From patchwork Mon Jul 24 10:14:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 13324235 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 AE854C001DE for ; Mon, 24 Jul 2023 10:15:26 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.568690.888443 (Exim 4.92) (envelope-from ) id 1qNsam-0005S3-M0; Mon, 24 Jul 2023 10:15:04 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 568690.888443; Mon, 24 Jul 2023 10:15:04 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qNsam-0005Rw-Iz; Mon, 24 Jul 2023 10:15:04 +0000 Received: by outflank-mailman (input) for mailman id 568690; Mon, 24 Jul 2023 10:15:03 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qNsal-0005Rq-IU for xen-devel@lists.xenproject.org; Mon, 24 Jul 2023 10:15:03 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qNsal-0004xf-1Q; Mon, 24 Jul 2023 10:15:03 +0000 Received: from 54-240-197-232.amazon.com ([54.240.197.232] helo=dev-dsk-jgrall-1b-035652ec.eu-west-1.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1qNsak-00020c-Mp; Mon, 24 Jul 2023 10:15:02 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date: Subject:Cc:To:From; bh=hCg9UPO+iJ8A9P2inWazj1KBsCeHxGmLi7g4EiwiQ6E=; b=VRyjB7 F/mUUH3bgKVaTO54zMaH25w54ePycYK8ojYjzgRWM5eMqtc4ODSwEIALDqDqjcUZNgafMEqWb1UAG ZtYd3b6njpN4aweqNrCm+o577TnWB2fO013HG3cz8fkn9IYkT7pUEm6JRYyIn+6nspQUo4ePqDKZO m1BRFOQ5BlM=; From: Julien Grall To: xen-devel@lists.xenproject.org Cc: Luca.Fancellu@arm.com, michal.orzel@amd.com, Henry.Wang@arm.com, Julien Grall , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk Subject: [PATCH v2] xen/arm32: head: Widen the use of the temporary mapping Date: Mon, 24 Jul 2023 11:14:58 +0100 Message-Id: <20230724101458.79412-1-julien@xen.org> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 From: Julien Grall At the moment, the temporary mapping is only used when the virtual runtime region of Xen is clashing with the physical region. In follow-up patches, we will rework how secondary CPU bring-up works and it will be convenient to use the fixmap area for accessing the root page-table (it is per-cpu). Rework the code to use temporary mapping when the Xen physical address is not overlapping with the temporary mapping. This also has the advantage to simplify the logic to identity map Xen. Signed-off-by: Julien Grall ---- This patch was originally part of [1] but it was reverted due to Xen not booting on the Arndale. The second patch of this series is fixing it (confirmed by booting on the Arndale). So I am including this patch. [1] https://lore.kernel.org/xen-devel/20230416143211.72227-1-julien@xen.org/ Changes in new v2: - Rebase - Drop reviewed-by tags Changelog from the previous series: Changes in v6: - Add Henry's reviewed-by and tested-by tag - Add Michal's reviewed-by - Add newline in remove_identity_mapping for clarity Changes in v5: - Fix typo in a comment - No need to link boot_{second, third}_id again if we need to create a temporary area. Changes in v3: - Resolve conflicts after switching from "ldr rX,