exec-all.h

   1 /*
   2  * internal execution defines for qemu
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /* allow to see translation results - the slowdown should be negligible, so we leave it */
  22 #define DEBUG_DISAS
  23
  24 /* is_jmp field values */
  25 #define DISAS_NEXT    0 /* next instruction can be analyzed */
  26 #define DISAS_JUMP    1 /* only pc was modified dynamically */
  27 #define DISAS_UPDATE  2 /* cpu state was modified dynamically */
  28 #define DISAS_TB_JUMP 3 /* only pc was modified statically */
  29
  30 struct TranslationBlock;
  31
  32 /* XXX: make safe guess about sizes */
  33 #define MAX_OP_PER_INSTR 32
  34 /* A Call op needs up to 6 + 2N parameters (N = number of arguments).  */
  35 #define MAX_OPC_PARAM 10
  36 #define OPC_BUF_SIZE 512
  37 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
  38
  39 /* Maximum size a TCG op can expand to.  This is complicated because a
  40    single op may require several host instructions and regirster reloads.
  41    For now take a wild guess at 128 bytes, which should allow at least
  42    a couple of fixup instructions per argument.  */
  43 #define TCG_MAX_OP_SIZE 128
  44
  45 #define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM)
  46
  47 extern target_ulong gen_opc_pc[OPC_BUF_SIZE];
  48 extern target_ulong gen_opc_npc[OPC_BUF_SIZE];
  49 extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  50 extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  51 extern target_ulong gen_opc_jump_pc[2];
  52 extern uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  53
  54 typedef void (GenOpFunc)(void);
  55 typedef void (GenOpFunc1)(long);
  56 typedef void (GenOpFunc2)(long, long);
  57 typedef void (GenOpFunc3)(long, long, long);
  58
  59 #if defined(TARGET_I386)
  60
  61 void optimize_flags_init(void);
  62
  63 #endif
  64
  65 extern FILE *logfile;
  66 extern int loglevel;
  67
  68 int gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);
  69 int gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);
  70 void gen_pc_load(CPUState *env, struct TranslationBlock *tb,
  71                  unsigned long searched_pc, int pc_pos, void *puc);
  72
  73 unsigned long code_gen_max_block_size(void);
  74 void cpu_gen_init(void);
  75 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
  76                  int *gen_code_size_ptr);
  77 int cpu_restore_state(struct TranslationBlock *tb,
  78                       CPUState *env, unsigned long searched_pc,
  79                       void *puc);
  80 int cpu_gen_code_copy(CPUState *env, struct TranslationBlock *tb,
  81                       int max_code_size, int *gen_code_size_ptr);
  82 int cpu_restore_state_copy(struct TranslationBlock *tb,
  83                            CPUState *env, unsigned long searched_pc,
  84                            void *puc);
  85 void cpu_resume_from_signal(CPUState *env1, void *puc);
  86 void cpu_exec_init(CPUState *env);
  87 int page_unprotect(target_ulong address, unsigned long pc, void *puc);
  88 void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
  89                                    int is_cpu_write_access);
  90 void tb_invalidate_page_range(target_ulong start, target_ulong end);
  91 void tlb_flush_page(CPUState *env, target_ulong addr);
  92 void tlb_flush(CPUState *env, int flush_global);
  93 int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
  94                       target_phys_addr_t paddr, int prot,
  95                       int mmu_idx, int is_softmmu);
  96 static inline int tlb_set_page(CPUState *env, target_ulong vaddr,
  97                                target_phys_addr_t paddr, int prot,
  98                                int mmu_idx, int is_softmmu)
  99 {
 100     if (prot & PAGE_READ)
 101         prot |= PAGE_EXEC;
 102     return tlb_set_page_exec(env, vaddr, paddr, prot, mmu_idx, is_softmmu);
 103 }
 104
 105 #define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */
 106
 107 #define CODE_GEN_PHYS_HASH_BITS     15
 108 #define CODE_GEN_PHYS_HASH_SIZE     (1 << CODE_GEN_PHYS_HASH_BITS)
 109
 110 /* maximum total translate dcode allocated */
 111
 112 /* NOTE: the translated code area cannot be too big because on some
 113    archs the range of "fast" function calls is limited. Here is a
 114    summary of the ranges:
 115
 116    i386  : signed 32 bits
 117    arm   : signed 26 bits
 118    ppc   : signed 24 bits
 119    sparc : signed 32 bits
 120    alpha : signed 23 bits
 121 */
 122
 123 #if defined(__alpha__)
 124 #define CODE_GEN_BUFFER_SIZE     (2 * 1024 * 1024)
 125 #elif defined(__ia64)
 126 #define CODE_GEN_BUFFER_SIZE     (4 * 1024 * 1024)      /* range of addl */
 127 #elif defined(__powerpc__)
 128 #define CODE_GEN_BUFFER_SIZE     (6 * 1024 * 1024)
 129 #else
 130 /* XXX: make it dynamic on x86 */
 131 #define CODE_GEN_BUFFER_SIZE     (16 * 1024 * 1024)
 132 #endif
 133
 134 //#define CODE_GEN_BUFFER_SIZE     (128 * 1024)
 135
 136 /* estimated block size for TB allocation */
 137 /* XXX: use a per code average code fragment size and modulate it
 138    according to the host CPU */
 139 #if defined(CONFIG_SOFTMMU)
 140 #define CODE_GEN_AVG_BLOCK_SIZE 128
 141 #else
 142 #define CODE_GEN_AVG_BLOCK_SIZE 64
 143 #endif
 144
 145 #define CODE_GEN_MAX_BLOCKS    (CODE_GEN_BUFFER_SIZE / CODE_GEN_AVG_BLOCK_SIZE)
 146
 147 #if defined(__powerpc__) || defined(__x86_64__)
 148 #define USE_DIRECT_JUMP
 149 #endif
 150 #if defined(__i386__) && !defined(_WIN32)
 151 #define USE_DIRECT_JUMP
 152 #endif
 153
 154 typedef struct TranslationBlock {
 155     target_ulong pc;   /* simulated PC corresponding to this block (EIP + CS base) */
 156     target_ulong cs_base; /* CS base for this block */
 157     uint64_t flags; /* flags defining in which context the code was generated */
 158     uint16_t size;      /* size of target code for this block (1 <=
 159                            size <= TARGET_PAGE_SIZE) */
 160     uint16_t cflags;    /* compile flags */
 161 #define CF_CODE_COPY   0x0001 /* block was generated in code copy mode */
 162 #define CF_TB_FP_USED  0x0002 /* fp ops are used in the TB */
 163 #define CF_FP_USED     0x0004 /* fp ops are used in the TB or in a chained TB */
 164 #define CF_SINGLE_INSN 0x0008 /* compile only a single instruction */
 165
 166     uint8_t *tc_ptr;    /* pointer to the translated code */
 167     /* next matching tb for physical address. */
 168     struct TranslationBlock *phys_hash_next;
 169     /* first and second physical page containing code. The lower bit
 170        of the pointer tells the index in page_next[] */
 171     struct TranslationBlock *page_next[2];
 172     target_ulong page_addr[2];
 173
 174     /* the following data are used to directly call another TB from
 175        the code of this one. */
 176     uint16_t tb_next_offset[2]; /* offset of original jump target */
 177 #ifdef USE_DIRECT_JUMP
 178     uint16_t tb_jmp_offset[4]; /* offset of jump instruction */
 179 #else
 180     unsigned long tb_next[2]; /* address of jump generated code */
 181 #endif
 182     /* list of TBs jumping to this one. This is a circular list using
 183        the two least significant bits of the pointers to tell what is
 184        the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
 185        jmp_first */
 186     struct TranslationBlock *jmp_next[2];
 187     struct TranslationBlock *jmp_first;
 188 } TranslationBlock;
 189
 190 static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc)
 191 {
 192     target_ulong tmp;
 193     tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
 194     return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK;
 195 }
 196
 197 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
 198 {
 199     target_ulong tmp;
 200     tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
 201     return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK)
 202             | (tmp & TB_JMP_ADDR_MASK));
 203 }
 204
 205 static inline unsigned int tb_phys_hash_func(unsigned long pc)
 206 {
 207     return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);
 208 }
 209
 210 TranslationBlock *tb_alloc(target_ulong pc);
 211 void tb_flush(CPUState *env);
 212 void tb_link_phys(TranslationBlock *tb,
 213                   target_ulong phys_pc, target_ulong phys_page2);
 214
 215 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
 216
 217 extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
 218 extern uint8_t *code_gen_ptr;
 219
 220 #if defined(USE_DIRECT_JUMP)
 221
 222 #if defined(__powerpc__)
 223 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 224 {
 225     uint32_t val, *ptr;
 226
 227     /* patch the branch destination */
 228     ptr = (uint32_t *)jmp_addr;
 229     val = *ptr;
 230     val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc);
 231     *ptr = val;
 232     /* flush icache */
 233     asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
 234     asm volatile ("sync" : : : "memory");
 235     asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory");
 236     asm volatile ("sync" : : : "memory");
 237     asm volatile ("isync" : : : "memory");
 238 }
 239 #elif defined(__i386__) || defined(__x86_64__)
 240 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 241 {
 242     /* patch the branch destination */
 243     *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
 244     /* no need to flush icache explicitely */
 245 }
 246 #endif
 247
 248 static inline void tb_set_jmp_target(TranslationBlock *tb,
 249                                      int n, unsigned long addr)
 250 {
 251     unsigned long offset;
 252
 253     offset = tb->tb_jmp_offset[n];
 254     tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 255     offset = tb->tb_jmp_offset[n + 2];
 256     if (offset != 0xffff)
 257         tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 258 }
 259
 260 #else
 261
 262 /* set the jump target */
 263 static inline void tb_set_jmp_target(TranslationBlock *tb,
 264                                      int n, unsigned long addr)
 265 {
 266     tb->tb_next[n] = addr;
 267 }
 268
 269 #endif
 270
 271 static inline void tb_add_jump(TranslationBlock *tb, int n,
 272                                TranslationBlock *tb_next)
 273 {
 274     /* NOTE: this test is only needed for thread safety */
 275     if (!tb->jmp_next[n]) {
 276         /* patch the native jump address */
 277         tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
 278
 279         /* add in TB jmp circular list */
 280         tb->jmp_next[n] = tb_next->jmp_first;
 281         tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
 282     }
 283 }
 284
 285 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
 286
 287 #ifndef offsetof
 288 #define offsetof(type, field) ((size_t) &((type *)0)->field)
 289 #endif
 290
 291 #if defined(_WIN32)
 292 #define ASM_DATA_SECTION ".section \".data\"\n"
 293 #define ASM_PREVIOUS_SECTION ".section .text\n"
 294 #elif defined(__APPLE__)
 295 #define ASM_DATA_SECTION ".data\n"
 296 #define ASM_PREVIOUS_SECTION ".text\n"
 297 #else
 298 #define ASM_DATA_SECTION ".section \".data\"\n"
 299 #define ASM_PREVIOUS_SECTION ".previous\n"
 300 #endif
 301
 302 #define ASM_OP_LABEL_NAME(n, opname) \
 303     ASM_NAME(__op_label) #n "." ASM_NAME(opname)
 304
 305 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
 306 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
 307 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];
 308
 309 #if defined(__hppa__)
 310
 311 typedef int spinlock_t[4];
 312
 313 #define SPIN_LOCK_UNLOCKED { 1, 1, 1, 1 }
 314
 315 static inline void resetlock (spinlock_t *p)
 316 {
 317     (*p)[0] = (*p)[1] = (*p)[2] = (*p)[3] = 1;
 318 }
 319
 320 #else
 321
 322 typedef int spinlock_t;
 323
 324 #define SPIN_LOCK_UNLOCKED 0
 325
 326 static inline void resetlock (spinlock_t *p)
 327 {
 328     *p = SPIN_LOCK_UNLOCKED;
 329 }
 330
 331 #endif
 332
 333 #if defined(__powerpc__)
 334 static inline int testandset (int *p)
 335 {
 336     int ret;
 337     __asm__ __volatile__ (
 338                           "0:    lwarx %0,0,%1\n"
 339                           "      xor. %0,%3,%0\n"
 340                           "      bne 1f\n"
 341                           "      stwcx. %2,0,%1\n"
 342                           "      bne- 0b\n"
 343                           "1:    "
 344                           : "=&r" (ret)
 345                           : "r" (p), "r" (1), "r" (0)
 346                           : "cr0", "memory");
 347     return ret;
 348 }
 349 #elif defined(__i386__)
 350 static inline int testandset (int *p)
 351 {
 352     long int readval = 0;
 353
 354     __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
 355                           : "+m" (*p), "+a" (readval)
 356                           : "r" (1)
 357                           : "cc");
 358     return readval;
 359 }
 360 #elif defined(__x86_64__)
 361 static inline int testandset (int *p)
 362 {
 363     long int readval = 0;
 364
 365     __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
 366                           : "+m" (*p), "+a" (readval)
 367                           : "r" (1)
 368                           : "cc");
 369     return readval;
 370 }
 371 #elif defined(__s390__)
 372 static inline int testandset (int *p)
 373 {
 374     int ret;
 375
 376     __asm__ __volatile__ ("0: cs    %0,%1,0(%2)\n"
 377                           "   jl    0b"
 378                           : "=&d" (ret)
 379                           : "r" (1), "a" (p), "0" (*p)
 380                           : "cc", "memory" );
 381     return ret;
 382 }
 383 #elif defined(__alpha__)
 384 static inline int testandset (int *p)
 385 {
 386     int ret;
 387     unsigned long one;
 388
 389     __asm__ __volatile__ ("0:   mov 1,%2\n"
 390                           "     ldl_l %0,%1\n"
 391                           "     stl_c %2,%1\n"
 392                           "     beq %2,1f\n"
 393                           ".subsection 2\n"
 394                           "1:   br 0b\n"
 395                           ".previous"
 396                           : "=r" (ret), "=m" (*p), "=r" (one)
 397                           : "m" (*p));
 398     return ret;
 399 }
 400 #elif defined(__sparc__)
 401 static inline int testandset (int *p)
 402 {
 403         int ret;
 404
 405         __asm__ __volatile__("ldstub    [%1], %0"
 406                              : "=r" (ret)
 407                              : "r" (p)
 408                              : "memory");
 409
 410         return (ret ? 1 : 0);
 411 }
 412 #elif defined(__arm__)
 413 static inline int testandset (int *spinlock)
 414 {
 415     register unsigned int ret;
 416     __asm__ __volatile__("swp %0, %1, [%2]"
 417                          : "=r"(ret)
 418                          : "0"(1), "r"(spinlock));
 419
 420     return ret;
 421 }
 422 #elif defined(__mc68000)
 423 static inline int testandset (int *p)
 424 {
 425     char ret;
 426     __asm__ __volatile__("tas %1; sne %0"
 427                          : "=r" (ret)
 428                          : "m" (p)
 429                          : "cc","memory");
 430     return ret;
 431 }
 432 #elif defined(__hppa__)
 433
 434 /* Because malloc only guarantees 8-byte alignment for malloc'd data,
 435    and GCC only guarantees 8-byte alignment for stack locals, we can't
 436    be assured of 16-byte alignment for atomic lock data even if we
 437    specify "__attribute ((aligned(16)))" in the type declaration.  So,
 438    we use a struct containing an array of four ints for the atomic lock
 439    type and dynamically select the 16-byte aligned int from the array
 440    for the semaphore.  */
 441 #define __PA_LDCW_ALIGNMENT 16
 442 static inline void *ldcw_align (void *p) {
 443     unsigned long a = (unsigned long)p;
 444     a = (a + __PA_LDCW_ALIGNMENT - 1) & ~(__PA_LDCW_ALIGNMENT - 1);
 445     return (void *)a;
 446 }
 447
 448 static inline int testandset (spinlock_t *p)
 449 {
 450     unsigned int ret;
 451     p = ldcw_align(p);
 452     __asm__ __volatile__("ldcw 0(%1),%0"
 453                          : "=r" (ret)
 454                          : "r" (p)
 455                          : "memory" );
 456     return !ret;
 457 }
 458
 459 #elif defined(__ia64)
 460
 461 #include <ia64intrin.h>
 462
 463 static inline int testandset (int *p)
 464 {
 465     return __sync_lock_test_and_set (p, 1);
 466 }
 467 #elif defined(__mips__)
 468 static inline int testandset (int *p)
 469 {
 470     int ret;
 471
 472     __asm__ __volatile__ (
 473         "       .set push               \n"
 474         "       .set noat               \n"
 475         "       .set mips2              \n"
 476         "1:     li      $1, 1           \n"
 477         "       ll      %0, %1          \n"
 478         "       sc      $1, %1          \n"
 479         "       beqz    $1, 1b          \n"
 480         "       .set pop                "
 481         : "=r" (ret), "+R" (*p)
 482         :
 483         : "memory");
 484
 485     return ret;
 486 }
 487 #else
 488 #error unimplemented CPU support
 489 #endif
 490
 491 #if defined(CONFIG_USER_ONLY)
 492 static inline void spin_lock(spinlock_t *lock)
 493 {
 494     while (testandset(lock));
 495 }
 496
 497 static inline void spin_unlock(spinlock_t *lock)
 498 {
 499     resetlock(lock);
 500 }
 501
 502 static inline int spin_trylock(spinlock_t *lock)
 503 {
 504     return !testandset(lock);
 505 }
 506 #else
 507 static inline void spin_lock(spinlock_t *lock)
 508 {
 509 }
 510
 511 static inline void spin_unlock(spinlock_t *lock)
 512 {
 513 }
 514
 515 static inline int spin_trylock(spinlock_t *lock)
 516 {
 517     return 1;
 518 }
 519 #endif
 520
 521 extern spinlock_t tb_lock;
 522
 523 extern int tb_invalidated_flag;
 524
 525 #if !defined(CONFIG_USER_ONLY)
 526
 527 void tlb_fill(target_ulong addr, int is_write, int mmu_idx,
 528               void *retaddr);
 529
 530 #define ACCESS_TYPE (NB_MMU_MODES + 1)
 531 #define MEMSUFFIX _code
 532 #define env cpu_single_env
 533
 534 #define DATA_SIZE 1
 535 #include "softmmu_header.h"
 536
 537 #define DATA_SIZE 2
 538 #include "softmmu_header.h"
 539
 540 #define DATA_SIZE 4
 541 #include "softmmu_header.h"
 542
 543 #define DATA_SIZE 8
 544 #include "softmmu_header.h"
 545
 546 #undef ACCESS_TYPE
 547 #undef MEMSUFFIX
 548 #undef env
 549
 550 #endif
 551
 552 #if defined(CONFIG_USER_ONLY)
 553 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 554 {
 555     return addr;
 556 }
 557 #else
 558 /* NOTE: this function can trigger an exception */
 559 /* NOTE2: the returned address is not exactly the physical address: it
 560    is the offset relative to phys_ram_base */
 561 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 562 {
 563     int mmu_idx, index, pd;
 564
 565     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 566     mmu_idx = cpu_mmu_index(env);
 567     if (__builtin_expect(env->tlb_table[mmu_idx][index].addr_code !=
 568                          (addr & TARGET_PAGE_MASK), 0)) {
 569         ldub_code(addr);
 570     }
 571     pd = env->tlb_table[mmu_idx][index].addr_code & ~TARGET_PAGE_MASK;
 572     if (pd > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
 573 #if defined(TARGET_SPARC) || defined(TARGET_MIPS)
 574         do_unassigned_access(addr, 0, 1, 0);
 575 #else
 576         cpu_abort(env, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr);
 577 #endif
 578     }
 579     return addr + env->tlb_table[mmu_idx][index].addend - (unsigned long)phys_ram_base;
 580 }
 581 #endif
 582
 583 #ifdef USE_KQEMU
 584 #define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))
 585
 586 int kqemu_init(CPUState *env);
 587 int kqemu_cpu_exec(CPUState *env);
 588 void kqemu_flush_page(CPUState *env, target_ulong addr);
 589 void kqemu_flush(CPUState *env, int global);
 590 void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
 591 void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);
 592 void kqemu_cpu_interrupt(CPUState *env);
 593 void kqemu_record_dump(void);
 594
 595 static inline int kqemu_is_ok(CPUState *env)
 596 {
 597     return(env->kqemu_enabled &&
 598            (env->cr[0] & CR0_PE_MASK) &&
 599            !(env->hflags & HF_INHIBIT_IRQ_MASK) &&
 600            (env->eflags & IF_MASK) &&
 601            !(env->eflags & VM_MASK) &&
 602            (env->kqemu_enabled == 2 ||
 603             ((env->hflags & HF_CPL_MASK) == 3 &&
 604              (env->eflags & IOPL_MASK) != IOPL_MASK)));
 605 }
 606
 607 #endif