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/*
* QEMU S/390 Interrupt support
*
* Copyright IBM Corp. 2012, 2014
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at your
* option) any later version. See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "kvm_s390x.h"
#include "internal.h"
#include "exec/exec-all.h"
#include "sysemu/kvm.h"
#include "sysemu/tcg.h"
#include "hw/s390x/ioinst.h"
#include "tcg_s390x.h"
#if !defined(CONFIG_USER_ONLY)
#include "hw/s390x/s390_flic.h"
#endif
/* Ensure to exit the TB after this call! */
void trigger_pgm_exception(CPUS390XState *env, uint32_t code)
{
CPUState *cs = env_cpu(env);
cs->exception_index = EXCP_PGM;
env->int_pgm_code = code;
/* env->int_pgm_ilen is already set, or will be set during unwinding */
}
void s390_program_interrupt(CPUS390XState *env, uint32_t code, uintptr_t ra)
{
if (kvm_enabled()) {
kvm_s390_program_interrupt(env_archcpu(env), code);
} else if (tcg_enabled()) {
tcg_s390_program_interrupt(env, code, ra);
} else {
g_assert_not_reached();
}
}
#if !defined(CONFIG_USER_ONLY)
void cpu_inject_clock_comparator(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
env->pending_int |= INTERRUPT_EXT_CLOCK_COMPARATOR;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
void cpu_inject_cpu_timer(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
env->pending_int |= INTERRUPT_EXT_CPU_TIMER;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
void cpu_inject_emergency_signal(S390CPU *cpu, uint16_t src_cpu_addr)
{
CPUS390XState *env = &cpu->env;
g_assert(src_cpu_addr < S390_MAX_CPUS);
set_bit(src_cpu_addr, env->emergency_signals);
env->pending_int |= INTERRUPT_EMERGENCY_SIGNAL;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
int cpu_inject_external_call(S390CPU *cpu, uint16_t src_cpu_addr)
{
CPUS390XState *env = &cpu->env;
g_assert(src_cpu_addr < S390_MAX_CPUS);
if (env->pending_int & INTERRUPT_EXTERNAL_CALL) {
return -EBUSY;
}
env->external_call_addr = src_cpu_addr;
env->pending_int |= INTERRUPT_EXTERNAL_CALL;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
return 0;
}
void cpu_inject_restart(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
if (kvm_enabled()) {
kvm_s390_restart_interrupt(cpu);
return;
}
env->pending_int |= INTERRUPT_RESTART;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
void cpu_inject_stop(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
if (kvm_enabled()) {
kvm_s390_stop_interrupt(cpu);
return;
}
env->pending_int |= INTERRUPT_STOP;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
/*
* All of the following interrupts are floating, i.e. not per-vcpu.
* We just need a dummy cpustate in order to be able to inject in the
* non-kvm case.
*/
void s390_sclp_extint(uint32_t parm)
{
S390FLICState *fs = s390_get_flic();
S390FLICStateClass *fsc = s390_get_flic_class(fs);
fsc->inject_service(fs, parm);
}
void s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr,
uint32_t io_int_parm, uint32_t io_int_word)
{
S390FLICState *fs = s390_get_flic();
S390FLICStateClass *fsc = s390_get_flic_class(fs);
fsc->inject_io(fs, subchannel_id, subchannel_nr, io_int_parm, io_int_word);
}
void s390_crw_mchk(void)
{
S390FLICState *fs = s390_get_flic();
S390FLICStateClass *fsc = s390_get_flic_class(fs);
fsc->inject_crw_mchk(fs);
}
bool s390_cpu_has_mcck_int(S390CPU *cpu)
{
QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
CPUS390XState *env = &cpu->env;
if (!(env->psw.mask & PSW_MASK_MCHECK)) {
return false;
}
/* for now we only support channel report machine checks (floating) */
if (qemu_s390_flic_has_crw_mchk(flic) &&
(env->cregs[14] & CR14_CHANNEL_REPORT_SC)) {
return true;
}
return false;
}
bool s390_cpu_has_ext_int(S390CPU *cpu)
{
QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
CPUS390XState *env = &cpu->env;
if (!(env->psw.mask & PSW_MASK_EXT)) {
return false;
}
if ((env->pending_int & INTERRUPT_EMERGENCY_SIGNAL) &&
(env->cregs[0] & CR0_EMERGENCY_SIGNAL_SC)) {
return true;
}
if ((env->pending_int & INTERRUPT_EXTERNAL_CALL) &&
(env->cregs[0] & CR0_EXTERNAL_CALL_SC)) {
return true;
}
if ((env->pending_int & INTERRUPT_EXTERNAL_CALL) &&
(env->cregs[0] & CR0_EXTERNAL_CALL_SC)) {
return true;
}
if ((env->pending_int & INTERRUPT_EXT_CLOCK_COMPARATOR) &&
(env->cregs[0] & CR0_CKC_SC)) {
return true;
}
if ((env->pending_int & INTERRUPT_EXT_CPU_TIMER) &&
(env->cregs[0] & CR0_CPU_TIMER_SC)) {
return true;
}
if (qemu_s390_flic_has_service(flic) &&
(env->cregs[0] & CR0_SERVICE_SC)) {
return true;
}
return false;
}
bool s390_cpu_has_io_int(S390CPU *cpu)
{
QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
CPUS390XState *env = &cpu->env;
if (!(env->psw.mask & PSW_MASK_IO)) {
return false;
}
return qemu_s390_flic_has_io(flic, env->cregs[6]);
}
bool s390_cpu_has_restart_int(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
return env->pending_int & INTERRUPT_RESTART;
}
bool s390_cpu_has_stop_int(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
return env->pending_int & INTERRUPT_STOP;
}
#endif
bool s390_cpu_has_int(S390CPU *cpu)
{
#ifndef CONFIG_USER_ONLY
if (!tcg_enabled()) {
return false;
}
return s390_cpu_has_mcck_int(cpu) ||
s390_cpu_has_ext_int(cpu) ||
s390_cpu_has_io_int(cpu) ||
s390_cpu_has_restart_int(cpu) ||
s390_cpu_has_stop_int(cpu);
#else
return false;
#endif
}
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