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 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 659A0C83F25 for ; Tue, 22 Jul 2025 09:32:16 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ue9Kz-0004Rm-K4; Tue, 22 Jul 2025 05:31:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ue9Ku-0004MT-TM; Tue, 22 Jul 2025 05:31:01 -0400 Received: from mail.ozlabs.org ([2404:9400:2221:ea00::3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ue9Ks-0003cX-Bt; Tue, 22 Jul 2025 05:31:00 -0400 Received: from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4bmX4c1JXjz4x6n; Tue, 22 Jul 2025 19:28:16 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4bmX4X3WWyz4wyh; Tue, 22 Jul 2025 19:28:12 +1000 (AEST) Message-ID: <3da6275e-84d4-4911-8df1-6ed35bf63c07@kaod.org> Date: Tue, 22 Jul 2025 11:30:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [SPAM] [PATCH v4 4/5] hw/misc/aspeed_otp: Add 'drive' property to support block backend To: Kane Chen , Peter Maydell , Steven Lee , Troy Lee , Jamin Lin , Andrew Jeffery , Joel Stanley , "open list:ASPEED BMCs" , "open list:All patches CC here" Cc: troy_lee@aspeedtech.com References: <20250708055810.2868680-1-kane_chen@aspeedtech.com> <20250708055810.2868680-5-kane_chen@aspeedtech.com> Content-Language: en-US, fr From: =?UTF-8?Q?C=C3=A9dric_Le_Goater?= Autocrypt: addr=clg@kaod.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2404:9400:2221:ea00::3; envelope-from=SRS0=A8BM=2D=kaod.org=clg@ozlabs.org; helo=mail.ozlabs.org X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.157, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 7/8/25 07:57, Kane Chen wrote: > From: Kane-Chen-AS > > This patch introduces a 'drive' property to the Aspeed OTP device, > allowing it to be backed by a block device. Users can now preload > OTP data via QEMU CLI using a block backend. > > Example usage: > ./qemu-system-arm \ > -blockdev driver=file,filename=otpmem.img,node-name=otp \ > -global aspeed-otp.drive=otp \ > ... > > If the drive is provided, its content will be loaded as the initial OTP state. > Otherwise, an internal memory buffer will be used. > > Signed-off-by: Kane-Chen-AS Reviewed-by: Cédric Le Goater Thanks, C. > --- > hw/nvram/aspeed_otp.c | 16 +++++++++++++++- > 1 file changed, 15 insertions(+), 1 deletion(-) > > diff --git a/hw/nvram/aspeed_otp.c b/hw/nvram/aspeed_otp.c > index e41481d9bb..f018c58713 100644 > --- a/hw/nvram/aspeed_otp.c > +++ b/hw/nvram/aspeed_otp.c > @@ -9,6 +9,7 @@ > #include "qemu/osdep.h" > #include "qemu/log.h" > #include "qapi/error.h" > +#include "system/block-backend-global-state.h" > #include "system/block-backend-io.h" > #include "hw/qdev-properties.h" > #include "hw/nvram/aspeed_otp.h" > @@ -35,13 +36,25 @@ static bool aspeed_otp_init_storage(AspeedOTPState *s, Error **errp) > { > uint32_t *p; > int i, num; > + uint64_t perm; > > + if (s->blk) { > + perm = BLK_PERM_CONSISTENT_READ | > + (blk_supports_write_perm(s->blk) ? BLK_PERM_WRITE : 0); > + if (blk_set_perm(s->blk, perm, BLK_PERM_ALL, errp) < 0) { > + return false; > + } > + if (blk_pread(s->blk, 0, s->size, s->storage, 0) < 0) { > + error_setg(errp, "Failed to read the initial flash content"); > + return false; > + } > + } else { > num = s->size / sizeof(uint32_t); > p = (uint32_t *)s->storage; > for (i = 0; i < num; i++) { > p[i] = (i % 2 == 0) ? 0x00000000 : 0xFFFFFFFF; > } > - > + } > return true; > } > > @@ -75,6 +88,7 @@ static void aspeed_otp_realize(DeviceState *dev, Error **errp) > > static const Property aspeed_otp_properties[] = { > DEFINE_PROP_UINT64("size", AspeedOTPState, size, 0), > + DEFINE_PROP_DRIVE("drive", AspeedOTPState, blk), > }; > > static void aspeed_otp_class_init(ObjectClass *klass, const void *data)