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[Qemu-devel] [Patch] s390/kexec: Implement diag308 subcode 0
From: |
Christian Borntraeger |
Subject: |
[Qemu-devel] [Patch] s390/kexec: Implement diag308 subcode 0 |
Date: |
Fri, 20 Sep 2013 13:59:30 +0200 |
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 <address@hidden>
---
target-s390x/misc_helper.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
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;
--
1.8.3.1
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