From patchwork Tue Jul 19 12:20:33 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: 12922425 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 C8297C43334 for ; Tue, 19 Jul 2022 12:21:36 +0000 (UTC) Received: from localhost ([::1]:35122 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDmEJ-0007fd-NR for qemu-devel@archiver.kernel.org; Tue, 19 Jul 2022 08:21:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53518) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDmDU-0006vl-8W for qemu-devel@nongnu.org; Tue, 19 Jul 2022 08:20:44 -0400 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]:52006) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDmDS-0003CK-Cc for qemu-devel@nongnu.org; Tue, 19 Jul 2022 08:20:43 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 6533A6158C; Tue, 19 Jul 2022 12:20:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D46D6C341CA; Tue, 19 Jul 2022 12:20:40 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="fbW0uINw" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1658233239; 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=kUxOG0c6xR3PlPaWiKzu4kgsZ22wZWNFEtZFCWtbGvE=; b=fbW0uINw6HLHzKdR3VDlktxp0Gn06LDzCicmiKmsLPVZ6KISRqcK+f7kkJ6JzWO+k9y8Gy raIrwjJm/otg3rHCkFOrhXrkQKAQ0bLukM5ZOArPlVGYlizqG+1L6VV5oyLbJ7DaNXYXvj UJEVuY83fWMJ/p8cyWJLLByT0lgUsQU= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id ead9de90 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO); Tue, 19 Jul 2022 12:20:39 +0000 (UTC) From: "Jason A. Donenfeld" To: qemu-devel@nongnu.org Cc: "Jason A. Donenfeld" , Yoshinori Sato Subject: [PATCH] hw/rx: pass random seed to fdt Date: Tue, 19 Jul 2022 14:20:33 +0200 Message-Id: <20220719122033.135902-1-Jason@zx2c4.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2604:1380:4641:c500::1; envelope-from=SRS0=TnJG=XY=zx2c4.com=Jason@kernel.org; helo=dfw.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: Yoshinori Sato Signed-off-by: Jason A. Donenfeld Reviewed-by: Yoshinori Sato --- hw/rx/rx-gdbsim.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c index be147b4bd9..8ffe1b8035 100644 --- a/hw/rx/rx-gdbsim.c +++ b/hw/rx/rx-gdbsim.c @@ -19,6 +19,7 @@ #include "qemu/osdep.h" #include "qemu/cutils.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "qapi/error.h" #include "hw/loader.h" #include "hw/rx/rx62n.h" @@ -83,6 +84,7 @@ static void rx_gdbsim_init(MachineState *machine) MemoryRegion *sysmem = get_system_memory(); const char *kernel_filename = machine->kernel_filename; const char *dtb_filename = machine->dtb; + uint8_t rng_seed[32]; if (machine->ram_size < mc->default_ram_size) { char *sz = size_to_str(mc->default_ram_size); @@ -140,6 +142,8 @@ static void rx_gdbsim_init(MachineState *machine) error_report("Couldn't set /chosen/bootargs"); exit(1); } + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(dtb, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); /* DTB is located at the end of SDRAM space. */ dtb_offset = ROUND_DOWN(machine->ram_size - dtb_size, 16); rom_add_blob_fixed("dtb", dtb, dtb_size,