From d8b30c830243c5b7180befd9e1921383c9626bf0 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Thu, 19 Sep 2013 09:32:03 +0200 Subject: 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 --- target-s390x/misc_helper.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'target-s390x') diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c index 1690907169..37ea60d20b 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; -- cgit v1.2.1