From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 53087C77B7F for ; Fri, 27 Jun 2025 08:23:20 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uV4MV-000810-Ut; Fri, 27 Jun 2025 04:23:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uV4MI-0007zu-61 for qemu-devel@nongnu.org; Fri, 27 Jun 2025 04:22:56 -0400 Received: from mgamail.intel.com ([198.175.65.15]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uV4MA-0001Q1-1F for qemu-devel@nongnu.org; Fri, 27 Jun 2025 04:22:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1751012566; x=1782548566; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=Kbz47DuMnWT0v9tfwC0nho0rIfl4eEfmfBomwBJYoKA=; b=A12aqH3w0LjcFncnNOlTSybDsEzzDYMQhrXX9IJcel9J647K7LiOD/yk QLyS5xvT5dn4NTFa+t62odb1Pgekeki1AKQheeLAxLcNK42/+PIuIYmDf BHmsv8KyqV33L2CnjtXy0l5Ur9Yty4QIn4l5nFp83ej5mRTILjdxU47ri VDFFyutEPnlxWtVpvcZ40PQT3A0UuzgpSfL0bnQ2aNTKRIFJquyFy2ssY wzvsk3SYLAJ58bfdE3bJjPfyMWtGHlPwjons+6KL+5eQsiwgRlwGnjJ2+ wyXjLjSeZc394ZZSn+PrjJSKTSAvnn4eLT5w+cWnWgRRtgWQGcLkkU051 w==; X-CSE-ConnectionGUID: U81rmcAcQy2wNA0JwEnuAA== X-CSE-MsgGUID: V438YjZQQcWjy96D8AgMaw== X-IronPort-AV: E=McAfee;i="6800,10657,11476"; a="57000815" X-IronPort-AV: E=Sophos;i="6.16,270,1744095600"; d="scan'208";a="57000815" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2025 01:22:43 -0700 X-CSE-ConnectionGUID: Yy3HybgzQI6OBoEZwlTfXg== X-CSE-MsgGUID: mlLRaNBtSFOc+PXLlxDLmQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,270,1744095600"; d="scan'208";a="153456758" Received: from liuzhao-optiplex-7080.sh.intel.com (HELO localhost) ([10.239.160.39]) by fmviesa010.fm.intel.com with ESMTP; 27 Jun 2025 01:22:41 -0700 Date: Fri, 27 Jun 2025 16:44:03 +0800 From: Zhao Liu To: Xiaoyao Li Cc: Paolo Bonzini , qemu-devel@nongnu.org Subject: Re: [PATCH] i386/tdx: Don't mask off CPUID_EXT_PDCM Message-ID: References: <20250625035710.2770679-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250625035710.2770679-1-xiaoyao.li@intel.com> Received-SPF: pass client-ip=198.175.65.15; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, Jun 25, 2025 at 11:57:10AM +0800, Xiaoyao Li wrote: > Date: Wed, 25 Jun 2025 11:57:10 +0800 > From: Xiaoyao Li > Subject: [PATCH] i386/tdx: Don't mask off CPUID_EXT_PDCM > X-Mailer: git-send-email 2.43.0 > > It gets below warning when booting TDX VMs: > > warning: TDX forcibly sets the feature: CPUID[eax=01h].ECX.pdcm [bit 15] > > Because CPUID_EXT_PDCM is fixed1 for TDX, and MSR_IA32_PERF_CAPABILITIES is > supported for TDX guest unconditioanlly. > > Don't mask off CPUID_EXT_PDCM for TDX. > > Signed-off-by: Xiaoyao Li > --- > target/i386/cpu.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) Reviewed-by: Zhao Liu