From nobody Fri Nov 14 08:03:44 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1585866308; cv=none; d=zohomail.com; s=zohoarc; b=mWpnvmlbHNbz4bbQrJZk0U3V5RRSAzJhmCvylP7fQHij7ghkytsRPuqzxp5HbKBovOIghqiNc8g3PBG86n/m9kJf2h1asUwmcuXsck9ND9RxYTf4wf1KYPriRdM+jTUpyqMFg1tdyNn1valXR1kOcRZV7CPfIYT19i9IkZVMbXg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1585866308; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=yQ3U51HON3TXLJT8Q2aD4tlT/7B2ruyUCI5f++GmHKA=; b=UWpmWbYPh1S0lUNHNUUo5LRZth9aY1+wvSyCGN3y0U3rhDy4T2mjqcCWX83O/9SyUrwr8eR+KLSXRpxH7efd60DMEnzVNqMve2pVRE3qaF7hUnjRhenUct1YX3Oy8DsD6ydUKAgfkxrOPJmkcMVL8tSPOcvLna4Vf0VlWeY33X8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 158586630870789.93914273896132; Thu, 2 Apr 2020 15:25:08 -0700 (PDT) Received: from localhost ([::1]:47914 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jK8Gp-0000H6-F4 for importer@patchew.org; Thu, 02 Apr 2020 18:25:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34570) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jK8DW-0002LI-5e for qemu-devel@nongnu.org; Thu, 02 Apr 2020 18:21:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jK8DV-0007cc-1d for qemu-devel@nongnu.org; Thu, 02 Apr 2020 18:21:42 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:49454 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jK8DU-0007c9-UG for qemu-devel@nongnu.org; Thu, 02 Apr 2020 18:21:40 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-174-qK1Dk4QSM8KQHtm1aAO3iA-1; Thu, 02 Apr 2020 18:21:38 -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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6589C18A6EC0; Thu, 2 Apr 2020 22:21:37 +0000 (UTC) Received: from localhost (ovpn-116-71.gru2.redhat.com [10.97.116.71]) by smtp.corp.redhat.com (Postfix) with ESMTP id 86D5489F0A; Thu, 2 Apr 2020 22:21:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585866100; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yQ3U51HON3TXLJT8Q2aD4tlT/7B2ruyUCI5f++GmHKA=; b=LkQ7E8iEuRD5izGncSYwANeNeT75kk3jsbJ+zxdeBi5M+18pwJIfKfoTSC3fUKIgh45ZMN m0If0ckc1t8kRq94iykqPc1UgkgIce76Bo8sBQPWact/WbsUKlIttZAmJmhh7mc5/5P6/K Hkn8fSF7W2k9RNR77LEs50m3ftzzu0M= X-MC-Unique: qK1Dk4QSM8KQHtm1aAO3iA-1 From: Eduardo Habkost To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL 8/9] target/i386: set the CPUID level to 0x14 on old machine-type Date: Thu, 2 Apr 2020 19:20:50 -0300 Message-Id: <20200402222051.523093-9-ehabkost@redhat.com> In-Reply-To: <20200402222051.523093-1-ehabkost@redhat.com> References: <20200402222051.523093-1-ehabkost@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Luwei Kang , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Luwei Kang The CPUID level need to be set to 0x14 manually on old machine-type if Intel PT is enabled in guest. E.g. the CPUID[0].EAX(level)=3D7 and CPUID[7].EBX[25](intel-pt)=3D1 when the Qemu with "-machine pc-i440fx-3.1 -cpu qemu64,+intel-pt" parameter. Some Intel PT capabilities are exposed by leaf 0x14 and the missing capabilities will cause some MSRs access failed. This patch add a warning message to inform the user to extend the CPUID level. Suggested-by: Eduardo Habkost Signed-off-by: Luwei Kang Message-Id: <1584031686-16444-1-git-send-email-luwei.kang@intel.com> Signed-off-by: Eduardo Habkost --- target/i386/cpu.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 6ad24774c5..f3b25c7301 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6356,9 +6356,14 @@ static void x86_cpu_expand_features(X86CPU *cpu, Err= or **errp) x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE); =20 /* Intel Processor Trace requires CPUID[0x14] */ - if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) && - kvm_enabled() && cpu->intel_pt_auto_level) { - x86_cpu_adjust_level(cpu, &cpu->env.cpuid_min_level, 0x14); + if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT)) { + if (cpu->intel_pt_auto_level) { + x86_cpu_adjust_level(cpu, &cpu->env.cpuid_min_level, 0x14); + } else if (cpu->env.cpuid_min_level < 0x14) { + mark_unavailable_features(cpu, FEAT_7_0_EBX, + CPUID_7_0_EBX_INTEL_PT, + "Intel PT need CPUID leaf 0x14, please set by \"-cpu .= ..,+intel-pt,level=3D0x14\""); + } } =20 /* CPU topology with multi-dies support requires CPUID[0x1F] */ --=20 2.24.1