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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 8EFB0C433E0 for ; Tue, 7 Jul 2020 11:49:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A7A4206F6 for ; Tue, 7 Jul 2020 11:49:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594122565; bh=HsLqdAohKiqT7umIeVpFcBHJCRP29j3lOXD0jVG2vMs=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=KI1nCL54ni6AoH+fWFmefEGA/L1CtIkNF0or1n5XRGB1S5e4aRoKwgl/rk4PC6bGl fTWE6DHnvqlQBiQJNnx9UEqjMlSmbH6M+KnF/gYoueM9lkmAmWOV6iv4th4fLpGm8s XJsMasm2p/q0hGgHLxmH4F5oKpJjCDZwLotCCh90= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728430AbgGGLtY (ORCPT ); Tue, 7 Jul 2020 07:49:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:52438 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727116AbgGGLtY (ORCPT ); Tue, 7 Jul 2020 07:49:24 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0E822206DF; Tue, 7 Jul 2020 11:49:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594122563; bh=HsLqdAohKiqT7umIeVpFcBHJCRP29j3lOXD0jVG2vMs=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=NZAo+YhjSP+fOdA4tk5sYKDs87kiGkgUk9icZPb+wAZDGHI9ZVYZEcZD/Lnz9nHQd 3b3zmFjK9AWcRgaNSW9y0xyQEf7YAvJ8Ca1gKkRB9lKVqRA54DW5UCIopV7dyvrSQZ PM6PyfY04RyR6SNRdlvhlvXys18OkoUdP3GNaFqw= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1jsm6D-009jPD-ES; Tue, 07 Jul 2020 12:49:21 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Tue, 07 Jul 2020 12:49:21 +0100 From: Marc Zyngier To: Alexandru Elisei Cc: Catalin Marinas , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Andre Przywara , Christoffer Dall , Dave Martin , Jintack Lim , George Cherian , "Zengtao (B)" , Andrew Scull , Will Deacon , Mark Rutland , James Morse , Julien Thierry , Suzuki K Poulose , kernel-team@android.com Subject: Re: [PATCH v3 00/17] KVM: arm64: Preliminary NV patches In-Reply-To: References: <20200706125425.1671020-1-maz@kernel.org> User-Agent: Roundcube Webmail/1.4.5 Message-ID: <336e9d1e8d2566d131e4326d71ddd161@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: alexandru.elisei@arm.com, catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, andre.przywara@arm.com, christoffer.dall@arm.com, Dave.Martin@arm.com, jintack@cs.columbia.edu, gcherian@marvell.com, prime.zeng@hisilicon.com, ascull@google.com, will@kernel.org, mark.rutland@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2020-07-07 12:24, Alexandru Elisei wrote: > 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? You need the slightly amended version (kvm-arm6/el2-obj-v4.1 from my tree). Otherwise, just pick kvmarm/next, which has everything put together in one scary lot. Thanks, M. -- Jazz is not dead. It just smells funny...