| 1 | /* |
| 2 | * QEMU S/390 Interrupt support |
| 3 | * |
| 4 | * Copyright IBM Corp. 2012, 2014 |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your |
| 7 | * option) any later version. See the COPYING file in the top-level directory. |
| 8 | */ |
| 9 | |
| 10 | #include "qemu/osdep.h" |
| 11 | #include "cpu.h" |
| 12 | #include "kvm/kvm_s390x.h" |
| 13 | #include "s390x-internal.h" |
| 14 | #include "system/kvm.h" |
| 15 | #include "system/tcg.h" |
| 16 | #include "hw/s390x/ioinst.h" |
| 17 | #include "tcg/tcg_s390x.h" |
| 18 | #if !defined(CONFIG_USER_ONLY) |
| 19 | #include "hw/s390x/s390_flic.h" |
| 20 | #endif |
| 21 | |
| 22 | /* Ensure to exit the TB after this call! */ |
| 23 | void trigger_pgm_exception(CPUS390XState *env, uint32_t code) |
| 24 | { |
| 25 | CPUState *cs = env_cpu(env); |
| 26 | |
| 27 | cs->exception_index = EXCP_PGM; |
| 28 | env->int_pgm_code = code; |
| 29 | /* env->int_pgm_ilen is already set, or will be set during unwinding */ |
| 30 | } |
| 31 | |
| 32 | #if !defined(CONFIG_USER_ONLY) |
| 33 | void s390_program_interrupt(CPUS390XState *env, uint32_t code, uintptr_t ra) |
| 34 | { |
| 35 | if (kvm_enabled()) { |
| 36 | kvm_s390_program_interrupt(env_archcpu(env), code); |
| 37 | } else if (tcg_enabled()) { |
| 38 | tcg_s390_program_interrupt(env, code, ra); |
| 39 | } else { |
| 40 | g_assert_not_reached(); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | void cpu_inject_clock_comparator(S390CPU *cpu) |
| 45 | { |
| 46 | CPUS390XState *env = &cpu->env; |
| 47 | |
| 48 | env->pending_int |= INTERRUPT_EXT_CLOCK_COMPARATOR; |
| 49 | cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); |
| 50 | } |
| 51 | |
| 52 | void cpu_inject_cpu_timer(S390CPU *cpu) |
| 53 | { |
| 54 | CPUS390XState *env = &cpu->env; |
| 55 | |
| 56 | env->pending_int |= INTERRUPT_EXT_CPU_TIMER; |
| 57 | cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); |
| 58 | } |
| 59 | |
| 60 | void cpu_inject_emergency_signal(S390CPU *cpu, uint16_t src_cpu_addr) |
| 61 | { |
| 62 | CPUS390XState *env = &cpu->env; |
| 63 | |
| 64 | g_assert(src_cpu_addr < S390_MAX_CPUS); |
| 65 | set_bit(src_cpu_addr, env->emergency_signals); |
| 66 | |
| 67 | env->pending_int |= INTERRUPT_EMERGENCY_SIGNAL; |
| 68 | cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); |
| 69 | } |
| 70 | |
| 71 | int cpu_inject_external_call(S390CPU *cpu, uint16_t src_cpu_addr) |
| 72 | { |
| 73 | CPUS390XState *env = &cpu->env; |
| 74 | |
| 75 | g_assert(src_cpu_addr < S390_MAX_CPUS); |
| 76 | if (env->pending_int & INTERRUPT_EXTERNAL_CALL) { |
| 77 | return -EBUSY; |
| 78 | } |
| 79 | env->external_call_addr = src_cpu_addr; |
| 80 | |
| 81 | env->pending_int |= INTERRUPT_EXTERNAL_CALL; |
| 82 | cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | void cpu_inject_restart(S390CPU *cpu) |
| 87 | { |
| 88 | CPUS390XState *env = &cpu->env; |
| 89 | |
| 90 | if (kvm_enabled()) { |
| 91 | kvm_s390_restart_interrupt(cpu); |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | env->pending_int |= INTERRUPT_RESTART; |
| 96 | cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); |
| 97 | } |
| 98 | |
| 99 | void cpu_inject_stop(S390CPU *cpu) |
| 100 | { |
| 101 | CPUS390XState *env = &cpu->env; |
| 102 | |
| 103 | if (kvm_enabled()) { |
| 104 | kvm_s390_stop_interrupt(cpu); |
| 105 | return; |
| 106 | } |
| 107 | |
| 108 | env->pending_int |= INTERRUPT_STOP; |
| 109 | cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * All of the following interrupts are floating, i.e. not per-vcpu. |
| 114 | * We just need a dummy cpustate in order to be able to inject in the |
| 115 | * non-kvm case. |
| 116 | */ |
| 117 | void s390_sclp_extint(uint32_t parm) |
| 118 | { |
| 119 | S390FLICState *fs = s390_get_flic(); |
| 120 | S390FLICStateClass *fsc = s390_get_flic_class(fs); |
| 121 | |
| 122 | fsc->inject_service(fs, parm); |
| 123 | } |
| 124 | |
| 125 | void s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr, |
| 126 | uint32_t io_int_parm, uint32_t io_int_word) |
| 127 | { |
| 128 | S390FLICState *fs = s390_get_flic(); |
| 129 | S390FLICStateClass *fsc = s390_get_flic_class(fs); |
| 130 | |
| 131 | fsc->inject_io(fs, subchannel_id, subchannel_nr, io_int_parm, io_int_word); |
| 132 | } |
| 133 | |
| 134 | void s390_crw_mchk(void) |
| 135 | { |
| 136 | S390FLICState *fs = s390_get_flic(); |
| 137 | S390FLICStateClass *fsc = s390_get_flic_class(fs); |
| 138 | |
| 139 | fsc->inject_crw_mchk(fs); |
| 140 | } |
| 141 | |
| 142 | bool s390_cpu_has_mcck_int(S390CPU *cpu) |
| 143 | { |
| 144 | QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic()); |
| 145 | CPUS390XState *env = &cpu->env; |
| 146 | |
| 147 | if (!(env->psw.mask & PSW_MASK_MCHECK)) { |
| 148 | return false; |
| 149 | } |
| 150 | |
| 151 | /* for now we only support channel report machine checks (floating) */ |
| 152 | if (qemu_s390_flic_has_crw_mchk(flic) && |
| 153 | (env->cregs[14] & CR14_CHANNEL_REPORT_SC)) { |
| 154 | return true; |
| 155 | } |
| 156 | |
| 157 | return false; |
| 158 | } |
| 159 | |
| 160 | bool s390_cpu_has_ext_int(S390CPU *cpu) |
| 161 | { |
| 162 | QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic()); |
| 163 | CPUS390XState *env = &cpu->env; |
| 164 | |
| 165 | if (!(env->psw.mask & PSW_MASK_EXT)) { |
| 166 | return false; |
| 167 | } |
| 168 | |
| 169 | if ((env->pending_int & INTERRUPT_EMERGENCY_SIGNAL) && |
| 170 | (env->cregs[0] & CR0_EMERGENCY_SIGNAL_SC)) { |
| 171 | return true; |
| 172 | } |
| 173 | |
| 174 | if ((env->pending_int & INTERRUPT_EXTERNAL_CALL) && |
| 175 | (env->cregs[0] & CR0_EXTERNAL_CALL_SC)) { |
| 176 | return true; |
| 177 | } |
| 178 | |
| 179 | if ((env->pending_int & INTERRUPT_EXTERNAL_CALL) && |
| 180 | (env->cregs[0] & CR0_EXTERNAL_CALL_SC)) { |
| 181 | return true; |
| 182 | } |
| 183 | |
| 184 | if ((env->pending_int & INTERRUPT_EXT_CLOCK_COMPARATOR) && |
| 185 | (env->cregs[0] & CR0_CKC_SC)) { |
| 186 | return true; |
| 187 | } |
| 188 | |
| 189 | if ((env->pending_int & INTERRUPT_EXT_CPU_TIMER) && |
| 190 | (env->cregs[0] & CR0_CPU_TIMER_SC)) { |
| 191 | return true; |
| 192 | } |
| 193 | |
| 194 | if (qemu_s390_flic_has_service(flic) && |
| 195 | (env->cregs[0] & CR0_SERVICE_SC)) { |
| 196 | return true; |
| 197 | } |
| 198 | |
| 199 | return false; |
| 200 | } |
| 201 | |
| 202 | bool s390_cpu_has_io_int(S390CPU *cpu) |
| 203 | { |
| 204 | QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic()); |
| 205 | CPUS390XState *env = &cpu->env; |
| 206 | |
| 207 | if (!(env->psw.mask & PSW_MASK_IO)) { |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | return qemu_s390_flic_has_io(flic, env->cregs[6]); |
| 212 | } |
| 213 | |
| 214 | bool s390_cpu_has_restart_int(S390CPU *cpu) |
| 215 | { |
| 216 | CPUS390XState *env = &cpu->env; |
| 217 | |
| 218 | return env->pending_int & INTERRUPT_RESTART; |
| 219 | } |
| 220 | |
| 221 | bool s390_cpu_has_stop_int(S390CPU *cpu) |
| 222 | { |
| 223 | CPUS390XState *env = &cpu->env; |
| 224 | |
| 225 | return env->pending_int & INTERRUPT_STOP; |
| 226 | } |
| 227 | |
| 228 | bool s390_cpu_has_int(S390CPU *cpu) |
| 229 | { |
| 230 | if (!tcg_enabled()) { |
| 231 | return false; |
| 232 | } |
| 233 | return s390_cpu_has_mcck_int(cpu) || |
| 234 | s390_cpu_has_ext_int(cpu) || |
| 235 | s390_cpu_has_io_int(cpu) || |
| 236 | s390_cpu_has_restart_int(cpu) || |
| 237 | s390_cpu_has_stop_int(cpu); |
| 238 | } |
| 239 | #endif /* !CONFIG_USER_ONLY */ |