245 lines
5.8 KiB
C
245 lines
5.8 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 "cpu.h"
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#include "kvm/kvm_s390x.h"
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#include "s390x-internal.h"
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#include "exec/exec-all.h"
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#include "sysemu/kvm.h"
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#include "sysemu/tcg.h"
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#include "hw/s390x/ioinst.h"
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#include "tcg/tcg_s390x.h"
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#if !defined(CONFIG_USER_ONLY)
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#include "hw/s390x/s390_flic.h"
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#endif
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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)
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{
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CPUState *cs = env_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 is already set, or will be set during unwinding */
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}
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void s390_program_interrupt(CPUS390XState *env, uint32_t code, uintptr_t ra)
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{
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if (kvm_enabled()) {
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kvm_s390_program_interrupt(env_archcpu(env), code);
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} else if (tcg_enabled()) {
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tcg_s390_program_interrupt(env, code, ra);
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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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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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CPUS390XState *env = &cpu->env;
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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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env->pending_int |= INTERRUPT_RESTART;
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cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
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}
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void cpu_inject_stop(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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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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env->pending_int |= INTERRUPT_STOP;
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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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S390FLICState *fs = s390_get_flic();
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S390FLICStateClass *fsc = s390_get_flic_class(fs);
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fsc->inject_service(fs, parm);
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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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S390FLICState *fs = s390_get_flic();
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S390FLICStateClass *fsc = s390_get_flic_class(fs);
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fsc->inject_io(fs, subchannel_id, subchannel_nr, io_int_parm, io_int_word);
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}
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void s390_crw_mchk(void)
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{
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S390FLICState *fs = s390_get_flic();
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S390FLICStateClass *fsc = s390_get_flic_class(fs);
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fsc->inject_crw_mchk(fs);
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}
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bool s390_cpu_has_mcck_int(S390CPU *cpu)
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{
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QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
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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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/* for now we only support channel report machine checks (floating) */
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if (qemu_s390_flic_has_crw_mchk(flic) &&
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(env->cregs[14] & CR14_CHANNEL_REPORT_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_ext_int(S390CPU *cpu)
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{
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QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
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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 (qemu_s390_flic_has_service(flic) &&
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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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QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
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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 qemu_s390_flic_has_io(flic, env->cregs[6]);
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}
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bool s390_cpu_has_restart_int(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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return env->pending_int & INTERRUPT_RESTART;
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}
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bool s390_cpu_has_stop_int(S390CPU *cpu)
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{
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CPUS390XState *env = &cpu->env;
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return env->pending_int & INTERRUPT_STOP;
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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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s390_cpu_has_restart_int(cpu) ||
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s390_cpu_has_stop_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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