diff options
| -rw-r--r-- | hw/s390-virtio.c | 32 | ||||
| -rw-r--r-- | target-s390x/cpu.h | 2 | ||||
| -rw-r--r-- | target-s390x/kvm.c | 19 |
3 files changed, 39 insertions, 14 deletions
diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c index ee850f0..37945d5 100644 --- a/hw/s390-virtio.c +++ b/hw/s390-virtio.c @@ -121,6 +121,34 @@ int s390_virtio_hypercall(CPUState *env, uint64_t mem, uint64_t hypercall) return r; } +/* + * The number of running CPUs. On s390 a shutdown is the state of all CPUs + * being either stopped or disabled (for interrupts) waiting. We have to + * track this number to call the shutdown sequence accordingly. This + * number is modified either on startup or while holding the big qemu lock. + */ +static unsigned s390_running_cpus; + +void s390_add_running_cpu(CPUState *env) +{ + if (env->halted) { + s390_running_cpus++; + env->halted = 0; + env->exception_index = -1; + } +} + +unsigned s390_del_running_cpu(CPUState *env) +{ + if (env->halted == 0) { + assert(s390_running_cpus >= 1); + s390_running_cpus--; + env->halted = 1; + env->exception_index = EXCP_HLT; + } + return s390_running_cpus; +} + /* PC hardware initialisation */ static void s390_init(ram_addr_t my_ram_size, const char *boot_device, @@ -179,8 +207,8 @@ static void s390_init(ram_addr_t my_ram_size, tmp_env->storage_keys = storage_keys; } - env->halted = 0; - env->exception_index = 0; + /* One CPU has to run */ + s390_add_running_cpu(env); if (kernel_filename) { kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0)); diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h index 95abe59..a66aa01 100644 --- a/target-s390x/cpu.h +++ b/target-s390x/cpu.h @@ -309,6 +309,8 @@ static inline void kvm_s390_interrupt_internal(CPUState *env, int type, } #endif CPUState *s390_cpu_addr2state(uint16_t cpu_addr); +void s390_add_running_cpu(CPUState *env); +unsigned s390_del_running_cpu(CPUState *env); /* from s390-virtio-bus */ extern const target_phys_addr_t virtio_size; diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c index 4beb794..40b0ab1 100644 --- a/target-s390x/kvm.c +++ b/target-s390x/kvm.c @@ -185,8 +185,7 @@ void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm, return; } - env->halted = 0; - env->exception_index = -1; + s390_add_running_cpu(env); qemu_cpu_kick(env); kvmint.type = type; @@ -299,8 +298,7 @@ static int handle_diag(CPUState *env, struct kvm_run *run, int ipb_code) static int s390_cpu_restart(CPUState *env) { kvm_s390_interrupt(env, KVM_S390_RESTART, 0); - env->halted = 0; - env->exception_index = -1; + s390_add_running_cpu(env); qemu_cpu_kick(env); dprintf("DONE: SIGP cpu restart: %p\n", env); return 0; @@ -425,17 +423,16 @@ static int handle_intercept(CPUState *env) r = handle_instruction(env, run); break; case ICPT_WAITPSW: - /* XXX What to do on system shutdown? */ - env->halted = 1; - env->exception_index = EXCP_HLT; + case ICPT_CPU_STOP: + if (s390_del_running_cpu(env) == 0) { + qemu_system_shutdown_request(); + } + r = EXCP_HALTED; break; case ICPT_SOFT_INTERCEPT: fprintf(stderr, "KVM unimplemented icpt SOFT\n"); exit(1); break; - case ICPT_CPU_STOP: - qemu_system_shutdown_request(); - break; case ICPT_IO: fprintf(stderr, "KVM unimplemented icpt IO\n"); exit(1); @@ -468,8 +465,6 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) if (ret == 0) { ret = EXCP_INTERRUPT; - } else if (ret > 0) { - ret = 0; } return ret; } |