From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 17 May 2023 17:57:38 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1pzJX1-004TZw-ND for lore@lore.pengutronix.de; Wed, 17 May 2023 17:57:38 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pzJWz-0002hR-Ey for lore@pengutronix.de; Wed, 17 May 2023 17:57:37 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc: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=bB6MklKPH65Yq6OYp99tUBq+pfWkixdGiVQZpVwfEYI=; b=sOA0U/oNLq9sgbl0o8UY/h2pO/ 8tw4/YpvGUXgcR+Hk03n/9CyZPJ3dqia9kVugMgZ0EdfRsaqiABhj1A8YprM1tE8Eoz0wOxXjAEFU 1/UCySdQ2QYrzJ8ZUie+hqFTHHuSooIrtMRIaW94Bn1s9JX2S4KG8mZiYEofa1pqGa+HLAWnhOfGL wIHOgXsX1VgGt0LYIrM95MCwognTmsZ4Ljo/HvnJYPdmspfhHa4denoGYg/vPS5PXPHana9Mi2VV7 1f4OVbX6Bu95uHAY8agV+Zqh4pHFkj9r/+9xWHAo4dzRmlqpnjBKkL88bVHK9jrhkFx7mUuKzaBMx Urrw5wSA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pzJVr-00ANht-1h; Wed, 17 May 2023 15:56:27 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pzJVo-00ANhA-1p for barebox@lists.infradead.org; Wed, 17 May 2023 15:56:25 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1pzJVl-0002dX-Qz; Wed, 17 May 2023 17:56:21 +0200 Message-ID: <3bb1cdac-4cdf-5771-92d7-1a9f7fc9a007@pengutronix.de> Date: Wed, 17 May 2023 17:56:20 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Content-Language: en-US To: Sascha Hauer Cc: Barebox List References: <20230517090340.3954615-1-s.hauer@pengutronix.de> <20230517090340.3954615-34-s.hauer@pengutronix.de> <1caed1b5-108d-7686-4e3b-0fd3bab04a58@pengutronix.de> <20230517145541.GD29365@pengutronix.de> From: Ahmad Fatoum In-Reply-To: <20230517145541.GD29365@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-20230517_085624_608786_7F47BAE9 X-CRM114-Status: GOOD ( 14.57 ) 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: , 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.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.5 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH v2 33/34] ARM: mmu32: Skip reserved ranges during initialization X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) On 17.05.23 16:55, Sascha Hauer wrote: > On Wed, May 17, 2023 at 04:43:39PM +0200, Ahmad Fatoum wrote: >> I am a bit bothered by the asymmetry here: Reserved regions in the extra memory banks >> will be initially uncached (because outside initmem), so this loop does the correct thing. >> >> For reserved regions within the initial memory, only the OP-TEE region would be uncached, >> everything else would just be requested, but is still mapped cacheable. >> >> IMO, that's surprising behavior. > > I agree. What would you suggest. Map all reserved regions uncached? That would be my preference, yes. Then as a future step, we could elect to parse the reserved entries in PBL to be able to handle OP-TEE or whatever even in middle of RAM. Cheers, Ahmad > > Sascha > -- 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 |