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 <borntrae...@de.ibm.com>
---
target-s390x/kvm.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index ec1d1a5..532326f 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -33,6 +33,7 @@
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
#include "cpu.h"
+#include "sysemu/cpus.h"
#include "sysemu/device_tree.h"
#include "qapi/qmp/qjson.h"
#include "monitor/monitor.h"
@@ -581,6 +582,32 @@ static int handle_hypercall(S390CPU *cpu, struct kvm_run
*run)
return 0;
}
+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;
+}
+
static int handle_diag308(S390CPU *cpu, struct kvm_run *run)
{
uint64_t r1, r3, addr, subcode;
@@ -603,6 +630,8 @@ static int handle_diag308(S390CPU *cpu, struct kvm_run *run)
}
switch (subcode) {
+ case 1:
+ return load_normal_reset(cpu);
case 5:
if ((r1 & 1) || (addr & 0x0fffULL)) {
enter_pgmcheck(cpu, PGM_SPECIFICATION);
--
1.8.3.1
