From patchwork Tue Sep 6 07:46:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 666351 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3sSzQx3mz9z9s4n for ; Tue, 6 Sep 2016 17:55:05 +1000 (AEST) Received: from localhost ([::1]:59686 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bhBDi-00084m-8b for incoming@patchwork.ozlabs.org; Tue, 06 Sep 2016 03:55:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38846) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bhB6L-0001Ip-V5 for qemu-devel@nongnu.org; Tue, 06 Sep 2016 03:47:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bhB6K-0002F9-Kz for qemu-devel@nongnu.org; Tue, 06 Sep 2016 03:47:25 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49126 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bhB6K-0002Eu-Gi for qemu-devel@nongnu.org; Tue, 06 Sep 2016 03:47:24 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u867gaBU118195 for ; Tue, 6 Sep 2016 03:47:24 -0400 Received: from e06smtp06.uk.ibm.com (e06smtp06.uk.ibm.com [195.75.94.102]) by mx0b-001b2d01.pphosted.com with ESMTP id 259ryra3xu-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 06 Sep 2016 03:47:23 -0400 Received: from localhost by e06smtp06.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 6 Sep 2016 08:47:20 +0100 X-IBM-Helo: d06dlp03.portsmouth.uk.ibm.com X-IBM-MailFrom: cornelia.huck@de.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by d06dlp03.portsmouth.uk.ibm.com (Postfix) with ESMTP id 2E64B1B08061 for ; Tue, 6 Sep 2016 08:49:05 +0100 (BST) Received: from d06av06.portsmouth.uk.ibm.com (d06av06.portsmouth.uk.ibm.com [9.149.37.217]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u867lJ5c25624626 for ; Tue, 6 Sep 2016 07:47:19 GMT Received: from d06av06.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av06.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u867lIC1013760 for ; Tue, 6 Sep 2016 03:47:19 -0400 Received: from gondolin.boeblingen.de.ibm.com (dyn-9-152-224-137.boeblingen.de.ibm.com [9.152.224.137]) by d06av06.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u867lCmh013216 (version=TLSv1/SSLv3 cipher=AES256-SHA256 bits=256 verify=NO); Tue, 6 Sep 2016 03:47:18 -0400 From: Cornelia Huck To: peter.maydell@linaro.org Date: Tue, 6 Sep 2016 09:46:52 +0200 X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160906074710.13495-1-cornelia.huck@de.ibm.com> References: <20160906074710.13495-1-cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16090607-0024-0000-0000-0000021219E1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16090607-0025-0000-0000-00002042706D Message-Id: <20160906074710.13495-21-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-09-06_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1609060120 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PULL 20/38] s390x/cpumodel: let the CPU model handle feature checks X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: borntraeger@de.ibm.com, agraf@suse.de, qemu-devel@nongnu.org, David Hildenbrand , jfrei@linux.vnet.ibm.com, Cornelia Huck Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: David Hildenbrand If we have certain features enabled, we have to migrate additional state (e.g. vector registers or runtime-instrumentation registers). Let the CPU model control that unless we have no "host" CPU model in the KVM case. This will later on be the case for compatibility machines, so migration from QEMU versions without the CPU model will still work. Acked-by: Cornelia Huck Signed-off-by: David Hildenbrand Message-Id: <20160905085244.99980-12-dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck --- target-s390x/cpu_models.c | 25 +++++++++++++++++++++++++ target-s390x/cpu_models.h | 2 ++ target-s390x/kvm.c | 4 ++-- target-s390x/machine.c | 14 ++------------ 4 files changed, 31 insertions(+), 14 deletions(-) diff --git a/target-s390x/cpu_models.c b/target-s390x/cpu_models.c index 1daa208..d44dab2 100644 --- a/target-s390x/cpu_models.c +++ b/target-s390x/cpu_models.c @@ -73,6 +73,31 @@ static S390CPUDef s390_cpu_defs[] = { CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"), }; +bool s390_has_feat(S390Feat feat) +{ + static S390CPU *cpu; + + if (!cpu) { + cpu = S390_CPU(qemu_get_cpu(0)); + } + + if (!cpu || !cpu->model) { +#ifdef CONFIG_KVM + if (kvm_enabled()) { + if (feat == S390_FEAT_VECTOR) { + return kvm_check_extension(kvm_state, + KVM_CAP_S390_VECTOR_REGISTERS); + } + if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) { + return kvm_s390_get_ri(); + } + } +#endif + return 0; + } + return test_bit(feat, cpu->model->features); +} + struct S390PrintCpuListInfo { FILE *f; fprintf_function print; diff --git a/target-s390x/cpu_models.h b/target-s390x/cpu_models.h index f3f3f3c..cca865d 100644 --- a/target-s390x/cpu_models.h +++ b/target-s390x/cpu_models.h @@ -49,4 +49,6 @@ typedef struct S390CPUModel { uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */ } S390CPUModel; +bool s390_has_feat(S390Feat feat); + #endif /* TARGET_S390X_CPU_MODELS_H */ diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c index 4341d54..4f32a6b 100644 --- a/target-s390x/kvm.c +++ b/target-s390x/kvm.c @@ -1539,7 +1539,7 @@ static void sigp_store_adtl_status(void *arg) { SigpInfo *si = arg; - if (!kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) { + if (!s390_has_feat(S390_FEAT_VECTOR)) { set_sigp_status(si, SIGP_STAT_INVALID_ORDER); return; } @@ -2119,7 +2119,7 @@ static uint64_t build_channel_report_mcic(void) MCIC_VB_WP | MCIC_VB_MS | MCIC_VB_PM | MCIC_VB_IA | MCIC_VB_FP | MCIC_VB_GR | MCIC_VB_CR | MCIC_VB_ST | MCIC_VB_AR | MCIC_VB_PR | MCIC_VB_FC | MCIC_VB_CT | MCIC_VB_CC; - if (kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) { + if (s390_has_feat(S390_FEAT_VECTOR)) { mcic |= MCIC_VB_VR; } return mcic; diff --git a/target-s390x/machine.c b/target-s390x/machine.c index aa39e5d..edc3a47 100644 --- a/target-s390x/machine.c +++ b/target-s390x/machine.c @@ -78,12 +78,7 @@ static const VMStateDescription vmstate_fpu = { static bool vregs_needed(void *opaque) { -#ifdef CONFIG_KVM - if (kvm_enabled()) { - return kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS); - } -#endif - return 0; + return s390_has_feat(S390_FEAT_VECTOR); } static const VMStateDescription vmstate_vregs = { @@ -147,12 +142,7 @@ static const VMStateDescription vmstate_vregs = { static bool riccb_needed(void *opaque) { -#ifdef CONFIG_KVM - if (kvm_enabled()) { - return kvm_s390_get_ri(); - } -#endif - return 0; + return s390_has_feat(S390_FEAT_RUNTIME_INSTRUMENTATION); } const VMStateDescription vmstate_riccb = {