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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 46273C433F5 for ; Wed, 24 Nov 2021 23:29:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=hujoJ9EecCwTPjAx5tpVsC6ctjan6I7sojVLu+wc4Pc=; b=DyGewbsaZf3hJR U8OoO7kHpTOYaVtCjAmuEaGwXdLamgdVhZwzXQrk0xDrOD1B76Plf8KxO1tSVihRYYg53G0XbCgC4 0kbDWTF7mVbM6vJlJyfPEsjOMDdDdnN1X6ICL82HKvL6uvOQ+ALwLPLdA8+v5rOrrSMIUP/KNXCbf +5B2NCZX7XKn+zjizNMQjR6GEkreqgamFZ7Tvk31akJRCMYPQB/EWQffnTFVTBSO02/K9cJMawdF3 0Y4KWYsB/LCyaBrdVtcInYOSxuR6xQImibj01JKQNz7jt0lt3aPWbHdtYDcDtGeuxBpPhLgmONSyk S8aJd/RwGvFhe+jTjNNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mq1hq-0064p0-3F; Wed, 24 Nov 2021 23:29:38 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mq1hn-0064oQ-NZ for linux-riscv@lists.infradead.org; Wed, 24 Nov 2021 23:29:37 +0000 Received: from ip5f5b2004.dynamic.kabel-deutschland.de ([95.91.32.4] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mq1ha-0000eP-BH; Thu, 25 Nov 2021 00:29:22 +0100 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Jonathan Corbet , Paul Walmsley , Palmer Dabbelt , Albert Ou , Zong Li , Anup Patel , Atish Patra , Christoph Hellwig , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Ard Biesheuvel , Arnd Bergmann , Kees Cook , Guo Ren , Heinrich Schuchardt , Mayuresh Chitale , linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-efi@vger.kernel.org, linux-arch@vger.kernel.org, Alexandre Ghiti Cc: Alexandre Ghiti Subject: Re: [PATCH v2 00/10] Introduce sv48 support without relocatable kernel Date: Thu, 25 Nov 2021 00:29:20 +0100 Message-ID: <2700575.YIZvDWadBg@diego> In-Reply-To: <20210929145113.1935778-1-alexandre.ghiti@canonical.com> References: <20210929145113.1935778-1-alexandre.ghiti@canonical.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211124_152935_828014_DF239F79 X-CRM114-Status: GOOD ( 24.04 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Am Mittwoch, 29. September 2021, 16:51:03 CET schrieb Alexandre Ghiti: > This patchset allows to have a single kernel for sv39 and sv48 without > being relocatable. > > The idea comes from Arnd Bergmann who suggested to do the same as x86, > that is mapping the kernel to the end of the address space, which allows > the kernel to be linked at the same address for both sv39 and sv48 and > then does not require to be relocated at runtime. > > This implements sv48 support at runtime. The kernel will try to > boot with 4-level page table and will fallback to 3-level if the HW does not > support it. Folding the 4th level into a 3-level page table has almost no > cost at runtime. > > Tested on: > - qemu rv64 sv39: OK > - qemu rv64 sv48: OK > - qemu rv64 sv39 + kasan: OK > - qemu rv64 sv48 + kasan: OK > - qemu rv32: OK > - Unmatched: OK On a beagleV (which supports only sv39) I've tested both the limit via the mmu-type in the devicetree and also that the fallback works when I disable the mmu-type in the dt, so Tested-by: Heiko Stuebner > > > Changes in v2: > - Rebase onto for-next > - Fix KASAN > - Fix stack canary > - Get completely rid of MAXPHYSMEM configs > - Add documentation > > Alexandre Ghiti (10): > riscv: Allow to dynamically define VA_BITS > riscv: Get rid of MAXPHYSMEM configs > asm-generic: Prepare for riscv use of pud_alloc_one and pud_free > riscv: Implement sv48 support > riscv: Use pgtable_l4_enabled to output mmu_type in cpuinfo > riscv: Explicit comment about user virtual address space size > riscv: Improve virtual kernel memory layout dump > Documentation: riscv: Add sv48 description to VM layout > riscv: Initialize thread pointer before calling C functions > riscv: Allow user to downgrade to sv39 when hw supports sv48 > > Documentation/riscv/vm-layout.rst | 36 ++ > arch/riscv/Kconfig | 35 +- > arch/riscv/configs/nommu_k210_defconfig | 1 - > .../riscv/configs/nommu_k210_sdcard_defconfig | 1 - > arch/riscv/configs/nommu_virt_defconfig | 1 - > arch/riscv/include/asm/csr.h | 3 +- > arch/riscv/include/asm/fixmap.h | 1 + > arch/riscv/include/asm/kasan.h | 2 +- > arch/riscv/include/asm/page.h | 10 + > arch/riscv/include/asm/pgalloc.h | 40 +++ > arch/riscv/include/asm/pgtable-64.h | 108 +++++- > arch/riscv/include/asm/pgtable.h | 30 +- > arch/riscv/include/asm/sparsemem.h | 6 +- > arch/riscv/kernel/cpu.c | 23 +- > arch/riscv/kernel/head.S | 4 +- > arch/riscv/mm/context.c | 4 +- > arch/riscv/mm/init.c | 323 +++++++++++++++--- > arch/riscv/mm/kasan_init.c | 91 +++-- > drivers/firmware/efi/libstub/efi-stub.c | 2 + > include/asm-generic/pgalloc.h | 24 +- > include/linux/sizes.h | 1 + > 21 files changed, 615 insertions(+), 131 deletions(-) > > _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv