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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 995B2C433DF for ; Tue, 7 Jul 2020 11:26:05 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 6467320702 for ; Tue, 7 Jul 2020 11:26:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="nFXa18gY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6467320702 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+P/tTGUBFw/B0VXUeqSqeKD8jhjnSrByAqE44zT91WY=; b=nFXa18gYqczY3CQrSOPDKXE8Z jVRDBrx4Tf4x2paBIUqmCUqDEZZchC2lNiH5Omeqo8U1wv5eItQbks6KASGN9I6mbgbj94cgpIA4a dk2r1AGO7iAzL2HH3naEYwAYtOu4SvDNDiyvXcrbokU70WsVA5wM84tW9ERO6d/Bppop5kURs69LL ZCD0gBDuxmWl+4vAN4UAYlRxBJ85RWleJBLhr4vR5/hJ0Idh/21Pegqls0kx2Z17O78YmLDzf8dY6 Ha/hfdqxXeLZ4P5qSBS/n/DtViregxR0AA+JvcitUextiX7hOwG7+DpOCGY/ggw8wd3KjPHxXOO7I MFvdZnezg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jsliJ-0004GH-F2; Tue, 07 Jul 2020 11:24:39 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jsliG-0004Ft-F4 for linux-arm-kernel@lists.infradead.org; Tue, 07 Jul 2020 11:24:37 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 503631FB; Tue, 7 Jul 2020 04:24:24 -0700 (PDT) Received: from [192.168.0.110] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2B04C3F71E; Tue, 7 Jul 2020 04:24:22 -0700 (PDT) Subject: Re: [PATCH v3 00/17] KVM: arm64: Preliminary NV patches To: Marc Zyngier , Catalin Marinas , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org References: <20200706125425.1671020-1-maz@kernel.org> From: Alexandru Elisei Message-ID: Date: Tue, 7 Jul 2020 12:24:28 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200706125425.1671020-1-maz@kernel.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200707_072436_629195_8FC985AC X-CRM114-Status: GOOD ( 28.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , kernel-team@android.com, Suzuki K Poulose , Andre Przywara , Christoffer Dall , Dave Martin , George Cherian , James Morse , Andrew Scull , "Zengtao \(B\)" , Will Deacon , Jintack Lim , Julien Thierry 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 Hi, On 7/6/20 1:54 PM, Marc Zyngier wrote: > Hi all, > > In order not to repeat the 90+ patch series that resulted in a > deafening silence last time, I've extracted a smaller set of patches > that form the required dependencies that allow the rest of the 65 NV > patches to be added on top. Yes, it is that bad. > > The one real feature here is support for the ARMv8.4-TTL extension at > Stage-2 only. The reason to support it is that it helps the hypervisor > a lot when it comes to finding out how much to invalidate. It is thus > always "supported" with NV. > > The rest doesn't contain any functionality change. Most of it reworks > existing data structures and adds new accessors for the things that > get moved around. The reason for this is that: > > - With NV, we end-up with multiple Stage-2 MMU contexts per VM instead > of a single one. This requires we divorce struct kvm from the S2 MMU > configuration. Of course, we stick with a single MMU context for now. > > - With ARMv8.4-NV, a number of system register accesses are turned > into memory accesses into the so-called VNCR page. It is thus > convenient to make this VNCR page part of the vcpu context and avoid > copying data back and forth. For this to work, we need to make sure > that all the VNCR-aware sysregs are moved into our per-vcpu sys_regs > array instead of leaving in other data structures (the timers, for > example). The VNCR page itself isn't introduced with these patches. > > - As some of these data structures change, we need a way to isolate > the userspace ABI from such change. > > There is also a number of cleanups that were in the full fat series > that I decided to move early to get them out of the way. > > The whole this is a bit of a mix of vaguely unrelated "stuff", but it > all comes together if you look at the final series. This applies on > top of David Brazdil's series splitting the VHE and nVHE objects. > > I plan on taking this early into v5.9, and I really mean it this time! > > Catalin: How do you want to proceed for patches 2, 3, and 4? I could > make a stable branch that gets you pull into the arm64 tree, or the > other way around. Just let me know. > > Thanks, > > M. > > * From v2: > - Rebased on top of David's el2-obj series I tried to apply the patches on top of v5.8-rc1, but I get a conflict on the very first patch. I guess it's because I don't have the el2-obj series. Is that v4 of "Split off nVHE hyp code" patches from David Brazil? Thanks, Alex _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel