File:  [Qemu by Fabrice Bellard] / qemu / target-i386 / machine.c
Revision 1.1.1.6 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 19:02:52 2018 UTC (3 years, 9 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu1000, qemu0151, HEAD
qemu 0.15.1

    1: #include "hw/hw.h"
    2: #include "hw/boards.h"
    3: #include "hw/pc.h"
    4: #include "hw/isa.h"
    5: 
    6: #include "cpu.h"
    7: #include "kvm.h"
    8: 
    9: static const VMStateDescription vmstate_segment = {
   10:     .name = "segment",
   11:     .version_id = 1,
   12:     .minimum_version_id = 1,
   13:     .minimum_version_id_old = 1,
   14:     .fields      = (VMStateField []) {
   15:         VMSTATE_UINT32(selector, SegmentCache),
   16:         VMSTATE_UINTTL(base, SegmentCache),
   17:         VMSTATE_UINT32(limit, SegmentCache),
   18:         VMSTATE_UINT32(flags, SegmentCache),
   19:         VMSTATE_END_OF_LIST()
   20:     }
   21: };
   22: 
   23: #define VMSTATE_SEGMENT(_field, _state) {                            \
   24:     .name       = (stringify(_field)),                               \
   25:     .size       = sizeof(SegmentCache),                              \
   26:     .vmsd       = &vmstate_segment,                                  \
   27:     .flags      = VMS_STRUCT,                                        \
   28:     .offset     = offsetof(_state, _field)                           \
   29:             + type_check(SegmentCache,typeof_field(_state, _field))  \
   30: }
   31: 
   32: #define VMSTATE_SEGMENT_ARRAY(_field, _state, _n)                    \
   33:     VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_segment, SegmentCache)
   34: 
   35: static const VMStateDescription vmstate_xmm_reg = {
   36:     .name = "xmm_reg",
   37:     .version_id = 1,
   38:     .minimum_version_id = 1,
   39:     .minimum_version_id_old = 1,
   40:     .fields      = (VMStateField []) {
   41:         VMSTATE_UINT64(XMM_Q(0), XMMReg),
   42:         VMSTATE_UINT64(XMM_Q(1), XMMReg),
   43:         VMSTATE_END_OF_LIST()
   44:     }
   45: };
   46: 
   47: #define VMSTATE_XMM_REGS(_field, _state, _n)                         \
   48:     VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_xmm_reg, XMMReg)
   49: 
   50: /* YMMH format is the same as XMM */
   51: static const VMStateDescription vmstate_ymmh_reg = {
   52:     .name = "ymmh_reg",
   53:     .version_id = 1,
   54:     .minimum_version_id = 1,
   55:     .minimum_version_id_old = 1,
   56:     .fields      = (VMStateField []) {
   57:         VMSTATE_UINT64(XMM_Q(0), XMMReg),
   58:         VMSTATE_UINT64(XMM_Q(1), XMMReg),
   59:         VMSTATE_END_OF_LIST()
   60:     }
   61: };
   62: 
   63: #define VMSTATE_YMMH_REGS_VARS(_field, _state, _n, _v)                         \
   64:     VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_ymmh_reg, XMMReg)
   65: 
   66: static const VMStateDescription vmstate_mtrr_var = {
   67:     .name = "mtrr_var",
   68:     .version_id = 1,
   69:     .minimum_version_id = 1,
   70:     .minimum_version_id_old = 1,
   71:     .fields      = (VMStateField []) {
   72:         VMSTATE_UINT64(base, MTRRVar),
   73:         VMSTATE_UINT64(mask, MTRRVar),
   74:         VMSTATE_END_OF_LIST()
   75:     }
   76: };
   77: 
   78: #define VMSTATE_MTRR_VARS(_field, _state, _n, _v)                    \
   79:     VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_mtrr_var, MTRRVar)
   80: 
   81: static void put_fpreg_error(QEMUFile *f, void *opaque, size_t size)
   82: {
   83:     fprintf(stderr, "call put_fpreg() with invalid arguments\n");
   84:     exit(0);
   85: }
   86: 
   87: /* XXX: add that in a FPU generic layer */
   88: union x86_longdouble {
   89:     uint64_t mant;
   90:     uint16_t exp;
   91: };
   92: 
   93: #define MANTD1(fp)	(fp & ((1LL << 52) - 1))
   94: #define EXPBIAS1 1023
   95: #define EXPD1(fp)	((fp >> 52) & 0x7FF)
   96: #define SIGND1(fp)	((fp >> 32) & 0x80000000)
   97: 
   98: static void fp64_to_fp80(union x86_longdouble *p, uint64_t temp)
   99: {
  100:     int e;
  101:     /* mantissa */
  102:     p->mant = (MANTD1(temp) << 11) | (1LL << 63);
  103:     /* exponent + sign */
  104:     e = EXPD1(temp) - EXPBIAS1 + 16383;
  105:     e |= SIGND1(temp) >> 16;
  106:     p->exp = e;
  107: }
  108: 
  109: static int get_fpreg(QEMUFile *f, void *opaque, size_t size)
  110: {
  111:     FPReg *fp_reg = opaque;
  112:     uint64_t mant;
  113:     uint16_t exp;
  114: 
  115:     qemu_get_be64s(f, &mant);
  116:     qemu_get_be16s(f, &exp);
  117:     fp_reg->d = cpu_set_fp80(mant, exp);
  118:     return 0;
  119: }
  120: 
  121: static void put_fpreg(QEMUFile *f, void *opaque, size_t size)
  122: {
  123:     FPReg *fp_reg = opaque;
  124:     uint64_t mant;
  125:     uint16_t exp;
  126:     /* we save the real CPU data (in case of MMX usage only 'mant'
  127:        contains the MMX register */
  128:     cpu_get_fp80(&mant, &exp, fp_reg->d);
  129:     qemu_put_be64s(f, &mant);
  130:     qemu_put_be16s(f, &exp);
  131: }
  132: 
  133: static const VMStateInfo vmstate_fpreg = {
  134:     .name = "fpreg",
  135:     .get  = get_fpreg,
  136:     .put  = put_fpreg,
  137: };
  138: 
  139: static int get_fpreg_1_mmx(QEMUFile *f, void *opaque, size_t size)
  140: {
  141:     union x86_longdouble *p = opaque;
  142:     uint64_t mant;
  143: 
  144:     qemu_get_be64s(f, &mant);
  145:     p->mant = mant;
  146:     p->exp = 0xffff;
  147:     return 0;
  148: }
  149: 
  150: static const VMStateInfo vmstate_fpreg_1_mmx = {
  151:     .name = "fpreg_1_mmx",
  152:     .get  = get_fpreg_1_mmx,
  153:     .put  = put_fpreg_error,
  154: };
  155: 
  156: static int get_fpreg_1_no_mmx(QEMUFile *f, void *opaque, size_t size)
  157: {
  158:     union x86_longdouble *p = opaque;
  159:     uint64_t mant;
  160: 
  161:     qemu_get_be64s(f, &mant);
  162:     fp64_to_fp80(p, mant);
  163:     return 0;
  164: }
  165: 
  166: static const VMStateInfo vmstate_fpreg_1_no_mmx = {
  167:     .name = "fpreg_1_no_mmx",
  168:     .get  = get_fpreg_1_no_mmx,
  169:     .put  = put_fpreg_error,
  170: };
  171: 
  172: static bool fpregs_is_0(void *opaque, int version_id)
  173: {
  174:     CPUState *env = opaque;
  175: 
  176:     return (env->fpregs_format_vmstate == 0);
  177: }
  178: 
  179: static bool fpregs_is_1_mmx(void *opaque, int version_id)
  180: {
  181:     CPUState *env = opaque;
  182:     int guess_mmx;
  183: 
  184:     guess_mmx = ((env->fptag_vmstate == 0xff) &&
  185:                  (env->fpus_vmstate & 0x3800) == 0);
  186:     return (guess_mmx && (env->fpregs_format_vmstate == 1));
  187: }
  188: 
  189: static bool fpregs_is_1_no_mmx(void *opaque, int version_id)
  190: {
  191:     CPUState *env = opaque;
  192:     int guess_mmx;
  193: 
  194:     guess_mmx = ((env->fptag_vmstate == 0xff) &&
  195:                  (env->fpus_vmstate & 0x3800) == 0);
  196:     return (!guess_mmx && (env->fpregs_format_vmstate == 1));
  197: }
  198: 
  199: #define VMSTATE_FP_REGS(_field, _state, _n)                               \
  200:     VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_0, vmstate_fpreg, FPReg), \
  201:     VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_1_mmx, vmstate_fpreg_1_mmx, FPReg), \
  202:     VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_1_no_mmx, vmstate_fpreg_1_no_mmx, FPReg)
  203: 
  204: static bool version_is_5(void *opaque, int version_id)
  205: {
  206:     return version_id == 5;
  207: }
  208: 
  209: #ifdef TARGET_X86_64
  210: static bool less_than_7(void *opaque, int version_id)
  211: {
  212:     return version_id < 7;
  213: }
  214: 
  215: static int get_uint64_as_uint32(QEMUFile *f, void *pv, size_t size)
  216: {
  217:     uint64_t *v = pv;
  218:     *v = qemu_get_be32(f);
  219:     return 0;
  220: }
  221: 
  222: static void put_uint64_as_uint32(QEMUFile *f, void *pv, size_t size)
  223: {
  224:     uint64_t *v = pv;
  225:     qemu_put_be32(f, *v);
  226: }
  227: 
  228: static const VMStateInfo vmstate_hack_uint64_as_uint32 = {
  229:     .name = "uint64_as_uint32",
  230:     .get  = get_uint64_as_uint32,
  231:     .put  = put_uint64_as_uint32,
  232: };
  233: 
  234: #define VMSTATE_HACK_UINT32(_f, _s, _t)                                  \
  235:     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint64_as_uint32, uint64_t)
  236: #endif
  237: 
  238: static void cpu_pre_save(void *opaque)
  239: {
  240:     CPUState *env = opaque;
  241:     int i;
  242: 
  243:     /* FPU */
  244:     env->fpus_vmstate = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
  245:     env->fptag_vmstate = 0;
  246:     for(i = 0; i < 8; i++) {
  247:         env->fptag_vmstate |= ((!env->fptags[i]) << i);
  248:     }
  249: 
  250:     env->fpregs_format_vmstate = 0;
  251: }
  252: 
  253: static int cpu_post_load(void *opaque, int version_id)
  254: {
  255:     CPUState *env = opaque;
  256:     int i;
  257: 
  258:     /* XXX: restore FPU round state */
  259:     env->fpstt = (env->fpus_vmstate >> 11) & 7;
  260:     env->fpus = env->fpus_vmstate & ~0x3800;
  261:     env->fptag_vmstate ^= 0xff;
  262:     for(i = 0; i < 8; i++) {
  263:         env->fptags[i] = (env->fptag_vmstate >> i) & 1;
  264:     }
  265: 
  266:     cpu_breakpoint_remove_all(env, BP_CPU);
  267:     cpu_watchpoint_remove_all(env, BP_CPU);
  268:     for (i = 0; i < 4; i++)
  269:         hw_breakpoint_insert(env, i);
  270: 
  271:     tlb_flush(env, 1);
  272:     return 0;
  273: }
  274: 
  275: static bool async_pf_msr_needed(void *opaque)
  276: {
  277:     CPUState *cpu = opaque;
  278: 
  279:     return cpu->async_pf_en_msr != 0;
  280: }
  281: 
  282: static const VMStateDescription vmstate_async_pf_msr = {
  283:     .name = "cpu/async_pf_msr",
  284:     .version_id = 1,
  285:     .minimum_version_id = 1,
  286:     .minimum_version_id_old = 1,
  287:     .fields      = (VMStateField []) {
  288:         VMSTATE_UINT64(async_pf_en_msr, CPUState),
  289:         VMSTATE_END_OF_LIST()
  290:     }
  291: };
  292: 
  293: static bool fpop_ip_dp_needed(void *opaque)
  294: {
  295:     CPUState *env = opaque;
  296: 
  297:     return env->fpop != 0 || env->fpip != 0 || env->fpdp != 0;
  298: }
  299: 
  300: static const VMStateDescription vmstate_fpop_ip_dp = {
  301:     .name = "cpu/fpop_ip_dp",
  302:     .version_id = 1,
  303:     .minimum_version_id = 1,
  304:     .minimum_version_id_old = 1,
  305:     .fields      = (VMStateField []) {
  306:         VMSTATE_UINT16(fpop, CPUState),
  307:         VMSTATE_UINT64(fpip, CPUState),
  308:         VMSTATE_UINT64(fpdp, CPUState),
  309:         VMSTATE_END_OF_LIST()
  310:     }
  311: };
  312: 
  313: static const VMStateDescription vmstate_cpu = {
  314:     .name = "cpu",
  315:     .version_id = CPU_SAVE_VERSION,
  316:     .minimum_version_id = 3,
  317:     .minimum_version_id_old = 3,
  318:     .pre_save = cpu_pre_save,
  319:     .post_load = cpu_post_load,
  320:     .fields      = (VMStateField []) {
  321:         VMSTATE_UINTTL_ARRAY(regs, CPUState, CPU_NB_REGS),
  322:         VMSTATE_UINTTL(eip, CPUState),
  323:         VMSTATE_UINTTL(eflags, CPUState),
  324:         VMSTATE_UINT32(hflags, CPUState),
  325:         /* FPU */
  326:         VMSTATE_UINT16(fpuc, CPUState),
  327:         VMSTATE_UINT16(fpus_vmstate, CPUState),
  328:         VMSTATE_UINT16(fptag_vmstate, CPUState),
  329:         VMSTATE_UINT16(fpregs_format_vmstate, CPUState),
  330:         VMSTATE_FP_REGS(fpregs, CPUState, 8),
  331: 
  332:         VMSTATE_SEGMENT_ARRAY(segs, CPUState, 6),
  333:         VMSTATE_SEGMENT(ldt, CPUState),
  334:         VMSTATE_SEGMENT(tr, CPUState),
  335:         VMSTATE_SEGMENT(gdt, CPUState),
  336:         VMSTATE_SEGMENT(idt, CPUState),
  337: 
  338:         VMSTATE_UINT32(sysenter_cs, CPUState),
  339: #ifdef TARGET_X86_64
  340:         /* Hack: In v7 size changed from 32 to 64 bits on x86_64 */
  341:         VMSTATE_HACK_UINT32(sysenter_esp, CPUState, less_than_7),
  342:         VMSTATE_HACK_UINT32(sysenter_eip, CPUState, less_than_7),
  343:         VMSTATE_UINTTL_V(sysenter_esp, CPUState, 7),
  344:         VMSTATE_UINTTL_V(sysenter_eip, CPUState, 7),
  345: #else
  346:         VMSTATE_UINTTL(sysenter_esp, CPUState),
  347:         VMSTATE_UINTTL(sysenter_eip, CPUState),
  348: #endif
  349: 
  350:         VMSTATE_UINTTL(cr[0], CPUState),
  351:         VMSTATE_UINTTL(cr[2], CPUState),
  352:         VMSTATE_UINTTL(cr[3], CPUState),
  353:         VMSTATE_UINTTL(cr[4], CPUState),
  354:         VMSTATE_UINTTL_ARRAY(dr, CPUState, 8),
  355:         /* MMU */
  356:         VMSTATE_INT32(a20_mask, CPUState),
  357:         /* XMM */
  358:         VMSTATE_UINT32(mxcsr, CPUState),
  359:         VMSTATE_XMM_REGS(xmm_regs, CPUState, CPU_NB_REGS),
  360: 
  361: #ifdef TARGET_X86_64
  362:         VMSTATE_UINT64(efer, CPUState),
  363:         VMSTATE_UINT64(star, CPUState),
  364:         VMSTATE_UINT64(lstar, CPUState),
  365:         VMSTATE_UINT64(cstar, CPUState),
  366:         VMSTATE_UINT64(fmask, CPUState),
  367:         VMSTATE_UINT64(kernelgsbase, CPUState),
  368: #endif
  369:         VMSTATE_UINT32_V(smbase, CPUState, 4),
  370: 
  371:         VMSTATE_UINT64_V(pat, CPUState, 5),
  372:         VMSTATE_UINT32_V(hflags2, CPUState, 5),
  373: 
  374:         VMSTATE_UINT32_TEST(halted, CPUState, version_is_5),
  375:         VMSTATE_UINT64_V(vm_hsave, CPUState, 5),
  376:         VMSTATE_UINT64_V(vm_vmcb, CPUState, 5),
  377:         VMSTATE_UINT64_V(tsc_offset, CPUState, 5),
  378:         VMSTATE_UINT64_V(intercept, CPUState, 5),
  379:         VMSTATE_UINT16_V(intercept_cr_read, CPUState, 5),
  380:         VMSTATE_UINT16_V(intercept_cr_write, CPUState, 5),
  381:         VMSTATE_UINT16_V(intercept_dr_read, CPUState, 5),
  382:         VMSTATE_UINT16_V(intercept_dr_write, CPUState, 5),
  383:         VMSTATE_UINT32_V(intercept_exceptions, CPUState, 5),
  384:         VMSTATE_UINT8_V(v_tpr, CPUState, 5),
  385:         /* MTRRs */
  386:         VMSTATE_UINT64_ARRAY_V(mtrr_fixed, CPUState, 11, 8),
  387:         VMSTATE_UINT64_V(mtrr_deftype, CPUState, 8),
  388:         VMSTATE_MTRR_VARS(mtrr_var, CPUState, 8, 8),
  389:         /* KVM-related states */
  390:         VMSTATE_INT32_V(interrupt_injected, CPUState, 9),
  391:         VMSTATE_UINT32_V(mp_state, CPUState, 9),
  392:         VMSTATE_UINT64_V(tsc, CPUState, 9),
  393:         VMSTATE_INT32_V(exception_injected, CPUState, 11),
  394:         VMSTATE_UINT8_V(soft_interrupt, CPUState, 11),
  395:         VMSTATE_UINT8_V(nmi_injected, CPUState, 11),
  396:         VMSTATE_UINT8_V(nmi_pending, CPUState, 11),
  397:         VMSTATE_UINT8_V(has_error_code, CPUState, 11),
  398:         VMSTATE_UINT32_V(sipi_vector, CPUState, 11),
  399:         /* MCE */
  400:         VMSTATE_UINT64_V(mcg_cap, CPUState, 10),
  401:         VMSTATE_UINT64_V(mcg_status, CPUState, 10),
  402:         VMSTATE_UINT64_V(mcg_ctl, CPUState, 10),
  403:         VMSTATE_UINT64_ARRAY_V(mce_banks, CPUState, MCE_BANKS_DEF *4, 10),
  404:         /* rdtscp */
  405:         VMSTATE_UINT64_V(tsc_aux, CPUState, 11),
  406:         /* KVM pvclock msr */
  407:         VMSTATE_UINT64_V(system_time_msr, CPUState, 11),
  408:         VMSTATE_UINT64_V(wall_clock_msr, CPUState, 11),
  409:         /* XSAVE related fields */
  410:         VMSTATE_UINT64_V(xcr0, CPUState, 12),
  411:         VMSTATE_UINT64_V(xstate_bv, CPUState, 12),
  412:         VMSTATE_YMMH_REGS_VARS(ymmh_regs, CPUState, CPU_NB_REGS, 12),
  413:         VMSTATE_END_OF_LIST()
  414:         /* The above list is not sorted /wrt version numbers, watch out! */
  415:     },
  416:     .subsections = (VMStateSubsection []) {
  417:         {
  418:             .vmsd = &vmstate_async_pf_msr,
  419:             .needed = async_pf_msr_needed,
  420:         } , {
  421:             .vmsd = &vmstate_fpop_ip_dp,
  422:             .needed = fpop_ip_dp_needed,
  423:         } , {
  424:             /* empty */
  425:         }
  426:     }
  427: };
  428: 
  429: void cpu_save(QEMUFile *f, void *opaque)
  430: {
  431:     vmstate_save_state(f, &vmstate_cpu, opaque);
  432: }
  433: 
  434: int cpu_load(QEMUFile *f, void *opaque, int version_id)
  435: {
  436:     return vmstate_load_state(f, &vmstate_cpu, opaque, version_id);
  437: }

unix.superglobalmegacorp.com