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 BA718C00A5A for ; Thu, 19 Jan 2023 17:25:58 +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: Subject:Cc:To:From:Message-ID:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wpto2WalLvW+jCOyeBULIdGw/0ukfelDssbRsTUo6ro=; b=WaYBRAzxtJKnqo C/Ty6ONNwjEAZ3xcLb93GpID6T2MhErcQInbQ0Na++hP2ECGmofqTcQRi4k6693xkxClhwUT/HQyG +6iWL6981OZlmYuCVG8P1EogFhv7uM3b3eA87cWJ6obdNH7zEzQ6NSwi2CIplXt2KrP9UCiP3p9cR dlo4STd09aJgr27HIz0vSC2I8KguAWq943Y7Ro8v1EQ+RVJ6s8/PZ8mbFKPqmcaBlFkpLcGqOqT6q 0J3yXy8kkm+lGc0+8m8tyxoiS55ax/8grltnuwZNxhyQKq6ximzooZujsMk9PbRjY2NDYRD6cFUkF GltLfWAabOGqypVSkoXw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIYeR-006FUz-2M; Thu, 19 Jan 2023 17:24:35 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIYeL-006FS5-SX; Thu, 19 Jan 2023 17:24:31 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 660916134C; Thu, 19 Jan 2023 17:24:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0EE7C433EF; Thu, 19 Jan 2023 17:24:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674149068; bh=esmAuiMb4cE5hZfqa2pdZ4JKU4zWFBBvjoAoXwc+zAk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=FItgwmM67QScUUENZ8Zwtagr5mIdG5cEHxPFfSNuC1jM6dBrsQGhnCtdKL1v4Yf0w dW3PN2nS8nWYwK6BvAjRYCRs1jNPqcxP6UwIOvTzzQ9T/wZ6VcEzgDHqur2z3W0vff Q1U6HgQ7VMeTq9MX32okWCpOlh8xJ8QfczraVmhyB125dZQ7bsUFjHD48Lr2RB1Xwn dCD05u76MAQiAcbWsup1KSQa2MZ/UMnuWZVUxW8VbUZw7v99qBSmYLqsbt+GBlaRNB uIlEinXfjpAehqjV461mc7XifGdWsWw6VTkhkWgCHrf79SoBq2+sYdBD1CdMnGEwy+ 8vQzGzULTP5uQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pIYeI-003A4j-5l; Thu, 19 Jan 2023 17:24:26 +0000 Date: Thu, 19 Jan 2023 17:24:25 +0000 Message-ID: <86tu0mmo8m.wl-maz@kernel.org> From: Marc Zyngier To: David Matlack Cc: Paolo Bonzini , James Morse , Alexandru Elisei , Suzuki K Poulose , Oliver Upton , Huacai Chen , Aleksandar Markovic , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , Andrew Morton , Anshuman Khandual , Nadav Amit , "Matthew Wilcox (Oracle)" , Vlastimil Babka , "Liam R. Howlett" , Suren Baghdasaryan , Peter Xu , xu xin , Arnd Bergmann , Yu Zhao , Colin Cross , Hugh Dickins , Ben Gardon , Mingwei Zhang , Krish Sadhukhan , Ricardo Koller , Jing Zhang , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, Alexandre Ghiti , Raghavendra Rao Ananta Subject: Re: [RFC PATCH 00/37] KVM: Refactor the KVM/x86 TDP MMU into common code In-Reply-To: References: <20221208193857.4090582-1-dmatlack@google.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/28.2 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: dmatlack@google.com, pbonzini@redhat.com, james.morse@arm.com, alexandru.elisei@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, chenhuacai@kernel.org, aleksandar.qemu.devel@gmail.com, anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, seanjc@google.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, namit@vmware.com, willy@infradead.org, vbabka@suse.cz, Liam.Howlett@oracle.com, surenb@google.com, peterx@redhat.com, cgel.zte@gmail.com, arnd@arndb.de, yuzhao@google.com, ccross@google.com, hughd@google.com, bgardon@google.com, mizhang@google.com, krish.sadhukhan@oracle.com, ricarkol@google.com, jingzhangos@google.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, alexghiti@rivosinc.com, rananta@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230119_092430_047662_F0532ED4 X-CRM114-Status: GOOD ( 19.59 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 19 Jan 2023 17:14:34 +0000, David Matlack wrote: > > On Thu, Dec 08, 2022 at 11:38:20AM -0800, David Matlack wrote: > > > > Hello, > > > > This series refactors the KVM/x86 "TDP MMU" into common code. This is > > the first step toward sharing TDP (aka Stage-2) page table management > > code across architectures that support KVM. > > Thank you everyone for the feedback on this RFC. I have a couple of > updates to share and a question at the end. > > First, Alexandre Ghiti from Rivos is going to work on the RISC-V port. > I'd like to target RISC-V first, since it has significantly lower risk > and complexity than e.g. ARM (which has pKVM, stage-1 walkers, and > [soon] nested virtualization to deal with). And (joy, happiness), the upcoming 128bit page table support[1]. M. [1] https://developer.arm.com/documentation/ddi0601/2022-12/AArch64-Registers/TTBR0-EL1--Translation-Table-Base-Register-0--EL1-?lang=en -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel