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 X86CPU *cpu = X86_CPU(cs); 53 54 cpu->env.eip = tb->pc - tb->cs_base; 55 } 56 57 #ifndef CONFIG_USER_ONLY 58 static bool x86_debug_check_breakpoint(CPUState *cs) 59 { 60 X86CPU *cpu = X86_CPU(cs); 61 CPUX86State *env = &cpu->env; 62 63 /* RF disables all architectural breakpoints. */ 64 return !(env->eflags & RF_MASK); 65 } 66 #endif 67 68 #include "hw/core/tcg-cpu-ops.h" 69 70 static const struct TCGCPUOps x86_tcg_ops = { 71 .initialize = tcg_x86_init, 72 .synchronize_from_tb = x86_cpu_synchronize_from_tb, 73 .cpu_exec_enter = x86_cpu_exec_enter, 74 .cpu_exec_exit = x86_cpu_exec_exit, 75 .tlb_fill = x86_cpu_tlb_fill, 76 #ifdef CONFIG_USER_ONLY 77 .fake_user_interrupt = x86_cpu_do_interrupt, 78 #else 79 .do_interrupt = x86_cpu_do_interrupt, 80 .cpu_exec_interrupt = x86_cpu_exec_interrupt, 81 .debug_excp_handler = breakpoint_handler, 82 .debug_check_breakpoint = x86_debug_check_breakpoint, 83 #endif /* !CONFIG_USER_ONLY */ 84 }; 85 86 static void tcg_cpu_init_ops(AccelCPUClass *accel_cpu, CPUClass *cc) 87 { 88 /* for x86, all cpus use the same set of operations */ 89 cc->tcg_ops = &x86_tcg_ops; 90 } 91 92 static void tcg_cpu_class_init(CPUClass *cc) 93 { 94 cc->init_accel_cpu = tcg_cpu_init_ops; 95 } 96 97 static void tcg_cpu_xsave_init(void) 98 { 99 #define XO(bit, field) \ 100 x86_ext_save_areas[bit].offset = offsetof(X86XSaveArea, field); 101 102 XO(XSTATE_FP_BIT, legacy); 103 XO(XSTATE_SSE_BIT, legacy); 104 XO(XSTATE_YMM_BIT, avx_state); 105 XO(XSTATE_BNDREGS_BIT, bndreg_state); 106 XO(XSTATE_BNDCSR_BIT, bndcsr_state); 107 XO(XSTATE_OPMASK_BIT, opmask_state); 108 XO(XSTATE_ZMM_Hi256_BIT, zmm_hi256_state); 109 XO(XSTATE_Hi16_ZMM_BIT, hi16_zmm_state); 110 XO(XSTATE_PKRU_BIT, pkru_state); 111 112 #undef XO 113 } 114 115 /* 116 * TCG-specific defaults that override cpudef models when using TCG. 117 * Only for builtin_x86_defs models initialized with x86_register_cpudef_types. 118 */ 119 static PropValue tcg_default_props[] = { 120 { "vme", "off" }, 121 { NULL, NULL }, 122 }; 123 124 static void tcg_cpu_instance_init(CPUState *cs) 125 { 126 X86CPU *cpu = X86_CPU(cs); 127 X86CPUClass *xcc = X86_CPU_GET_CLASS(cpu); 128 129 if (xcc->model) { 130 /* Special cases not set in the X86CPUDefinition structs: */ 131 x86_cpu_apply_props(cpu, tcg_default_props); 132 } 133 134 tcg_cpu_xsave_init(); 135 } 136 137 static void tcg_cpu_accel_class_init(ObjectClass *oc, void *data) 138 { 139 AccelCPUClass *acc = ACCEL_CPU_CLASS(oc); 140 141 #ifndef CONFIG_USER_ONLY 142 acc->cpu_realizefn = tcg_cpu_realizefn; 143 #endif /* CONFIG_USER_ONLY */ 144 145 acc->cpu_class_init = tcg_cpu_class_init; 146 acc->cpu_instance_init = tcg_cpu_instance_init; 147 } 148 static const TypeInfo tcg_cpu_accel_type_info = { 149 .name = ACCEL_CPU_NAME("tcg"), 150 151 .parent = TYPE_ACCEL_CPU, 152 .class_init = tcg_cpu_accel_class_init, 153 .abstract = true, 154 }; 155 static void tcg_cpu_accel_register_types(void) 156 { 157 type_register_static(&tcg_cpu_accel_type_info); 158 } 159 type_init(tcg_cpu_accel_register_types); 160