From patchwork Mon Aug 29 11:45:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 9303733 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1F2756077C for ; Mon, 29 Aug 2016 12:05:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C9C228734 for ; Mon, 29 Aug 2016 12:05:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ECA3328741; Mon, 29 Aug 2016 12:05:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D9B9628734 for ; Mon, 29 Aug 2016 12:05:03 +0000 (UTC) Received: from localhost ([::1]:42946 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beLJG-0006vn-Qe for patchwork-qemu-devel@patchwork.kernel.org; Mon, 29 Aug 2016 08:05:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45437) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beL0h-0006BT-6d for qemu-devel@nongnu.org; Mon, 29 Aug 2016 07:46:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1beL0X-0001OW-VE for qemu-devel@nongnu.org; Mon, 29 Aug 2016 07:45:51 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49722 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beL0X-0001O1-PA for qemu-devel@nongnu.org; Mon, 29 Aug 2016 07:45:41 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u7TBhoD5084443 for ; Mon, 29 Aug 2016 07:45:41 -0400 Received: from e06smtp08.uk.ibm.com (e06smtp08.uk.ibm.com [195.75.94.104]) by mx0a-001b2d01.pphosted.com with ESMTP id 253rc2hwew-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 29 Aug 2016 07:45:41 -0400 Received: from localhost by e06smtp08.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 29 Aug 2016 12:45:38 +0100 X-IBM-Helo: d06dlp02.portsmouth.uk.ibm.com X-IBM-MailFrom: cornelia.huck@de.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 2C139219005F for ; Mon, 29 Aug 2016 12:45:01 +0100 (BST) Received: from d06av05.portsmouth.uk.ibm.com (d06av05.portsmouth.uk.ibm.com [9.149.37.229]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u7TBjclc61866104 for ; Mon, 29 Aug 2016 11:45:38 GMT Received: from d06av05.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u7TBjb7A009629 for ; Mon, 29 Aug 2016 05:45:37 -0600 Received: from gondolin.boeblingen.de.ibm.com (dyn-9-152-224-137.boeblingen.de.ibm.com [9.152.224.137]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u7TBjW4c009268 (version=TLSv1/SSLv3 cipher=AES256-SHA256 bits=256 verify=NO); Mon, 29 Aug 2016 05:45:37 -0600 From: Cornelia Huck To: qemu-devel@nongnu.org Date: Mon, 29 Aug 2016 13:45:12 +0200 X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160829114530.10842-1-cornelia.huck@de.ibm.com> References: <20160829114530.10842-1-cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16082911-0032-0000-0000-00000202F095 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16082911-0033-0000-0000-00001C8F9A25 Message-Id: <20160829114530.10842-21-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-08-29_05:, , 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-1608290119 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH for-2.8 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: Cornelia Huck , borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, agraf@suse.de, David Hildenbrand Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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: <1472062266-53206-12-git-send-email-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 75c3099..946b565 100644 --- a/target-s390x/cpu_models.c +++ b/target-s390x/cpu_models.c @@ -73,6 +73,31 @@ static const 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 244256b..fe988cc 100644 --- a/target-s390x/cpu_models.h +++ b/target-s390x/cpu_models.h @@ -43,4 +43,6 @@ 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 = {