/* * i386 helpers (without register variable usage) * * Copyright (c) 2003 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include "cpu.h" #include "exec-all.h" #include "svm.h" #include "qemu-common.h" //#define DEBUG_MMU static int cpu_x86_register (CPUX86State *env, const char *cpu_model); static void add_flagname_to_bitmaps(char *flagname, uint32_t *features, uint32_t *ext_features, uint32_t *ext2_features, uint32_t *ext3_features) { int i; /* feature flags taken from "Intel Processor Identification and the CPUID * Instruction" and AMD's "CPUID Specification". In cases of disagreement * about feature names, the Linux name is used. */ static const char *feature_name[] = { "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov", "pat", "pse36", "pn" /* Intel psn */, "clflush" /* Intel clfsh */, NULL, "ds" /* Intel dts */, "acpi", "mmx", "fxsr", "sse", "sse2", "ss", "ht" /* Intel htt */, "tm", "ia64", "pbe", }; static const char *ext_feature_name[] = { "pni" /* Intel,AMD sse3 */, NULL, NULL, "monitor", "ds_cpl", "vmx", NULL /* Linux smx */, "est", "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL, NULL, NULL, "dca", NULL, NULL, NULL, NULL, "popcnt", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, }; static const char *ext2_feature_name[] = { "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", "cx8" /* AMD CMPXCHG8B */, "apic", NULL, "syscall", "mttr", "pge", "mca", "cmov", "pat", "pse36", NULL, NULL /* Linux mp */, "nx" /* Intel xd */, NULL, "mmxext", "mmx", "fxsr", "fxsr_opt" /* AMD ffxsr */, "pdpe1gb" /* AMD Page1GB */, "rdtscp", NULL, "lm" /* Intel 64 */, "3dnowext", "3dnow", }; static const char *ext3_feature_name[] = { "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */, "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse", "3dnowprefetch", "osvw", NULL /* Linux ibs */, NULL, "skinit", "wdt", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, }; for ( i = 0 ; i < 32 ; i++ ) if (feature_name[i] && !strcmp (flagname, feature_name[i])) { *features |= 1 << i; return; } for ( i = 0 ; i < 32 ; i++ ) if (ext_feature_name[i] && !strcmp (flagname, ext_feature_name[i])) { *ext_features |= 1 << i; return; } for ( i = 0 ; i < 32 ; i++ ) if (ext2_feature_name[i] && !strcmp (flagname, ext2_feature_name[i])) { *ext2_features |= 1 << i; return; } for ( i = 0 ; i < 32 ; i++ ) if (ext3_feature_name[i] && !strcmp (flagname, ext3_feature_name[i])) { *ext3_features |= 1 << i; return; } fprintf(stderr, "CPU feature %s not found\n", flagname); } CPUX86State *cpu_x86_init(const char *cpu_model) { CPUX86State *env; static int inited; env = qemu_mallocz(sizeof(CPUX86State)); if (!env) return NULL; cpu_exec_init(env); env->cpu_model_str = cpu_model; /* init various static tables */ if (!inited) { inited = 1; optimize_flags_init(); } if (cpu_x86_register(env, cpu_model) < 0) { cpu_x86_close(env); return NULL; } cpu_reset(env); #ifdef USE_KQEMU kqemu_init(env); #endif return env; } typedef struct x86_def_t { const char *name; uint32_t level; uint32_t vendor1, vendor2, vendor3; int family; int model; int stepping; uint32_t features, ext_features, ext2_features, ext3_features; uint32_t xlevel; char model_id[48]; } x86_def_t; #define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE) #define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \ CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX) #define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \ CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \ CPUID_PSE36 | CPUID_FXSR) #define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE) #define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \ CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \ CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \ CPUID_PAE | CPUID_SEP | CPUID_APIC) static x86_def_t x86_defs[] = { #ifdef TARGET_X86_64 { .name = "qemu64", .level = 2, .vendor1 = 0x68747541, /* "Auth" */ .vendor2 = 0x69746e65, /* "enti" */ .vendor3 = 0x444d4163, /* "cAMD" */ .family = 6, .model = 2, .stepping = 3, .features = PPRO_FEATURES | /* these features are needed for Win64 and aren't fully implemented */ CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | /* this feature is needed for Solaris and isn't fully implemented */ CPUID_PSE36, .ext_features = CPUID_EXT_SSE3, .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT, .ext3_features = CPUID_EXT3_SVM, .xlevel = 0x8000000A, .model_id = "QEMU Virtual CPU version " QEMU_VERSION, }, #endif { .name = "qemu32", .level = 2, .family = 6, .model = 3, .stepping = 3, .features = PPRO_FEATURES, .ext_features = CPUID_EXT_SSE3, .xlevel = 0, .model_id = "QEMU Virtual CPU version " QEMU_VERSION, }, { .name = "486", .level = 0, .family = 4, .model = 0, .stepping = 0, .features = I486_FEATURES, .xlevel = 0, }, { .name = "pentium", .level = 1, .family = 5, .model = 4, .stepping = 3, .features = PENTIUM_FEATURES, .xlevel = 0, }, { .name = "pentium2", .level = 2, .family = 6, .model = 5, .stepping = 2, .features = PENTIUM2_FEATURES, .xlevel = 0, }, { .name = "pentium3", .level = 2, .family = 6, .model = 7, .stepping = 3, .features = PENTIUM3_FEATURES, .xlevel = 0, }, { .name = "athlon", .level = 2, .vendor1 = 0x68747541, /* "Auth" */ .vendor2 = 0x69746e65, /* "enti" */ .vendor3 = 0x444d4163, /* "cAMD" */ .family = 6, .model = 2, .stepping = 3, .features = PPRO_FEATURES | PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA, .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT, .xlevel = 0x80000008, /* XXX: put another string ? */ .model_id = "QEMU Virtual CPU version " QEMU_VERSION, }, }; static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model) { unsigned int i; x86_def_t *def; char *s = strdup(cpu_model); char *featurestr, *name = strtok(s, ","); uint32_t plus_features = 0, plus_ext_features = 0, plus_ext2_features = 0, plus_ext3_features = 0; uint32_t minus_features = 0, minus_ext_features = 0, minus_ext2_features = 0, minus_ext3_features = 0; int family = -1, model = -1, stepping = -1; def = NULL; for (i = 0; i < sizeof(x86_defs) / sizeof(x86_def_t); i++) { if (strcmp(name, x86_defs[i].name) == 0) { def = &x86_defs[i]; break; } } if (!def) goto error; memcpy(x86_cpu_def, def, sizeof(*def)); featurestr = strtok(NULL, ","); while (featurestr) { char *val; if (featurestr[0] == '+') { add_flagname_to_bitmaps(featurestr + 1, &plus_features, &plus_ext_features, &plus_ext2_features, &plus_ext3_features); } else if (featurestr[0] == '-') { add_flagname_to_bitmaps(featurestr + 1, &minus_features, &minus_ext_features, &minus_ext2_features, &minus_ext3_features); } else if ((val = strchr(featurestr, '='))) { *val = 0; val++; if (!strcmp(featurestr, "family")) { char *err; family = strtol(val, &err, 10); if (!*val || *err || family < 0) { fprintf(stderr, "bad numerical value %s\n", val); goto error; } x86_cpu_def->family = family; } else if (!strcmp(featurestr, "model")) { char *err; model = strtol(val, &err, 10); if (!*val || *err || model < 0 || model > 0xf) { fprintf(stderr, "bad numerical value %s\n", val); goto error; } x86_cpu_def->model = model; } else if (!strcmp(featurestr, "stepping")) { char *err; stepping = strtol(val, &err, 10); if (!*val || *err || stepping < 0 || stepping > 0xf) { fprintf(stderr, "bad numerical value %s\n", val); goto error; } x86_cpu_def->stepping = stepping; } else if (!strcmp(featurestr, "vendor")) { if (strlen(val) != 12) { fprintf(stderr, "vendor string must be 12 chars long\n"); goto error; } x86_cpu_def->vendor1 = 0; x86_cpu_def->vendor2 = 0; x86_cpu_def->vendor3 = 0; for(i = 0; i < 4; i++) { x86_cpu_def->vendor1 |= ((uint8_t)val[i ]) << (8 * i); x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i); x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i); } } else if (!strcmp(featurestr, "model_id")) { pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id), val); } else { fprintf(stderr, "unrecognized feature %s\n", featurestr); goto error; } } else { fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr); goto error; } featurestr = strtok(NULL, ","); } x86_cpu_def->features |= plus_features; x86_cpu_def->ext_features |= plus_ext_features; x86_cpu_def->ext2_features |= plus_ext2_features; x86_cpu_def->ext3_features |= plus_ext3_features; x86_cpu_def->features &= ~minus_features; x86_cpu_def->ext_features &= ~minus_ext_features; x86_cpu_def->ext2_features &= ~minus_ext2_features; x86_cpu_def->ext3_features &= ~minus_ext3_features; free(s); return 0; error: free(s); return -1; } void x86_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) { unsigned int i; for (i = 0; i < sizeof(x86_defs) / sizeof(x86_def_t); i++) (*cpu_fprintf)(f, "x86 %16s\n", x86_defs[i].name); } static int cpu_x86_register (CPUX86State *env, const char *cpu_model) { x86_def_t def1, *def = &def1; if (cpu_x86_find_by_name(def, cpu_model) < 0) return -1; if (def->vendor1) { env->cpuid_vendor1 = def->vendor1; env->cpuid_vendor2 = def->vendor2; env->cpuid_vendor3 = def->vendor3; } else { env->cpuid_vendor1 = 0x756e6547; /* "Genu" */ env->cpuid_vendor2 = 0x49656e69; /* "ineI" */ env->cpuid_vendor3 = 0x6c65746e; /* "ntel" */ } env->cpuid_level = def->level; env->cpuid_version = (def->family << 8) | (def->model << 4) | def->stepping; env->cpuid_features = def->features; env->pat = 0x0007040600070406ULL; env->cpuid_ext_features = def->ext_features; env->cpuid_ext2_features = def->ext2_features; env->cpuid_xlevel = def->xlevel; env->cpuid_ext3_features = def->ext3_features; { const char *model_id = def->model_id; int c, len, i; if (!model_id) model_id = ""; len = strlen(model_id); for(i = 0; i < 48; i++) { if (i >= len) c = '\0'; else c = (uint8_t)model_id[i]; env->cpuid_model[i >> 2] |= c << (8 * (i & 3)); } } return 0; } /* NOTE: must be called outside the CPU execute loop */ void cpu_reset(CPUX86State *env) { int i; memset(env, 0, offsetof(CPUX86State, breakpoints)); tlb_flush(env, 1); env->old_exception = -1; /* init to reset state */ #ifdef CONFIG_SOFTMMU env->hflags |= HF_SOFTMMU_MASK; #endif env->hflags2 |= HF2_GIF_MASK; cpu_x86_update_cr0(env, 0x60000010); env->a20_mask = ~0x0; env->smbase = 0x30000; env->idt.limit = 0xffff; env->gdt.limit = 0xffff; env->ldt.limit = 0xffff; env->ldt.flags = DESC_P_MASK | (2 << DESC_TYPE_SHIFT); env->tr.limit = 0xffff; env->tr.flags = DESC_P_MASK | (11 < DESC_TYPE_SHIFT); cpu_x86_load_seg_cache(env, R_CS, 0xf000, 0xffff0000, 0xffff, DESC_P_MASK | DESC_S_MASK | DESC_CS_MASK | DESC_R_MASK); cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffff, DESC_P_MASK | DESC_S_MASK | DESC_W_MASK); cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffff, DESC_P_MASK | DESC_S_MASK | DESC_W_MASK); cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffff, DESC_P_MASK | DESC_S_MASK | DESC_W_MASK); cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffff, DESC_P_MASK | DESC_S_MASK | DESC_W_MASK); cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffff, DESC_P_MASK | DESC_S_MASK | DESC_W_MASK); env->eip = 0xfff0; env->regs[R_EDX] = env->cpuid_version; env->eflags = 0x2; /* FPU init */ for(i = 0;i < 8; i++) env->fptags[i] = 1; env->fpuc = 0x37f; env->mxcsr = 0x1f80; } void cpu_x86_close(CPUX86State *env) { free(env); } /***********************************************************/ /* x86 debug */ static const char *cc_op_str[] = { "DYNAMIC", "EFLAGS", "MULB", "MULW", "MULL", "MULQ", "ADDB", "ADDW", "ADDL", "ADDQ", "ADCB", "ADCW", "ADCL", "ADCQ", "SUBB", "SUBW", "SUBL", "SUBQ", "SBBB", "SBBW", "SBBL", "SBBQ", "LOGICB", "LOGICW", "LOGICL", "LOGICQ", "INCB", "INCW", "INCL", "INCQ", "DECB", "DECW", "DECL", "DECQ", "SHLB", "SHLW", "SHLL", "SHLQ", "SARB", "SARW", "SARL", "SARQ", }; void cpu_dump_state(CPUState *env, FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...), int flags) { int eflags, i, nb; char cc_op_name[32]; static const char *seg_name[6] = { "ES", "CS", "SS", "DS", "FS", "GS" }; eflags = env->eflags; #ifdef TARGET_X86_64 if (env->hflags & HF_CS64_MASK) { cpu_fprintf(f, "RAX=%016" PRIx64 " RBX=%016" PRIx64 " RCX=%016" PRIx64 " RDX=%016" PRIx64 "\n" "RSI=%016" PRIx64 " RDI=%016" PRIx64 " RBP=%016" PRIx64 " RSP=%016" PRIx64 "\n" "R8 =%016" PRIx64 " R9 =%016" PRIx64 " R10=%016" PRIx64 " R11=%016" PRIx64 "\n" "R12=%016" PRIx64 " R13=%016" PRIx64 " R14=%016" PRIx64 " R15=%016" PRIx64 "\n" "RIP=%016" PRIx64 " RFL=%08x [%c%c%c%c%c%c%c] CPL=%d II=%d A20=%d SMM=%d HLT=%d\n", env->regs[R_EAX], env->regs[R_EBX], env->regs[R_ECX], env->regs[R_EDX], env->regs[R_ESI], env->regs[R_EDI], env->regs[R_EBP], env->regs[R_ESP], env->regs[8], env->regs[9], env->regs[10], env->regs[11], env->regs[12], env->regs[13], env->regs[14], env->regs[15], env->eip, eflags, eflags & DF_MASK ? 'D' : '-', eflags & CC_O ? 'O' : '-', eflags & CC_S ? 'S' : '-', eflags & CC_Z ? 'Z' : '-', eflags & CC_A ? 'A' : '-', eflags & CC_P ? 'P' : '-', eflags & CC_C ? 'C' : '-', env->hflags & HF_CPL_MASK, (env->hflags >> HF_INHIBIT_IRQ_SHIFT) & 1, (int)(env->a20_mask >> 20) & 1, (env->hflags >> HF_SMM_SHIFT) & 1, env->halted); } else #endif { cpu_fprintf(f, "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n" "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n" "EIP=%08x EFL=%08x [%c%c%c%c%c%c%c] CPL=%d II=%d A20=%d SMM=%d HLT=%d\n", (uint32_t)env->regs[R_EAX], (uint32_t)env->regs[R_EBX], (uint32_t)env->regs[R_ECX], (uint32_t)env->regs[R_EDX], (uint32_t)env->regs[R_ESI], (uint32_t)env->regs[R_EDI], (uint32_t)env->regs[R_EBP], (uint32_t)env->regs[R_ESP], (uint32_t)env->eip, eflags, eflags & DF_MASK ? 'D' : '-', eflags & CC_O ? 'O' : '-', eflags & CC_S ? 'S' : '-', eflags & CC_Z ? 'Z' : '-', eflags & CC_A ? 'A' : '-', eflags & CC_P ? 'P' : '-', eflags & CC_C ? 'C' : '-', env->hflags & HF_CPL_MASK, (env->hflags >> HF_INHIBIT_IRQ_SHIFT) & 1, (int)(env->a20_mask >> 20) & 1, (env->hflags >> HF_SMM_SHIFT) & 1, env->halted); } #ifdef TARGET_X86_64 if (env->hflags & HF_LMA_MASK) { for(i = 0; i < 6; i++) { SegmentCache *sc = &env->segs[i]; cpu_fprintf(f, "%s =%04x %016" PRIx64 " %08x %08x\n", seg_name[i], sc->selector, sc->base, sc->limit, sc->flags); } cpu_fprintf(f, "LDT=%04x %016" PRIx64 " %08x %08x\n", env->ldt.selector, env->ldt.base, env->ldt.limit, env->ldt.flags); cpu_fprintf(f, "TR =%04x %016" PRIx64 " %08x %08x\n", env->tr.selector, env->tr.base, env->tr.limit, env->tr.flags); cpu_fprintf(f, "GDT= %016" PRIx64 " %08x\n", env->gdt.base, env->gdt.limit); cpu_fprintf(f, "IDT= %016" PRIx64 " %08x\n", env->idt.base, env->idt.limit); cpu_fprintf(f, "CR0=%08x CR2=%016" PRIx64 " CR3=%016" PRIx64 " CR4=%08x\n", (uint32_t)env->cr[0], env->cr[2], env->cr[3], (uint32_t)env->cr[4]); } else #endif { for(i = 0; i < 6; i++) { SegmentCache *sc = &env->segs[i]; cpu_fprintf(f, "%s =%04x %08x %08x %08x\n", seg_name[i], sc->selector, (uint32_t)sc->base, sc->limit, sc->flags); } cpu_fprintf(f, "LDT=%04x %08x %08x %08x\n", env->ldt.selector, (uint32_t)env->ldt.base, env->ldt.limit, env->ldt.flags); cpu_fprintf(f, "TR =%04x %08x %08x %08x\n", env->tr.selector, (uint32_t)env->tr.base, env->tr.limit, env->tr.flags); cpu_fprintf(f, "GDT= %08x %08x\n", (uint32_t)env->gdt.base, env->gdt.limit); cpu_fprintf(f, "IDT= %08x %08x\n", (uint32_t)env->idt.base, env->idt.limit); cpu_fprintf(f, "CR0=%08x CR2=%08x CR3=%08x CR4=%08x\n", (uint32_t)env->cr[0], (uint32_t)env->cr[2], (uint32_t)env->cr[3], (uint32_t)env->cr[4]); } if (flags & X86_DUMP_CCOP) { if ((unsigned)env->cc_op < CC_OP_NB) snprintf(cc_op_name, sizeof(cc_op_name), "%s", cc_op_str[env->cc_op]); else snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op); #ifdef TARGET_X86_64 if (env->hflags & HF_CS64_MASK) { cpu_fprintf(f, "CCS=%016" PRIx64 " CCD=%016" PRIx64 " CCO=%-8s\n", env->cc_src, env->cc_dst, cc_op_name); } else #endif { cpu_fprintf(f, "CCS=%08x CCD=%08x CCO=%-8s\n", (uint32_t)env->cc_src, (uint32_t)env->cc_dst, cc_op_name); } } if (flags & X86_DUMP_FPU) { int fptag; fptag = 0; for(i = 0; i < 8; i++) { fptag |= ((!env->fptags[i]) << i); } cpu_fprintf(f, "FCW=%04x FSW=%04x [ST=%d] FTW=%02x MXCSR=%08x\n", env->fpuc, (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11, env->fpstt, fptag, env->mxcsr); for(i=0;i<8;i++) { #if defined(USE_X86LDOUBLE) union { long double d; struct { uint64_t lower; uint16_t upper; } l; } tmp; tmp.d = env->fpregs[i].d; cpu_fprintf(f, "FPR%d=%016" PRIx64 " %04x", i, tmp.l.lower, tmp.l.upper); #else cpu_fprintf(f, "FPR%d=%016" PRIx64, i, env->fpregs[i].mmx.q); #endif if ((i & 1) == 1) cpu_fprintf(f, "\n"); else cpu_fprintf(f, " "); } if (env->hflags & HF_CS64_MASK) nb = 16; else nb = 8; for(i=0;ixmm_regs[i].XMM_L(3), env->xmm_regs[i].XMM_L(2), env->xmm_regs[i].XMM_L(1), env->xmm_regs[i].XMM_L(0)); if ((i & 1) == 1) cpu_fprintf(f, "\n"); else cpu_fprintf(f, " "); } } } /***********************************************************/ /* x86 mmu */ /* XXX: add PGE support */ void cpu_x86_set_a20(CPUX86State *env, int a20_state) { a20_state = (a20_state != 0); if (a20_state != ((env->a20_mask >> 20) & 1)) { #if defined(DEBUG_MMU) printf("A20 update: a20=%d\n", a20_state); #endif /* if the cpu is currently executing code, we must unlink it and all the potentially executing TB */ cpu_interrupt(env, CPU_INTERRUPT_EXITTB); /* when a20 is changed, all the MMU mappings are invalid, so we must flush everything */ tlb_flush(env, 1); env->a20_mask = (~0x100000) | (a20_state << 20); } } void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0) { int pe_state; #if defined(DEBUG_MMU) printf("CR0 update: CR0=0x%08x\n", new_cr0); #endif if ((new_cr0 & (CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK)) != (env->cr[0] & (CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK))) { tlb_flush(env, 1); } #ifdef TARGET_X86_64 if (!(env->cr[0] & CR0_PG_MASK) && (new_cr0 & CR0_PG_MASK) && (env->efer & MSR_EFER_LME)) { /* enter in long mode */ /* XXX: generate an exception */ if (!(env->cr[4] & CR4_PAE_MASK)) return; env->efer |= MSR_EFER_LMA; env->hflags |= HF_LMA_MASK; } else if ((env->cr[0] & CR0_PG_MASK) && !(new_cr0 & CR0_PG_MASK) && (env->efer & MSR_EFER_LMA)) { /* exit long mode */ env->efer &= ~MSR_EFER_LMA; env->hflags &= ~(HF_LMA_MASK | HF_CS64_MASK); env->eip &= 0xffffffff; } #endif env->cr[0] = new_cr0 | CR0_ET_MASK; /* update PE flag in hidden flags */ pe_state = (env->cr[0] & CR0_PE_MASK); env->hflags = (env->hflags & ~HF_PE_MASK) | (pe_state << HF_PE_SHIFT); /* ensure that ADDSEG is always set in real mode */ env->hflags |= ((pe_state ^ 1) << HF_ADDSEG_SHIFT); /* update FPU flags */ env->hflags = (env->hflags & ~(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)) | ((new_cr0 << (HF_MP_SHIFT - 1)) & (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)); } /* XXX: in legacy PAE mode, generate a GPF if reserved bits are set in the PDPT */ void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3) { env->cr[3] = new_cr3; if (env->cr[0] & CR0_PG_MASK) { #if defined(DEBUG_MMU) printf("CR3 update: CR3=" TARGET_FMT_lx "\n", new_cr3); #endif tlb_flush(env, 0); } } void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4) { #if defined(DEBUG_MMU) printf("CR4 update: CR4=%08x\n", (uint32_t)env->cr[4]); #endif if ((new_cr4 & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK)) != (env->cr[4] & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK))) { tlb_flush(env, 1); } /* SSE handling */ if (!(env->cpuid_features & CPUID_SSE)) new_cr4 &= ~CR4_OSFXSR_MASK; if (new_cr4 & CR4_OSFXSR_MASK) env->hflags |= HF_OSFXSR_MASK; else env->hflags &= ~HF_OSFXSR_MASK; env->cr[4] = new_cr4; } /* XXX: also flush 4MB pages */ void cpu_x86_flush_tlb(CPUX86State *env, target_ulong addr) { tlb_flush_page(env, addr); } #if defined(CONFIG_USER_ONLY) int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr, int is_write, int mmu_idx, int is_softmmu) { /* user mode only emulation */ is_write &= 1; env->cr[2] = addr; env->error_code = (is_write << PG_ERROR_W_BIT); env->error_code |= PG_ERROR_U_MASK; env->exception_index = EXCP0E_PAGE; return 1; } target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) { return addr; } #else /* XXX: This value should match the one returned by CPUID * and in exec.c */ #if defined(USE_KQEMU) #define PHYS_ADDR_MASK 0xfffff000LL #else # if defined(TARGET_X86_64) # define PHYS_ADDR_MASK 0xfffffff000LL # else # define PHYS_ADDR_MASK 0xffffff000LL # endif #endif /* return value: -1 = cannot handle fault 0 = nothing more to do 1 = generate PF fault 2 = soft MMU activation required for this block */ int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr, int is_write1, int mmu_idx, int is_softmmu) { uint64_t ptep, pte; target_ulong pde_addr, pte_addr; int error_code, is_dirty, prot, page_size, ret, is_write, is_user; target_phys_addr_t paddr; uint32_t page_offset; target_ulong vaddr, virt_addr; is_user = mmu_idx == MMU_USER_IDX; #if defined(DEBUG_MMU) printf("MMU fault: addr=" TARGET_FMT_lx " w=%d u=%d eip=" TARGET_FMT_lx "\n", addr, is_write1, is_user, env->eip); #endif is_write = is_write1 & 1; if (!(env->cr[0] & CR0_PG_MASK)) { pte = addr; virt_addr = addr & TARGET_PAGE_MASK; prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; page_size = 4096; goto do_mapping; } if (env->cr[4] & CR4_PAE_MASK) { uint64_t pde, pdpe; target_ulong pdpe_addr; #ifdef TARGET_X86_64 if (env->hflags & HF_LMA_MASK) { uint64_t pml4e_addr, pml4e; int32_t sext; /* test virtual address sign extension */ sext = (int64_t)addr >> 47; if (sext != 0 && sext != -1) { env->error_code = 0; env->exception_index = EXCP0D_GPF; return 1; } pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) & env->a20_mask; pml4e = ldq_phys(pml4e_addr); if (!(pml4e & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } if (!(env->efer & MSR_EFER_NXE) && (pml4e & PG_NX_MASK)) { error_code = PG_ERROR_RSVD_MASK; goto do_fault; } if (!(pml4e & PG_ACCESSED_MASK)) { pml4e |= PG_ACCESSED_MASK; stl_phys_notdirty(pml4e_addr, pml4e); } ptep = pml4e ^ PG_NX_MASK; pdpe_addr = ((pml4e & PHYS_ADDR_MASK) + (((addr >> 30) & 0x1ff) << 3)) & env->a20_mask; pdpe = ldq_phys(pdpe_addr); if (!(pdpe & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } if (!(env->efer & MSR_EFER_NXE) && (pdpe & PG_NX_MASK)) { error_code = PG_ERROR_RSVD_MASK; goto do_fault; } ptep &= pdpe ^ PG_NX_MASK; if (!(pdpe & PG_ACCESSED_MASK)) { pdpe |= PG_ACCESSED_MASK; stl_phys_notdirty(pdpe_addr, pdpe); } } else #endif { /* XXX: load them when cr3 is loaded ? */ pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) & env->a20_mask; pdpe = ldq_phys(pdpe_addr); if (!(pdpe & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } ptep = PG_NX_MASK | PG_USER_MASK | PG_RW_MASK; } pde_addr = ((pdpe & PHYS_ADDR_MASK) + (((addr >> 21) & 0x1ff) << 3)) & env->a20_mask; pde = ldq_phys(pde_addr); if (!(pde & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } if (!(env->efer & MSR_EFER_NXE) && (pde & PG_NX_MASK)) { error_code = PG_ERROR_RSVD_MASK; goto do_fault; } ptep &= pde ^ PG_NX_MASK; if (pde & PG_PSE_MASK) { /* 2 MB page */ page_size = 2048 * 1024; ptep ^= PG_NX_MASK; if ((ptep & PG_NX_MASK) && is_write1 == 2) goto do_fault_protect; if (is_user) { if (!(ptep & PG_USER_MASK)) goto do_fault_protect; if (is_write && !(ptep & PG_RW_MASK)) goto do_fault_protect; } else { if ((env->cr[0] & CR0_WP_MASK) && is_write && !(ptep & PG_RW_MASK)) goto do_fault_protect; } is_dirty = is_write && !(pde & PG_DIRTY_MASK); if (!(pde & PG_ACCESSED_MASK) || is_dirty) { pde |= PG_ACCESSED_MASK; if (is_dirty) pde |= PG_DIRTY_MASK; stl_phys_notdirty(pde_addr, pde); } /* align to page_size */ pte = pde & ((PHYS_ADDR_MASK & ~(page_size - 1)) | 0xfff); virt_addr = addr & ~(page_size - 1); } else { /* 4 KB page */ if (!(pde & PG_ACCESSED_MASK)) { pde |= PG_ACCESSED_MASK; stl_phys_notdirty(pde_addr, pde); } pte_addr = ((pde & PHYS_ADDR_MASK) + (((addr >> 12) & 0x1ff) << 3)) & env->a20_mask; pte = ldq_phys(pte_addr); if (!(pte & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } if (!(env->efer & MSR_EFER_NXE) && (pte & PG_NX_MASK)) { error_code = PG_ERROR_RSVD_MASK; goto do_fault; } /* combine pde and pte nx, user and rw protections */ ptep &= pte ^ PG_NX_MASK; ptep ^= PG_NX_MASK; if ((ptep & PG_NX_MASK) && is_write1 == 2) goto do_fault_protect; if (is_user) { if (!(ptep & PG_USER_MASK)) goto do_fault_protect; if (is_write && !(ptep & PG_RW_MASK)) goto do_fault_protect; } else { if ((env->cr[0] & CR0_WP_MASK) && is_write && !(ptep & PG_RW_MASK)) goto do_fault_protect; } is_dirty = is_write && !(pte & PG_DIRTY_MASK); if (!(pte & PG_ACCESSED_MASK) || is_dirty) { pte |= PG_ACCESSED_MASK; if (is_dirty) pte |= PG_DIRTY_MASK; stl_phys_notdirty(pte_addr, pte); } page_size = 4096; virt_addr = addr & ~0xfff; pte = pte & (PHYS_ADDR_MASK | 0xfff); } } else { uint32_t pde; /* page directory entry */ pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & env->a20_mask; pde = ldl_phys(pde_addr); if (!(pde & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } /* if PSE bit is set, then we use a 4MB page */ if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) { page_size = 4096 * 1024; if (is_user) { if (!(pde & PG_USER_MASK)) goto do_fault_protect; if (is_write && !(pde & PG_RW_MASK)) goto do_fault_protect; } else { if ((env->cr[0] & CR0_WP_MASK) && is_write && !(pde & PG_RW_MASK)) goto do_fault_protect; } is_dirty = is_write && !(pde & PG_DIRTY_MASK); if (!(pde & PG_ACCESSED_MASK) || is_dirty) { pde |= PG_ACCESSED_MASK; if (is_dirty) pde |= PG_DIRTY_MASK; stl_phys_notdirty(pde_addr, pde); } pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */ ptep = pte; virt_addr = addr & ~(page_size - 1); } else { if (!(pde & PG_ACCESSED_MASK)) { pde |= PG_ACCESSED_MASK; stl_phys_notdirty(pde_addr, pde); } /* page directory entry */ pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & env->a20_mask; pte = ldl_phys(pte_addr); if (!(pte & PG_PRESENT_MASK)) { error_code = 0; goto do_fault; } /* combine pde and pte user and rw protections */ ptep = pte & pde; if (is_user) { if (!(ptep & PG_USER_MASK)) goto do_fault_protect; if (is_write && !(ptep & PG_RW_MASK)) goto do_fault_protect; } else { if ((env->cr[0] & CR0_WP_MASK) && is_write && !(ptep & PG_RW_MASK)) goto do_fault_protect; } is_dirty = is_write && !(pte & PG_DIRTY_MASK); if (!(pte & PG_ACCESSED_MASK) || is_dirty) { pte |= PG_ACCESSED_MASK; if (is_dirty) pte |= PG_DIRTY_MASK; stl_phys_notdirty(pte_addr, pte); } page_size = 4096; virt_addr = addr & ~0xfff; } } /* the page can be put in the TLB */ prot = PAGE_READ; if (!(ptep & PG_NX_MASK)) prot |= PAGE_EXEC; if (pte & PG_DIRTY_MASK) { /* only set write access if already dirty... otherwise wait for dirty access */ if (is_user) { if (ptep & PG_RW_MASK) prot |= PAGE_WRITE; } else { if (!(env->cr[0] & CR0_WP_MASK) || (ptep & PG_RW_MASK)) prot |= PAGE_WRITE; } } do_mapping: pte = pte & env->a20_mask; /* Even if 4MB pages, we map only one 4KB page in the cache to avoid filling it too fast */ page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1); paddr = (pte & TARGET_PAGE_MASK) + page_offset; vaddr = virt_addr + page_offset; ret = tlb_set_page_exec(env, vaddr, paddr, prot, mmu_idx, is_softmmu); return ret; do_fault_protect: error_code = PG_ERROR_P_MASK; do_fault: error_code |= (is_write << PG_ERROR_W_BIT); if (is_user) error_code |= PG_ERROR_U_MASK; if (is_write1 == 2 && (env->efer & MSR_EFER_NXE) && (env->cr[4] & CR4_PAE_MASK)) error_code |= PG_ERROR_I_D_MASK; if (env->intercept_exceptions & (1 << EXCP0E_PAGE)) { /* cr2 is not modified in case of exceptions */ stq_phys(env->vm_vmcb + offsetof(struct vmcb, control.exit_info_2), addr); } else { env->cr[2] = addr; } env->error_code = error_code; env->exception_index = EXCP0E_PAGE; return 1; } target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) { target_ulong pde_addr, pte_addr; uint64_t pte; target_phys_addr_t paddr; uint32_t page_offset; int page_size; if (env->cr[4] & CR4_PAE_MASK) { target_ulong pdpe_addr; uint64_t pde, pdpe; #ifdef TARGET_X86_64 if (env->hflags & HF_LMA_MASK) { uint64_t pml4e_addr, pml4e; int32_t sext; /* test virtual address sign extension */ sext = (int64_t)addr >> 47; if (sext != 0 && sext != -1) return -1; pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) & env->a20_mask; pml4e = ldq_phys(pml4e_addr); if (!(pml4e & PG_PRESENT_MASK)) return -1; pdpe_addr = ((pml4e & ~0xfff) + (((addr >> 30) & 0x1ff) << 3)) & env->a20_mask; pdpe = ldq_phys(pdpe_addr); if (!(pdpe & PG_PRESENT_MASK)) return -1; } else #endif { pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) & env->a20_mask; pdpe = ldq_phys(pdpe_addr); if (!(pdpe & PG_PRESENT_MASK)) return -1; } pde_addr = ((pdpe & ~0xfff) + (((addr >> 21) & 0x1ff) << 3)) & env->a20_mask; pde = ldq_phys(pde_addr); if (!(pde & PG_PRESENT_MASK)) { return -1; } if (pde & PG_PSE_MASK) { /* 2 MB page */ page_size = 2048 * 1024; pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */ } else { /* 4 KB page */ pte_addr = ((pde & ~0xfff) + (((addr >> 12) & 0x1ff) << 3)) & env->a20_mask; page_size = 4096; pte = ldq_phys(pte_addr); } } else { uint32_t pde; if (!(env->cr[0] & CR0_PG_MASK)) { pte = addr; page_size = 4096; } else { /* page directory entry */ pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & env->a20_mask; pde = ldl_phys(pde_addr); if (!(pde & PG_PRESENT_MASK)) return -1; if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) { pte = pde & ~0x003ff000; /* align to 4MB */ page_size = 4096 * 1024; } else { /* page directory entry */ pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & env->a20_mask; pte = ldl_phys(pte_addr); if (!(pte & PG_PRESENT_MASK)) return -1; page_size = 4096; } } pte = pte & env->a20_mask; } page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1); paddr = (pte & TARGET_PAGE_MASK) + page_offset; return paddr; } #endif /* !CONFIG_USER_ONLY */