Received: by 2002:a05:6358:1087:b0:cb:c9d3:cd90 with SMTP id j7csp4028906rwi;
        Sun, 16 Oct 2022 23:51:04 -0700 (PDT)
X-Google-Smtp-Source: AMsMyM7yHhZMD+7j0cxi1+Mv7JMjEB0X9B8cbI/0b1hkXvqlmUtp68wdtjXbBPRRYYJdhQTqgMYU
X-Received: by 2002:a05:6a00:1a08:b0:545:362c:b219 with SMTP id g8-20020a056a001a0800b00545362cb219mr11015425pfv.27.1665989464589;
        Sun, 16 Oct 2022 23:51:04 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1665989464; cv=none;
        d=google.com; s=arc-20160816;
        b=X10RRDQwhoPyylM5icekGXbLZIzLM1uGhV/ZUlWQlI+VzMhmbJOit3edZht8xp7vWL
         98Sdmbph71LUQOfJti6X2G/4NiPGYK1lyPQPqnwMGrtzyCd6qp2KxfSTYeXibyDjNeRE
         FqlybOb3VR0ME4lORGcMMI20ftbtzqiZZdB9lurlO8G9ywS17NdZQF8dKyV62DOwG98U
         YVKOc6z3tWoZJ1wSCpiRvL+YePNpeDgOZbU2KPRNtKhyG6UnD3GhkcbUvE4D2seO6Hhv
         vDqODWLDtK13CVBIiBpnSb3k8iOY34LV1Yj1w3wiQXQ+9X99ued8750VYMqJWfgiP0GK
         ru3Q==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:in-reply-to:content-disposition:mime-version
         :references:message-id:subject:cc:to:from:date:dkim-signature;
        bh=bMvF5Nhdo+jnm47wBDRGsad0a/S1qc9SVkdHSXSEiAc=;
        b=0/Sqo8uoD9iyCjFqLq0muDIUQjZGL2xiAnSpWJLwKxIFr0LLFfHO5oUsll6uodMcSz
         hnvgzIRLGT315PAnKYRGskgfFdizKnsjfNmHI0DI8a4MLxSjOdFCBS/+lOVjS6nXAxkT
         dOaFlXrA1+7wceI+YjVJ1tEsPOMbbQX9/Yyer+38YsapLuPPmKA0+hloTTPsEJxX7/5I
         V6iyaLpj6ftAmCZGptUsnIe6ClJXm6353IpFUmwiHgAg7uZFJiWFkxjqe/ZWR1rv4PEY
         LLgcojy03zUwYxS9znTKdpAJzNMBs8trqeGXFNEEnp7LZ2zYsQ4tcUIC/grr+rvMWy9t
         7BdQ==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=RG1DTM3Y;
       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
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20])
        by mx.google.com with ESMTP id q138-20020a632a90000000b0042b807728e3si11061004pgq.762.2022.10.16.23.50.52;
        Sun, 16 Oct 2022 23:51:04 -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=@infradead.org header.s=bombadil.20210309 header.b=RG1DTM3Y;
       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
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S230157AbiJQG0x (ORCPT <rfc822;aradford@gmail.com> + 99 others);
        Mon, 17 Oct 2022 02:26:53 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34810 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S230104AbiJQG0w (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 17 Oct 2022 02:26:52 -0400
Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AE872E69B;
        Sun, 16 Oct 2022 23:26:50 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
        d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version
        :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:
        Content-Transfer-Encoding:Content-ID:Content-Description;
        bh=bMvF5Nhdo+jnm47wBDRGsad0a/S1qc9SVkdHSXSEiAc=; b=RG1DTM3Yne7/F9AIu+aH5R1SaE
        ahv2TsuEeSe6ETKaosVTsnBQD/+ytEtQWC14ffCHOmEcAkK4MYExkuQ/qjKxNUN72/5hyvLI+XlAT
        GTB4RrX6TSkE/UqvetGBgeKBsRCdl9nnVqq/1ELWDk8tFiBvVpPjPcSXJuHIXtk3IIdyELqkXlE8U
        hYVTTodbZwWwgfCaRvInFknnhKlC5b6MsVbpgbOAKBTPZ9Hh2rCWlmYLPZNTsCdcPbXHurGrmGSu+
        Q+kFpMpc3E53HAjF1lFyttOYDy+CMblSOBZfpcvziLwCM2HxVYFBzCo+o0bOyoWdq5vZoDMbT/nee
        aFeyWPYQ==;
Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux))
        id 1okJaK-007uUt-7G; Mon, 17 Oct 2022 06:26:48 +0000
Date:   Sun, 16 Oct 2022 23:26:48 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Rui Ma <Rui.Ma@amd.com>
Cc:     helgaas@kernel.org, linux-kernel@vger.kernel.org,
        linux-pci@vger.kernel.org, Alexander.Deucher@amd.com,
        bhelgaas@google.com
Subject: Re: [PATCH] PCI/IOV: Decrease VF memory BAR size to save host memory
 occupied by PTEs
Message-ID: <Y0z1qIG3i3+CZRiX@infradead.org>
References: <20221011112325.992317-1-Rui.Ma@amd.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20221011112325.992317-1-Rui.Ma@amd.com>
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html
X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,
        SPF_NONE 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: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Besides the various style issues:  I don't think we can just
hardcode specific devices in the PCIe core.  If we want to do this
we'll need something like PCIe extended capabilities or ACPI tables
to describe the behavior in a standardized way.