From patchwork Tue Jul 19 12:23:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 12922426 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3FA08CCA481 for ; Tue, 19 Jul 2022 12:25:26 +0000 (UTC) Received: from localhost ([::1]:38444 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDmI1-0001WC-1v for qemu-devel@archiver.kernel.org; Tue, 19 Jul 2022 08:25:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54000) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDmGN-0000TZ-AY for qemu-devel@nongnu.org; Tue, 19 Jul 2022 08:23:43 -0400 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]:39126) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDmGL-0003Su-I3 for qemu-devel@nongnu.org; Tue, 19 Jul 2022 08:23:42 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A7259B81B08; Tue, 19 Jul 2022 12:23:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09A79C341C6; Tue, 19 Jul 2022 12:23:37 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="IJDVOWmQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1658233416; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=icOQmANJMOOk5qQsrtzMgjZ0MqW0W6Tn2/d4tC4n22M=; b=IJDVOWmQvNw7b3D1qpsm2e5EzTFTi78/N07HilLxZPgE081CwSK+KUacr5ZrFnfSgNmSXR XsJvZhKNvUkZHesmT7NwYzxzP6H4G0NTI0UJxKspfzes61mcWzKfZKT99+tFyaIdlqFem2 LkJ5DUtqV+xOAIA/VrJCr4Rvnm6K8/s= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id d5020878 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO); Tue, 19 Jul 2022 12:23:36 +0000 (UTC) From: "Jason A. Donenfeld" To: qemu-devel@nongnu.org Cc: "Jason A. Donenfeld" , "Edgar E . Iglesias" Subject: [PATCH] hw/microblaze: pass random seed to fdt Date: Tue, 19 Jul 2022 14:23:34 +0200 Message-Id: <20220719122334.136290-1-Jason@zx2c4.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2604:1380:4601:e00::1; envelope-from=SRS0=TnJG=XY=zx2c4.com=Jason@kernel.org; helo=ams.source.kernel.org X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" If the FDT contains /chosen/rng-seed, then the Linux RNG will use it to initialize early. Set this using the usual guest random number generation function. This FDT node is part of the DT specification. Cc: Edgar E. Iglesias Signed-off-by: Jason A. Donenfeld Reviewed-by: Edgar E. Iglesias --- hw/microblaze/boot.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c index 8b92a9801a..25ad54754e 100644 --- a/hw/microblaze/boot.c +++ b/hw/microblaze/boot.c @@ -30,6 +30,7 @@ #include "qemu/option.h" #include "qemu/config-file.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "sysemu/device_tree.h" #include "sysemu/reset.h" #include "hw/boards.h" @@ -75,6 +76,7 @@ static int microblaze_load_dtb(hwaddr addr, int fdt_size; void *fdt = NULL; int r; + uint8_t rng_seed[32]; if (dtb_filename) { fdt = load_device_tree(dtb_filename, &fdt_size); @@ -83,6 +85,9 @@ static int microblaze_load_dtb(hwaddr addr, return 0; } + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); + if (kernel_cmdline) { r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);