From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 03 Nov 2025 09:57:18 +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 1vFqNK-00EnYl-2a for lore@lore.pengutronix.de; Mon, 03 Nov 2025 09:57:18 +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 1vFqNK-0002OO-9Y for lore@pengutronix.de; Mon, 03 Nov 2025 09:57:18 +0100 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:MIME-Version:Date:Message-Id:Subject:References:In-Reply-To:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2SQ9NU5ukMOqlwu0oMOZyCDZXZyXEbdte6Y8yxTkNrU=; b=0pWNVa64UDhMWRYY5gdQWmihOA T1R04Mw0y4+lQarLDvLBVW8IQ31TbhrrRbRZETkbMkE8GVkwrfRy2Gz6m1UxBOh/0ZFoxPoPBb4LF pNPUMLaolUxqGCLvGIIhATRvR7iEksP4VEAc6t8nONC+7pFzy9rT7k3yfDzpW5Zk4GhARDPYri2+v XX6D2PXPuKJ+ku+xNc9Sqfk3hXwT/+XJPQprP+y6cMpf1PJp+ik4kowE86yVRJ/kgvTeJhA0XI0Xr KjsebmihaAHmHe3WQTsOml4pPomT47wWrRyUOF9Mq6iqgIbhFh6w1L06cq9o7G2i5rWajxotEpqHi SeD5OC/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFqMw-00000009TSt-2Ezr; Mon, 03 Nov 2025 08:56:54 +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 1vFqMu-00000009TSP-2acp for barebox@lists.infradead.org; Mon, 03 Nov 2025 08:56:53 +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 1vFqMs-0002JM-R5; Mon, 03 Nov 2025 09:56:50 +0100 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) 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 1vFqMs-006pVE-27; Mon, 03 Nov 2025 09:56:50 +0100 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1vFqMt-0000000HNlY-090B; Mon, 03 Nov 2025 09:56:50 +0100 From: Sascha Hauer To: barebox@lists.infradead.org, Ahmad Fatoum Cc: mfe@pengutronix.de In-Reply-To: <20251028143238.1782982-1-a.fatoum@pengutronix.de> References: <20251028143238.1782982-1-a.fatoum@pengutronix.de> Message-Id: <176216021058.4142877.16070569428789037301.b4-ty@pengutronix.de> Date: Mon, 03 Nov 2025 09:56:50 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251103_005652_660205_A5B9D8DB X-CRM114-Status: UNSURE ( 8.91 ) X-CRM114-Notice: Please train this message. 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.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.1 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 1/2] ARM: mmu: have zero_page_remappable() check MMU status 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) On Tue, 28 Oct 2025 15:32:34 +0100, Ahmad Fatoum wrote: > zero_page_access() and zero_page_faulting() call remap_range(), which > assumes the TTBR was initialized to page tables set up by barebox. > > It's thus not safe to call them from generic code prior to enabling the > MMU, but we are doing just that. In preparation for fixing, let's make > zero_page_remappable reflect MMU status. > > [...] Applied, thanks! [1/2] ARM: mmu: have zero_page_remappable() check MMU status https://git.pengutronix.de/cgit/barebox/commit/?id=ce3410882a3a (link may not be stable) [2/2] ARM: i.MX8M: romapi: skip zero_page_access() if MMU is disabled https://git.pengutronix.de/cgit/barebox/commit/?id=accef8382d96 (link may not be stable) Best regards, -- Sascha Hauer