From patchwork Sun Jun 7 07:59:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Ghiti X-Patchwork-Id: 11591493 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C59FB739 for ; Sun, 7 Jun 2020 08:00:12 +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 9721420663 for ; Sun, 7 Jun 2020 08:00:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KdjOEIh+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9721420663 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ghiti.fr Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.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:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject:To:From: 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-Owner; bh=u3PAf9XxE84juVjJE7JO3JV9EhJ5dIdUFg4I07nft+g=; b=KdjOEIh+pgOKv5 i6cfPNsqfhl4Ek0AkTusaCpLJHyXilMBxlGpc7+WfTKCRL+lsdjY43oScXgnuHGLx4dSq4kWpVg7k XIbqVBo87UWaNZdxC/awlNu6sF1uFstOa8uv7ySjVoOFWvSgXmjtlgKISShPw5W39ZyKRFJDgf2sj m5nv7dcz6jETtq1lLmHTkRWX4q4w47EDzoRuiDMRY8TZgAVhK/n45UbvH4kj4jrMh4CtPx5NFvTj9 ozm5RLgXD0Rk5yKQxDV9j/7O4dfH64Wtm1PPEfXVm26QVTP2A00WVaiOgSuWsDBA9t1sjX5GDbwIl qZ1s/Nj+5c9e2rUZqnOQ==; 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 1jhqDw-0002sM-9U; Sun, 07 Jun 2020 08:00:08 +0000 Received: from relay10.mail.gandi.net ([217.70.178.230]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jhqDt-0001N0-DV for linux-riscv@lists.infradead.org; Sun, 07 Jun 2020 08:00:07 +0000 Received: from localhost.localdomain (lfbn-gre-1-325-105.w90-112.abo.wanadoo.fr [90.112.45.105]) (Authenticated sender: alex@ghiti.fr) by relay10.mail.gandi.net (Postfix) with ESMTPSA id A5B6B240003; Sun, 7 Jun 2020 07:59:50 +0000 (UTC) From: Alexandre Ghiti To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Atish Patra , Zong Li , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org Subject: [PATCH v5 0/4] vmalloc kernel mapping and relocatable kernel Date: Sun, 7 Jun 2020 03:59:45 -0400 Message-Id: <20200607075949.665-1-alex@ghiti.fr> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200607_010005_742842_A1570A47 X-CRM114-Status: GOOD ( 11.17 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [217.70.178.230 listed in wl.mailspike.net] -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [217.70.178.230 listed in list.dnswl.org] 0.0 SPF_NONE SPF: sender does not publish an SPF Record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexandre Ghiti Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org This patchset originally implemented relocatable kernel support but now also moves the kernel mapping into the vmalloc zone. The first patch explains why we need to move the kernel into vmalloc zone (instead of memcpying it around). That patch should ease KASLR implementation a lot. The second patch allows to build relocatable kernels but is not selected by default. The third and fourth patches take advantage of an already existing powerpc script that checks relocations at compile-time, and uses it for riscv. Changes in v5: * Add "static __init" to create_kernel_page_table function as reported by Kbuild test robot * Add reviewed-by from Zong * Rebase onto v5.7 Changes in v4: * Fix BPF region that overlapped with kernel's as suggested by Zong * Fix end of module region that could be larger than 2GB as suggested by Zong * Fix the size of the vm area reserved for the kernel as we could lose PMD_SIZE if the size was already aligned on PMD_SIZE * Split compile time relocations check patch into 2 patches as suggested by Anup * Applied Reviewed-by from Zong and Anup Changes in v3: * Move kernel mapping to vmalloc Changes in v2: * Make RELOCATABLE depend on MMU as suggested by Anup * Rename kernel_load_addr into kernel_virt_addr as suggested by Anup * Use __pa_symbol instead of __pa, as suggested by Zong * Rebased on top of v5.6-rc3 * Tested with sv48 patchset * Add Reviewed/Tested-by from Zong and Anup Alexandre Ghiti (4): riscv: Move kernel mapping to vmalloc zone riscv: Introduce CONFIG_RELOCATABLE powerpc: Move script to check relocations at compile time in scripts/ riscv: Check relocations at compile time arch/powerpc/tools/relocs_check.sh | 18 +---- arch/riscv/Kconfig | 12 +++ arch/riscv/Makefile | 5 +- arch/riscv/Makefile.postlink | 36 +++++++++ arch/riscv/boot/loader.lds.S | 3 +- arch/riscv/include/asm/page.h | 10 ++- arch/riscv/include/asm/pgtable.h | 38 ++++++--- arch/riscv/kernel/head.S | 3 +- arch/riscv/kernel/module.c | 4 +- arch/riscv/kernel/vmlinux.lds.S | 9 ++- arch/riscv/mm/Makefile | 4 + arch/riscv/mm/init.c | 121 +++++++++++++++++++++++++---- arch/riscv/mm/physaddr.c | 2 +- arch/riscv/tools/relocs_check.sh | 26 +++++++ scripts/relocs_check.sh | 20 +++++ 15 files changed, 259 insertions(+), 52 deletions(-) create mode 100644 arch/riscv/Makefile.postlink create mode 100755 arch/riscv/tools/relocs_check.sh create mode 100755 scripts/relocs_check.sh