_irq_disable(void)
1102 {
1103         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1104                                   PARAVIRT_CALL
1105                                   "popl %%edx; popl %%ecx")
1106                      :
1107                      : paravirt_type(irq_disable),
1108                        paravirt_clobber(CLBR_EAX)
1109                      : "memory", "eax", "cc");
1110 }
1111
1112 static inline void raw_local_irq_enable(void)
1113 {
1114         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1115                                   PARAVIRT_CALL
1116                                   "popl %%edx; popl %%ecx")
1117                      :
1118                      : paravirt_type(irq_enable),
1119                        paravirt_clobber(CLBR_EAX)
1120                      : "memory", "eax", "cc");
1121 }
1122
1123 static inline unsigned long __raw_local_irq_save(void)
1124 {
1125         unsigned long f;
1126
1127         f = __raw_local_save_flags();
1128         raw_local_irq_disable();
1129         return f;
1130 }
1131
1132 #define CLI_STRING                                                      \
1133         _paravirt_alt("pushl %%ecx; pushl %%edx;"                       \
1134                       "call *paravirt_ops+%c[paravirt_cli_type]*4;"     \
1135                       "popl %%edx; popl %%ecx",                         \
1136                       "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1137
1138 #define STI_STRING                                                      \
1139         _paravirt_alt("pushl %%ecx; pushl %%edx;"                       \
1140                       "call *paravirt_ops+%c[paravirt_sti_type]*4;"     \
1141                       "popl %%edx; popl %%ecx",                         \
1142                       "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1143
1144 #define CLI_STI_CLOBBERS , "%eax"
1145 #define CLI_STI_INPUT_ARGS                                              \
1146         ,                                                               \
1147         [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)),          \
1148         [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)),           \
1149         paravirt_clobber(CLBR_EAX)
1150
1151 /* Make sure as little as possible of this mess escapes. */
1152 #undef PARAVIRT_CALL
1153 #undef PVOP_VCALL0
1154 #undef PVOP_CALL0
1155 #undef PVOP_VCALL1
1156 #undef PVOP_CALL1
1157 #undef PVOP_VCALL2
1158 #undef PVOP_CALL2
1159 #undef PVOP_VCALL3
1160 #undef PVOP_CALL3
1161 #undef PVOP_VCALL4
1162 #undef PVOP_CALL4
1163
1164 #else  /* __ASSEMBLY__ */
1165
1166 #define PARA_PATCH(off) ((off) / 4)
1167
1168 #define PARA_SITE(ptype, clobbers, ops)         \
1169 771:;                                           \
1170         ops;                                    \
1171 772:;                                           \
1172         .pushsection .parainstructions,"a";     \
1173          .long 771b;                            \
1174          .byte ptype;                           \
1175          .byte 772b-771b;                       \
1176          .short clobbers;                       \
1177         .popsection
1178
1179 #define INTERRUPT_RETURN                                        \
1180         PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE,         \
1181                   jmp *%cs:paravirt_ops+PARAVIRT_iret)
1182
1183 #define DISABLE_INTERRUPTS(clobbers)                                    \
1184         PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers,           \
1185                   pushl %eax; pushl %ecx; pushl %edx;                   \
1186                   call *%cs:paravirt_ops+PARAVIRT_irq_disable;          \
1187                   popl %edx; popl %ecx; popl %eax)                      \
1188
1189 #define ENABLE_INTERRUPTS(clobbers)                                     \
1190         PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers,            \
1191                   pushl %eax; pushl %ecx; pushl %edx;                   \
1192                   call *%cs:paravirt_ops+PARAVIRT_irq_enable;           \
1193                   popl %edx; popl %ecx; popl %eax)
1194
1195 #define ENABLE_INTERRUPTS_SYSEXIT                                       \
1196         PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE,   \
1197                   jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1198
1199 #define GET_CR0_INTO_EAX                        \
1200         push %ecx; push %edx;                   \
1201         call *paravirt_ops+PARAVIRT_read_cr0;   \
1202         pop %edx; pop %ecx
1203
1204 #endif /* __ASSEMBLY__ */
1205 #endif /* CONFIG_PARAVIRT */
1206 #endif  /* __ASM_PARAVIRT_H */