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 #include <linux/cpumask.h>
  19 #include <asm/kmap_types.h>
  20
  21 struct page;
  22 struct thread_struct;
  23 struct Xgt_desc_struct;
  24 struct tss_struct;
  25 struct mm_struct;
  26 struct desc_struct;
  27
  28 /* Lazy mode for batching updates / context switch */
  29 enum paravirt_lazy_mode {
  30         PARAVIRT_LAZY_NONE = 0,
  31         PARAVIRT_LAZY_MMU = 1,
  32         PARAVIRT_LAZY_CPU = 2,
  33 };
  34
  35 struct paravirt_ops
  36 {
  37         unsigned int kernel_rpl;
  38         int shared_kernel_pmd;
  39         int paravirt_enabled;
  40         const char *name;
  41
  42         /*
  43          * Patch may replace one of the defined code sequences with arbitrary
  44          * code, subject to the same register constraints.  This generally
  45          * means the code is not free to clobber any registers other than EAX.
  46          * The patch function should return the number of bytes of code
  47          * generated, as we nop pad the rest in generic code.
  48          */
  49         unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len);
  50
  51         /* Basic arch-specific setup */
  52         void (*arch_setup)(void);
  53         char *(*memory_setup)(void);
  54         void (*init_IRQ)(void);
  55         void (*time_init)(void);
  56
  57         /*
  58          * Called before/after init_mm pagetable setup. setup_start
  59          * may reset %cr3, and may pre-install parts of the pagetable;
  60          * pagetable setup is expected to preserve any existing
  61          * mapping.
  62          */
  63         void (*pagetable_setup_start)(pgd_t *pgd_base);
  64         void (*pagetable_setup_done)(pgd_t *pgd_base);
  65
  66         /* Print a banner to identify the environment */
  67         void (*banner)(void);
  68
  69         /* Set and set time of day */
  70         unsigned long (*get_wallclock)(void);
  71         int (*set_wallclock)(unsigned long);
  72
  73         /* cpuid emulation, mostly so that caps bits can be disabled */
  74         void (*cpuid)(unsigned int *eax, unsigned int *ebx,
  75                       unsigned int *ecx, unsigned int *edx);
  76
  77         /* hooks for various privileged instructions */
  78         unsigned long (*get_debugreg)(int regno);
  79         void (*set_debugreg)(int regno, unsigned long value);
  80
  81         void (*clts)(void);
  82
  83         unsigned long (*read_cr0)(void);
  84         void (*write_cr0)(unsigned long);
  85
  86         unsigned long (*read_cr2)(void);
  87         void (*write_cr2)(unsigned long);
  88
  89         unsigned long (*read_cr3)(void);
  90         void (*write_cr3)(unsigned long);
  91
  92         unsigned long (*read_cr4_safe)(void);
  93         unsigned long (*read_cr4)(void);
  94         void (*write_cr4)(unsigned long);
  95
  96         /*
  97          * Get/set interrupt state.  save_fl and restore_fl are only
  98          * expected to use X86_EFLAGS_IF; all other bits
  99          * returned from save_fl are undefined, and may be ignored by
 100          * restore_fl.
 101          */
 102         unsigned long (*save_fl)(void);
 103         void (*restore_fl)(unsigned long);
 104         void (*irq_disable)(void);
 105         void (*irq_enable)(void);
 106         void (*safe_halt)(void);
 107         void (*halt)(void);
 108
 109         void (*wbinvd)(void);
 110
 111         /* MSR, PMC and TSR operations.
 112            err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
 113         u64 (*read_msr)(unsigned int msr, int *err);
 114         int (*write_msr)(unsigned int msr, u64 val);
 115
 116         u64 (*read_tsc)(void);
 117         u64 (*read_pmc)(void);
 118         u64 (*get_scheduled_cycles)(void);
 119         unsigned long (*get_cpu_khz)(void);
 120
 121         /* Segment descriptor handling */
 122         void (*load_tr_desc)(void);
 123         void (*load_gdt)(const struct Xgt_desc_struct *);
 124         void (*load_idt)(const struct Xgt_desc_struct *);
 125         void (*store_gdt)(struct Xgt_desc_struct *);
 126         void (*store_idt)(struct Xgt_desc_struct *);
 127         void (*set_ldt)(const void *desc, unsigned entries);
 128         unsigned long (*store_tr)(void);
 129         void (*load_tls)(struct thread_struct *t, unsigned int cpu);
 130         void (*write_ldt_entry)(struct desc_struct *,
 131                                 int entrynum, u32 low, u32 high);
 132         void (*write_gdt_entry)(struct desc_struct *,
 133                                 int entrynum, u32 low, u32 high);
 134         void (*write_idt_entry)(struct desc_struct *,
 135                                 int entrynum, u32 low, u32 high);
 136         void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
 137
 138         void (*set_iopl_mask)(unsigned mask);
 139         void (*io_delay)(void);
 140
 141         /*
 142          * Hooks for intercepting the creation/use/destruction of an
 143          * mm_struct.
 144          */
 145         void (*activate_mm)(struct mm_struct *prev,
 146                             struct mm_struct *next);
 147         void (*dup_mmap)(struct mm_struct *oldmm,
 148                          struct mm_struct *mm);
 149         void (*exit_mmap)(struct mm_struct *mm);
 150
 151 #ifdef CONFIG_X86_LOCAL_APIC
 152         /*
 153          * Direct APIC operations, principally for VMI.  Ideally
 154          * these shouldn't be in this interface.
 155          */
 156         void (*apic_write)(unsigned long reg, unsigned long v);
 157         void (*apic_write_atomic)(unsigned long reg, unsigned long v);
 158         unsigned long (*apic_read)(unsigned long reg);
 159         void (*setup_boot_clock)(void);
 160         void (*setup_secondary_clock)(void);
 161
 162         void (*startup_ipi_hook)(int phys_apicid,
 163                                  unsigned long start_eip,
 164                                  unsigned long start_esp);
 165 #endif
 166
 167         /* TLB operations */
 168         void (*flush_tlb_user)(void);
 169         void (*flush_tlb_kernel)(void);
 170         void (*flush_tlb_single)(unsigned long addr);
 171         void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
 172                                  unsigned long va);
 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_HIGHPTE
 193         void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
 194 #endif
 195
 196 #ifdef CONFIG_X86_PAE
 197         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 198         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
 199         void (*set_pud)(pud_t *pudp, pud_t pudval);
 200         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 201         void (*pmd_clear)(pmd_t *pmdp);
 202
 203         unsigned long long (*pte_val)(pte_t);
 204         unsigned long long (*pmd_val)(pmd_t);
 205         unsigned long long (*pgd_val)(pgd_t);
 206
 207         pte_t (*make_pte)(unsigned long long pte);
 208         pmd_t (*make_pmd)(unsigned long long pmd);
 209         pgd_t (*make_pgd)(unsigned long long pgd);
 210 #else
 211         unsigned long (*pte_val)(pte_t);
 212         unsigned long (*pgd_val)(pgd_t);
 213
 214         pte_t (*make_pte)(unsigned long pte);
 215         pgd_t (*make_pgd)(unsigned long pgd);
 216 #endif
 217
 218         /* Set deferred update mode, used for batching operations. */
 219         void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
 220
 221         /* These two are jmp to, not actually called. */
 222         void (*irq_enable_sysexit)(void);
 223         void (*iret)(void);
 224 };
 225
 226 /* Mark a paravirt probe function. */
 227 #define paravirt_probe(fn)                                              \
 228  static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
 229                 __attribute__((__section__(".paravirtprobe"))) = fn
 230
 231 extern struct paravirt_ops paravirt_ops;
 232
 233 #define PARAVIRT_PATCH(x)                                       \
 234         (offsetof(struct paravirt_ops, x) / sizeof(void *))
 235
 236 #define paravirt_type(type)                                     \
 237         [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
 238 #define paravirt_clobber(clobber)               \
 239         [paravirt_clobber] "i" (clobber)
 240
 241 /*
 242  * Generate some code, and mark it as patchable by the
 243  * apply_paravirt() alternate instruction patcher.
 244  */
 245 #define _paravirt_alt(insn_string, type, clobber)       \
 246         "771:\n\t" insn_string "\n" "772:\n"            \
 247         ".pushsection .parainstructions,\"a\"\n"        \
 248         "  .long 771b\n"                                \
 249         "  .byte " type "\n"                            \
 250         "  .byte 772b-771b\n"                           \
 251         "  .short " clobber "\n"                        \
 252         ".popsection\n"
 253
 254 /* Generate patchable code, with the default asm parameters. */
 255 #define paravirt_alt(insn_string)                                       \
 256         _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
 257
 258 unsigned paravirt_patch_nop(void);
 259 unsigned paravirt_patch_ignore(unsigned len);
 260 unsigned paravirt_patch_call(void *target, u16 tgt_clobbers,
 261                              void *site, u16 site_clobbers,
 262                              unsigned len);
 263 unsigned paravirt_patch_jmp(void *target, void *site, unsigned len);
 264 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *site, unsigned len);
 265
 266 unsigned paravirt_patch_insns(void *site, unsigned len,
 267                               const char *start, const char *end);
 268
 269
 270 /*
 271  * This generates an indirect call based on the operation type number.
 272  * The type number, computed in PARAVIRT_PATCH, is derived from the
 273  * offset into the paravirt_ops structure, and can therefore be freely
 274  * converted back into a structure offset.
 275  */
 276 #define PARAVIRT_CALL   "call *(paravirt_ops+%c[paravirt_typenum]*4);"
 277
 278 /*
 279  * These macros are intended to wrap calls into a paravirt_ops
 280  * operation, so that they can be later identified and patched at
 281  * runtime.
 282  *
 283  * Normally, a call to a pv_op function is a simple indirect call:
 284  * (paravirt_ops.operations)(args...).
 285  *
 286  * Unfortunately, this is a relatively slow operation for modern CPUs,
 287  * because it cannot necessarily determine what the destination
 288  * address is.  In this case, the address is a runtime constant, so at
 289  * the very least we can patch the call to e a simple direct call, or
 290  * ideally, patch an inline implementation into the callsite.  (Direct
 291  * calls are essentially free, because the call and return addresses
 292  * are completely predictable.)
 293  *
 294  * These macros rely on the standard gcc "regparm(3)" calling
 295  * convention, in which the first three arguments are placed in %eax,
 296  * %edx, %ecx (in that order), and the remaining arguments are placed
 297  * on the stack.  All caller-save registers (eax,edx,ecx) are expected
 298  * to be modified (either clobbered or used for return values).
 299  *
 300  * The call instruction itself is marked by placing its start address
 301  * and size into the .parainstructions section, so that
 302  * apply_paravirt() in arch/i386/kernel/alternative.c can do the
 303  * appropriate patching under the control of the backend paravirt_ops
 304  * implementation.
 305  *
 306  * Unfortunately there's no way to get gcc to generate the args setup
 307  * for the call, and then allow the call itself to be generated by an
 308  * inline asm.  Because of this, we must do the complete arg setup and
 309  * return value handling from within these macros.  This is fairly
 310  * cumbersome.
 311  *
 312  * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
 313  * It could be extended to more arguments, but there would be little
 314  * to be gained from that.  For each number of arguments, there are
 315  * the two VCALL and CALL variants for void and non-void functions.
 316  *
 317  * When there is a return value, the invoker of the macro must specify
 318  * the return type.  The macro then uses sizeof() on that type to
 319  * determine whether its a 32 or 64 bit value, and places the return
 320  * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
 321  * 64-bit).
 322  *
 323  * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
 324  * in low,high order.
 325  *
 326  * Small structures are passed and returned in registers.  The macro
 327  * calling convention can't directly deal with this, so the wrapper
 328  * functions must do this.
 329  *
 330  * These PVOP_* macros are only defined within this header.  This
 331  * means that all uses must be wrapped in inline functions.  This also
 332  * makes sure the incoming and outgoing types are always correct.
 333  */
 334 #define PVOP_CALL0(__rettype, __op)                                     \
 335         ({                                                              \
 336                 __rettype __ret;                                        \
 337                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 338                         unsigned long long __tmp;                       \
 339                         unsigned long __ecx;                            \
 340                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 341                                      : "=A" (__tmp), "=c" (__ecx)       \
 342                                      : paravirt_type(__op),             \
 343                                        paravirt_clobber(CLBR_ANY)       \
 344                                      : "memory", "cc");                 \
 345                         __ret = (__rettype)__tmp;                       \
 346                 } else {                                                \
 347                         unsigned long __tmp, __edx, __ecx;              \
 348                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 349                                      : "=a" (__tmp), "=d" (__edx),      \
 350                                        "=c" (__ecx)                     \
 351                                      : paravirt_type(__op),             \
 352                                        paravirt_clobber(CLBR_ANY)       \
 353                                      : "memory", "cc");                 \
 354                         __ret = (__rettype)__tmp;                       \
 355                 }                                                       \
 356                 __ret;                                                  \
 357         })
 358 #define PVOP_VCALL0(__op)                                               \
 359         ({                                                              \
 360                 unsigned long __eax, __edx, __ecx;                      \
 361                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 362                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 363                              : paravirt_type(__op),                     \
 364                                paravirt_clobber(CLBR_ANY)               \
 365                              : "memory", "cc");                         \
 366         })
 367
 368 #define PVOP_CALL1(__rettype, __op, arg1)                               \
 369         ({                                                              \
 370                 __rettype __ret;                                        \
 371                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 372                         unsigned long long __tmp;                       \
 373                         unsigned long __ecx;                            \
 374                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 375                                      : "=A" (__tmp), "=c" (__ecx)       \
 376                                      : "a" ((u32)(arg1)),               \
 377                                        paravirt_type(__op),             \
 378                                        paravirt_clobber(CLBR_ANY)       \
 379                                      : "memory", "cc");                 \
 380                         __ret = (__rettype)__tmp;                       \
 381                 } else {                                                \
 382                         unsigned long __tmp, __edx, __ecx;              \
 383                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 384                                      : "=a" (__tmp), "=d" (__edx),      \
 385                                        "=c" (__ecx)                     \
 386                                      : "0" ((u32)(arg1)),               \
 387                                        paravirt_type(__op),             \
 388                                        paravirt_clobber(CLBR_ANY)       \
 389                                      : "memory", "cc");                 \
 390                         __ret = (__rettype)__tmp;                       \
 391                 }                                                       \
 392                 __ret;                                                  \
 393         })
 394 #define PVOP_VCALL1(__op, arg1)                                         \
 395         ({                                                              \
 396                 unsigned long __eax, __edx, __ecx;                      \
 397                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 398                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 399                              : "0" ((u32)(arg1)),                       \
 400                                paravirt_type(__op),                     \
 401                                paravirt_clobber(CLBR_ANY)               \
 402                              : "memory", "cc");                         \
 403         })
 404
 405 #define PVOP_CALL2(__rettype, __op, arg1, arg2)                         \
 406         ({                                                              \
 407                 __rettype __ret;                                        \
 408                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 409                         unsigned long long __tmp;                       \
 410                         unsigned long __ecx;                            \
 411                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 412                                      : "=A" (__tmp), "=c" (__ecx)       \
 413                                      : "a" ((u32)(arg1)),               \
 414                                        "d" ((u32)(arg2)),               \
 415                                        paravirt_type(__op),             \
 416                                        paravirt_clobber(CLBR_ANY)       \
 417                                      : "memory", "cc");                 \
 418                         __ret = (__rettype)__tmp;                       \
 419                 } else {                                                \
 420                         unsigned long __tmp, __edx, __ecx;              \
 421                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 422                                      : "=a" (__tmp), "=d" (__edx),      \
 423                                        "=c" (__ecx)                     \
 424                                      : "0" ((u32)(arg1)),               \
 425                                        "1" ((u32)(arg2)),               \
 426                                        paravirt_type(__op),             \
 427                                        paravirt_clobber(CLBR_ANY)       \
 428                                      : "memory", "cc");                 \
 429                         __ret = (__rettype)__tmp;                       \
 430                 }                                                       \
 431                 __ret;                                                  \
 432         })
 433 #define PVOP_VCALL2(__op, arg1, arg2)                                   \
 434         ({                                                              \
 435                 unsigned long __eax, __edx, __ecx;                      \
 436                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 437                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 438                              : "0" ((u32)(arg1)),                       \
 439                                "1" ((u32)(arg2)),                       \
 440                                paravirt_type(__op),                     \
 441                                paravirt_clobber(CLBR_ANY)               \
 442                              : "memory", "cc");                         \
 443         })
 444
 445 #define PVOP_CALL3(__rettype, __op, arg1, arg2, arg3)                   \
 446         ({                                                              \
 447                 __rettype __ret;                                        \
 448                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 449                         unsigned long long __tmp;                       \
 450                         unsigned long __ecx;                            \
 451                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 452                                      : "=A" (__tmp), "=c" (__ecx)       \
 453                                      : "a" ((u32)(arg1)),               \
 454                                        "d" ((u32)(arg2)),               \
 455                                        "1" ((u32)(arg3)),               \
 456                                        paravirt_type(__op),             \
 457                                        paravirt_clobber(CLBR_ANY)       \
 458                                      : "memory", "cc");                 \
 459                         __ret = (__rettype)__tmp;                       \
 460                 } else {                                                \
 461                         unsigned long __tmp, __edx, __ecx;      \
 462                         asm volatile(paravirt_alt(PARAVIRT_CALL)        \
 463                                      : "=a" (__tmp), "=d" (__edx),      \
 464                                        "=c" (__ecx)                     \
 465                                      : "0" ((u32)(arg1)),               \
 466                                        "1" ((u32)(arg2)),               \
 467                                        "2" ((u32)(arg3)),               \
 468                                        paravirt_type(__op),             \
 469                                        paravirt_clobber(CLBR_ANY)       \
 470                                      : "memory", "cc");                 \
 471                         __ret = (__rettype)__tmp;                       \
 472                 }                                                       \
 473                 __ret;                                                  \
 474         })
 475 #define PVOP_VCALL3(__op, arg1, arg2, arg3)                             \
 476         ({                                                              \
 477                 unsigned long __eax, __edx, __ecx;                      \
 478                 asm volatile(paravirt_alt(PARAVIRT_CALL)                \
 479                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 480                              : "0" ((u32)(arg1)),                       \
 481                                "1" ((u32)(arg2)),                       \
 482                                "2" ((u32)(arg3)),                       \
 483                                paravirt_type(__op),                     \
 484                                paravirt_clobber(CLBR_ANY)               \
 485                              : "memory", "cc");                         \
 486         })
 487
 488 #define PVOP_CALL4(__rettype, __op, arg1, arg2, arg3, arg4)             \
 489         ({                                                              \
 490                 __rettype __ret;                                        \
 491                 if (sizeof(__rettype) > sizeof(unsigned long)) {        \
 492                         unsigned long long __tmp;                       \
 493                         unsigned long __ecx;                            \
 494                         asm volatile("push %[_arg4]; "                  \
 495                                      paravirt_alt(PARAVIRT_CALL)        \
 496                                      "lea 4(%%esp),%%esp"               \
 497                                      : "=A" (__tmp), "=c" (__ecx)       \
 498                                      : "a" ((u32)(arg1)),               \
 499                                        "d" ((u32)(arg2)),               \
 500                                        "1" ((u32)(arg3)),               \
 501                                        [_arg4] "mr" ((u32)(arg4)),      \
 502                                        paravirt_type(__op),             \
 503                                        paravirt_clobber(CLBR_ANY)       \
 504                                      : "memory", "cc",);                \
 505                         __ret = (__rettype)__tmp;                       \
 506                 } else {                                                \
 507                         unsigned long __tmp, __edx, __ecx;              \
 508                         asm volatile("push %[_arg4]; "                  \
 509                                      paravirt_alt(PARAVIRT_CALL)        \
 510                                      "lea 4(%%esp),%%esp"               \
 511                                      : "=a" (__tmp), "=d" (__edx), "=c" (__ecx) \
 512                                      : "0" ((u32)(arg1)),               \
 513                                        "1" ((u32)(arg2)),               \
 514                                        "2" ((u32)(arg3)),               \
 515                                        [_arg4]"mr" ((u32)(arg4)),       \
 516                                        paravirt_type(__op),             \
 517                                        paravirt_clobber(CLBR_ANY)       \
 518                                      : "memory", "cc");                 \
 519                         __ret = (__rettype)__tmp;                       \
 520                 }                                                       \
 521                 __ret;                                                  \
 522         })
 523 #define PVOP_VCALL4(__op, arg1, arg2, arg3, arg4)                       \
 524         ({                                                              \
 525                 unsigned long __eax, __edx, __ecx;                      \
 526                 asm volatile("push %[_arg4]; "                          \
 527                              paravirt_alt(PARAVIRT_CALL)                \
 528                              "lea 4(%%esp),%%esp"                       \
 529                              : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
 530                              : "0" ((u32)(arg1)),                       \
 531                                "1" ((u32)(arg2)),                       \
 532                                "2" ((u32)(arg3)),                       \
 533                                [_arg4]"mr" ((u32)(arg4)),               \
 534                                paravirt_type(__op),                     \
 535                                paravirt_clobber(CLBR_ANY)               \
 536                              : "memory", "cc");                         \
 537         })
 538
 539 static inline int paravirt_enabled(void)
 540 {
 541         return paravirt_ops.paravirt_enabled;
 542 }
 543
 544 static inline void load_esp0(struct tss_struct *tss,
 545                              struct thread_struct *thread)
 546 {
 547         PVOP_VCALL2(load_esp0, tss, thread);
 548 }
 549
 550 #define ARCH_SETUP                      paravirt_ops.arch_setup();
 551 static inline unsigned long get_wallclock(void)
 552 {
 553         return PVOP_CALL0(unsigned long, get_wallclock);
 554 }
 555
 556 static inline int set_wallclock(unsigned long nowtime)
 557 {
 558         return PVOP_CALL1(int, set_wallclock, nowtime);
 559 }
 560
 561 static inline void (*choose_time_init(void))(void)
 562 {
 563         return paravirt_ops.time_init;
 564 }
 565
 566 /* The paravirtualized CPUID instruction. */
 567 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 568                            unsigned int *ecx, unsigned int *edx)
 569 {
 570         PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
 571 }
 572
 573 /*
 574  * These special macros can be used to get or set a debugging register
 575  */
 576 static inline unsigned long paravirt_get_debugreg(int reg)
 577 {
 578         return PVOP_CALL1(unsigned long, get_debugreg, reg);
 579 }
 580 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
 581 static inline void set_debugreg(unsigned long val, int reg)
 582 {
 583         PVOP_VCALL2(set_debugreg, reg, val);
 584 }
 585
 586 static inline void clts(void)
 587 {
 588         PVOP_VCALL0(clts);
 589 }
 590
 591 static inline unsigned long read_cr0(void)
 592 {
 593         return PVOP_CALL0(unsigned long, read_cr0);
 594 }
 595
 596 static inline void write_cr0(unsigned long x)
 597 {
 598         PVOP_VCALL1(write_cr0, x);
 599 }
 600
 601 static inline unsigned long read_cr2(void)
 602 {
 603         return PVOP_CALL0(unsigned long, read_cr2);
 604 }
 605
 606 static inline void write_cr2(unsigned long x)
 607 {
 608         PVOP_VCALL1(write_cr2, x);
 609 }
 610
 611 static inline unsigned long read_cr3(void)
 612 {
 613         return PVOP_CALL0(unsigned long, read_cr3);
 614 }
 615
 616 static inline void write_cr3(unsigned long x)
 617 {
 618         PVOP_VCALL1(write_cr3, x);
 619 }
 620
 621 static inline unsigned long read_cr4(void)
 622 {
 623         return PVOP_CALL0(unsigned long, read_cr4);
 624 }
 625 static inline unsigned long read_cr4_safe(void)
 626 {
 627         return PVOP_CALL0(unsigned long, read_cr4_safe);
 628 }
 629
 630 static inline void write_cr4(unsigned long x)
 631 {
 632         PVOP_VCALL1(write_cr4, x);
 633 }
 634
 635 static inline void raw_safe_halt(void)
 636 {
 637         PVOP_VCALL0(safe_halt);
 638 }
 639
 640 static inline void halt(void)
 641 {
 642         PVOP_VCALL0(safe_halt);
 643 }
 644
 645 static inline void wbinvd(void)
 646 {
 647         PVOP_VCALL0(wbinvd);
 648 }
 649
 650 #define get_kernel_rpl()  (paravirt_ops.kernel_rpl)
 651
 652 static inline u64 paravirt_read_msr(unsigned msr, int *err)
 653 {
 654         return PVOP_CALL2(u64, read_msr, msr, err);
 655 }
 656 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
 657 {
 658         return PVOP_CALL3(int, write_msr, msr, low, high);
 659 }
 660
 661 /* These should all do BUG_ON(_err), but our headers are too tangled. */
 662 #define rdmsr(msr,val1,val2) do {               \
 663         int _err;                               \
 664         u64 _l = paravirt_read_msr(msr, &_err); \
 665         val1 = (u32)_l;                         \
 666         val2 = _l >> 32;                        \
 667 } while(0)
 668
 669 #define wrmsr(msr,val1,val2) do {               \
 670         paravirt_write_msr(msr, val1, val2);    \
 671 } while(0)
 672
 673 #define rdmsrl(msr,val) do {                    \
 674         int _err;                               \
 675         val = paravirt_read_msr(msr, &_err);    \
 676 } while(0)
 677
 678 #define wrmsrl(msr,val)         ((void)paravirt_write_msr(msr, val, 0))
 679 #define wrmsr_safe(msr,a,b)     paravirt_write_msr(msr, a, b)
 680
 681 /* rdmsr with exception handling */
 682 #define rdmsr_safe(msr,a,b) ({                  \
 683         int _err;                               \
 684         u64 _l = paravirt_read_msr(msr, &_err); \
 685         (*a) = (u32)_l;                         \
 686         (*b) = _l >> 32;                        \
 687         _err; })
 688
 689
 690 static inline u64 paravirt_read_tsc(void)
 691 {
 692         return PVOP_CALL0(u64, read_tsc);
 693 }
 694 #define rdtsc(low,high) do {                    \
 695         u64 _l = paravirt_read_tsc();           \
 696         low = (u32)_l;                          \
 697         high = _l >> 32;                        \
 698 } while(0)
 699
 700 #define rdtscl(low) do {                        \
 701         u64 _l = paravirt_read_tsc();           \
 702         low = (int)_l;                          \
 703 } while(0)
 704
 705 #define rdtscll(val) (val = paravirt_read_tsc())
 706
 707 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
 708 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
 709
 710 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 711
 712 static inline unsigned long long paravirt_read_pmc(int counter)
 713 {
 714         return PVOP_CALL1(u64, read_pmc, counter);
 715 }
 716
 717 #define rdpmc(counter,low,high) do {            \
 718         u64 _l = paravirt_read_pmc(counter);    \
 719         low = (u32)_l;                          \
 720         high = _l >> 32;                        \
 721 } while(0)
 722
 723 static inline void load_TR_desc(void)
 724 {
 725         PVOP_VCALL0(load_tr_desc);
 726 }
 727 static inline void load_gdt(const struct Xgt_desc_struct *dtr)
 728 {
 729         PVOP_VCALL1(load_gdt, dtr);
 730 }
 731 static inline void load_idt(const struct Xgt_desc_struct *dtr)
 732 {
 733         PVOP_VCALL1(load_idt, dtr);
 734 }
 735 static inline void set_ldt(const void *addr, unsigned entries)
 736 {
 737         PVOP_VCALL2(set_ldt, addr, entries);
 738 }
 739 static inline void store_gdt(struct Xgt_desc_struct *dtr)
 740 {
 741         PVOP_VCALL1(store_gdt, dtr);
 742 }
 743 static inline void store_idt(struct Xgt_desc_struct *dtr)
 744 {
 745         PVOP_VCALL1(store_idt, dtr);
 746 }
 747 static inline unsigned long paravirt_store_tr(void)
 748 {
 749         return PVOP_CALL0(unsigned long, store_tr);
 750 }
 751 #define store_tr(tr)    ((tr) = paravirt_store_tr())
 752 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 753 {
 754         PVOP_VCALL2(load_tls, t, cpu);
 755 }
 756 static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 757 {
 758         PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
 759 }
 760 static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 761 {
 762         PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
 763 }
 764 static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
 765 {
 766         PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
 767 }
 768 static inline void set_iopl_mask(unsigned mask)
 769 {
 770         PVOP_VCALL1(set_iopl_mask, mask);
 771 }
 772
 773 /* The paravirtualized I/O functions */
 774 static inline void slow_down_io(void) {
 775         paravirt_ops.io_delay();
 776 #ifdef REALLY_SLOW_IO
 777         paravirt_ops.io_delay();
 778         paravirt_ops.io_delay();
 779         paravirt_ops.io_delay();
 780 #endif
 781 }
 782
 783 #ifdef CONFIG_X86_LOCAL_APIC
 784 /*
 785  * Basic functions accessing APICs.
 786  */
 787 static inline void apic_write(unsigned long reg, unsigned long v)
 788 {
 789         PVOP_VCALL2(apic_write, reg, v);
 790 }
 791
 792 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
 793 {
 794         PVOP_VCALL2(apic_write_atomic, reg, v);
 795 }
 796
 797 static inline unsigned long apic_read(unsigned long reg)
 798 {
 799         return PVOP_CALL1(unsigned long, apic_read, reg);
 800 }
 801
 802 static inline void setup_boot_clock(void)
 803 {
 804         PVOP_VCALL0(setup_boot_clock);
 805 }
 806
 807 static inline void setup_secondary_clock(void)
 808 {
 809         PVOP_VCALL0(setup_secondary_clock);
 810 }
 811 #endif
 812
 813 static inline void paravirt_pagetable_setup_start(pgd_t *base)
 814 {
 815         if (paravirt_ops.pagetable_setup_start)
 816                 (*paravirt_ops.pagetable_setup_start)(base);
 817 }
 818
 819 static inline void paravirt_pagetable_setup_done(pgd_t *base)
 820 {
 821         if (paravirt_ops.pagetable_setup_done)
 822                 (*paravirt_ops.pagetable_setup_done)(base);
 823 }
 824
 825 #ifdef CONFIG_SMP
 826 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 827                                     unsigned long start_esp)
 828 {
 829         PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
 830 }
 831 #endif
 832
 833 static inline void paravirt_activate_mm(struct mm_struct *prev,
 834                                         struct mm_struct *next)
 835 {
 836         PVOP_VCALL2(activate_mm, prev, next);
 837 }
 838
 839 static inline void arch_dup_mmap(struct mm_struct *oldmm,
 840                                  struct mm_struct *mm)
 841 {
 842         PVOP_VCALL2(dup_mmap, oldmm, mm);
 843 }
 844
 845 static inline void arch_exit_mmap(struct mm_struct *mm)
 846 {
 847         PVOP_VCALL1(exit_mmap, mm);
 848 }
 849
 850 static inline void __flush_tlb(void)
 851 {
 852         PVOP_VCALL0(flush_tlb_user);
 853 }
 854 static inline void __flush_tlb_global(void)
 855 {
 856         PVOP_VCALL0(flush_tlb_kernel);
 857 }
 858 static inline void __flush_tlb_single(unsigned long addr)
 859 {
 860         PVOP_VCALL1(flush_tlb_single, addr);
 861 }
 862
 863 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
 864                                     unsigned long va)
 865 {
 866         PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
 867 }
 868
 869 static inline void paravirt_alloc_pt(unsigned pfn)
 870 {
 871         PVOP_VCALL1(alloc_pt, pfn);
 872 }
 873 static inline void paravirt_release_pt(unsigned pfn)
 874 {
 875         PVOP_VCALL1(release_pt, pfn);
 876 }
 877
 878 static inline void paravirt_alloc_pd(unsigned pfn)
 879 {
 880         PVOP_VCALL1(alloc_pd, pfn);
 881 }
 882
 883 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
 884                                            unsigned start, unsigned count)
 885 {
 886         PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
 887 }
 888 static inline void paravirt_release_pd(unsigned pfn)
 889 {
 890         PVOP_VCALL1(release_pd, pfn);
 891 }
 892
 893 #ifdef CONFIG_HIGHPTE
 894 static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
 895 {
 896         unsigned long ret;
 897         ret = PVOP_CALL2(unsigned long, kmap_atomic_pte, page, type);
 898         return (void *)ret;
 899 }
 900 #endif
 901
 902 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
 903                               pte_t *ptep)
 904 {
 905         PVOP_VCALL3(pte_update, mm, addr, ptep);
 906 }
 907
 908 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
 909                                     pte_t *ptep)
 910 {
 911         PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
 912 }
 913
 914 #ifdef CONFIG_X86_PAE
 915 static inline pte_t __pte(unsigned long long val)
 916 {
 917         unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
 918                                             val, val >> 32);
 919         return (pte_t) { ret, ret >> 32 };
 920 }
 921
 922 static inline pmd_t __pmd(unsigned long long val)
 923 {
 924         return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
 925 }
 926
 927 static inline pgd_t __pgd(unsigned long long val)
 928 {
 929         return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
 930 }
 931
 932 static inline unsigned long long pte_val(pte_t x)
 933 {
 934         return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
 935 }
 936
 937 static inline unsigned long long pmd_val(pmd_t x)
 938 {
 939         return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
 940 }
 941
 942 static inline unsigned long long pgd_val(pgd_t x)
 943 {
 944         return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
 945 }
 946
 947 static inline void set_pte(pte_t *ptep, pte_t pteval)
 948 {
 949         PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
 950 }
 951
 952 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 953                               pte_t *ptep, pte_t pteval)
 954 {
 955         /* 5 arg words */
 956         paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
 957 }
 958
 959 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 960 {
 961         PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
 962 }
 963
 964 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
 965                                    pte_t *ptep, pte_t pte)
 966 {
 967         /* 5 arg words */
 968         paravirt_ops.set_pte_present(mm, addr, ptep, pte);
 969 }
 970
 971 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 972 {
 973         PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
 974 }
 975
 976 static inline void set_pud(pud_t *pudp, pud_t pudval)
 977 {
 978         PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
 979 }
 980
 981 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 982 {
 983         PVOP_VCALL3(pte_clear, mm, addr, ptep);
 984 }
 985
 986 static inline void pmd_clear(pmd_t *pmdp)
 987 {
 988         PVOP_VCALL1(pmd_clear, pmdp);
 989 }
 990
 991 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
 992 {
 993         unsigned long long val = PVOP_CALL1(unsigned long long, ptep_get_and_clear, p);
 994         return (pte_t) { val, val >> 32 };
 995 }
 996 #else  /* !CONFIG_X86_PAE */
 997 static inline pte_t __pte(unsigned long val)
 998 {
 999         return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
1000 }
1001
1002 static inline pgd_t __pgd(unsigned long val)
1003 {
1004         return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
1005 }
1006
1007 static inline unsigned long pte_val(pte_t x)
1008 {
1009         return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
1010 }
1011
1012 static inline unsigned long pgd_val(pgd_t x)
1013 {
1014         return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
1015 }
1016
1017 static inline void set_pte(pte_t *ptep, pte_t pteval)
1018 {
1019         PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
1020 }
1021
1022 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
1023                               pte_t *ptep, pte_t pteval)
1024 {
1025         PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
1026 }
1027
1028 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
1029 {
1030         PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
1031 }
1032
1033 static inline pte_t raw_ptep_get_and_clear(pte_t *p)
1034 {
1035         return (pte_t) { PVOP_CALL1(unsigned long, ptep_get_and_clear, p) };
1036 }
1037 #endif  /* CONFIG_X86_PAE */
1038
1039 /* Lazy mode for batching updates / context switch */
1040 #define PARAVIRT_LAZY_NONE 0
1041 #define PARAVIRT_LAZY_MMU  1
1042 #define PARAVIRT_LAZY_CPU  2
1043 #define PARAVIRT_LAZY_FLUSH 3
1044
1045 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
1046 static inline void arch_enter_lazy_cpu_mode(void)
1047 {
1048         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
1049 }
1050
1051 static inline void arch_leave_lazy_cpu_mode(void)
1052 {
1053         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
1054 }
1055
1056 static inline void arch_flush_lazy_cpu_mode(void)
1057 {
1058         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
1059 }
1060
1061
1062 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
1063 static inline void arch_enter_lazy_mmu_mode(void)
1064 {
1065         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
1066 }
1067
1068 static inline void arch_leave_lazy_mmu_mode(void)
1069 {
1070         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
1071 }
1072
1073 static inline void arch_flush_lazy_mmu_mode(void)
1074 {
1075         PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
1076 }
1077
1078 void _paravirt_nop(void);
1079 #define paravirt_nop    ((void *)_paravirt_nop)
1080
1081 /* These all sit in the .parainstructions section to tell us what to patch. */
1082 struct paravirt_patch_site {
1083         u8 *instr;              /* original instructions */
1084         u8 instrtype;           /* type of this instruction */
1085         u8 len;                 /* length of original instruction */
1086         u16 clobbers;           /* what registers you may clobber */
1087 };
1088
1089 extern struct paravirt_patch_site __parainstructions[],
1090         __parainstructions_end[];
1091
1092 static inline unsigned long __raw_local_save_flags(void)
1093 {
1094         unsigned long f;
1095
1096         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1097                                   PARAVIRT_CALL
1098                                   "popl %%edx; popl %%ecx")
1099                      : "=a"(f)
1100                      : paravirt_type(save_fl),
1101                        paravirt_clobber(CLBR_EAX)
1102                      : "memory", "cc");
1103         return f;
1104 }
1105
1106 static inline void raw_local_irq_restore(unsigned long f)
1107 {
1108         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1109                                   PARAVIRT_CALL
1110                                   "popl %%edx; popl %%ecx")
1111                      : "=a"(f)
1112                      : "0"(f),
1113                        paravirt_type(restore_fl),
1114                        paravirt_clobber(CLBR_EAX)
1115                      : "memory", "cc");
1116 }
1117
1118 static inline void raw_local_irq_disable(void)
1119 {
1120         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1121                                   PARAVIRT_CALL
1122                                   "popl %%edx; popl %%ecx")
1123                      :
1124                      : paravirt_type(irq_disable),
1125                        paravirt_clobber(CLBR_EAX)
1126                      : "memory", "eax", "cc");
1127 }
1128
1129 static inline void raw_local_irq_enable(void)
1130 {
1131         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1132                                   PARAVIRT_CALL
1133                                   "popl %%edx; popl %%ecx")
1134                      :
1135                      : paravirt_type(irq_enable),
1136                        paravirt_clobber(CLBR_EAX)
1137                      : "memory", "eax", "cc");
1138 }
1139
1140 static inline unsigned long __raw_local_irq_save(void)
1141 {
1142         unsigned long f;
1143
1144         f = __raw_local_save_flags();
1145         raw_local_irq_disable();
1146         return f;
1147 }
1148
1149 #define CLI_STRING                                                      \
1150         _paravirt_alt("pushl %%ecx; pushl %%edx;"                       \
1151                       "call *paravirt_ops+%c[paravirt_cli_type]*4;"     \
1152                       "popl %%edx; popl %%ecx",                         \
1153                       "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1154
1155 #define STI_STRING                                                      \
1156         _paravirt_alt("pushl %%ecx; pushl %%edx;"                       \
1157                       "call *paravirt_ops+%c[paravirt_sti_type]*4;"     \
1158                       "popl %%edx; popl %%ecx",                         \
1159                       "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1160
1161 #define CLI_STI_CLOBBERS , "%eax"
1162 #define CLI_STI_INPUT_ARGS                                              \
1163         ,                                                               \
1164         [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)),          \
1165         [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)),           \
1166         paravirt_clobber(CLBR_EAX)
1167
1168 /* Make sure as little as possible of this mess escapes. */
1169 #undef PARAVIRT_CALL
1170 #undef PVOP_VCALL0
1171 #undef PVOP_CALL0
1172 #undef PVOP_VCALL1
1173 #undef PVOP_CALL1
1174 #undef PVOP_VCALL2
1175 #undef PVOP_CALL2
1176 #undef PVOP_VCALL3
1177 #undef PVOP_CALL3
1178 #undef PVOP_VCALL4
1179 #undef PVOP_CALL4
1180
1181 #else  /* __ASSEMBLY__ */
1182
1183 #define PARA_PATCH(off) ((off) / 4)
1184
1185 #define PARA_SITE(ptype, clobbers, ops)         \
1186 771:;                                           \
1187         ops;                                    \
1188 772:;                                           \
1189         .pushsection .parainstructions,"a";     \
1190          .long 771b;                            \
1191          .byte ptype;                           \
1192          .byte 772b-771b;                       \
1193          .short clobbers;                       \
1194         .popsection
1195
1196 #define INTERRUPT_RETURN                                        \
1197         PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE,         \
1198                   jmp *%cs:paravirt_ops+PARAVIRT_iret)
1199
1200 #define DISABLE_INTERRUPTS(clobbers)                                    \
1201         PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers,           \
1202                   pushl %eax; pushl %ecx; pushl %edx;                   \
1203                   call *%cs:paravirt_ops+PARAVIRT_irq_disable;          \
1204                   popl %edx; popl %ecx; popl %eax)                      \
1205
1206 #define ENABLE_INTERRUPTS(clobbers)                                     \
1207         PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers,            \
1208                   pushl %eax; pushl %ecx; pushl %edx;                   \
1209                   call *%cs:paravirt_ops+PARAVIRT_irq_enable;           \
1210                   popl %edx; popl %ecx; popl %eax)
1211
1212 #define ENABLE_INTERRUPTS_SYSEXIT                                       \
1213         PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE,   \
1214                   jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1215
1216 #define GET_CR0_INTO_EAX                        \
1217         push %ecx; push %edx;                   \
1218         call *paravirt_ops+PARAVIRT_read_cr0;   \
1219         pop %edx; pop %ecx
1220
1221 #endif /* __ASSEMBLY__ */
1222 #endif /* CONFIG_PARAVIRT */
1223 #endif  /* __ASM_PARAVIRT_H */