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=-8.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 B17F7ECE58E for ; Thu, 17 Oct 2019 17:37:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C00D21835 for ; Thu, 17 Oct 2019 17:37:49 +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="KYnHXZAK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440678AbfJQRhs (ORCPT ); Thu, 17 Oct 2019 13:37:48 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:34400 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2436664AbfJQRhr (ORCPT ); Thu, 17 Oct 2019 13:37:47 -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=Rk6dzMYH9N8C7Ai+Ydb6Qx7fh86MnYyKaaYlbtkOR7E=; b=KYnHXZAK2km2GA/S7qv97Q+Ht ZcJKxn+cc6M3skxzzrAJ5+1XBkG3Fji1AERJ/6GofyxB7Z0fnlUNbWDkZlMfs5VZEf0eWVqWmpJTw zLMmvj5icT7we8Qwy3ItQ6RcTnKY7ztwG2pHtWSiQdPxjeN+v1IwIWEMdxM7JmE3kPA76cbzBdKbI pxNUAFHL64DN7GaudqFSN06txJJh+GeR05zuhjhtEnl1u20Lgn57VplrQY9xKkSYJszHf2uXyukxd VDi0WuF6JT11lBz+sP26Xqf64uEhGTTdFadWxz3u4DdxaXBkvMOnD2mLAA4UbK1xjq2bFF1Hhh7k/ nM7SoVGug==; Received: from [2001:4bb8:18c:d7b:c70:4a89:bc61:3] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iL9ib-0007FG-Do; Thu, 17 Oct 2019 17:37:46 +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 v5 Date: Thu, 17 Oct 2019 19:37:28 +0200 Message-Id: <20191017173743.5430-1-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.5 Gitweb: http://git.infradead.org/users/hch/riscv.git/shortlog/refs/heads/riscv-nommu.5 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 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