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=-9.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,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 299D7C07542 for ; Mon, 27 May 2019 04:34:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 F32B521707 for ; Mon, 27 May 2019 04:34:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="rrHjaX5o"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="j+IVUH4G" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F32B521707 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=WpkjW+63Vfj1jkEx0mCU/JGYgAlyMfih9qiXiW59YEU=; b=rrHjaX5oo6LXT6 DjDMSRYTMe7ZIUHKFe23OTZ9d2w2WGCrYbs8xXgEBB8TTb6LA0WF2Vwf5jSUsYJHblO1uhmo/5GIV rcuzSbLYN7aykb0jn9Imr5nQTuq5WQRf0MM4KMb0K1P6sdQ0AJQUPp/rqQhQbXjvom4OA7tpwysN/ UfiKpHtmHyA3JN3HlBElguj4j3wBZzRn5JmHcA6sW2360XySP4vgBEe/KdR/k3YG2fa2NMi+w+vop BLoFhWBPWlsztE03mB5a4oIOydnu4PD5NLde1qgPoR+S54OHgv/sUVXaaIaxfKByzppe2xuQQTp05 vxGv8CdibhF2Wx7boxag==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hV7LR-0001Hh-S2; Mon, 27 May 2019 04:34:45 +0000 Received: from mail-pl1-x642.google.com ([2607:f8b0:4864:20::642]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hV7LO-0001EX-1k for linux-arm-kernel@lists.infradead.org; Mon, 27 May 2019 04:34:43 +0000 Received: by mail-pl1-x642.google.com with SMTP id d21so6536540plr.3 for ; Sun, 26 May 2019 21:34:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ck+F9ON2fnwh5hsuCM2qk61O5ay8betZRUcLdrsV0zI=; b=j+IVUH4GD9iVi5AQ0tl+V0V07fGHYVGHoxVefzWndaQjrffPAm/mM+Y1a4MoHG/U89 p4QW6JgFkcgCvXvu44W+yz5LXEyov6GrVrVr2UVCx0STuRuG3ubwLcBI05O8KwYQQfLS qLZSfJ4qa29snAGa1sfVHjphAC1pcvgYZ2mSU= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=ck+F9ON2fnwh5hsuCM2qk61O5ay8betZRUcLdrsV0zI=; b=cV0M0VFDjVZv0dXLCHTr3lszeOSGNFqEJbj/eUOgNAiPjDQzg0JXlNt0uqYzXyP6Nc NlbcGYKUbpsaLfxc2hjvXnwtbs1RgOLYQdcSTbLmpXGq+BMDixECWDkd0E6Sc280fR0F GccB5jBWKrRm+WOJj+WF/VDbkEc4TbEpIMkqHSLZfv66jro8osw8+xA6ZxmqWNNHQHbc jjP5b9iA7gIdpZNsFbOwCeZWCrRkGa6NH4ZpaQTi3fH9HyeqyQ1rhNAqF2fWqOImvytI /FO7xnyfN0R0S7auEjJy4dFvYGT40fX3mX0w/Ps8aDnHoSZPaQ/tkJ2z69uhfxcUuCVQ 6S3g== X-Gm-Message-State: APjAAAWLvZ2HiyP/SP2gFY8PJrj++jsTCpJw+OCkZto9akeVHfg6pLIY 3lpIUSWAOiKIkNDki9MskLn6oDmC9Veabw== X-Google-Smtp-Source: APXvYqyFrdw0mUt2bWg6+Evu1JeLd/Bd0yblbKAiu9bKbdKsHxgMYuF4cWcEbZG6DgbrO2oVmrykTQ== X-Received: by 2002:a17:902:42d:: with SMTP id 42mr3916281ple.228.1558931681051; Sun, 26 May 2019 21:34:41 -0700 (PDT) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:b852:bd51:9305:4261]) by smtp.gmail.com with ESMTPSA id g9sm8236061pgs.78.2019.05.26.21.34.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 26 May 2019 21:34:40 -0700 (PDT) From: Hsin-Yi Wang To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 3/3] arm64: kexec_file: add rng-seed support Date: Mon, 27 May 2019 12:33:36 +0800 Message-Id: <20190527043336.112854-3-hsinyi@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190527043336.112854-1-hsinyi@chromium.org> References: <20190527043336.112854-1-hsinyi@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190526_213442_110597_CE8D534B X-CRM114-Status: GOOD ( 14.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Nicolas Boichat , Yu Zhao , Kees Cook , Ard Biesheuvel , Catalin Marinas , Stephen Boyd , Will Deacon , linux-kernel@vger.kernel.org, Mike Rapoport , Jun Yao , Miles Chen , Rob Herring , James Morse , Hsin-Yi Wang , Andrew Murray , Andrew Morton , Laura Abbott , Frank Rowand , Robin Murphy Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adding "rng-seed" to dtb. It's fine to add this property if original fdt doesn't contain it. Since original seed will be wiped after read, so use a default size 128 bytes here. Signed-off-by: Hsin-Yi Wang --- arch/arm64/kernel/machine_kexec_file.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c index 58871333737a..d40fde72a023 100644 --- a/arch/arm64/kernel/machine_kexec_file.c +++ b/arch/arm64/kernel/machine_kexec_file.c @@ -27,6 +27,8 @@ #define FDT_PROP_INITRD_END "linux,initrd-end" #define FDT_PROP_BOOTARGS "bootargs" #define FDT_PROP_KASLR_SEED "kaslr-seed" +#define FDT_PROP_RNG_SEED "rng-seed" +#define RNG_SEED_SIZE 128 const struct kexec_file_ops * const kexec_file_loaders[] = { &kexec_image_ops, @@ -102,6 +104,23 @@ static int setup_dtb(struct kimage *image, FDT_PROP_KASLR_SEED); } + /* add rng-seed */ + if (rng_is_initialized()) { + void *rng_seed = kmalloc(RNG_SEED_SIZE, GFP_ATOMIC); + get_random_bytes(rng_seed, RNG_SEED_SIZE); + + ret = fdt_setprop(dtb, off, FDT_PROP_RNG_SEED, rng_seed, + RNG_SEED_SIZE); + kfree(rng_seed); + + if (ret) + goto out; + + } else { + pr_notice("RNG is not initialised: omitting \"%s\" property\n", + FDT_PROP_RNG_SEED); + } + out: if (ret) return (ret == -FDT_ERR_NOSPACE) ? -ENOMEM : -EINVAL; @@ -110,7 +129,8 @@ static int setup_dtb(struct kimage *image, } /* - * More space needed so that we can add initrd, bootargs and kaslr-seed. + * More space needed so that we can add initrd, bootargs, kaslr-seed, and + * rng-seed. */ #define DTB_EXTRA_SPACE 0x1000 -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel