From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 22 Jan 2026 15:18:41 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vivWD-0049Lm-2D for lore@lore.pengutronix.de; Thu, 22 Jan 2026 15:18:41 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vivWC-0003GR-JN for lore@pengutronix.de; Thu, 22 Jan 2026 15:18:41 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:Content-Type:In-Reply-To:From:References:To:Subject :MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zdBC5FkFAtAaGYElRVcGxji9P8I2Ln08fTZICmgk6Bw=; b=XIXBz8Wez4VrwE vrrpeUMbjv7Qszeq9M1BJiSOD+MW/V1MsMz8lX0iJH0vYD6jnkX4AfEab4tPdxQcGw++AvZWpH745 JvWLMAwdQp4J51cQneypQhvQavEb8s9mUgHZGmOsVAcFpSob30IgH7E54s1gmqjClEPzi/xn5Po+2 dy0/DIjLy+M9dgXYmf3EouCMp4eeKYTdy/XTI7i+PszqDnWwdibWJv2R7j5l5ukW8W8tS6TVKP098 LbFMph+h8hTzc71h8V+OL0LT4uMJVFWq/VCM6+iadvI+zR3KM98pcVF8xCKMccxkxjdiLwLoBO82N /6UpmPLT9RKJo5X4c+Fg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vivVl-00000007Dtm-3QvD; Thu, 22 Jan 2026 14:18:13 +0000 Received: from metis.whiteo.stw.pengutronix.de ([185.203.201.7]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vivVh-00000007Dt3-2hKE for barebox@lists.infradead.org; Thu, 22 Jan 2026 14:18:12 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1vivVg-000390-1z; Thu, 22 Jan 2026 15:18:08 +0100 Message-ID: <19c6a860-0ca2-402d-9277-940d81e879b0@pengutronix.de> Date: Thu, 22 Jan 2026 15:18:07 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Marco Felsch References: <20251110-v2025-09-0-topic-optee-of-handling-v1-0-8f0625ac5471@pengutronix.de> <20251110-v2025-09-0-topic-optee-of-handling-v1-14-8f0625ac5471@pengutronix.de> <67f78008-804b-4732-bd94-2b2b7bda5ec8@pengutronix.de> <20260118182737.bjdtfiqxvwsr3cbc@pengutronix.de> Content-Language: en-US, de-DE, de-BE From: Ahmad Fatoum In-Reply-To: <20260118182737.bjdtfiqxvwsr3cbc@pengutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260122_061809_685702_6BB04689 X-CRM114-Status: GOOD ( 29.60 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: BAREBOX Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.0 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH 14/23] ARM: i.MX: scratch: add OP-TEE FDTO support X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Hello Marco, On 1/18/26 7:27 PM, Marco Felsch wrote: > Hi Ahmad, > > On 26-01-15, Ahmad Fatoum wrote: >> Hello Marco, >> >> On 11/10/25 9:34 PM, Marco Felsch wrote: >>> OP-TEE has the support to write DTB overlay fragments if enabled via >>> OP-TEE config switch CFG_EXTERNAL_DTB_OVERLAY. >>> >>> The overlay fragments are added to the exisiting DTB if OP-TEE was >>> started with a DTB provided via arg2 or written to a stand-alone DTB >>> overlay. >>> >>> This adds a dedicated storage slot which can be passed to OP-TEE or be >>> used by barebox to extract the added overlay fragment into it. >>> >>> Signed-off-by: Marco Felsch >>> --- >> >> >>> +config SCRATCH_FDTO_SIZE >>> + hex >>> + default 0x0 >>> + default 0x4000 if PBL_EARLY_FDT_LOAD >>> + prompt "Scratch FDTO size" >>> + help >>> + The size of possible FDT overlay areas used by BL3x binaries to store >>> + runtime generated overlays. Can be 0x0 if early FDT support is not >>> + requied e.g. during BL31 and BL32 stage. >> >> I understand the need, but I dislike that we add such fine-grained >> Kconfig symbols here. With Sascha's series to make barebox proper an >> ELF, PBL will have more insight about how much space barebox proper >> occupies and I intend to send a series after it to allow easier >> allocation for hand-off data. > > Don't get me wrong I don't like it either. To be honest, I really > don't like the current firmware handling since it doesn't scale for > multi-images. > >> I will include provisions for passing around the device tree and an >> overlay with that series, so please hold off sending your v2 until then. > > This series is on the list since quite a while. Unfortunately I didn't > had the time to ping the ML since I was busy with other projects and > also tried in the mean time to get the missing OP-TEE part mainline. > > However, I would like to get this mainline. Not sure how Sascha is going > to pick the patchsets but for the purpose of converting behaviours I > used a generic name like SCRATCH_FDTO_SIZE, instead of going the > Rockchip way which defined a Rockchip specific variable (unfortunately). > > However, I would like to get this series mainline ASAP since my customer > is going to rely on the mechanism we implemented here. Furthermore it > improves the situation for i.MX6/i.MX7 by a lot (with Fabians patchset). Ack. I am fine with some improvement as long it doesn't break API as discussed before. Cheers, Ahmad > > Regards, > Marco > > >> >> Thanks, >> Ahmad >> >> >>> + >>> config MALLOC_ALIGNMENT >>> hex >>> default 8 >>> diff --git a/include/mach/imx/scratch.h b/include/mach/imx/scratch.h >>> index 43bf55de48099f1662cd4331620a93303d4dd710..a9745a95732dd961dcae83ec46c3eaa078d62a16 100644 >>> --- a/include/mach/imx/scratch.h >>> +++ b/include/mach/imx/scratch.h >>> @@ -15,6 +15,7 @@ const struct optee_header *imx_scratch_get_optee_hdr(void); >>> void imx_scratch_save_optee_hdr(const struct optee_header *hdr); >>> >>> void imx_scratch_get_fdt(void **fdt, unsigned int *fdt_sz); >>> +void imx_scratch_get_optee_fdto(void **fdto, unsigned int *fdto_sz); >>> >>> #define imx8mq_init_scratch_space() imx8m_init_scratch_space(32, true) >>> #define imx8mm_init_scratch_space() imx8m_init_scratch_space(32, true) >>> >> >> -- >> Pengutronix e.K. | | >> Steuerwalder Str. 21 | http://www.pengutronix.de/ | >> 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | >> Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | >> >> > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |