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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 AE28FC3A59B for ; Mon, 19 Aug 2019 07:17:51 +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 7B25D2085A for ; Mon, 19 Aug 2019 07:17:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="RE6VtAgz"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="XUWbUOUN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B25D2085A 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=6pBPxktlsW/2uvkneBDvFpaC7YINwMR7OcEW5q7R0AQ=; b=RE6VtAgze3il7u 0KLSdqq32dj6Ph09hZf5VEqUe1By7aaKEx9ev/BuRcZNhukggmjj/ZD/r/NfOEoevADWkHV0k8Gbe uAxxd6RN1Q3dCWI6euL0nzMJUhcurLGyA/RkEPnErV/79BXozTienFYd57c7aGmcb4KVpt/XMBmSU rAAEMNcxwR2TA98n33LoQsrWauxEjJhF/ZTm8s1Dzr7RkToVzXAHMYnFSWSt267x1SIC1lP5+xxcC k1xAtWvLA7urPSUnTbjC0ggyjzSt8348f4JaJozirAFFqIpCrc5la8IRAYQAqzCgY9fsXJAkENW4k OhuozApQGxcOOiNmIhsQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hzbvE-0000nz-O3; Mon, 19 Aug 2019 07:17:44 +0000 Received: from mail-pf1-x441.google.com ([2607:f8b0:4864:20::441]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hzbuh-0000QJ-RH for linux-arm-kernel@lists.infradead.org; Mon, 19 Aug 2019 07:17:13 +0000 Received: by mail-pf1-x441.google.com with SMTP id o70so641895pfg.5 for ; Mon, 19 Aug 2019 00:17:11 -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=tR696xAAXNPhHQHWLfe5SFLSbtEnSL98XLrp0/RNG7k=; b=XUWbUOUNVffLbuYbKroAviugg0hNCu6c0LsB1p5k0zj3Qdmtftgjzhs502Kv30r2r5 yKf5sQ0E0iFOPrxkWs0+CwLLLDrZaV3Y1j53slHNVQMXFTeHNDxlwhv1OSEt7gAXqvmi wtSm2YchTL7KT4XHT8HMfe9UN3zBGQL0sJ+EY= 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=tR696xAAXNPhHQHWLfe5SFLSbtEnSL98XLrp0/RNG7k=; b=Bsaj+9k+eBINY1L/vSjDKXgBHyV1ZayZ/3hwpUXiyuhXOyMYe5bgF7P8TGmb4+h14h u7I6NmWU5vVWtN2A7zLh7jjJDMRbZFwfThyL0Ea9cuUiTQYnfYA9cvIVl7AoFsJHgo57 ns3PCzdOOmgqOguAep8QH2ucWA5EBFrD8phexCuskec2vWICQy8MTJxeIil74Tp8443D 9/aJTw3VktlsFQsjRtblz6lJtazD8gWTC07Bo9rTE/bp4jjhkiq8T9R5uN4O19oByBf7 lI0Rio6cS1ygpaLrM3AeeD5KwsJpSiRnlcbBa2+mtd2s+4N41VsITe+4YBWMuhq1CyW5 QOIg== X-Gm-Message-State: APjAAAUKMQ5/hMZR02KYoNDvLVUEWtnGmYRbhoQiP5OnEAKhba0rDok8 SHy6RMYUwlAKPwkK6XSjjC7N2pqyGp0= X-Google-Smtp-Source: APXvYqxbjy8xxbqjY1yDYLo3dzifZ+5rEbkil94KZlbs277/axZ6oTlZhe0X2TtcA6D0EKfdo7cQ0g== X-Received: by 2002:aa7:83c7:: with SMTP id j7mr23330584pfn.59.1566199030844; Mon, 19 Aug 2019 00:17:10 -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 y9sm14691341pfn.152.2019.08.19.00.17.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 19 Aug 2019 00:17:10 -0700 (PDT) From: Hsin-Yi Wang To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v8 3/3] arm64: kexec_file: add rng-seed support Date: Mon, 19 Aug 2019 15:16:06 +0800 Message-Id: <20190819071602.139014-4-hsinyi@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190819071602.139014-1-hsinyi@chromium.org> References: <20190819071602.139014-1-hsinyi@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190819_001711_906228_70ADEE4B X-CRM114-Status: GOOD ( 14.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, 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 Reviewed-by: Stephen Boyd --- No change after v7. --- arch/arm64/kernel/machine_kexec_file.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c index ba78ee7ca990..7b08bf9499b6 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 +104,19 @@ static int setup_dtb(struct kimage *image, FDT_PROP_KASLR_SEED); } + /* add rng-seed */ + if (rng_is_initialized()) { + u8 rng_seed[RNG_SEED_SIZE]; + get_random_bytes(rng_seed, RNG_SEED_SIZE); + ret = fdt_setprop(dtb, off, FDT_PROP_RNG_SEED, rng_seed, + RNG_SEED_SIZE); + 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 +125,8 @@ 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