target/s390x/interrupt.c

   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 "qemu/log.h"
  12 #include "cpu.h"
  13 #include "exec/exec-all.h"
  14 #include "sysemu/kvm.h"
  15 #include "hw/s390x/ioinst.h"
  16
  17 /* Ensure to exit the TB after this call! */
  18 void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen)
  19 {
  20     CPUState *cs = CPU(s390_env_get_cpu(env));
  21
  22     cs->exception_index = EXCP_PGM;
  23     env->int_pgm_code = code;
  24     env->int_pgm_ilen = ilen;
  25 }
  26
  27 static void tcg_s390_program_interrupt(CPUS390XState *env, uint32_t code,
  28                                        int ilen)
  29 {
  30 #ifdef CONFIG_TCG
  31     trigger_pgm_exception(env, code, ilen);
  32     cpu_loop_exit(CPU(s390_env_get_cpu(env)));
  33 #else
  34     g_assert_not_reached();
  35 #endif
  36 }
  37
  38 void program_interrupt(CPUS390XState *env, uint32_t code, int ilen)
  39 {
  40     S390CPU *cpu = s390_env_get_cpu(env);
  41
  42     qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
  43                   env->psw.addr);
  44
  45     if (kvm_enabled()) {
  46         kvm_s390_program_interrupt(cpu, code);
  47     } else if (tcg_enabled()) {
  48         tcg_s390_program_interrupt(env, code, ilen);
  49     } else {
  50         g_assert_not_reached();
  51     }
  52 }
  53
  54 #if !defined(CONFIG_USER_ONLY)
  55 void cpu_inject_ext(S390CPU *cpu, uint32_t code, uint32_t param,
  56                     uint64_t param64)
  57 {
  58     CPUS390XState *env = &cpu->env;
  59
  60     if (env->ext_index == MAX_EXT_QUEUE - 1) {
  61         /* ugh - can't queue anymore. Let's drop. */
  62         return;
  63     }
  64
  65     env->ext_index++;
  66     assert(env->ext_index < MAX_EXT_QUEUE);
  67
  68     env->ext_queue[env->ext_index].code = code;
  69     env->ext_queue[env->ext_index].param = param;
  70     env->ext_queue[env->ext_index].param64 = param64;
  71
  72     env->pending_int |= INTERRUPT_EXT;
  73     cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
  74 }
  75
  76 static void cpu_inject_io(S390CPU *cpu, uint16_t subchannel_id,
  77                           uint16_t subchannel_number,
  78                           uint32_t io_int_parm, uint32_t io_int_word)
  79 {
  80     CPUS390XState *env = &cpu->env;
  81     int isc = IO_INT_WORD_ISC(io_int_word);
  82
  83     if (env->io_index[isc] == MAX_IO_QUEUE - 1) {
  84         /* ugh - can't queue anymore. Let's drop. */
  85         return;
  86     }
  87
  88     env->io_index[isc]++;
  89     assert(env->io_index[isc] < MAX_IO_QUEUE);
  90
  91     env->io_queue[env->io_index[isc]][isc].id = subchannel_id;
  92     env->io_queue[env->io_index[isc]][isc].nr = subchannel_number;
  93     env->io_queue[env->io_index[isc]][isc].parm = io_int_parm;
  94     env->io_queue[env->io_index[isc]][isc].word = io_int_word;
  95
  96     env->pending_int |= INTERRUPT_IO;
  97     cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
  98 }
  99
 100 static void cpu_inject_crw_mchk(S390CPU *cpu)
 101 {
 102     CPUS390XState *env = &cpu->env;
 103
 104     if (env->mchk_index == MAX_MCHK_QUEUE - 1) {
 105         /* ugh - can't queue anymore. Let's drop. */
 106         return;
 107     }
 108
 109     env->mchk_index++;
 110     assert(env->mchk_index < MAX_MCHK_QUEUE);
 111
 112     env->mchk_queue[env->mchk_index].type = 1;
 113
 114     env->pending_int |= INTERRUPT_MCHK;
 115     cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
 116 }
 117
 118 /*
 119  * All of the following interrupts are floating, i.e. not per-vcpu.
 120  * We just need a dummy cpustate in order to be able to inject in the
 121  * non-kvm case.
 122  */
 123 void s390_sclp_extint(uint32_t parm)
 124 {
 125     if (kvm_enabled()) {
 126         kvm_s390_service_interrupt(parm);
 127     } else {
 128         S390CPU *dummy_cpu = s390_cpu_addr2state(0);
 129
 130         cpu_inject_ext(dummy_cpu, EXT_SERVICE, parm, 0);
 131     }
 132 }
 133
 134 void s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr,
 135                        uint32_t io_int_parm, uint32_t io_int_word)
 136 {
 137     if (kvm_enabled()) {
 138         kvm_s390_io_interrupt(subchannel_id, subchannel_nr, io_int_parm,
 139                               io_int_word);
 140     } else {
 141         S390CPU *dummy_cpu = s390_cpu_addr2state(0);
 142
 143         cpu_inject_io(dummy_cpu, subchannel_id, subchannel_nr, io_int_parm,
 144                       io_int_word);
 145     }
 146 }
 147
 148 void s390_crw_mchk(void)
 149 {
 150     if (kvm_enabled()) {
 151         kvm_s390_crw_mchk();
 152     } else {
 153         S390CPU *dummy_cpu = s390_cpu_addr2state(0);
 154
 155         cpu_inject_crw_mchk(dummy_cpu);
 156     }
 157 }
 158
 159 #endif