From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: None (no SPF record) identity=mailfrom; client-ip=2607:f8b0:4001:c06::229; helo=mail-io0-x229.google.com; envelope-from=mw@semihalf.com; 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 8BC6321F3C1AE for ; Tue, 10 Oct 2017 07:52:50 -0700 (PDT) Received: by mail-io0-x229.google.com with SMTP id m16so15775114iod.1 for ; Tue, 10 Oct 2017 07:56:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=semihalf-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=r1hWcjLV+1oY2yXkRSVwFE43KOp79fScjJipRmWdfNo=; b=mO8EXcpG1xJgay+L/Y0gnoO/lT3/7SMtAQ/f0o50/m2PKvpJK3wtovUJDllgY2t9pZ YpEkvM4FL9VGZUIimRW56+H9AxKCULhwKnjw24/gO2RuishwCoLt5XHLqbCdgK5T6miD hp+j6jGMQWpJyBoaHUgtBbLhvI+IYOS0uFXf6D8e8qTvIuirWZtC2YTaOJH7KMpApoU1 76wN7Uq92SVR7iHLkWO5msiwVcLf0czvGdk5gQacjPpwFEKLiKmcGvp0ZAAOO2Sss6f8 U3eckIfL4WtzCKqDsUosqM1f9/4pUyMA4zVd7oVibltVuvMvEsUSuyr5MxCJHjM1qCNI oqpw== 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=r1hWcjLV+1oY2yXkRSVwFE43KOp79fScjJipRmWdfNo=; b=q7Ey0tfInXWoX+HpzsbHHAwOl8nKyhJEhV4f+gR6SaMgbECwySLbrYwzzVa5eGCjcG zHBudC+j/8KMswj0xMSL24fmhweWjkfapWQI67v7MwIkPeDKgxA/j1yxjMa/DUoHlHJ8 Ur43ARk1D6t/RCTF16BGLUA9nt4bTNEZZE4ymE4O1eXO0HhZ13iCF7yKOY77eUwlOt/c eAj0hooW43gKEGgoc2Z0L7txG9labKl94YKf2iQnNIx1OTQIOYAoPuOa0dm8qS5YFX+Y DMTfvTjdRGBJsgdY8kl72glD7rcKzJRk0HcqafpcKcmEOiRSZnkx7/U5NTc9/hD+U5JE 8Rqg== X-Gm-Message-State: AMCzsaWbczF8rDTp6mwo5i7ek7XJm4zgMKgWgwU09ExRRe2RU8ODx+Mz ReIHJge/bY3KX2+GqWwh+U8wXW8KmiCobCpPc86aTN6u X-Google-Smtp-Source: AOwi7QDAMSghaF1YRQhGRkqfAVn0Z5qrOMa3WN7rCpSOl0pMdGpETjDgqnsBVexCyAaUOLT0NNaE7AfoM5Wew6+Nk0Y= X-Received: by 10.107.56.130 with SMTP id f124mr14274699ioa.33.1507647378307; Tue, 10 Oct 2017 07:56:18 -0700 (PDT) MIME-Version: 1.0 Received: by 10.107.157.141 with HTTP; Tue, 10 Oct 2017 07:56:17 -0700 (PDT) In-Reply-To: <20171010145353.do7b6msel3d25pyu@bivouac.eciton.net> References: <1507568462-28775-1-git-send-email-mw@semihalf.com> <1507568462-28775-9-git-send-email-mw@semihalf.com> <20171010145353.do7b6msel3d25pyu@bivouac.eciton.net> From: Marcin Wojtas Date: Tue, 10 Oct 2017 16:56:17 +0200 Message-ID: To: Ard Biesheuvel Cc: edk2-devel-01 , Leif Lindholm , nadavh@marvell.com, Neta Zur Hershkovits , Kostya Porotchkin , Hua Jing , semihalf-dabros-jan Subject: Re: [platforms: PATCH 08/13] Marvell/Armada: Modify GICC alias X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Oct 2017 14:52:50 -0000 Content-Type: text/plain; charset="UTF-8" Hi Ard, 2017-10-10 16:53 GMT+02:00 Leif Lindholm : > On Mon, Oct 09, 2017 at 07:00:57PM +0200, Marcin Wojtas wrote: >> From: Ard Biesheuvel >> >> The GIC architecture mandates that the CPU interface, which consists >> of 2 consecutive 4 KB frames, can be mapped using separate mappings. >> Since this is problematic on 64 KB pages, the MMU-400 aliases each >> frame 16 times, and the two consecutive frames can be found at offset >> 0xf000. This patch is intended to expose correct GICC alias via >> MADT, once ACPI support is added. > > I'm afraid I don't quite understand this message. > > The change seems to be that the InterfaceBase moves from the first 4KB > alias inside a 64KB page to the last alias within the same page. > That seems valid, but I don't see how it resolves anything described > in this message? > Can you recall what issue was fixed thanks to this patch? Best regards, Marcin