From nobody Sun Feb 8 18:30:15 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1496259384604612.2245404247788; Wed, 31 May 2017 12:36:24 -0700 (PDT) Received: from localhost ([::1]:33541 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dG9Pq-0003Hg-Oy for importer@patchew.org; Wed, 31 May 2017 15:36:22 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37338) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dG9OJ-0002NF-IH for qemu-devel@nongnu.org; Wed, 31 May 2017 15:34:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dG9OG-0003OJ-Io for qemu-devel@nongnu.org; Wed, 31 May 2017 15:34:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55260) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dG9OG-0003NG-BJ for qemu-devel@nongnu.org; Wed, 31 May 2017 15:34:44 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 427A71A34EB; Wed, 31 May 2017 19:34:43 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-107.ams2.redhat.com [10.36.116.107]) by smtp.corp.redhat.com (Postfix) with ESMTP id EAE211898E; Wed, 31 May 2017 19:34:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 427A71A34EB Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=david@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 427A71A34EB From: David Hildenbrand To: qemu-devel@nongnu.org Date: Wed, 31 May 2017 21:34:33 +0200 Message-Id: <20170531193434.6918-2-david@redhat.com> In-Reply-To: <20170531193434.6918-1-david@redhat.com> References: <20170531193434.6918-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Wed, 31 May 2017 19:34:43 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v1 1/2] s390x/cpumodel: take care of the cpuid format bit for KVM 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: thuth@redhat.com, david@redhat.com, Christian Borntraeger , "Jason J . Herne" , Cornelia Huck , Aurelien Jarno , rth@twiddle.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Let's also properly forward that bit. It should always be set. I verified it under z/VM, it seems to be always set there. For now, zKVM guests never get that bit set when the CPU model is active. The PoP mentiones, that z800 + z900 (HW generation 7) always set this bit to 0, so let's take care of that. Signed-off-by: David Hildenbrand --- target/s390x/cpu_models.c | 1 + target/s390x/cpu_models.h | 10 +++++++--- target/s390x/kvm.c | 1 + 3 files changed, 9 insertions(+), 3 deletions(-) diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index 8d27363..9e23535 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -740,6 +740,7 @@ void s390_realize_cpu_model(CPUState *cs, Error **errp) /* copy over properties that can vary */ cpu->model->lowest_ibc =3D max_model->lowest_ibc; cpu->model->cpu_id =3D max_model->cpu_id; + cpu->model->cpu_id_format =3D max_model->cpu_id_format; cpu->model->cpu_ver =3D max_model->cpu_ver; =20 check_consistency(cpu->model); diff --git a/target/s390x/cpu_models.h b/target/s390x/cpu_models.h index 136a602..d41f8d6 100644 --- a/target/s390x/cpu_models.h +++ b/target/s390x/cpu_models.h @@ -46,6 +46,7 @@ typedef struct S390CPUModel { /* values copied from the "host" model, can change during migration */ uint16_t lowest_ibc; /* lowest IBC that the hardware supports */ uint32_t cpu_id; /* CPU id */ + uint8_t cpu_id_format; /* CPU id format bit */ uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */ } S390CPUModel; =20 @@ -54,12 +55,14 @@ typedef struct S390CPUModel { * * bits 0-7: Zeroes (ff for kvm) * bits 8-31: CPU ID (serial number) - * bits 32-48: Machine type - * bits 48-63: Zeroes + * bits 32-47: Machine type + * bit 48: CPU ID format + * bits 49-63: Zeroes */ #define cpuid_type(x) (((x) >> 16) & 0xffff) #define cpuid_id(x) (((x) >> 32) & 0xffffff) #define cpuid_ver(x) (((x) >> 56) & 0xff) +#define cpuid_format(x) (((x) >> 15) & 0x1) =20 #define lowest_ibc(x) (((uint32_t)(x) >> 16) & 0xfff) #define unblocked_ibc(x) ((uint32_t)(x) & 0xfff) @@ -92,7 +95,8 @@ static inline uint64_t s390_cpuid_from_cpu_model(const S3= 90CPUModel *model) { return ((uint64_t)model->cpu_ver << 56) | ((uint64_t)model->cpu_id << 32) | - ((uint64_t)model->def->type << 16); + ((uint64_t)model->def->type << 16) | + (model->def->gen =3D=3D 7 ? 0 : (uint64_t)model->cpu_id_format = << 15); } S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec= _ga, S390FeatBitmap features); diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index ba1e60f..a3d0019 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -2580,6 +2580,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model,= Error **errp) unblocked_ibc =3D unblocked_ibc(prop.ibc); } model->cpu_id =3D cpuid_id(prop.cpuid); + model->cpu_id_format =3D cpuid_format(prop.cpuid); model->cpu_ver =3D 0xff; =20 /* get supported cpu features indicated via STFL(E) */ --=20 2.9.3