From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33695) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dFL92-00088Z-C3 for qemu-devel@nongnu.org; Mon, 29 May 2017 09:55:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dFL8y-0005CV-GH for qemu-devel@nongnu.org; Mon, 29 May 2017 09:55:40 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:33849) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dFL8y-0005CG-6S for qemu-devel@nongnu.org; Mon, 29 May 2017 09:55:36 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4TDrX0Q078409 for ; Mon, 29 May 2017 09:55:35 -0400 Received: from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 2aqg1pf3kw-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 29 May 2017 09:55:34 -0400 Received: from localhost by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 29 May 2017 14:55:32 +0100 From: Halil Pasic Date: Mon, 29 May 2017 15:55:16 +0200 In-Reply-To: <20170529135520.101429-1-pasic@linux.vnet.ibm.com> References: <20170529135520.101429-1-pasic@linux.vnet.ibm.com> Message-Id: <20170529135520.101429-4-pasic@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 3/7] s390x: add css_migration_enabled to machine class List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Cornelia Huck , "Dr. David Alan Gilbert" Cc: Dong Jia Shi , Juan Quintela , qemu-devel@nongnu.org, Halil Pasic Currently the migration of the channel subsystem (css) is only partial and is done by the virtio ccw proxies -- the only migratable css devices existing at the moment. With the current work on emulated and passthrough devices we need to decouple the migration of the channel subsystem state from virtio ccw, and have a separate section for it. A new section however necessarily breaks the migration compatibility. So let us introduce a switch at the machine class, and put it in 'off' state for now. We will turn the switch 'on' for future machines once all preparations are met. For compatibility machines the switch will stay 'off'. Signed-off-by: Halil Pasic --- hw/s390x/s390-virtio-ccw.c | 13 +++++++++++++ include/hw/s390x/s390-virtio-ccw.h | 7 +++++++ 2 files changed, 20 insertions(+) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 04148916ed..95256d3982 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -196,6 +196,7 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data) s390mc->ri_allowed = true; s390mc->cpu_model_allowed = true; + s390mc->css_migration_enabled = false; /* TODO: set to true */ mc->init = ccw_init; mc->reset = s390_machine_reset; mc->hot_add_cpu = s390_hot_add_cpu; @@ -344,6 +345,11 @@ static const TypeInfo ccw_machine_info = { }, }; +bool css_migration_enabled(void) +{ + return get_machine_class()->css_migration_enabled; +} + #define DEFINE_CCW_MACHINE(suffix, verstr, latest) \ static void ccw_machine_##suffix##_class_init(ObjectClass *oc, \ void *data) \ @@ -445,6 +451,10 @@ static const TypeInfo ccw_machine_info = { static void ccw_machine_2_10_instance_options(MachineState *machine) { + /* + * TODO Once preparations are done register vmstate for the css if + * css_migration_enabled(). + */ } static void ccw_machine_2_10_class_options(MachineClass *mc) @@ -459,8 +469,11 @@ static void ccw_machine_2_9_instance_options(MachineState *machine) static void ccw_machine_2_9_class_options(MachineClass *mc) { + S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc); + ccw_machine_2_10_class_options(mc); SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9); + s390mc->css_migration_enabled = false; } DEFINE_CCW_MACHINE(2_9, "2.9", false); diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h index 7b8a3e4d74..e9c4f4182b 100644 --- a/include/hw/s390x/s390-virtio-ccw.h +++ b/include/hw/s390x/s390-virtio-ccw.h @@ -38,6 +38,7 @@ typedef struct S390CcwMachineClass { /*< public >*/ bool ri_allowed; bool cpu_model_allowed; + bool css_migration_enabled; } S390CcwMachineClass; /* runtime-instrumentation allowed by the machine */ @@ -45,4 +46,10 @@ bool ri_allowed(void); /* cpu model allowed by the machine */ bool cpu_model_allowed(void); +/** + * Returns true if (vmstate based) migration of the channel subsystem + * is enabled, false if it is disabled. + */ +bool css_migration_enabled(void); + #endif -- 2.11.2