From nobody Sun Feb 8 14:42:05 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) client-ip=66.175.222.108; envelope-from=bounce+27952+103512+1787277+3901457@groups.io; helo=mail02.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+103512+1787277+3901457@groups.io; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1682401685; cv=none; d=zohomail.com; s=zohoarc; b=g1C9yJMalR3guRPtT98ulpfrh+5JAMFDzt85F95wWjhk59Py8iS2uzhAMe8l5PVw9gQo0BqCgVS2HU37wBdVKPlygl+uKtCNVQxoQ/kMSX0nNzuc+HSPnc1Se5NsRG9DmXll99L4CeoEuLTGbMde3aEraFnSwdIvHHrl4WmYVTg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1682401685; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=baQUmI4E9XinS7zedeuJE6fBdFs5KdCLsY/jOkILxWc=; b=Z0WJD93vtBzsZ2e0MoED92lwkW1QQxRrkWSBy0sm35qRfYp/uVMdewmndhVahZ/dGu3h49WppmTq+eKlB5pHxWauL9X0gpxnRag9FuYAyJoxGJe0OURSGf15xb3zQhizgHAShxy/SoG+s1nOLy+TwgrE/AQF6fbfOJTC9uppjew= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+103512+1787277+3901457@groups.io; dmarc=fail header.from= (p=none dis=none) Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 1682401685906187.30702957250924; Mon, 24 Apr 2023 22:48:05 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id IRUkYY1788612xjDJeVlrsGA; Mon, 24 Apr 2023 22:48:05 -0700 X-Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by mx.groups.io with SMTP id smtpd.web11.72550.1682401675815309799 for ; Mon, 24 Apr 2023 22:48:04 -0700 X-IronPort-AV: E=McAfee;i="6600,9927,10690"; a="335560821" X-IronPort-AV: E=Sophos;i="5.99,224,1677571200"; d="scan'208";a="335560821" X-Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Apr 2023 22:48:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10690"; a="757978772" X-IronPort-AV: E=Sophos;i="5.99,224,1677571200"; d="scan'208";a="757978772" X-Received: from shwdeopenlab702.ccr.corp.intel.com ([10.239.55.92]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Apr 2023 22:48:02 -0700 From: "duntan" To: devel@edk2.groups.io Cc: Eric Dong , Ray Ni , Rahul Kumar , Gerd Hoffmann , Xiao X Chen Subject: [edk2-devel] [PATCH 3/3] UefiCpuPkg: Disable MTC packet by default Date: Tue, 25 Apr 2023 13:47:38 +0800 Message-Id: <20230425054738.2937-4-dun.tan@intel.com> In-Reply-To: <20230425054738.2937-1-dun.tan@intel.com> References: <20230425054738.2937-1-dun.tan@intel.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,dun.tan@intel.com X-Gm-Message-State: JGXeyPMBm4Cozd0qKE6H8ib6x1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1682401685; bh=jg5nRNQ2L97nuV3beQNdUySfRW0maDY97UDp7SGgH5w=; h=Cc:Date:From:Reply-To:Subject:To; b=QNKX8HyutyZwaacXC9+7M9mVt+L2vkIAis1cTU6YEPHphMeV40H6dxqKrU+xSAU2iKq /KkklIi95mpM6X6V0CTmoz40q0bSkZSDZvAfsHdFq4L0RasiR4WcHz0N8POX6gNwMrJRD 53bvwD7gN2cZeOkYI+rdfoxm/DcxAO/Ei0w= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1682401686936100011 Content-Type: text/plain; charset="utf-8" MTC packet is not needed and disable MTC packet by default. Bugzila: https://bugzilla.tianocore.org/show_bug.cgi?id=3D4423 Signed-off-by: Dun Tan Cc: Eric Dong Cc: Ray Ni Cc: Rahul Kumar Cc: Gerd Hoffmann Cc: Xiao X Chen --- UefiCpuPkg/Library/CpuCommonFeaturesLib/ProcTrace.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/ProcTrace.c b/UefiCpuP= kg/Library/CpuCommonFeaturesLib/ProcTrace.c index 1a101b7288..3f109bf29c 100644 --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/ProcTrace.c +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/ProcTrace.c @@ -538,6 +538,14 @@ ProcTraceInitialize ( CtrlReg.Bits.TSCEn =3D 0; } =20 + // + // MTC packet is not needed. Turn it off by default. + // + if (Ebx.Bits.Mtc =3D=3D 1) { + CtrlReg.Bits.MTCEn =3D 0; + CtrlReg.Bits.MTCFreq =3D 0; + } + CPU_REGISTER_TABLE_WRITE64 ( ProcessorNumber, Msr, --=20 2.39.1.windows.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. 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