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=-8.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0D4ACCA9EC2 for ; Mon, 28 Oct 2019 12:10:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D6EED2086D for ; Mon, 28 Oct 2019 12:10:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="EUBBiGEQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388809AbfJ1MKr (ORCPT ); Mon, 28 Oct 2019 08:10:47 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:50198 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727366AbfJ1MKr (ORCPT ); Mon, 28 Oct 2019 08:10:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=MShXZa1+VfWemaDVKOJsMyrJQ4OJgFXkT9JkKb43G34=; b=EUBBiGEQT7nsI6/gm15moaJb2 NUJvJcfo7UYOtunxVRtAIwwgGvNRCK37G7e5MDlhOu9WpOSCmeWUuMUXnd0Q9aI83Yd6K92ek3pjF 7b7LVUbF8xmjZcG3SZIRy0PpRCb2QbQIjP1LiV3Sw0AEkJONUZswn0oI1EdjMxys/fA/X2/w5YL3P gbOaHCpE3SUbpCXMPcJ/Kd+hpatnUj+1KNnuRqGqABKwm2iSG5tVg6n2rWmcZ6iD9YsCj1vfLJ1p9 cDxRB+ivaS9AAcfXI/zt30NJ9th9Ce9jYA0JR4B7QNHLPBs4JmljJEbhj91f/nPa2C2nLnp3JqdlI uHnnZzFrg==; Received: from [2001:4bb8:18c:c7d:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iP3rB-0006Wo-FH; Mon, 28 Oct 2019 12:10:45 +0000 From: Christoph Hellwig To: Palmer Dabbelt , Paul Walmsley Cc: Damien Le Moal , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: RISC-V nommu support v6 Date: Mon, 28 Oct 2019 13:10:31 +0100 Message-Id: <20191028121043.22934-1-hch@lst.de> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, below is a series to support nommu mode on RISC-V. For now this series just works under qemu with the qemu-virt platform, but Damien has also been able to get kernel based on this tree with additional driver hacks to work on the Kendryte KD210, but that will take a while to cleanup an upstream. A git tree is available here: git://git.infradead.org/users/hch/riscv.git riscv-nommu.6 Gitweb: http://git.infradead.org/users/hch/riscv.git/shortlog/refs/heads/riscv-nommu.6 I've also pushed out a builtroot branch that can build a RISC-V nommu root filesystem here: git://git.infradead.org/users/hch/buildroot.git riscv-nommu.2 Gitweb: http://git.infradead.org/users/hch/buildroot.git/shortlog/refs/heads/riscv-nommu.2 Changes since v5: - rebased to Linux 5.4-rc5 - fix up a newly sneaked in use of ->sepc in the perf callchain code - fix out of tree builds with the generated loader.lds - replace the plic context hack with a cleaner solution Changes since v4: - rebased to 5.4-rc + latest riscv fixes - clean up do_trap_break - fix an SR_XPIE issue (Paul Walmsley) - use the symbolic PAGE_OFFSET value in the flat loader (Aurabindo Jayamohanan) Changes since v3: - improve a few commit message - cleanup riscv_cpuid_to_hartid_mask - cleanup the timer handling - cleanup the IPI handling a little more - renamed CONFIG_M_MODE to CONFIG_RISCV_M_MODE - split out CONFIG_RISCV_SBI to make some of the ifdefs more obbious - use IS_ENABLED wherever possible instead of if ifdefs to make the code more readable Changes since v2: - rebased to 5.3-rc - remove the EFI image header for nommu builds - set ARCH_SLAB_MINALIGN to ensure stack alignment in the flat binary loader - minor comment improvement - use #defines for more CSRs Changes since v1: - fixes so that a kernel with this series still work on builds with an IOMMU - small clint cleanups - the binfmt_flat base and buildroot now don't put arguments on the stack