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s390/kexec: Implement diag308 subcode 0 

This patch implements subcode 0 of diag 308. This is necessary for kexec
(without kdump). The main difference to subcode 1 is that all CPUs get
a full reset, instead of the architectured CPU reset (which leaves all
registers untouched).

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2013-09-19 09:32:03 +02:00
parent 5d9bf1c07c
commit d8b30c8302
1 changed files with 26 additions and 0 deletions
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26
target-s390x/misc_helper.c
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@ -192,6 +192,29 @@ static void cpu_reset_all(void)
}
}
static void cpu_full_reset_all(void)
{
CPUState *cpu;
CPU_FOREACH(cpu) {
cpu_reset(cpu);
}
}
static int modified_clear_reset(S390CPU *cpu)
{
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
pause_all_vcpus();
cpu_synchronize_all_states();
cpu_full_reset_all();
io_subsystem_reset();
scc->load_normal(CPU(cpu));
cpu_synchronize_all_post_reset();
resume_all_vcpus();
return 0;
}
static int load_normal_reset(S390CPU *cpu)
{
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
@ -225,6 +248,9 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
}
switch (subcode) {
case 0:
modified_clear_reset(s390_env_get_cpu(env));
break;
case 1:
load_normal_reset(s390_env_get_cpu(env));
break;