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xemu/target/s390x/interrupt.c
David Hildenbrand 8d2f850a5a s390x/tcg: introduce and use s390_program_interrupt() 
Allows to easily convert more callers of program_interrupt() and to
easily introduce new exceptions without forgetting about the cpu state
reset.

Use s390_program_interrupt() in places where we already had the same
pattern. We will later get rid of program_interrupt().

RA != 0 checks are already done behind the scenes.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171130162744.25442-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-12-14 17:56:54 +01:00

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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 "hw/s390x/ioinst.h"
/* Ensure to exit the TB after this call! */
void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
cs->exception_index = EXCP_PGM;
env->int_pgm_code = code;
env->int_pgm_ilen = ilen;
}
static void tcg_s390_program_interrupt(CPUS390XState *env, uint32_t code,
int ilen)
{
#ifdef CONFIG_TCG
trigger_pgm_exception(env, code, ilen);
cpu_loop_exit(CPU(s390_env_get_cpu(env)));
#else
g_assert_not_reached();
#endif
}
void program_interrupt(CPUS390XState *env, uint32_t code, int ilen)
{
S390CPU *cpu = s390_env_get_cpu(env);
qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
env->psw.addr);
if (kvm_enabled()) {
kvm_s390_program_interrupt(cpu, code);
} else if (tcg_enabled()) {
tcg_s390_program_interrupt(env, code, ilen);
} else {
g_assert_not_reached();
}
}
void s390_program_interrupt(CPUS390XState *env, uint32_t code, int ilen,
uintptr_t ra)
{
#ifdef CONFIG_TCG
S390CPU *cpu = s390_env_get_cpu(env);
if (tcg_enabled()) {
cpu_restore_state(CPU(cpu), ra);
}
#endif
program_interrupt(env, code, ilen);
}
#if !defined(CONFIG_USER_ONLY)
static void cpu_inject_service(S390CPU *cpu, uint32_t param)
{
CPUS390XState *env = &cpu->env;
/* multiplexing is good enough for sclp - kvm does it internally as well*/
env->service_param |= param;
env->pending_int |= INTERRUPT_EXT_SERVICE;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
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);
}
static void cpu_inject_io(S390CPU *cpu, uint16_t subchannel_id,
uint16_t subchannel_number,
uint32_t io_int_parm, uint32_t io_int_word)
{
CPUS390XState *env = &cpu->env;
int isc = IO_INT_WORD_ISC(io_int_word);
if (env->io_index[isc] == MAX_IO_QUEUE - 1) {
/* ugh - can't queue anymore. Let's drop. */
return;
}
env->io_index[isc]++;
assert(env->io_index[isc] < MAX_IO_QUEUE);
env->io_queue[env->io_index[isc]][isc].id = subchannel_id;
env->io_queue[env->io_index[isc]][isc].nr = subchannel_number;
env->io_queue[env->io_index[isc]][isc].parm = io_int_parm;
env->io_queue[env->io_index[isc]][isc].word = io_int_word;
env->pending_int |= INTERRUPT_IO;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
static void cpu_inject_crw_mchk(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
if (env->mchk_index == MAX_MCHK_QUEUE - 1) {
/* ugh - can't queue anymore. Let's drop. */
return;
}
env->mchk_index++;
assert(env->mchk_index < MAX_MCHK_QUEUE);
env->mchk_queue[env->mchk_index].type = 1;
env->pending_int |= INTERRUPT_MCHK;
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)
{
if (kvm_enabled()) {
kvm_s390_service_interrupt(parm);
} else {
S390CPU *dummy_cpu = s390_cpu_addr2state(0);
cpu_inject_service(dummy_cpu, parm);
}
}
void s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr,
uint32_t io_int_parm, uint32_t io_int_word)
{
if (kvm_enabled()) {
kvm_s390_io_interrupt(subchannel_id, subchannel_nr, io_int_parm,
io_int_word);
} else {
S390CPU *dummy_cpu = s390_cpu_addr2state(0);
cpu_inject_io(dummy_cpu, subchannel_id, subchannel_nr, io_int_parm,
io_int_word);
}
}
void s390_crw_mchk(void)
{
if (kvm_enabled()) {
kvm_s390_crw_mchk();
} else {
S390CPU *dummy_cpu = s390_cpu_addr2state(0);
cpu_inject_crw_mchk(dummy_cpu);
}
}
bool s390_cpu_has_mcck_int(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
if (!(env->psw.mask & PSW_MASK_MCHECK)) {
return false;
}
return env->pending_int & INTERRUPT_MCHK;
}
bool s390_cpu_has_ext_int(S390CPU *cpu)
{
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 ((env->pending_int & INTERRUPT_EXT_SERVICE) &&
(env->cregs[0] & CR0_SERVICE_SC)) {
return true;
}
return false;
}
bool s390_cpu_has_io_int(S390CPU *cpu)
{
CPUS390XState *env = &cpu->env;
if (!(env->psw.mask & PSW_MASK_IO)) {
return false;
}
return env->pending_int & INTERRUPT_IO;
}
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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