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s390: Implement load normal reset 

kdump on s390 uses a load normal reset to bring the system in a defined
state by doing a subsystem reset. The issuing CPUs will have an initial
CPU reset, all other CPUs will have a CPU reset as defined in POP (no
register content will change).

Implement this as architectured.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2013-07-25 16:57:45 +02:00
parent f5ae2a4fd8
commit f077847572
1 changed files with 30 additions and 0 deletions
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30
target-s390x/misc_helper.c
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@ -31,6 +31,7 @@
#if !defined(CONFIG_USER_ONLY)
#include "exec/softmmu_exec.h"
#include "sysemu/cpus.h"
#include "sysemu/sysemu.h"
#endif
@ -180,6 +181,32 @@ uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
}
#ifndef CONFIG_USER_ONLY
static void cpu_reset_all(void)
{
CPUState *cpu;
S390CPUClass *scc;
for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
scc = S390_CPU_GET_CLASS(CPU(cpu));
scc->cpu_reset(CPU(cpu));
}
}
static int load_normal_reset(S390CPU *cpu)
{
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
pause_all_vcpus();
cpu_synchronize_all_states();
cpu_reset_all();
io_subsystem_reset();
scc->initial_cpu_reset(CPU(cpu));
scc->load_normal(CPU(cpu));
cpu_synchronize_all_post_reset();
resume_all_vcpus();
return 0;
}
#define DIAG_308_RC_NO_CONF 0x0102
#define DIAG_308_RC_INVALID 0x0402
void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
@ -198,6 +225,9 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
}
switch (subcode) {
case 1:
load_normal_reset(s390_env_get_cpu(env));
break;
case 5:
if ((r1 & 1) || (addr & 0x0fffULL)) {
program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);