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=-11.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 A754AC433C1 for ; Fri, 26 Mar 2021 00:30:47 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 0EA9E619FC for ; Fri, 26 Mar 2021 00:30:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0EA9E619FC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=amsat.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58594 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lPaNB-0004Et-Rm for qemu-devel@archiver.kernel.org; Thu, 25 Mar 2021 20:30:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57626) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lPaK9-0002Od-Kz; Thu, 25 Mar 2021 20:27:39 -0400 Received: from mail-wr1-x431.google.com ([2a00:1450:4864:20::431]:42557) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lPaK6-00040W-UY; Thu, 25 Mar 2021 20:27:36 -0400 Received: by mail-wr1-x431.google.com with SMTP id x13so4003209wrs.9; Thu, 25 Mar 2021 17:27:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Knkj/RyLO7CUAQgShHIIeHkGAEGdZR261rELTSjtX1g=; b=M0C5w70LzoqLP3EN49v2Z/5T6KW0ekLgqMX4HIPf9YCZge21B15FEbSeXVRifhguEY IxzkbVSt7NMHabFcWDkHKsqVY9aVuXe9Y/tdt1dhocqMGQn0jnITXhzXhMY/TQroulF1 Y7jxDskMZiclWofhJ3UuZYwJUYRrWLlEx8x9N0nxw1QuPVUGryBXkENNLJIuzxSh30ya 0ZZmv6WLkqvH3dL4JB+aAkgehei83ydGVbWTbPN1gZ/71h9FCGMAiti5TuPZOBFz83To tJlmdRqQrzEm2+u4ZZU0uP/w+7h1TuD/+UVWO7RglvnpGQHLLErHxlYFF/ztIfiioS1F xpLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :mime-version:content-transfer-encoding; bh=Knkj/RyLO7CUAQgShHIIeHkGAEGdZR261rELTSjtX1g=; b=CgS1THj+AYARk+BuecsG1UbUz2yIhvxoXkHUbv1hYP1+WjD/AlE/9vqSgXDlW2yxTW l8uARP0itPR3Gg4lFhHUWTOizc8wjEpW4QGVRjwk1Fh2/Emt9E8e4y9mWJYFslywquTS /dXtmgrq1eLDjlV5PUPJZR6Q7g4NkGQslG052tZ9jaQS3MNUXqnm0qmrpwchVEc7yprx IG/hxR2DWv9bknjsMC2XWXi8aOXB/2sOqRMr5ARuxzzeufsKGnvLjIEDN2IdDUIpUTKx JByt2WFok/a04NIxzKPB+EnpzPHTOffSjJP3G2T83La+0d2TmQ8ohe0ydCOagxGyZUyr WJBg== X-Gm-Message-State: AOAM530X06Hx2MaA4wc+iy9g2o4PCRfAKmz4HtZDrP9sC3CcT2Fpx1qN XZ+NPpqCbD1yNwq/J1kKHMuumPu+zYLbmQ== X-Google-Smtp-Source: ABdhPJx9IAhbLnuylUj/DsIo4l86P5FX9EFJZXgP562nE6bW4dPRzZdv/frHYu4a22j0MNpO0TpWag== X-Received: by 2002:adf:fbc8:: with SMTP id d8mr11724322wrs.94.1616718451585; Thu, 25 Mar 2021 17:27:31 -0700 (PDT) Received: from localhost.localdomain (17.red-88-21-201.staticip.rima-tde.net. [88.21.201.17]) by smtp.gmail.com with ESMTPSA id x6sm8376233wmj.32.2021.03.25.17.27.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Mar 2021 17:27:30 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [RFC PATCH-for-6.1 00/10] hw/misc: Add memory_region_add_subregion_aliased() helper Date: Fri, 26 Mar 2021 01:27:18 +0100 Message-Id: <20210326002728.1069834-1-f4bug@amsat.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::431; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wr1-x431.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Mark Cave-Ayland , Alistair Francis , Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Laurent Vivier , qemu-arm@nongnu.org, qemu-ppc@nongnu.org, "Edgar E. Iglesias" , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi,=0D =0D This series introduce the memory_region_add_subregion_aliased()=0D helper which basically create a device which maps a subregion=0D multiple times.=0D =0D Examples are easier, so having a subregion aliased every @span_size=0D then mapped onto a container at an offset, you get something like:=0D =0D ^-----------^=0D | |=0D | |=0D | +-------+ | +---------+ <--+=0D | | +---------+ |=0D | | | | |=0D | | +-----------> | alias#3 | |=0D | | | | | |=0D | | | +---------+ |=0D | | | +---------+ |=0D | | | | | |=0D | | | +-------> | alias#2 | |=0D | | | | | | |region=0D | container | | | +---------+ | size=0D | | | | +---------+ |=0D | | | | | | |=0D | | | | +----> | alias#1 | |=0D | | | | | | | |=0D | | | | | +---------+ <--+ |=0D | | +-+---+--+--+ +---------+ | |=0D | | | | | | |span |=0D | | | subregion +-> | alias#0 | |size |=0D offset | | | | | | | |=0D +----> | +-------+ | +-----------+ +---------+ <--+ <--+=0D | | |=0D | | |=0D | | |=0D | | |=0D | | |=0D | ^-----------^=0D =0D I know it need more documentation and tests, but I prefer to send=0D as draft RFC for early review before spending more time on it.=0D =0D Based-on: <20210325120921.858993-1-f4bug@amsat.org>=0D https://www.mail-archive.com/qemu-devel@nongnu.org/msg795218.html=0D =0D Philippe Mathieu-Daud=C3=A9 (10):=0D hw/misc: Add device to help managing aliased memory regions=0D hw/arm/musicpal: Open-code pflash_cfi02_register() call=0D hw/arm/musicpal: Map flash using memory_region_add_subregion_aliased()=0D hw/arm/digic: Open-code pflash_cfi02_register() call=0D hw/arm/digic: Map flash using memory_region_add_subregion_aliased()=0D hw/block/pflash_cfi02: Remove pflash_setup_mappings()=0D hw/block/pflash_cfi02: Simplify pflash_cfi02_register() prototype=0D hw/misc/aliased_region: Simplify aliased I/O regions=0D hw/m68k/q800: Add MacIO container=0D hw/m68k/q800: Map MacIO using memory_region_add_subregion_aliased()=0D =0D include/hw/block/flash.h | 1 -=0D include/hw/misc/aliased_region.h | 91 +++++++++++++++=0D hw/arm/digic_boards.c | 28 ++++-=0D hw/arm/musicpal.c | 29 ++++-=0D hw/arm/xilinx_zynq.c | 2 +-=0D hw/block/pflash_cfi02.c | 36 +-----=0D hw/lm32/lm32_boards.c | 4 +-=0D hw/m68k/q800.c | 61 +++++-----=0D hw/misc/aliased_region.c | 185 +++++++++++++++++++++++++++++++=0D hw/ppc/ppc405_boards.c | 6 +-=0D hw/sh4/r2d.c | 2 +-=0D MAINTAINERS | 6 +=0D hw/arm/Kconfig | 2 +=0D hw/m68k/Kconfig | 1 +=0D hw/misc/Kconfig | 3 +=0D hw/misc/meson.build | 1 +=0D 16 files changed, 375 insertions(+), 83 deletions(-)=0D create mode 100644 include/hw/misc/aliased_region.h=0D create mode 100644 hw/misc/aliased_region.c=0D =0D -- =0D 2.26.2=0D =0D