290 lines
6.9 KiB
C
290 lines
6.9 KiB
C
/*
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* QEMU S/390 Interrupt support
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*
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* Copyright IBM Corp. 2012, 2014
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at your
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* option) any later version. See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "cpu.h"
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#include "kvm_s390x.h"
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#include "internal.h"
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#include "exec/exec-all.h"
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#include "sysemu/kvm.h"
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#include "hw/s390x/ioinst.h"
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/* Ensure to exit the TB after this call! */
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void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen)
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{
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CPUState *cs = CPU(s390_env_get_cpu(env));
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cs->exception_index = EXCP_PGM;
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env->int_pgm_code = code;
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env->int_pgm_ilen = ilen;
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}
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static void tcg_s390_program_interrupt(CPUS390XState *env, uint32_t code,
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int ilen)
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{
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#ifdef CONFIG_TCG
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trigger_pgm_exception(env, code, ilen);
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cpu_loop_exit(CPU(s390_env_get_cpu(env)));
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#else
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g_assert_not_reached();
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#endif
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}
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void program_interrupt(CPUS390XState *env, uint32_t code, int ilen)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
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env->psw.addr);
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if (kvm_enabled()) {
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kvm_s390_program_interrupt(cpu, code);
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} else if (tcg_enabled()) {
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tcg_s390_program_interrupt(env, code, ilen);
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} else {
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g_assert_not_reached();
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}
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}
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#if !defined(CONFIG_USER_ONLY)
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static void cpu_inject_service(S390CPU *cpu, uint32_t param)
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{
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CPUS390XState *env = &cpu->env;
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/* multiplexing is good enough for sclp - kvm does it internally as well*/
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env->service_param |= param;
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env->pending_int |= INTERRUPT_EXT_SERVICE;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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void cpu_inject_clock_comparator(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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env->pending_int |= INTERRUPT_EXT_CLOCK_COMPARATOR;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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void cpu_inject_cpu_timer(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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env->pending_int |= INTERRUPT_EXT_CPU_TIMER;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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void cpu_inject_emergency_signal(S390CPU *cpu, uint16_t src_cpu_addr)
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{
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CPUS390XState *env = &cpu->env;
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g_assert(src_cpu_addr < S390_MAX_CPUS);
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set_bit(src_cpu_addr, env->emergency_signals);
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env->pending_int |= INTERRUPT_EMERGENCY_SIGNAL;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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int cpu_inject_external_call(S390CPU *cpu, uint16_t src_cpu_addr)
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{
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CPUS390XState *env = &cpu->env;
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g_assert(src_cpu_addr < S390_MAX_CPUS);
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if (env->pending_int & INTERRUPT_EXTERNAL_CALL) {
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return -EBUSY;
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}
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env->external_call_addr = src_cpu_addr;
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env->pending_int |= INTERRUPT_EXTERNAL_CALL;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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return 0;
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}
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void cpu_inject_restart(S390CPU *cpu)
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{
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if (kvm_enabled()) {
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kvm_s390_restart_interrupt(cpu);
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return;
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}
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/* FIXME TCG */
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g_assert_not_reached();
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}
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void cpu_inject_stop(S390CPU *cpu)
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{
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if (kvm_enabled()) {
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kvm_s390_stop_interrupt(cpu);
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return;
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}
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/* FIXME TCG */
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g_assert_not_reached();
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}
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static void cpu_inject_io(S390CPU *cpu, uint16_t subchannel_id,
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uint16_t subchannel_number,
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uint32_t io_int_parm, uint32_t io_int_word)
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{
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CPUS390XState *env = &cpu->env;
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int isc = IO_INT_WORD_ISC(io_int_word);
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if (env->io_index[isc] == MAX_IO_QUEUE - 1) {
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/* ugh - can't queue anymore. Let's drop. */
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return;
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}
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env->io_index[isc]++;
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assert(env->io_index[isc] < MAX_IO_QUEUE);
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env->io_queue[env->io_index[isc]][isc].id = subchannel_id;
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env->io_queue[env->io_index[isc]][isc].nr = subchannel_number;
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env->io_queue[env->io_index[isc]][isc].parm = io_int_parm;
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env->io_queue[env->io_index[isc]][isc].word = io_int_word;
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env->pending_int |= INTERRUPT_IO;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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static void cpu_inject_crw_mchk(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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if (env->mchk_index == MAX_MCHK_QUEUE - 1) {
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/* ugh - can't queue anymore. Let's drop. */
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return;
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}
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env->mchk_index++;
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assert(env->mchk_index < MAX_MCHK_QUEUE);
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env->mchk_queue[env->mchk_index].type = 1;
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env->pending_int |= INTERRUPT_MCHK;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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/*
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* All of the following interrupts are floating, i.e. not per-vcpu.
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* We just need a dummy cpustate in order to be able to inject in the
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* non-kvm case.
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*/
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void s390_sclp_extint(uint32_t parm)
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{
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if (kvm_enabled()) {
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kvm_s390_service_interrupt(parm);
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} else {
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S390CPU *dummy_cpu = s390_cpu_addr2state(0);
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cpu_inject_service(dummy_cpu, parm);
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}
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}
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void s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr,
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uint32_t io_int_parm, uint32_t io_int_word)
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{
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if (kvm_enabled()) {
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kvm_s390_io_interrupt(subchannel_id, subchannel_nr, io_int_parm,
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io_int_word);
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} else {
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S390CPU *dummy_cpu = s390_cpu_addr2state(0);
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cpu_inject_io(dummy_cpu, subchannel_id, subchannel_nr, io_int_parm,
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io_int_word);
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}
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}
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void s390_crw_mchk(void)
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{
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if (kvm_enabled()) {
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kvm_s390_crw_mchk();
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} else {
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S390CPU *dummy_cpu = s390_cpu_addr2state(0);
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cpu_inject_crw_mchk(dummy_cpu);
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}
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}
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bool s390_cpu_has_mcck_int(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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if (!(env->psw.mask & PSW_MASK_MCHECK)) {
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return false;
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}
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return env->pending_int & INTERRUPT_MCHK;
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}
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bool s390_cpu_has_ext_int(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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if (!(env->psw.mask & PSW_MASK_EXT)) {
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return false;
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}
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if ((env->pending_int & INTERRUPT_EMERGENCY_SIGNAL) &&
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(env->cregs[0] & CR0_EMERGENCY_SIGNAL_SC)) {
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return true;
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}
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if ((env->pending_int & INTERRUPT_EXTERNAL_CALL) &&
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(env->cregs[0] & CR0_EXTERNAL_CALL_SC)) {
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return true;
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}
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if ((env->pending_int & INTERRUPT_EXTERNAL_CALL) &&
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(env->cregs[0] & CR0_EXTERNAL_CALL_SC)) {
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return true;
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}
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if ((env->pending_int & INTERRUPT_EXT_CLOCK_COMPARATOR) &&
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(env->cregs[0] & CR0_CKC_SC)) {
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return true;
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}
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if ((env->pending_int & INTERRUPT_EXT_CPU_TIMER) &&
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(env->cregs[0] & CR0_CPU_TIMER_SC)) {
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return true;
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}
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if ((env->pending_int & INTERRUPT_EXT_SERVICE) &&
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(env->cregs[0] & CR0_SERVICE_SC)) {
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return true;
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}
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return false;
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}
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bool s390_cpu_has_io_int(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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if (!(env->psw.mask & PSW_MASK_IO)) {
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return false;
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}
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return env->pending_int & INTERRUPT_IO;
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}
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#endif
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bool s390_cpu_has_int(S390CPU *cpu)
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{
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#ifndef CONFIG_USER_ONLY
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if (!tcg_enabled()) {
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return false;
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}
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return s390_cpu_has_mcck_int(cpu) ||
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s390_cpu_has_ext_int(cpu) ||
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s390_cpu_has_io_int(cpu);
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#else
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return false;
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#endif
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}
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