From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=2607:f8b0:4001:c06::229; helo=mail-io0-x229.google.com; envelope-from=ard.biesheuvel@linaro.org; receiver=edk2-devel@lists.01.org Received: from mail-io0-x229.google.com (mail-io0-x229.google.com [IPv6:2607:f8b0:4001:c06::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 6F1D120954CC1 for ; Tue, 13 Mar 2018 00:58:22 -0700 (PDT) Received: by mail-io0-x229.google.com with SMTP id d21so7271940ioc.5 for ; Tue, 13 Mar 2018 01:04:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=o5ja6iisEK9+TvP1eESObLs9k0+BHiv+B81HALx39hM=; b=btHkxVbUyPSe06ugvuRLqdG8qsH0t4vVxGiUIpHzrDr9/BxXRRxQUL06aUy8tC99+N fBV5Nlm8toHzmvVDzazPIu76SPZJ+BedaCZBrjAWpzjgpECpgdUTGzTGO0ssKmbu13cl cbo1MFJQ/GA1GJ+KS6uE1xBWkpbGYIMUWWiw0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=o5ja6iisEK9+TvP1eESObLs9k0+BHiv+B81HALx39hM=; b=bN3X4l5IvQFUaqQaVMZIiVXd9MT+X2gXnhJ9JDdGO8kiinoo3y77bo+ndXfM4WeKvq WJzkUjG02qNjgKWsDWknBZuOOgqck0g4Nlir5JI6lwoPVzrDVMZDNsrqUjss9ivfz0UA K/iF9PEretIAJ6MgrjRUFyiomfY0VpkxgQYyuGWzxpz1DOWfC53ozSLPoENqSxILj9v0 73FDK/PObP1lalo4vXvJZLv9R5yNhVWNf8hDu83Hxu0qqe4Hw9WG0HsZS2DXv1sGhTbL V/fvNo3ku8RfEslc9iwD0mNWJv6oNqHdbCyWQ4YhnNTBTsK73LceaMeLvWOLIEFnyVjp KQyw== X-Gm-Message-State: AElRT7HvDNM8E7tnJFaLklnx47BfP/ApCDc+5xtDjYOnkzXdm2MUt7Pp inp+EjVGnwvQkocWHE3k8jPoheFZKCCYvNGfBxEe8g== X-Google-Smtp-Source: AG47ELv+VxzMH/wC8YVcGRvzfGdbtgDuK6ajOXu5TSc+mfd/jm4219Vn3QInodR8UknaE2Ios0zo8SYsrD6HrarWJ24= X-Received: by 10.107.41.16 with SMTP id p16mr11822047iop.173.1520928282998; Tue, 13 Mar 2018 01:04:42 -0700 (PDT) MIME-Version: 1.0 Received: by 10.107.138.209 with HTTP; Tue, 13 Mar 2018 01:04:42 -0700 (PDT) In-Reply-To: <20180313073107.GD96299@SZX1000114654> References: <1519887444-75510-1-git-send-email-heyi.guo@linaro.org> <1519887444-75510-5-git-send-email-heyi.guo@linaro.org> <20180306024440.GA90780@SZX1000114654> <71a21699-a1b3-155a-e743-ee5e6288ce20@Intel.com> <20180313073107.GD96299@SZX1000114654> From: Ard Biesheuvel Date: Tue, 13 Mar 2018 08:04:42 +0000 Message-ID: To: Guo Heyi Cc: "Ni, Ruiyu" , "edk2-devel@lists.01.org" , Star Zeng , Eric Dong , Laszlo Ersek , Michael D Kinney Subject: Re: [PATCH v5 4/6] MdeModulePkg/PciHostBridgeDxe: Add support for address translation X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2018 07:58:22 -0000 Content-Type: text/plain; charset="UTF-8" On 13 March 2018 at 07:31, Guo Heyi wrote: > Hi Ray, > > If the major concern is about backward compatibility, we can think about ways to > get around of this, e.g. add a feature PCD to turn on translation and set the > default value to false. > I don't think that is necessary. Like any other project, internal Intel projects should occasionally expect to have to adapt their code to accommodate upstream changes. If that is an issue, they should use a UDK branch instead.