From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,INCLUDES_PULL_REQUEST,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68FACC433DF for ; Wed, 20 May 2020 21:33:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 234F72084C for ; Wed, 20 May 2020 21:33:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KHuETAs/"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="15GC8tig" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 234F72084C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=vfKPLgbBZdkbgWmtb099JbC3y7iay80eO8QdpP4pqJc=; b=KHu ETAs/TumJB8I3s1gO3cGgGRDu32wvja1aQTfiVWyDSRfPlNwslwj4Ed5rTdy12LF6qzqZDrYCpgsd hNpdUBCSVNh5MPpzlPugCKpdZjrHnAJIeIG2GUZ14ospOnFn5CYJWMjE76slwPS0EsRLCciAXrJxz eCtzXFtlGbdN0EKFKhnFdIbp/KU6a32tjhvJeSD0z3Fle3z4E0naWxoK31rIKhjimYpGUovWY8iQK H8R799skZ1sBJ3hatbZXqwi5ZV5AXc9/Ko1aYfaMAmovXKVR3wmOfmq9hADNyYHxt60Sf57H4qLVP vTM6L9m3dScwKP99qCu0QlyFjbh470w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbWKo-0004GI-P1; Wed, 20 May 2020 21:33:06 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbWKk-0004Fp-DG for linux-arm-kernel@lists.infradead.org; Wed, 20 May 2020 21:33:04 +0000 Received: from e123331-lin.nice.arm.com (amontpellier-657-1-18-247.w109-210.abo.wanadoo.fr [109.210.65.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 82905207F9; Wed, 20 May 2020 21:33:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590010381; bh=lEGVH641CKUJvebvQobI9pOc/m43hhJIu1Jj9AP1Ueg=; h=From:To:Cc:Subject:Date:From; b=15GC8tigoyxpJQpHMpX+pH6fS2ipKa1JQkP+/RHvscumr/tBBl10Vs59ThKeBkIRH GsWyeztMGVgCWtDAI7sK+jNBBFodTohnWrubkM5DCu5/f1HZFODdhztJP2Na7hgOxy 01obYBJgfZgrBbNxzXGEbueZAjTolkEKr5W8HTZw= From: Ard Biesheuvel To: linux-efi@vger.kernel.org Subject: [GIT PULL v2] ARM: simplify handover from UEFI to decompressor Date: Wed, 20 May 2020 23:32:56 +0200 Message-Id: <20200520213256.16004-1-ardb@kernel.org> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200520_143302_467609_0AB1F3FD X-CRM114-Status: GOOD ( 11.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux+pull@armlinux.org.uk, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello Russell, As discussed in the context of Geert's reverted v6 of the DTB memory node discovery patch [0], EFI boot is one possible workaround for systems where the base of memory is not a round multiple of 128 MB. U-boot today supports the bootefi command out of the box, so this does not require any special firmware. So please pull the changes below for v5.8 [0] https://lore.kernel.org/linux-arm-kernel/20200429082120.16259-1-geert+renesas@glider.be/ The following changes since commit a780e485b5768e78aef087502499714901b68cc4: ARM: 8971/1: replace the sole use of a symbol with its definition (2020-04-29 13:30:20 +0100) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git tags/efi-arm-no-relocate-for-rmk for you to fetch changes up to d0f9ca9be11f25ef4151195eab7ea36d136084f6: ARM: decompressor: run decompressor in place if loaded via UEFI (2020-05-19 18:23:22 +0200) ---------------------------------------------------------------- Simplify EFI handover to decompressor The EFI stub in the ARM kernel runs in the context of the firmware, which means it usually runs with the caches and MMU on. Currently, we relocate the zImage so it appears in the first 128 MiB, disable the MMU and caches and invoke the decompressor via its ordinary entry point. However, since we can pass the base of DRAM directly, there is no need to relocate the zImage, which also means there is no need to disable and re-enable the caches and create new page tables etc. This also allows systems whose DRAM start address is not a round multiple of 128 MB to decompress the kernel proper to the base of memory, ensuring that all memory is usable at runtime. ---------------------------------------------------------------- Ard Biesheuvel (5): ARM: decompressor: move headroom variable out of LC0 ARM: decompressor: split off _edata and stack base into separate object ARM: decompressor: defer loading of the contents of the LC0 structure ARM: decompressor: move GOT into .data for EFI enabled builds ARM: decompressor: run decompressor in place if loaded via UEFI arch/arm/boot/compressed/head.S | 79 +++++++++++++------------------ arch/arm/boot/compressed/vmlinux.lds.S | 5 ++ drivers/firmware/efi/libstub/arm32-stub.c | 45 +++--------------- 3 files changed, 43 insertions(+), 86 deletions(-) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel