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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 D4D28C43331 for ; Thu, 2 Apr 2020 03:36:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8856520747 for ; Thu, 2 Apr 2020 03:36:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="vEvXtqqA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387450AbgDBDgy (ORCPT ); Wed, 1 Apr 2020 23:36:54 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:50951 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387419AbgDBDgy (ORCPT ); Wed, 1 Apr 2020 23:36:54 -0400 Received: by mail-wm1-f65.google.com with SMTP id t128so1895256wma.0 for ; Wed, 01 Apr 2020 20:36:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=m4LdVgh/bvsyv9ZErCSctVO5OR+focWDV/5XQQ8F7AU=; b=vEvXtqqAUPaUcCi3tCJN0g8gIg6t7Nzb/0+Eiawfl6fv9xfoD64GhJxFCciuDo34W7 R3UYwsNvVPTvLPzacryiAdF+TFbL9UcXbOTvCSxeuB7q/EHtWYWutAttxgDrDfU/bluV TO4GKdjMbc7Wtk76OXbR0yIkPmOszbWDVh70I1jPOahJYbF1ihCMpfw38wmfSXYPcE9g qTtrw33USTAxbOzS7+PzffYBBrcCjqiLEJJIJQwJCrJG4fti4huyewpK68vPyX/Bln6q RWC9uDKmKnmzPrcZqJDQjTtLTW2GWYfpFeK5eZ242sy8AZpZshd7Ec9ELfF+8FIL5fzQ 0r+Q== 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; bh=m4LdVgh/bvsyv9ZErCSctVO5OR+focWDV/5XQQ8F7AU=; b=iVY1T3K/3joSzfAk0fr8zWsqI4AM1RZX4NxmVrKzNq+LPVDpa7VvDK47lwtyDPSPlM 8cSMc/sgu4BVZxJ5fTOQpr4otXM2HpOQV1hFSP5TUTOdX1JgYRr4rSLJZfCLf3Ce9wmK Z6wxGgF/3IVPOaSB7pDh37bw/ZOSkdMmvyBUQ0DDEG9AlUTJCPHa4H/GSje/7Lfs//0G 0LBSaF1m8vHdkGOhEnovW19r/W6PZdKfdLGVAKgC4OGicEGQljS44kkdCAdYwALqHmZU EUqBmV5l/cydkv9LtAsGUWq4xeg/uTzrcn7GYfhMd6gWubwOibnVjt3bdrXsj0EcceNv 2WuQ== X-Gm-Message-State: AGi0Pua0MNdEXT/RnKdIBiZtwGAMMm9PuLURjrEjKhuQplZHvpuVMQAD d9GwpQ8uHt5fD3AtmbEnkjqwfDGZ X-Google-Smtp-Source: APiQypIZmgCgGltE3CfA0zMYWpj4xYNsprkY0A+5KhTVNXGpiYfRakT0Y8C9MoW/KGQjCRAb7SVV8A== X-Received: by 2002:a1c:cc0a:: with SMTP id h10mr1114554wmb.127.1585798611645; Wed, 01 Apr 2020 20:36:51 -0700 (PDT) Received: from localhost.localdomain ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id n124sm5402841wma.11.2020.04.01.20.36.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Apr 2020 20:36:51 -0700 (PDT) From: Florian Fainelli To: linux-kernel@vger.kernel.org Cc: Florian Fainelli , hsinyi@chromium.org, geert+renesas@glider.be, will@kernel.org, swboyd@chromium.org, robh@kernel.org, tytso@mit.edu Subject: [PATCH] Documentation: dt-bindings: Document 'rng-seed' for /chosen Date: Wed, 1 Apr 2020 20:36:40 -0700 Message-Id: <20200402033640.12465-1-f.fainelli@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The /chosen node can have a 'rng-seed' property read as a u32 quantity which would contain a random number provided by the boot agent. This is useful in configurations where the kernel does not have access to a random number generator. Signed-off-by: Florian Fainelli --- Documentation/devicetree/bindings/chosen.txt | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt index 45e79172a646..126b31eecfeb 100644 --- a/Documentation/devicetree/bindings/chosen.txt +++ b/Documentation/devicetree/bindings/chosen.txt @@ -28,6 +28,19 @@ mode) when EFI_RNG_PROTOCOL is supported, it will be overwritten by the Linux EFI stub (which will populate the property itself, using EFI_RNG_PROTOCOL). +rng-seed +-------- + +This property is used to initialize the kernel's entropy pool from a +trusted boot agent capable of providing a random number. It is parsed +as a u32 value, e.g. + +/ { + chosen { + rng-seed = <0xcafef00d>; + }; +}; + stdout-path ----------- -- 2.17.1