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=-3.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 CC0FFC2BA1B for ; Tue, 7 Apr 2020 08:30:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 99A3C20719 for ; Tue, 7 Apr 2020 08:30:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=9elements.com header.i=@9elements.com header.b="B+xIf7Lr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727981AbgDGIaR (ORCPT ); Tue, 7 Apr 2020 04:30:17 -0400 Received: from mail-wr1-f67.google.com ([209.85.221.67]:33474 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726687AbgDGIaR (ORCPT ); Tue, 7 Apr 2020 04:30:17 -0400 Received: by mail-wr1-f67.google.com with SMTP id a25so2872691wrd.0 for ; Tue, 07 Apr 2020 01:30:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=bjnqIOw/64UQcMVXxP2HD9T2UIEtrKARcLY/HHXuepw=; b=B+xIf7LrFVj/ug5XH1E/s6FhhIXn71JDZDAtx7pUHGPzZ285a1FcD58Mq98o3Zhhb3 2dcf+apBwPnaTla0J+J+W3uP3bHomuQMPzdqkHMj1A5T/DjrGlvBgd8MVa0+UDNv73mR J0iXUHGAizCSurnz6QFQHPYnfFq+JqHN1sWH8gCntQXXthgv+orE435eRnkAyous8NoK pvOX0X1Ole1qobSOudaRsdYsfXT/evwkaKN2y207fivB1lfKZbOo0tb/Rzo56fVsmaFd 2vfNCX5OwcJvYSQAiwE8IJCojx7VS8Novt6RRc3GpDvtRgivGmbzf6WsCUC8JUpERADr 33kg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=bjnqIOw/64UQcMVXxP2HD9T2UIEtrKARcLY/HHXuepw=; b=ae+leR+5v/VTNhP1GE4HSxFxSVfyPteL5bffjtx4NvUpK1oO0JNc6a5w6orC9mwSna /ZSZbxCuashfxCdJo63fPO2veSWnsMVQXGSy8Dz5K3QsDjSiY91TwdxBVV2UaE3yZ5xt iBhn0ti3/28FoqUZR3LyJYbcMJeEgFhiOk6H9AxPkSx3MT9gOiuMuEviELnXI98h4MM+ ol06R9OA7GNiukxms00bK73kirHmobUQzoQ1lFavhWPV1S/GrPYvnSVcdxIh9cKUTxK3 ydFJ3bM+P1Ov0a2c9LVkiI42BQ6EAQFnI/6MnQkHOoXothZUNSIgM97Na88l4plrPj7r NcLg== X-Gm-Message-State: AGi0PuYR4pOVxFSX75rjVPM5B7Pj8BDpwaf+yKapgAzuYfISEn5aVjK7 +5hoYuk5RCaDng14Vmk+rdRWvOhdJoE0culA X-Google-Smtp-Source: APiQypJ93wNSP368wCVt3Ckg5cs2DoYF36j4Rpl82GUvt99HweZnWg7ZOEqe853jNO0v/H8JAAZqNQ== X-Received: by 2002:adf:a343:: with SMTP id d3mr1426273wrb.163.1586248214691; Tue, 07 Apr 2020 01:30:14 -0700 (PDT) Received: from localhost.localdomain (ip-94-114-101-228.unity-media.net. [94.114.101.228]) by smtp.gmail.com with ESMTPSA id t16sm31190743wra.17.2020.04.07.01.30.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Apr 2020 01:30:13 -0700 (PDT) From: patrick.rudolph@9elements.com To: linux-kernel@vger.kernel.org Cc: coreboot@coreboot.org, Patrick Rudolph , Thomas Gleixner , Greg Kroah-Hartman , Alexios Zavras , Allison Randal , Julius Werner , Samuel Holland , Stephen Boyd Subject: [PATCH v4 0/2] firmware: google: Expose coreboot tables and CBMEM Date: Tue, 7 Apr 2020 10:29:05 +0200 Message-Id: <20200407082923.2001556-1-patrick.rudolph@9elements.com> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Patrick Rudolph As user land tools currently use /dev/mem to access coreboot tables and CBMEM, provide a better way by using read-only sysfs attributes. Unconditionally expose all tables and buffers making future changes in coreboot possible without modifying a kernel driver. Changes in v2: - Add ABI documentation - Add 0x prefix on hex values - Remove wrong ioremap hint as found by CI Changes in v3: - Use BIN_ATTR_RO Changes in v4: - Use temporary memremap instead of persistent ioremap - Constify a struct - Get rid of unused headers - Use dev_{get|set}_drvdata - Use dev_groups to automatically handle attributes - Updated file description - Updated ABI documentation Patrick Rudolph (2): firmware: google: Expose CBMEM over sysfs firmware: google: Expose coreboot tables over sysfs Documentation/ABI/stable/sysfs-bus-coreboot | 74 +++++++++++ drivers/firmware/google/Kconfig | 9 ++ drivers/firmware/google/Makefile | 1 + drivers/firmware/google/cbmem-coreboot.c | 128 ++++++++++++++++++++ drivers/firmware/google/coreboot_table.c | 58 +++++++++ drivers/firmware/google/coreboot_table.h | 14 +++ 6 files changed, 284 insertions(+) create mode 100644 Documentation/ABI/stable/sysfs-bus-coreboot create mode 100644 drivers/firmware/google/cbmem-coreboot.c -- 2.24.1