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[2620:137:e000::1:20]) by mx.google.com with ESMTP id f7-20020aa79687000000b006590bb60328si3172000pfk.173.2023.06.15.20.46.47; Thu, 15 Jun 2023 20:47:01 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b="Zn/KopGR"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232707AbjFPDMh (ORCPT + 99 others); Thu, 15 Jun 2023 23:12:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233539AbjFPDMe (ORCPT ); Thu, 15 Jun 2023 23:12:34 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 176CC211C for ; Thu, 15 Jun 2023 20:12:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686885153; x=1718421153; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=SIlRmpyQygKYv0i3uwyThwyRnkqCbhHybrnKDoUIcE8=; b=Zn/KopGRylMtqM9awFZIki/QrwJjED6LALjBjoRkoEHMynA++ZJs2Out 9qGu3/jA0SdCIAw1L8YWfi7rrIYVhIRLpIKFFbkz0N5L7pgiMiyE4OB9o cILOi7qrygyZdexNW3VO8HISejAGPseyI7HX8VNoFr4q2Fa+xrHS/HPrO 7RpuFEDmfO1JlzhKmu547p1E+uy24OC33i/HiYCASeGlaMqqjTo54EvId MUgqicMuysbQ8IgwcYfH1yrrwtzALHy/Hz4JGBJ/ThIrNhEOhJ+jEmvIl qP/cPYmitaW+s8WEmfPqPWrskb22lQ79zdf+z4GlkLTmt/a/TYbGAQUOB g==; X-IronPort-AV: E=McAfee;i="6600,9927,10742"; a="359106657" X-IronPort-AV: E=Sophos;i="6.00,246,1681196400"; d="scan'208";a="359106657" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jun 2023 20:12:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10742"; a="663017410" X-IronPort-AV: E=Sophos;i="6.00,246,1681196400"; d="scan'208";a="663017410" Received: from allen-box.sh.intel.com (HELO [10.239.159.127]) ([10.239.159.127]) by orsmga003.jf.intel.com with ESMTP; 15 Jun 2023 20:12:30 -0700 Message-ID: Date: Fri, 16 Jun 2023 11:11:20 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Cc: baolu.lu@linux.intel.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH] iommu/vt-d: Fix to flush cache of PASID directory table Content-Language: en-US To: Yanfei Xu , dwmw2@infradead.org, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com References: <20230615071613.690639-1-yanfei.xu@intel.com> <3f60b35a-683c-5e18-c9d5-964df9331f0f@linux.intel.com> <5044217c-9380-f50a-2809-0e3dc80f7bd2@intel.com> From: Baolu Lu In-Reply-To: <5044217c-9380-f50a-2809-0e3dc80f7bd2@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/16/23 11:06 AM, Yanfei Xu wrote: >>> >>> Fixes: 194b3348bdbb ("iommu/vt-d: Fix PASID directory pointer >>> coherency") >> >> Do you need a Cc stable? > > Yes, will add Cc: I was not asking you to Cc stable, just reminded you to consider whether your change fixes any real problem and that problem could also happen with stable kernels. Best regards, baolu