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authorChristian Borntraeger <borntraeger@de.ibm.com>2013-09-19 09:32:03 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2013-09-20 13:55:29 +0200
commitd8b30c830243c5b7180befd9e1921383c9626bf0 (patch)
tree278be76b7e807b7f590472e4fb54d8487aab9ef2 /target-s390x
parent5d9bf1c07c1369ab3506fc82cc65a10f4415d867 (diff)
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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>
Diffstat (limited to 'target-s390x')
-rw-r--r--target-s390x/misc_helper.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index 1690907..37ea60d 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -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;