From nobody Fri Nov 7 14:38:43 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; spf=pass (zoho.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=intel.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1548334693682246.79127407187127; Thu, 24 Jan 2019 04:58:13 -0800 (PST) Received: from localhost ([127.0.0.1]:53128 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmeaC-0007Oo-L1 for importer@patchew.org; Thu, 24 Jan 2019 07:58:12 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47551) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmeYy-0006mv-5V for qemu-devel@nongnu.org; Thu, 24 Jan 2019 07:56:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gmeYx-0005hO-Ia for qemu-devel@nongnu.org; Thu, 24 Jan 2019 07:56:56 -0500 Received: from mga06.intel.com ([134.134.136.31]:20544) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gmeYx-0005be-AO for qemu-devel@nongnu.org; Thu, 24 Jan 2019 07:56:55 -0500 Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Jan 2019 04:56:46 -0800 Received: from unknown (HELO vmm.bj.intel.com) ([10.240.192.123]) by orsmga007.jf.intel.com with ESMTP; 24 Jan 2019 04:56:44 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,516,1539673200"; d="scan'208";a="109429029" From: Luwei Kang To: qemu-devel@nongnu.org Date: Thu, 24 Jan 2019 20:54:43 -0500 Message-Id: <1548381283-16688-1-git-send-email-luwei.kang@intel.com> X-Mailer: git-send-email 1.8.3.1 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.31 Subject: [Qemu-devel] [PATCH] i386: extended the cpuid level when Intel PT is enabled 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: pbonzini@redhat.com, Luwei Kang , ehabkost@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Intel Processor Trace required CPUID[0x14] but the cpuid level is 0xd when create a kvm guest with e.g. "-cpu qemu64,+intel-pt". Signed-off-by: Luwei Kang --- target/i386/cpu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 2f54125..da477b3 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5023,6 +5023,13 @@ static void x86_cpu_expand_features(X86CPU *cpu, Err= or **errp) x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX); x86_cpu_adjust_feat_level(cpu, FEAT_SVM); x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE); + + /* Intel Processor Trace requires CPUID[0x14] */ + if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) && + kvm_enabled()) { + x86_cpu_adjust_level(cpu, &cpu->env.cpuid_min_level, 0x14); + } + /* SVM requires CPUID[0x8000000A] */ if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) { x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A); --=20 1.8.3.1