1 /* 2 * i386 TCG cpu class initialization 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, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "cpu.h" 22 #include "helper-tcg.h" 23 #include "qemu/accel.h" 24 #include "hw/core/accel-cpu.h" 25 26 #include "tcg-cpu.h" 27 28 /* Frob eflags into and out of the CPU temporary format. */ 29 30 static void x86_cpu_exec_enter(CPUState *cs) 31 { 32 X86CPU *cpu = X86_CPU(cs); 33 CPUX86State *env = &cpu->env; 34 35 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); 36 env->df = 1 - (2 * ((env->eflags >> 10) & 1)); 37 CC_OP = CC_OP_EFLAGS; 38 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); 39 } 40 41 static void x86_cpu_exec_exit(CPUState *cs) 42 { 43 X86CPU *cpu = X86_CPU(cs); 44 CPUX86State *env = &cpu->env; 45 46 env->eflags = cpu_compute_eflags(env); 47 } 48 49 static void x86_cpu_synchronize_from_tb(CPUState *cs, 50 const TranslationBlock *tb) 51 { 52 /* The instruction pointer is always up to date with CF_PCREL. */ 53 if (!(tb_cflags(tb) & CF_PCREL)) { 54 CPUX86State *env = cs->env_ptr; 55 env->eip = tb->pc - tb->cs_base; 56 } 57 } 58 59 static void x86_restore_state_to_opc(CPUState *cs, 60 const TranslationBlock *tb, 61 const uint64_t *data) 62 { 63 X86CPU *cpu = X86_CPU(cs); 64 CPUX86State *env = &cpu->env; 65 int cc_op = data[1]; 66 67 if (tb_cflags(tb) & CF_PCREL) { 68 env->eip = (env->eip & TARGET_PAGE_MASK) | data[0]; 69 } else { 70 env->eip = data[0] - tb->cs_base; 71 } 72 if (cc_op != CC_OP_DYNAMIC) { 73 env->cc_op = cc_op; 74 } 75 } 76 77 #ifndef CONFIG_USER_ONLY 78 static bool x86_debug_check_breakpoint(CPUState *cs) 79 { 80 X86CPU *cpu = X86_CPU(cs); 81 CPUX86State *env = &cpu->env; 82 83 /* RF disables all architectural breakpoints. */ 84 return !(env->eflags & RF_MASK); 85 } 86 #endif 87 88 #include "hw/core/tcg-cpu-ops.h" 89 90 static const struct TCGCPUOps x86_tcg_ops = { 91 .initialize = tcg_x86_init, 92 .synchronize_from_tb = x86_cpu_synchronize_from_tb, 93 .restore_state_to_opc = x86_restore_state_to_opc, 94 .cpu_exec_enter = x86_cpu_exec_enter, 95 .cpu_exec_exit = x86_cpu_exec_exit, 96 #ifdef CONFIG_USER_ONLY 97 .fake_user_interrupt = x86_cpu_do_interrupt, 98 .record_sigsegv = x86_cpu_record_sigsegv, 99 .record_sigbus = x86_cpu_record_sigbus, 100 #else 101 .tlb_fill = x86_cpu_tlb_fill, 102 .do_interrupt = x86_cpu_do_interrupt, 103 .cpu_exec_interrupt = x86_cpu_exec_interrupt, 104 .do_unaligned_access = x86_cpu_do_unaligned_access, 105 .debug_excp_handler = breakpoint_handler, 106 .debug_check_breakpoint = x86_debug_check_breakpoint, 107 #endif /* !CONFIG_USER_ONLY */ 108 }; 109 110 static void tcg_cpu_init_ops(AccelCPUClass *accel_cpu, CPUClass *cc) 111 { 112 /* for x86, all cpus use the same set of operations */ 113 cc->tcg_ops = &x86_tcg_ops; 114 } 115 116 static void tcg_cpu_class_init(CPUClass *cc) 117 { 118 cc->init_accel_cpu = tcg_cpu_init_ops; 119 } 120 121 static void tcg_cpu_xsave_init(void) 122 { 123 #define XO(bit, field) \ 124 x86_ext_save_areas[bit].offset = offsetof(X86XSaveArea, field); 125 126 XO(XSTATE_FP_BIT, legacy); 127 XO(XSTATE_SSE_BIT, legacy); 128 XO(XSTATE_YMM_BIT, avx_state); 129 XO(XSTATE_BNDREGS_BIT, bndreg_state); 130 XO(XSTATE_BNDCSR_BIT, bndcsr_state); 131 XO(XSTATE_OPMASK_BIT, opmask_state); 132 XO(XSTATE_ZMM_Hi256_BIT, zmm_hi256_state); 133 XO(XSTATE_Hi16_ZMM_BIT, hi16_zmm_state); 134 XO(XSTATE_PKRU_BIT, pkru_state); 135 136 #undef XO 137 } 138 139 /* 140 * TCG-specific defaults that override cpudef models when using TCG. 141 * Only for builtin_x86_defs models initialized with x86_register_cpudef_types. 142 */ 143 static PropValue tcg_default_props[] = { 144 { "vme", "off" }, 145 { NULL, NULL }, 146 }; 147 148 static void tcg_cpu_instance_init(CPUState *cs) 149 { 150 X86CPU *cpu = X86_CPU(cs); 151 X86CPUClass *xcc = X86_CPU_GET_CLASS(cpu); 152 153 if (xcc->model) { 154 /* Special cases not set in the X86CPUDefinition structs: */ 155 x86_cpu_apply_props(cpu, tcg_default_props); 156 } 157 158 tcg_cpu_xsave_init(); 159 } 160 161 static void tcg_cpu_accel_class_init(ObjectClass *oc, void *data) 162 { 163 AccelCPUClass *acc = ACCEL_CPU_CLASS(oc); 164 165 #ifndef CONFIG_USER_ONLY 166 acc->cpu_realizefn = tcg_cpu_realizefn; 167 #endif /* CONFIG_USER_ONLY */ 168 169 acc->cpu_class_init = tcg_cpu_class_init; 170 acc->cpu_instance_init = tcg_cpu_instance_init; 171 } 172 static const TypeInfo tcg_cpu_accel_type_info = { 173 .name = ACCEL_CPU_NAME("tcg"), 174 175 .parent = TYPE_ACCEL_CPU, 176 .class_init = tcg_cpu_accel_class_init, 177 .abstract = true, 178 }; 179 static void tcg_cpu_accel_register_types(void) 180 { 181 type_register_static(&tcg_cpu_accel_type_info); 182 } 183 type_init(tcg_cpu_accel_register_types); 184