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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13AFBC433E3 for ; Fri, 22 May 2020 14:10:46 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E055422226 for ; Fri, 22 May 2020 14:10:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E055422226 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=citrix.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jc88b-0008U9-1G; Fri, 22 May 2020 13:55:01 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jc88Z-0008U4-I4 for xen-devel@lists.xenproject.org; Fri, 22 May 2020 13:54:59 +0000 X-Inumbo-ID: d28a5992-9c33-11ea-ae69-bc764e2007e4 Received: from esa6.hc3370-68.iphmx.com (unknown [216.71.155.175]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id d28a5992-9c33-11ea-ae69-bc764e2007e4; Fri, 22 May 2020 13:54:58 +0000 (UTC) Authentication-Results: esa6.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none IronPort-SDR: LOEMMvQG1ac9ouyD5JCkDfvFyZREDLzgACTZ7g+zx61aJv5f68UArgf0/6vGVvrDjGAhps7zm5 FtHqkmdbfBRzfrufN+xt+E6qeSZesySCVtgVBKEYBl4TUk4K6irHifXGaFMLQk3yPrN7Zyxt2m 4vA4qrebewRiE0kyd+UvvqMjlr0QVPxpz8XX55ZQf5E0C5l4t0lE6VoCYO5cGXdvgv8BIK+QQ4 kiSt2hQ6OgN/iKwX6AM+9UE59xvF17VMMIraNWTdadK5lJqqDrJt7+BBJuz5RimStYPcRBVpqV OX8= X-SBRS: 2.7 X-MesageID: 18543226 X-Ironport-Server: esa6.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.73,422,1583211600"; d="scan'208";a="18543226" Date: Fri, 22 May 2020 15:54:29 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Jan Beulich Subject: Re: [PATCH v4] x86/idle: prevent entering C6 with in service interrupts on Intel Message-ID: <20200522135429.GD54375@Air-de-Roger> References: <20200521092258.82503-1-roger.pau@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: AMSPEX02CAS02.citrite.net (10.69.22.113) To AMSPEX02CL02.citrite.net (10.69.22.126) X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-devel@lists.xenproject.org, Wei Liu , Andrew Cooper Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On Fri, May 22, 2020 at 03:42:10PM +0200, Jan Beulich wrote: > On 21.05.2020 11:22, Roger Pau Monne wrote: > > Apply a workaround for Intel errata BDX99, CLX30, SKX100, CFW125, > > BDF104, BDH85, BDM135, KWB131: "A Pending Fixed Interrupt May Be > > Dispatched Before an Interrupt of The Same Priority Completes". > > While the change looks good to me as far as Broadwell goes, I > think it was before this posting that Andrew also pointed at > a specific Haswell erratum instance, still on the v3 thread. > Am I to imply a v5 will follow adding affected Haswell models > to the table? Those refer to a different errata, see: https://lore.kernel.org/xen-devel/84486d84-4452-af18-f7e7-753faf5a125d@citrix.com/ So we believe this also affects Haswell, but the errata is not published for those CPUs (yet at least). If/when it's published I'm happy to add it, in the meantime I think we should go with what has been published by Intel. Roger.