From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Sun, 18 Jan 2026 19:28:11 +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 1vhXVT-002l6f-1S for lore@lore.pengutronix.de; Sun, 18 Jan 2026 19:28:11 +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 1vhXVS-0003uE-Bi for lore@pengutronix.de; Sun, 18 Jan 2026 19:28:10 +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:In-Reply-To: Content-Type:MIME-Version:References:Message-ID:Subject:To:From:Date:Reply-To :Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=M2DT9UQv6ycMfdYsyMA37GbDELzbZKWvaX34+lL7iO4=; b=3SfuzKKfdYou7MMC8lWjU5xUrD xVYzB8BIrSqfW0v8a9aPx28qJ60dLkNmnG8Hs5Gko9A+0siT8mGF8p8u5ShXEE1OG9i4jaCk/Hadp 6O2XPMeEChvZe3TJ/Al5mfwK+5w/oSL0N3Higcu0BqflSpIVWMC/J+slIq2GA9nnL/begfo3ebcVT IFW3JLBVDQepzSQLXiqaJlFDea3Ao9hOiktoblNgO8Ph17NYHEIhkLSCqRmnCrtMTdQGHyv4HhlvZ F02BVk22lxB3scp1St1e8+VGRLsgI/L9K8GtmKp1lEsCtDxJpWZ72nn5dXet7sPiVXjxmMr9yxS5l w9Ym+wCg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhXV1-00000000j5B-0Hfo; Sun, 18 Jan 2026 18:27:43 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhXUx-00000000j3n-3V3H for barebox@lists.infradead.org; Sun, 18 Jan 2026 18:27:41 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vhXUw-0003pR-51; Sun, 18 Jan 2026 19:27:38 +0100 Received: from pty.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::c5]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vhXUw-001Hix-24; Sun, 18 Jan 2026 19:27:37 +0100 Received: from mfe by pty.whiteo.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1vhXUv-001bp9-2l; Sun, 18 Jan 2026 19:27:37 +0100 Date: Sun, 18 Jan 2026 19:27:37 +0100 From: Marco Felsch To: Ahmad Fatoum Message-ID: <20260118182737.bjdtfiqxvwsr3cbc@pengutronix.de> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <67f78008-804b-4732-bd94-2b2b7bda5ec8@pengutronix.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260118_102739_871856_EB6FD7A1 X-CRM114-Status: GOOD ( 32.53 ) 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) 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). 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 | > > -- #gernperDu #CallMeByMyFirstName Pengutronix e.K. | | Steuerwalder Str. 21 | https://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |