From patchwork Wed Feb 9 12:37:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Heiko_St=C3=BCbner?= X-Patchwork-Id: 12740236 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 4B18FC4332F for ; Wed, 9 Feb 2022 12:38:47 +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: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:In-Reply-To:References: List-Owner; bh=a5L3PhdxreQsBYBepq1Gl5kc9ijhkQrL1X7vSW1BP4Y=; b=xwgk8JLY8+x7xN BqmHpasUuPnBcFUAQTHjimri3vxzIV0XXkXy9UQHzk/ZHyXKsN3ZWwVlkXnWLq9msHIGaSfLIEfj2 5bXx3bWrPEdLYyXnfXKXtTPkCH1xS1ulim1IiIQdJ2zwkWK92LBE2Cpf1EaIVh/yZRXpNFYJZlnJK xvVdHpg72V4VT1sElR1imwtOYhr/pdme+ZwTt6nKlhj95uFVU19CtJt4KrgrFF9NZJxF20hSWusjh X9Gk87BDd5g+ef4neYm6RKuV12T+CGAZaUJt6IyTxmtcIcNkuVTrFRP7fbLX7GQzV+JSBW+1f2TIf AOE/S42Eviy2rqdQzNEw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nHmF5-0002Er-PX; Wed, 09 Feb 2022 12:38:39 +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 1nHmEt-00027s-0o for linux-riscv@lists.infradead.org; Wed, 09 Feb 2022 12:38:30 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nHmEi-0001Mv-Cm; Wed, 09 Feb 2022 13:38:16 +0100 From: Heiko Stuebner To: palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu Cc: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, wefu@redhat.com, liush@allwinnertech.com, guoren@kernel.org, atishp@atishpatra.org, anup@brainfault.org, drew@beagleboard.org, hch@lst.de, arnd@arndb.de, wens@csie.org, maxime@cerno.tech, gfavor@ventanamicro.com, andrea.mondelli@huawei.com, behrensj@mit.edu, xinhaoqu@huawei.com, huffman@cadence.com, mick@ics.forth.gr, allen.baum@esperantotech.com, jscheid@ventanamicro.com, rtrauben@gmail.com, samuel@sholland.org, cmuellner@linux.com, philipp.tomsich@vrull.eu, Heiko Stuebner Subject: [PATCH v6 00/14] riscv: support for Svpbmt and D1 memory types Date: Wed, 9 Feb 2022 13:37:46 +0100 Message-Id: <20220209123800.269774-1-heiko@sntech.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220209_043827_138577_6F73EFB3 X-CRM114-Status: GOOD ( 23.12 ) 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: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Svpbmt is an extension defining "Supervisor-mode: page-based memory types" for things like non-cacheable pages or I/O memory pages. So this is my 2nd try at implementing Svpbmt (and the diverging D1 memory types) using the alternatives framework. This includes a number of changes to the alternatives mechanism itself. The biggest one being the move to a more central location, as I expect in the future, nearly every chip needing some sort of patching, be it either for erratas or for optional features (svpbmt or others). The dt-binding for svpbmt itself is of course not finished and is still using the binding introduced in previous versions, as where to put a svpbmt-property in the devicetree is still under dicussion. Atish seems to be working on a framework for extensions [0], The series also introduces support for the memory types of the D1 which are implemented differently to svpbmt. But when patching anyway it's pretty clean to add the D1 variant via ALTERNATIVE_2 to the same location. The only slightly bigger difference is that the "normal" type is not 0 as with svpbmt, so kernel patches for this PMA type need to be applied even before the MMU is brought up, so the series introduces a separate stage for that. In theory this series is 3 parts: - sbi cache-flush / null-ptr - alternatives improvements - svpbmt+d1 So expecially patches from the first 2 areas could be applied when deemed ready, I just thought to keep it together to show-case where the end-goal is and not requiring jumping between different series. The sbi cache-flush patch is based on Atish's sparse-hartid patch [1], as it touches a similar area in mm/cacheflush.c I picked the recipient list from the previous version, hopefully I didn't forget anybody. changes in v6: - rebase onto 5.17-rc1 - handle sbi null-ptr differently - improve commit messages - use riscv,mmu as property name changes in v5: - move to use alternatives for runtime-patching - add D1 variant [0] https://lore.kernel.org/r/20211224211632.1698523-1-atishp@rivosinc.com [1] https://lore.kernel.org/r/20220120090918.2646626-1-atishp@rivosinc.com Heiko Stuebner (12): riscv: prevent null-pointer dereference with sbi_remote_fence_i riscv: integrate alternatives better into the main architecture riscv: allow different stages with alternatives riscv: implement module alternatives riscv: implement ALTERNATIVE_2 macro riscv: extend concatenated alternatives-lines to the same length riscv: prevent compressed instructions in alternatives riscv: move boot alternatives to a slightly earlier position riscv: Fix accessing pfn bits in PTEs for non-32bit variants riscv: add cpufeature handling via alternatives riscv: remove FIXMAP_PAGE_IO and fall back to its default value riscv: add memory-type errata for T-Head Wei Fu (2): dt-bindings: riscv: add MMU Standard Extensions support for Svpbmt riscv: add RISC-V Svpbmt extension support .../devicetree/bindings/riscv/cpus.yaml | 10 ++ arch/riscv/Kconfig.erratas | 29 ++-- arch/riscv/Kconfig.socs | 1 - arch/riscv/Makefile | 2 +- arch/riscv/errata/Makefile | 2 +- arch/riscv/errata/sifive/errata.c | 10 +- arch/riscv/errata/thead/Makefile | 1 + arch/riscv/errata/thead/errata.c | 85 +++++++++++ arch/riscv/include/asm/alternative-macros.h | 114 ++++++++------- arch/riscv/include/asm/alternative.h | 16 ++- arch/riscv/include/asm/errata_list.h | 52 +++++++ arch/riscv/include/asm/fixmap.h | 2 - arch/riscv/include/asm/pgtable-32.h | 17 +++ arch/riscv/include/asm/pgtable-64.h | 79 +++++++++- arch/riscv/include/asm/pgtable-bits.h | 10 -- arch/riscv/include/asm/pgtable.h | 53 +++++-- arch/riscv/include/asm/vendorid_list.h | 1 + arch/riscv/kernel/Makefile | 1 + arch/riscv/{errata => kernel}/alternative.c | 48 ++++++- arch/riscv/kernel/cpufeature.c | 136 +++++++++++++++++- arch/riscv/kernel/head.S | 2 + arch/riscv/kernel/module.c | 29 ++++ arch/riscv/kernel/sbi.c | 10 +- arch/riscv/kernel/smpboot.c | 4 - arch/riscv/kernel/traps.c | 2 +- arch/riscv/mm/init.c | 1 + 26 files changed, 606 insertions(+), 111 deletions(-) create mode 100644 arch/riscv/errata/thead/Makefile create mode 100644 arch/riscv/errata/thead/errata.c rename arch/riscv/{errata => kernel}/alternative.c (59%) Tested-by: Guo Ren