include/asm-x86/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 #include <asm/desc_defs.h>
  21
  22 struct page;
  23 struct thread_struct;
  24 struct desc_ptr;
  25 struct tss_struct;
  26 struct mm_struct;
  27 struct desc_struct;
  28
  29 /* general info */
  30 struct pv_info {
  31         unsigned int kernel_rpl;
  32         int shared_kernel_pmd;
  33         int paravirt_enabled;
  34         const char *name;
  35 };
  36
  37 struct pv_init_ops {
  38         /*
  39          * Patch may replace one of the defined code sequences with
  40          * arbitrary code, subject to the same register constraints.
  41          * This generally means the code is not free to clobber any
  42          * registers other than EAX.  The patch function should return
  43          * the number of bytes of code generated, as we nop pad the
  44          * rest in generic code.
  45          */
  46         unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
  47                           unsigned long addr, unsigned len);
  48
  49         /* Basic arch-specific setup */
  50         void (*arch_setup)(void);
  51         char *(*memory_setup)(void);
  52         void (*post_allocator_init)(void);
  53
  54         /* Print a banner to identify the environment */
  55         void (*banner)(void);
  56 };
  57
  58
  59 struct pv_lazy_ops {
  60         /* Set deferred update mode, used for batching operations. */
  61         void (*enter)(void);
  62         void (*leave)(void);
  63 };
  64
  65 struct pv_time_ops {
  66         void (*time_init)(void);
  67
  68         /* Set and set time of day */
  69         unsigned long (*get_wallclock)(void);
  70         int (*set_wallclock)(unsigned long);
  71
  72         unsigned long long (*sched_clock)(void);
  73         unsigned long (*get_cpu_khz)(void);
  74 };
  75
  76 struct pv_cpu_ops {
  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_cr4_safe)(void);
  87         unsigned long (*read_cr4)(void);
  88         void (*write_cr4)(unsigned long);
  89
  90         /* Segment descriptor handling */
  91         void (*load_tr_desc)(void);
  92         void (*load_gdt)(const struct desc_ptr *);
  93         void (*load_idt)(const struct desc_ptr *);
  94         void (*store_gdt)(struct desc_ptr *);
  95         void (*store_idt)(struct desc_ptr *);
  96         void (*set_ldt)(const void *desc, unsigned entries);
  97         unsigned long (*store_tr)(void);
  98         void (*load_tls)(struct thread_struct *t, unsigned int cpu);
  99         void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
 100                                 const void *desc);
 101         void (*write_gdt_entry)(struct desc_struct *,
 102                                 int entrynum, const void *desc, int size);
 103         void (*write_idt_entry)(gate_desc *,
 104                                 int entrynum, const gate_desc *gate);
 105         void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 106
 107         void (*set_iopl_mask)(unsigned mask);
 108
 109         void (*wbinvd)(void);
 110         void (*io_delay)(void);
 111
 112         /* cpuid emulation, mostly so that caps bits can be disabled */
 113         void (*cpuid)(unsigned int *eax, unsigned int *ebx,
 114                       unsigned int *ecx, unsigned int *edx);
 115
 116         /* MSR, PMC and TSR operations.
 117            err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
 118         u64 (*read_msr)(unsigned int msr, int *err);
 119         int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
 120
 121         u64 (*read_tsc)(void);
 122         u64 (*read_pmc)(int counter);
 123         unsigned long long (*read_tscp)(unsigned int *aux);
 124
 125         /* These two are jmp to, not actually called. */
 126         void (*irq_enable_syscall_ret)(void);
 127         void (*iret)(void);
 128
 129         struct pv_lazy_ops lazy_mode;
 130 };
 131
 132 struct pv_irq_ops {
 133         void (*init_IRQ)(void);
 134
 135         /*
 136          * Get/set interrupt state.  save_fl and restore_fl are only
 137          * expected to use X86_EFLAGS_IF; all other bits
 138          * returned from save_fl are undefined, and may be ignored by
 139          * restore_fl.
 140          */
 141         unsigned long (*save_fl)(void);
 142         void (*restore_fl)(unsigned long);
 143         void (*irq_disable)(void);
 144         void (*irq_enable)(void);
 145         void (*safe_halt)(void);
 146         void (*halt)(void);
 147 };
 148
 149 struct pv_apic_ops {
 150 #ifdef CONFIG_X86_LOCAL_APIC
 151         /*
 152          * Direct APIC operations, principally for VMI.  Ideally
 153          * these shouldn't be in this interface.
 154          */
 155         void (*apic_write)(unsigned long reg, u32 v);
 156         void (*apic_write_atomic)(unsigned long reg, u32 v);
 157         u32 (*apic_read)(unsigned long reg);
 158         void (*setup_boot_clock)(void);
 159         void (*setup_secondary_clock)(void);
 160
 161         void (*startup_ipi_hook)(int phys_apicid,
 162                                  unsigned long start_eip,
 163                                  unsigned long start_esp);
 164 #endif
 165 };
 166
 167 struct pv_mmu_ops {
 168         /*
 169          * Called before/after init_mm pagetable setup. setup_start
 170          * may reset %cr3, and may pre-install parts of the pagetable;
 171          * pagetable setup is expected to preserve any existing
 172          * mapping.
 173          */
 174         void (*pagetable_setup_start)(pgd_t *pgd_base);
 175         void (*pagetable_setup_done)(pgd_t *pgd_base);
 176
 177         unsigned long (*read_cr2)(void);
 178         void (*write_cr2)(unsigned long);
 179
 180         unsigned long (*read_cr3)(void);
 181         void (*write_cr3)(unsigned long);
 182
 183         /*
 184          * Hooks for intercepting the creation/use/destruction of an
 185          * mm_struct.
 186          */
 187         void (*activate_mm)(struct mm_struct *prev,
 188                             struct mm_struct *next);
 189         void (*dup_mmap)(struct mm_struct *oldmm,
 190                          struct mm_struct *mm);
 191         void (*exit_mmap)(struct mm_struct *mm);
 192
 193
 194         /* TLB operations */
 195         void (*flush_tlb_user)(void);
 196         void (*flush_tlb_kernel)(void);
 197         void (*flush_tlb_single)(unsigned long addr);
 198         void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
 199                                  unsigned long va);
 200
 201         /* Hooks for allocating/releasing pagetable pages */
 202         void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
 203         void (*alloc_pd)(u32 pfn);
 204         void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 205         void (*release_pt)(u32 pfn);
 206         void (*release_pd)(u32 pfn);
 207
 208         /* Pagetable manipulation functions */
 209         void (*set_pte)(pte_t *ptep, pte_t pteval);
 210         void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
 211                            pte_t *ptep, pte_t pteval);
 212         void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
 213         void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 214         void (*pte_update_defer)(struct mm_struct *mm,
 215                                  unsigned long addr, pte_t *ptep);
 216
 217 #ifdef CONFIG_X86_PAE
 218         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 219         void (*set_pte_present)(struct mm_struct *mm, unsigned long addr,
 220                                 pte_t *ptep, pte_t pte);
 221         void (*set_pud)(pud_t *pudp, pud_t pudval);
 222         void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 223         void (*pmd_clear)(pmd_t *pmdp);
 224
 225         unsigned long long (*pte_val)(pte_t);
 226         unsigned long long (*pmd_val)(pmd_t);
 227         unsigned long long (*pgd_val)(pgd_t);
 228
 229         pte_t (*make_pte)(unsigned long long pte);
 230         pmd_t (*make_pmd)(unsigned long long pmd);
 231         pgd_t (*make_pgd)(unsigned long long pgd);
 232 #else
 233         unsigned long (*pte_val)(pte_t);
 234         unsigned long (*pgd_val)(pgd_t);
 235
 236         pte_t (*make_pte)(unsigned long pte);
 237         pgd_t (*make_pgd)(unsigned long pgd);
 238 #endif
 239
 240 #ifdef CONFIG_HIGHPTE
 241         void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
 242 #endif
 243
 244         struct pv_lazy_ops lazy_mode;
 245 };
 246
 247 /* This contains all the paravirt structures: we get a convenient
 248  * number for each function using the offset which we use to indicate
 249  * what to patch. */
 250 struct paravirt_patch_template
 251 {
 252         struct pv_init_ops pv_init_ops;
 253         struct pv_time_ops pv_time_ops;
 254         struct pv_cpu_ops pv_cpu_ops;
 255         struct pv_irq_ops pv_irq_ops;
 256         struct pv_apic_ops pv_apic_ops;
 257         struct pv_mmu_ops pv_mmu_ops;
 258 };
 259
 260 extern struct pv_info pv_info;
 261 extern struct pv_init_ops pv_init_ops;
 262 extern struct pv_time_ops pv_time_ops;
 263 extern struct pv_cpu_ops pv_cpu_ops;
 264 extern struct pv_irq_ops pv_irq_ops;
 265 extern struct pv_apic_ops pv_apic_ops;
 266 extern struct pv_mmu_ops pv_mmu_ops;
 267
 268 #define PARAVIRT_PATCH(x)                                       \
 269         (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
 270
 271 #define paravirt_type(op)                               \
 272         [paravirt_typenum] "i" (PARAVIRT_PATCH(op)),    \
 273         [paravirt_opptr] "m" (op)
 274 #define paravirt_clobber(clobber)               \
 275         [paravirt_clobber] "i" (clobber)
 276
 277 /*
 278  * Generate some code, and mark it as patchable by the
 279  * apply_paravirt() alternate instruction patcher.
 280  */
 281 #define _paravirt_alt(insn_string, type, clobber)       \
 282         "771:\n\t" insn_string "\n" "772:\n"            \
 283         ".pushsection .parainstructions,\"a\"\n"        \
 284         "  .long 771b\n"                                \
 285         "  .byte " type "\n"                            \
 286         "  .byte 772b-771b\n"                           \
 287         "  .short " clobber "\n"                        \
 288         ".popsection\n"
 289
 290 /* Generate patchable code, with the default asm parameters. */
 291 #define paravirt_alt(insn_string)                                       \
 292         _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
 293
 294 unsigned paravirt_patch_nop(void);
 295 unsigned paravirt_patch_ignore(unsigned len);
 296 unsigned paravirt_patch_call(void *insnbuf,
 297                              const void *target, u16 tgt_clobbers,
 298                              unsigned long addr, u16 site_clobbers,
 299                              unsigned len);
 300 unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
 301                             unsigned long addr, unsigned len);
 302 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
 303                                 unsigned long addr, unsigned len);
 304
 305 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
 306                               const char *start, const char *end);
 307
 308 int paravirt_disable_iospace(void);
 309
 310 /*
 311  * This generates an indirect call based on the operation type number.
 312  * The type number, computed in PARAVIRT_PATCH, is derived from the
 313  * offset into the paravirt_patch_template structure, and can therefore be
 314  * freely converted back into a structure offset.
 315  */
 316 #define PARAVIRT_CALL   "call *%[paravirt_opptr];"
 317
 318 /*
 319  * These macros are intended to wrap calls through one of the paravirt
 320  * ops structs, so that they can be later identified and patched at
 321  * runtime.
 322  *
 323  * Normally, a call to a pv_op function is a simple indirect call:
 324  * (pv_op_struct.operations)(args...).
 325  *
 326  * Unfortunately, this is a relatively slow operation for modern CPUs,
 327  * because it cannot necessarily determine what the destination
 328  * address is.  In this case, the address is a runtime constant, so at
 329  * the very least we can patch the call to e a simple direct call, or
 330  * ideally, patch an inline implementation into the callsite.  (Direct
 331  * calls are essentially free, because the call and return addresses
 332  * are completely predictable.)
 333  *
 334  * For i386, these macros rely on the standard gcc "regparm(3)" calling
 335  * convention, in which the first three arguments are placed in %eax,
 336  * %edx, %ecx (in that order), and the remaining arguments are placed
 337  * on the stack.  All caller-save registers (eax,edx,ecx) are expected
 338  * to be modified (either clobbered or used for return values).
 339  * X86_64, on the other hand, already specifies a register-based calling
 340  * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
 341  * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
 342  * special handling for dealing with 4 arguments, unlike i386.
 343  * However, x86_64 also have to clobber all caller saved registers, which
 344  * unfortunately, are quite a bit (r8 - r11)
 345  *
 346  * The call instruction itself is marked by placing its start address
 347  * and size into the .parainstructions section, so that
 348  * apply_paravirt() in arch/i386/kernel/alternative.c can do the
 349  * appropriate patching under the control of the backend pv_init_ops
 350  * implementation.
 351  *
 352  * Unfortunately there's no way to get gcc to generate the args setup
 353  * for the call, and then allow the call itself to be generated by an
 354  * inline asm.  Because of this, we must do the complete arg setup and
 355  * return value handling from within these macros.  This is fairly
 356  * cumbersome.
 357  *
 358  * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
 359  * It could be extended to more arguments, but there would be little
 360  * to be gained from that.  For each number of arguments, there are
 361  * the two VCALL and CALL variants for void and non-void functions.
 362  *
 363  * When there is a return value, the invoker of the macro must specify
 364  * the return type.  The macro then uses sizeof() on that type to
 365  * determine whether its a 32 or 64 bit value, and places the return
 366  * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
 367  * 64-bit). For x86_64 machines, it just returns at %rax regardless of
 368  * the return value size.
 369  *
 370  * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
 371  * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
 372  * in low,high order
 373  *
 374  * Small structures are passed and returned in registers.  The macro
 375  * calling convention can't directly deal with this, so the wrapper
 376  * functions must do this.
 377  *
 378  * These PVOP_* macros are only defined within this header.  This
 379  * means that all uses must be wrapped in inline functions.  This also
 380  * makes sure the incoming and outgoing types are always correct.
 381  */
 382 #ifdef CONFIG_X86_32
 383 #define PVOP_VCALL_ARGS                 unsigned long __eax, __edx, __ecx
 384 #define PVOP_CALL_ARGS                  PVOP_VCALL_ARGS
 385 #define PVOP_VCALL_CLOBBERS             "=a" (__eax), "=d" (__edx),     \
 386                                         "=c" (__ecx)
 387 #define PVOP_CALL_CLOBBERS              PVOP_VCALL_CLOBBERS
 388 #define EXTRA_CLOBBERS
 389 #define VEXTRA_CLOBBERS
 390 #else
 391 #define PVOP_VCALL_ARGS         unsigned long __edi, __esi, __edx, __ecx
 392 #define PVOP_CALL_ARGS          PVOP_VCALL_ARGS, __eax
 393 #define PVOP_VCALL_CLOBBERS     "=D" (__edi),                           \
 394                                 "=S" (__esi), "=d" (__edx),             \
 395                                 "=c" (__ecx)
 396
 397 #define PVOP_CALL_CLOBBERS      PVOP_VCALL_CLOBBERS, "=a" (__eax)
 398
 399 #define EXTRA_CLOBBERS   , "r8", "r9", "r10", "r11"
 400 #define VEXTRA_CLOBBERS  , "rax", "r8", "r9", "r10", "r11"
 401 #endif
 402
 403 #define __PVOP_CALL(rettype, op, pre, post, ...)                        \
 404         ({                                                              \
 405                 rettype __ret;                                          \
 406                 PVOP_CALL_ARGS;                                 \
 407                 /* This is 32-bit specific, but is okay in 64-bit */    \
 408                 /* since this condition will never hold */              \
 409                 if (sizeof(rettype) > sizeof(unsigned long)) {          \
 410                         asm volatile(pre                                \
 411                                      paravirt_alt(PARAVIRT_CALL)        \
 412                                      post                               \
 413                                      : PVOP_CALL_CLOBBERS               \
 414                                      : paravirt_type(op),               \
 415                                        paravirt_clobber(CLBR_ANY),      \
 416                                        ##__VA_ARGS__                    \
 417                                      : "memory", "cc" EXTRA_CLOBBERS);  \
 418                         __ret = (rettype)((((u64)__edx) << 32) | __eax); \
 419                 } else {                                                \
 420                         asm volatile(pre                                \
 421                                      paravirt_alt(PARAVIRT_CALL)        \
 422                                      post                               \
 423                                      : PVOP_CALL_CLOBBERS               \
 424                                      : paravirt_type(op),               \
 425                                        paravirt_clobber(CLBR_ANY),      \
 426                                        ##__VA_ARGS__                    \
 427                                      : "memory", "cc" EXTRA_CLOBBERS);  \
 428                         __ret = (rettype)__eax;                         \
 429                 }                                                       \
 430                 __ret;                                                  \
 431         })
 432 #define __PVOP_VCALL(op, pre, post, ...)                                \
 433         ({                                                              \
 434                 PVOP_VCALL_ARGS;                                        \
 435                 asm volatile(pre                                        \
 436                              paravirt_alt(PARAVIRT_CALL)                \
 437                              post                                       \
 438                              : PVOP_VCALL_CLOBBERS                      \
 439                              : paravirt_type(op),                       \
 440                                paravirt_clobber(CLBR_ANY),              \
 441                                ##__VA_ARGS__                            \
 442                              : "memory", "cc" VEXTRA_CLOBBERS);         \
 443         })
 444
 445 #define PVOP_CALL0(rettype, op)                                         \
 446         __PVOP_CALL(rettype, op, "", "")
 447 #define PVOP_VCALL0(op)                                                 \
 448         __PVOP_VCALL(op, "", "")
 449
 450 #define PVOP_CALL1(rettype, op, arg1)                                   \
 451         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)))
 452 #define PVOP_VCALL1(op, arg1)                                           \
 453         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)))
 454
 455 #define PVOP_CALL2(rettype, op, arg1, arg2)                             \
 456         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)),   \
 457         "1" ((unsigned long)(arg2)))
 458 #define PVOP_VCALL2(op, arg1, arg2)                                     \
 459         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)),           \
 460         "1" ((unsigned long)(arg2)))
 461
 462 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3)                       \
 463         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)),   \
 464         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)))
 465 #define PVOP_VCALL3(op, arg1, arg2, arg3)                               \
 466         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)),           \
 467         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)))
 468
 469 /* This is the only difference in x86_64. We can make it much simpler */
 470 #ifdef CONFIG_X86_32
 471 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4)                 \
 472         __PVOP_CALL(rettype, op,                                        \
 473                     "push %[_arg4];", "lea 4(%%esp),%%esp;",            \
 474                     "0" ((u32)(arg1)), "1" ((u32)(arg2)),               \
 475                     "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
 476 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4)                         \
 477         __PVOP_VCALL(op,                                                \
 478                     "push %[_arg4];", "lea 4(%%esp),%%esp;",            \
 479                     "0" ((u32)(arg1)), "1" ((u32)(arg2)),               \
 480                     "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
 481 #else
 482 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4)                 \
 483         __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)),   \
 484         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)),         \
 485         "3"((unsigned long)(arg4)))
 486 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4)                         \
 487         __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)),           \
 488         "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)),         \
 489         "3"((unsigned long)(arg4)))
 490 #endif
 491
 492 static inline int paravirt_enabled(void)
 493 {
 494         return pv_info.paravirt_enabled;
 495 }
 496
 497 static inline void load_sp0(struct tss_struct *tss,
 498                              struct thread_struct *thread)
 499 {
 500         PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
 501 }
 502
 503 #define ARCH_SETUP                      pv_init_ops.arch_setup();
 504 static inline unsigned long get_wallclock(void)
 505 {
 506         return PVOP_CALL0(unsigned long, pv_time_ops.get_wallclock);
 507 }
 508
 509 static inline int set_wallclock(unsigned long nowtime)
 510 {
 511         return PVOP_CALL1(int, pv_time_ops.set_wallclock, nowtime);
 512 }
 513
 514 static inline void (*choose_time_init(void))(void)
 515 {
 516         return pv_time_ops.time_init;
 517 }
 518
 519 /* The paravirtualized CPUID instruction. */
 520 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 521                            unsigned int *ecx, unsigned int *edx)
 522 {
 523         PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
 524 }
 525
 526 /*
 527  * These special macros can be used to get or set a debugging register
 528  */
 529 static inline unsigned long paravirt_get_debugreg(int reg)
 530 {
 531         return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
 532 }
 533 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
 534 static inline void set_debugreg(unsigned long val, int reg)
 535 {
 536         PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
 537 }
 538
 539 static inline void clts(void)
 540 {
 541         PVOP_VCALL0(pv_cpu_ops.clts);
 542 }
 543
 544 static inline unsigned long read_cr0(void)
 545 {
 546         return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
 547 }
 548
 549 static inline void write_cr0(unsigned long x)
 550 {
 551         PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
 552 }
 553
 554 static inline unsigned long read_cr2(void)
 555 {
 556         return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
 557 }
 558
 559 static inline void write_cr2(unsigned long x)
 560 {
 561         PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
 562 }
 563
 564 static inline unsigned long read_cr3(void)
 565 {
 566         return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
 567 }
 568
 569 static inline void write_cr3(unsigned long x)
 570 {
 571         PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
 572 }
 573
 574 static inline unsigned long read_cr4(void)
 575 {
 576         return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
 577 }
 578 static inline unsigned long read_cr4_safe(void)
 579 {
 580         return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe);
 581 }
 582
 583 static inline void write_cr4(unsigned long x)
 584 {
 585         PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
 586 }
 587
 588 static inline void raw_safe_halt(void)
 589 {
 590         PVOP_VCALL0(pv_irq_ops.safe_halt);
 591 }
 592
 593 static inline void halt(void)
 594 {
 595         PVOP_VCALL0(pv_irq_ops.safe_halt);
 596 }
 597
 598 static inline void wbinvd(void)
 599 {
 600         PVOP_VCALL0(pv_cpu_ops.wbinvd);
 601 }
 602
 603 #define get_kernel_rpl()  (pv_info.kernel_rpl)
 604
 605 static inline u64 paravirt_read_msr(unsigned msr, int *err)
 606 {
 607         return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
 608 }
 609 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
 610 {
 611         return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
 612 }
 613
 614 /* These should all do BUG_ON(_err), but our headers are too tangled. */
 615 #define rdmsr(msr,val1,val2) do {               \
 616         int _err;                               \
 617         u64 _l = paravirt_read_msr(msr, &_err); \
 618         val1 = (u32)_l;                         \
 619         val2 = _l >> 32;                        \
 620 } while(0)
 621
 622 #define wrmsr(msr,val1,val2) do {               \
 623         paravirt_write_msr(msr, val1, val2);    \
 624 } while(0)
 625
 626 #define rdmsrl(msr,val) do {                    \
 627         int _err;                               \
 628         val = paravirt_read_msr(msr, &_err);    \
 629 } while(0)
 630
 631 #define wrmsrl(msr,val)         wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
 632 #define wrmsr_safe(msr,a,b)     paravirt_write_msr(msr, a, b)
 633
 634 /* rdmsr with exception handling */
 635 #define rdmsr_safe(msr,a,b) ({                  \
 636         int _err;                               \
 637         u64 _l = paravirt_read_msr(msr, &_err); \
 638         (*a) = (u32)_l;                         \
 639         (*b) = _l >> 32;                        \
 640         _err; })
 641
 642
 643 static inline u64 paravirt_read_tsc(void)
 644 {
 645         return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
 646 }
 647
 648 #define rdtscl(low) do {                        \
 649         u64 _l = paravirt_read_tsc();           \
 650         low = (int)_l;                          \
 651 } while(0)
 652
 653 #define rdtscll(val) (val = paravirt_read_tsc())
 654
 655 static inline unsigned long long paravirt_sched_clock(void)
 656 {
 657         return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
 658 }
 659 #define calculate_cpu_khz() (pv_time_ops.get_cpu_khz())
 660
 661 static inline unsigned long long paravirt_read_pmc(int counter)
 662 {
 663         return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
 664 }
 665
 666 #define rdpmc(counter,low,high) do {            \
 667         u64 _l = paravirt_read_pmc(counter);    \
 668         low = (u32)_l;                          \
 669         high = _l >> 32;                        \
 670 } while(0)
 671
 672 static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
 673 {
 674         return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
 675 }
 676
 677 #define rdtscp(low, high, aux)                          \
 678 do {                                                    \
 679         int __aux;                                      \
 680         unsigned long __val = paravirt_rdtscp(&__aux);  \
 681         (low) = (u32)__val;                             \
 682         (high) = (u32)(__val >> 32);                    \
 683         (aux) = __aux;                                  \
 684 } while (0)
 685
 686 #define rdtscpll(val, aux)                              \
 687 do {                                                    \
 688         unsigned long __aux;                            \
 689         val = paravirt_rdtscp(&__aux);                  \
 690         (aux) = __aux;                                  \
 691 } while (0)
 692
 693 static inline void load_TR_desc(void)
 694 {
 695         PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 696 }
 697 static inline void load_gdt(const struct desc_ptr *dtr)
 698 {
 699         PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 700 }
 701 static inline void load_idt(const struct desc_ptr *dtr)
 702 {
 703         PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 704 }
 705 static inline void set_ldt(const void *addr, unsigned entries)
 706 {
 707         PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 708 }
 709 static inline void store_gdt(struct desc_ptr *dtr)
 710 {
 711         PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 712 }
 713 static inline void store_idt(struct desc_ptr *dtr)
 714 {
 715         PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 716 }
 717 static inline unsigned long paravirt_store_tr(void)
 718 {
 719         return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
 720 }
 721 #define store_tr(tr)    ((tr) = paravirt_store_tr())
 722 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 723 {
 724         PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 725 }
 726
 727 static inline void write_ldt_entry(struct desc_struct *dt, int entry,
 728                                    const void *desc)
 729 {
 730         PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 731 }
 732
 733 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
 734                                    void *desc, int type)
 735 {
 736         PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 737 }
 738
 739 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 740 {
 741         PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 742 }
 743 static inline void set_iopl_mask(unsigned mask)
 744 {
 745         PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
 746 }
 747
 748 /* The paravirtualized I/O functions */
 749 static inline void slow_down_io(void) {
 750         pv_cpu_ops.io_delay();
 751 #ifdef REALLY_SLOW_IO
 752         pv_cpu_ops.io_delay();
 753         pv_cpu_ops.io_delay();
 754         pv_cpu_ops.io_delay();
 755 #endif
 756 }
 757
 758 #ifdef CONFIG_X86_LOCAL_APIC
 759 /*
 760  * Basic functions accessing APICs.
 761  */
 762 static inline void apic_write(unsigned long reg, u32 v)
 763 {
 764         PVOP_VCALL2(pv_apic_ops.apic_write, reg, v);
 765 }
 766
 767 static inline void apic_write_atomic(unsigned long reg, u32 v)
 768 {
 769         PVOP_VCALL2(pv_apic_ops.apic_write_atomic, reg, v);
 770 }
 771
 772 static inline u32 apic_read(unsigned long reg)
 773 {
 774         return PVOP_CALL1(unsigned long, pv_apic_ops.apic_read, reg);
 775 }
 776
 777 static inline void setup_boot_clock(void)
 778 {
 779         PVOP_VCALL0(pv_apic_ops.setup_boot_clock);
 780 }
 781
 782 static inline void setup_secondary_clock(void)
 783 {
 784         PVOP_VCALL0(pv_apic_ops.setup_secondary_clock);
 785 }
 786 #endif
 787
 788 static inline void paravirt_post_allocator_init(void)
 789 {
 790         if (pv_init_ops.post_allocator_init)
 791                 (*pv_init_ops.post_allocator_init)();
 792 }
 793
 794 static inline void paravirt_pagetable_setup_start(pgd_t *base)
 795 {
 796         (*pv_mmu_ops.pagetable_setup_start)(base);
 797 }
 798
 799 static inline void paravirt_pagetable_setup_done(pgd_t *base)
 800 {
 801         (*pv_mmu_ops.pagetable_setup_done)(base);
 802 }
 803
 804 #ifdef CONFIG_SMP
 805 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 806                                     unsigned long start_esp)
 807 {
 808         PVOP_VCALL3(pv_apic_ops.startup_ipi_hook,
 809                     phys_apicid, start_eip, start_esp);
 810 }
 811 #endif
 812
 813 static inline void paravirt_activate_mm(struct mm_struct *prev,
 814                                         struct mm_struct *next)
 815 {
 816         PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
 817 }
 818
 819 static inline void arch_dup_mmap(struct mm_struct *oldmm,
 820                                  struct mm_struct *mm)
 821 {
 822         PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
 823 }
 824
 825 static inline void arch_exit_mmap(struct mm_struct *mm)
 826 {
 827         PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
 828 }
 829
 830 static inline void __flush_tlb(void)
 831 {
 832         PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
 833 }
 834 static inline void __flush_tlb_global(void)
 835 {
 836         PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
 837 }
 838 static inline void __flush_tlb_single(unsigned long addr)
 839 {
 840         PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
 841 }
 842
 843 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
 844                                     unsigned long va)
 845 {
 846         PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, &cpumask, mm, va);
 847 }
 848
 849 static inline void paravirt_alloc_pt(struct mm_struct *mm, unsigned pfn)
 850 {
 851         PVOP_VCALL2(pv_mmu_ops.alloc_pt, mm, pfn);
 852 }
 853 static inline void paravirt_release_pt(unsigned pfn)
 854 {
 855         PVOP_VCALL1(pv_mmu_ops.release_pt, pfn);
 856 }
 857
 858 static inline void paravirt_alloc_pd(unsigned pfn)
 859 {
 860         PVOP_VCALL1(pv_mmu_ops.alloc_pd, pfn);
 861 }
 862
 863 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
 864                                            unsigned start, unsigned count)
 865 {
 866         PVOP_VCALL4(pv_mmu_ops.alloc_pd_clone, pfn, clonepfn, start, count);
 867 }
 868 static inline void paravirt_release_pd(unsigned pfn)
 869 {
 870         PVOP_VCALL1(pv_mmu_ops.release_pd, pfn);
 871 }
 872
 873 #ifdef CONFIG_HIGHPTE
 874 static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
 875 {
 876         unsigned long ret;
 877         ret = PVOP_CALL2(unsigned long, pv_mmu_ops.kmap_atomic_pte, page, type);
 878         return (void *)ret;
 879 }
 880 #endif
 881
 882 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
 883                               pte_t *ptep)
 884 {
 885         PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
 886 }
 887
 888 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
 889                                     pte_t *ptep)
 890 {
 891         PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
 892 }
 893
 894 #ifdef CONFIG_X86_PAE
 895 static inline pte_t __pte(unsigned long long val)
 896 {
 897         unsigned long long ret = PVOP_CALL2(unsigned long long,
 898                                             pv_mmu_ops.make_pte,
 899                                             val, val >> 32);
 900         return (pte_t) { ret, ret >> 32 };
 901 }
 902
 903 static inline pmd_t __pmd(unsigned long long val)
 904 {
 905         return (pmd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pmd,
 906                                     val, val >> 32) };
 907 }
 908
 909 static inline pgd_t __pgd(unsigned long long val)
 910 {
 911         return (pgd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pgd,
 912                                     val, val >> 32) };
 913 }
 914
 915 static inline unsigned long long pte_val(pte_t x)
 916 {
 917         return PVOP_CALL2(unsigned long long, pv_mmu_ops.pte_val,
 918                           x.pte_low, x.pte_high);
 919 }
 920
 921 static inline unsigned long long pmd_val(pmd_t x)
 922 {
 923         return PVOP_CALL2(unsigned long long, pv_mmu_ops.pmd_val,
 924                           x.pmd, x.pmd >> 32);
 925 }
 926
 927 static inline unsigned long long pgd_val(pgd_t x)
 928 {
 929         return PVOP_CALL2(unsigned long long, pv_mmu_ops.pgd_val,
 930                           x.pgd, x.pgd >> 32);
 931 }
 932
 933 static inline void set_pte(pte_t *ptep, pte_t pteval)
 934 {
 935         PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pteval.pte_low, pteval.pte_high);
 936 }
 937
 938 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 939                               pte_t *ptep, pte_t pteval)
 940 {
 941         /* 5 arg words */
 942         pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
 943 }
 944
 945 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 946 {
 947         PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
 948                     pteval.pte_low, pteval.pte_high);
 949 }
 950
 951 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
 952                                    pte_t *ptep, pte_t pte)
 953 {
 954         /* 5 arg words */
 955         pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
 956 }
 957
 958 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 959 {
 960         PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp,
 961                     pmdval.pmd, pmdval.pmd >> 32);
 962 }
 963
 964 static inline void set_pud(pud_t *pudp, pud_t pudval)
 965 {
 966         PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
 967                     pudval.pgd.pgd, pudval.pgd.pgd >> 32);
 968 }
 969
 970 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 971 {
 972         PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
 973 }
 974
 975 static inline void pmd_clear(pmd_t *pmdp)
 976 {
 977         PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
 978 }
 979
 980 #else  /* !CONFIG_X86_PAE */
 981
 982 static inline pte_t __pte(unsigned long val)
 983 {
 984         return (pte_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pte, val) };
 985 }
 986
 987 static inline pgd_t __pgd(unsigned long val)
 988 {
 989         return (pgd_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pgd, val) };
 990 }
 991
 992 static inline unsigned long pte_val(pte_t x)
 993 {
 994         return PVOP_CALL1(unsigned long, pv_mmu_ops.pte_val, x.pte_low);
 995 }
 996
 997 static inline unsigned long pgd_val(pgd_t x)
 998 {
 999         return PVOP_CALL1(unsigned long, pv_mmu_ops.pgd_val, x.pgd);
1000 }
1001
1002 static inline void set_pte(pte_t *ptep, pte_t pteval)
1003 {
1004         PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pteval.pte_low);
1005 }
1006
1007 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
1008                               pte_t *ptep, pte_t pteval)
1009 {
1010         PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pteval.pte_low);
1011 }
1012
1013 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
1014 {
1015         PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
1016 }
1017 #endif  /* CONFIG_X86_PAE */
1018
1019 /* Lazy mode for batching updates / context switch */
1020 enum paravirt_lazy_mode {
1021         PARAVIRT_LAZY_NONE,
1022         PARAVIRT_LAZY_MMU,
1023         PARAVIRT_LAZY_CPU,
1024 };
1025
1026 enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
1027 void paravirt_enter_lazy_cpu(void);
1028 void paravirt_leave_lazy_cpu(void);
1029 void paravirt_enter_lazy_mmu(void);
1030 void paravirt_leave_lazy_mmu(void);
1031 void paravirt_leave_lazy(enum paravirt_lazy_mode mode);
1032
1033 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
1034 static inline void arch_enter_lazy_cpu_mode(void)
1035 {
1036         PVOP_VCALL0(pv_cpu_ops.lazy_mode.enter);
1037 }
1038
1039 static inline void arch_leave_lazy_cpu_mode(void)
1040 {
1041         PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave);
1042 }
1043
1044 static inline void arch_flush_lazy_cpu_mode(void)
1045 {
1046         if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)) {
1047                 arch_leave_lazy_cpu_mode();
1048                 arch_enter_lazy_cpu_mode();
1049         }
1050 }
1051
1052
1053 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
1054 static inline void arch_enter_lazy_mmu_mode(void)
1055 {
1056         PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
1057 }
1058
1059 static inline void arch_leave_lazy_mmu_mode(void)
1060 {
1061         PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
1062 }
1063
1064 static inline void arch_flush_lazy_mmu_mode(void)
1065 {
1066         if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU)) {
1067                 arch_leave_lazy_mmu_mode();
1068                 arch_enter_lazy_mmu_mode();
1069         }
1070 }
1071
1072 void _paravirt_nop(void);
1073 #define paravirt_nop    ((void *)_paravirt_nop)
1074
1075 /* These all sit in the .parainstructions section to tell us what to patch. */
1076 struct paravirt_patch_site {
1077         u8 *instr;              /* original instructions */
1078         u8 instrtype;           /* type of this instruction */
1079         u8 len;                 /* length of original instruction */
1080         u16 clobbers;           /* what registers you may clobber */
1081 };
1082
1083 extern struct paravirt_patch_site __parainstructions[],
1084         __parainstructions_end[];
1085
1086 static inline unsigned long __raw_local_save_flags(void)
1087 {
1088         unsigned long f;
1089
1090         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1091                                   PARAVIRT_CALL
1092                                   "popl %%edx; popl %%ecx")
1093                      : "=a"(f)
1094                      : paravirt_type(pv_irq_ops.save_fl),
1095                        paravirt_clobber(CLBR_EAX)
1096                      : "memory", "cc");
1097         return f;
1098 }
1099
1100 static inline void raw_local_irq_restore(unsigned long f)
1101 {
1102         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1103                                   PARAVIRT_CALL
1104                                   "popl %%edx; popl %%ecx")
1105                      : "=a"(f)
1106                      : "0"(f),
1107                        paravirt_type(pv_irq_ops.restore_fl),
1108                        paravirt_clobber(CLBR_EAX)
1109                      : "memory", "cc");
1110 }
1111
1112 static inline void raw_local_irq_disable(void)
1113 {
1114         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1115                                   PARAVIRT_CALL
1116                                   "popl %%edx; popl %%ecx")
1117                      :
1118                      : paravirt_type(pv_irq_ops.irq_disable),
1119                        paravirt_clobber(CLBR_EAX)
1120                      : "memory", "eax", "cc");
1121 }
1122
1123 static inline void raw_local_irq_enable(void)
1124 {
1125         asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
1126                                   PARAVIRT_CALL
1127                                   "popl %%edx; popl %%ecx")
1128                      :
1129                      : paravirt_type(pv_irq_ops.irq_enable),
1130                        paravirt_clobber(CLBR_EAX)
1131                      : "memory", "eax", "cc");
1132 }
1133
1134 static inline unsigned long __raw_local_irq_save(void)
1135 {
1136         unsigned long f;
1137
1138         f = __raw_local_save_flags();
1139         raw_local_irq_disable();
1140         return f;
1141 }
1142
1143 /* Make sure as little as possible of this mess escapes. */
1144 #undef PARAVIRT_CALL
1145 #undef __PVOP_CALL
1146 #undef __PVOP_VCALL
1147 #undef PVOP_VCALL0
1148 #undef PVOP_CALL0
1149 #undef PVOP_VCALL1
1150 #undef PVOP_CALL1
1151 #undef PVOP_VCALL2
1152 #undef PVOP_CALL2
1153 #undef PVOP_VCALL3
1154 #undef PVOP_CALL3
1155 #undef PVOP_VCALL4
1156 #undef PVOP_CALL4
1157
1158 #else  /* __ASSEMBLY__ */
1159
1160 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4)
1161
1162 #define PARA_SITE(ptype, clobbers, ops)         \
1163 771:;                                           \
1164         ops;                                    \
1165 772:;                                           \
1166         .pushsection .parainstructions,"a";     \
1167          .long 771b;                            \
1168          .byte ptype;                           \
1169          .byte 772b-771b;                       \
1170          .short clobbers;                       \
1171         .popsection
1172
1173 #define INTERRUPT_RETURN                                                \
1174         PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE,       \
1175                   jmp *%cs:pv_cpu_ops+PV_CPU_iret)
1176
1177 #define DISABLE_INTERRUPTS(clobbers)                                    \
1178         PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
1179                   pushl %eax; pushl %ecx; pushl %edx;                   \
1180                   call *%cs:pv_irq_ops+PV_IRQ_irq_disable;              \
1181                   popl %edx; popl %ecx; popl %eax)                      \
1182
1183 #define ENABLE_INTERRUPTS(clobbers)                                     \
1184         PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers,  \
1185                   pushl %eax; pushl %ecx; pushl %edx;                   \
1186                   call *%cs:pv_irq_ops+PV_IRQ_irq_enable;               \
1187                   popl %edx; popl %ecx; popl %eax)
1188
1189 #define ENABLE_INTERRUPTS_SYSCALL_RET                                   \
1190         PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_syscall_ret),\
1191                   CLBR_NONE,                                            \
1192                   jmp *%cs:pv_cpu_ops+PV_CPU_irq_enable_syscall_ret)
1193
1194 #define GET_CR0_INTO_EAX                        \
1195         push %ecx; push %edx;                   \
1196         call *pv_cpu_ops+PV_CPU_read_cr0;       \
1197         pop %edx; pop %ecx
1198
1199 #endif /* __ASSEMBLY__ */
1200 #endif /* CONFIG_PARAVIRT */
1201 #endif  /* __ASM_PARAVIRT_H */