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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBDE7C433F5 for ; Wed, 17 Nov 2021 20:55:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9EFF161B1B for ; Wed, 17 Nov 2021 20:55:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239059AbhKQU57 (ORCPT ); Wed, 17 Nov 2021 15:57:59 -0500 Received: from mga18.intel.com ([134.134.136.126]:26861 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235689AbhKQU55 (ORCPT ); Wed, 17 Nov 2021 15:57:57 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10171"; a="220937089" X-IronPort-AV: E=Sophos;i="5.87,241,1631602800"; d="scan'208";a="220937089" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2021 12:54:57 -0800 X-IronPort-AV: E=Sophos;i="5.87,241,1631602800"; d="scan'208";a="672536002" Received: from kkempf-mobl2.amr.corp.intel.com (HELO skuppusw-desk1.amr.corp.intel.com) ([10.255.92.124]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2021 12:54:56 -0800 Subject: Re: [PATCH] x86/paravirt: Fix build PARAVIRT_XXL=y without XEN_PV To: Dave Hansen , Borislav Petkov Cc: "Kirill A. Shutemov" , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Andi Kleen , x86@kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" , Juergen Gross , Deep Shah , "VMware, Inc." References: <20211117181439.4368-1-kirill.shutemov@linux.intel.com> <20211117184225.6e257nfpdd2qhrj4@box.shutemov.name> <4824bf30-851e-c927-a50f-87fa2a429b2a@linux.intel.com> <980ceab6-6686-c8f3-72b8-5743ca517bdf@linux.intel.com> <0f0b9784-1902-1526-2796-7d1a7ab17fb6@intel.com> From: Sathyanarayanan Kuppuswamy Message-ID: <21f1325d-d97e-1bb7-ea87-d84e44089ab4@linux.intel.com> Date: Wed, 17 Nov 2021 12:54:56 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <0f0b9784-1902-1526-2796-7d1a7ab17fb6@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/17/21 11:57 AM, Dave Hansen wrote: > If it really is just about idle, perhaps Peter's suggestion warrants > investigation. But, we need to know the root cause instead of simply > tossing around "requirements". It is not only for idle case. We also need to support emulation of normal halt case (which is used in cases like reboot or early_fixup_exception(), etc.). -- Sathyanarayanan Kuppuswamy Linux Kernel Developer