diff options
Diffstat (limited to 'hw/s390-virtio.c')
| -rw-r--r-- | hw/s390-virtio.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c index ee850f0559..37945d5d83 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)); |