Received: by 2002:a05:6a10:16a7:0:0:0:0 with SMTP id gp39csp3877433pxb; Tue, 10 Nov 2020 02:19:38 -0800 (PST) X-Google-Smtp-Source: ABdhPJwly/hMp1k2v9TLSEByCGuXnHS0Vbv8X+xpGjezaRNKT0VKRnPSsHOWYlmn8SBerznCB6Mb X-Received: by 2002:a17:906:e254:: with SMTP id gq20mr19689105ejb.520.1605003578251; Tue, 10 Nov 2020 02:19:38 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1605003578; cv=none; d=google.com; s=arc-20160816; b=WAi5ozXwS6CFYSejqoUA5At/EOtmPJAUDdxTeXsX7AjHFdS6dF214mUgFMJ0V8lZ+3 /RFWXOtW26yGrH8A6nkaMcs+dlkj/p5sL5Llp3pM0C9KiHDkvhUcRoPuEXFE6hJWztWH 4DnHLno7yqhMOGEbh1fCgkzFiwKq1JV6qlisCPghQ7ukFi8PyR4GBh4gwwu1dP6WEFjF cTtTW38LqdIQDjQLcE51u6hH4kYoMcSeWOTFfGBvmWgIXwgPj56PFJl0/9JqgSZ+Clqo /OLmyVU3/0OuLNR5pg12OkcOEYfm1iSg3DX5e9Pzw2/OGhw+73TNhPVYw2Sh6lN7RLtD Y/bw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=CDnrTQO3oLKsIPoRXOWKhlw6v2wORA6EgStmJKbRLyc=; b=DFPlwUFqpn4Vx7MiiriXvJHTWn4FhpuBK6K3rL9g7bhIMJXJVASpN71j84yyAt7is6 wGX3/tm4aW+ocGidE6dtLBlbU+pj09P/lWm1bnqdw1suPdcyeH/kTOtl+zHxMqvaoHs9 SlfCWPNpUdAzS1S+6cTxWyAFTcpkat9M/tIAj0ycVQ3bgt/JW2zL3DBiINGUS/Tp72K3 tSS6CVlIXkmkIRbVDakCMHGEhkZbT7B12bzNERt5pNz2wgD1nnuoEA7UjmDynea5B0Bm kHspDD1AaHQj1vUPsgxhQzfqkr7ELg5/78ynOxWOY/7enWaqYUZ3xbiWhGSq/GfGdWjE 5Ibw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=uHCxhFHS; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id q1si9329530edn.569.2020.11.10.02.19.14; Tue, 10 Nov 2020 02:19:38 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=uHCxhFHS; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729183AbgKJKPu (ORCPT + 99 others); Tue, 10 Nov 2020 05:15:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727536AbgKJKPu (ORCPT ); Tue, 10 Nov 2020 05:15:50 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D99C8C0613CF for ; Tue, 10 Nov 2020 02:15:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=CDnrTQO3oLKsIPoRXOWKhlw6v2wORA6EgStmJKbRLyc=; b=uHCxhFHSswLZ7vAYcHATP5bd/m FT+iCClwmwUEk/6LfQTpnR278IY/btZYg8TEOY20uE6JtYZp9jxRJKMxXyUotRqA9KdH0W8moJ9z1 Qy7+BivKZx7GsMNa+bXMiNXemztq0qnU18Mf3JIqDyLznHGWz6VDfQ7z2FSz8kgSa2NZhFgZ7eP4t Ro1PVrsDK8oAOkWRsKhC7EGufL0j2dMUP6xVaKSuEZTdEtgVfbmlVs1DQLzd3JEPG3Lh3MtU3ZFFH 53eB7sHqkRw/FVQqvStXNAnB75H+vIfjnMzQkxUX/i7n/lFovYYPDz8BRKX03VnVipQwbkg399bXm Zlm92mdg==; Received: from hch by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kcQgg-00054V-8l; Tue, 10 Nov 2020 10:15:42 +0000 Date: Tue, 10 Nov 2020 10:15:42 +0000 From: Christoph Hellwig To: David Brazdil Cc: kvmarm@lists.cs.columbia.edu, Mark Rutland , kernel-team@android.com, Lorenzo Pieralisi , Andrew Walbran , Suzuki K Poulose , Marc Zyngier , Quentin Perret , linux-kernel@vger.kernel.org, James Morse , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Tejun Heo , Dennis Zhou , Christoph Lameter , Will Deacon , Julien Thierry , Andrew Scull Subject: Re: [PATCH v1 00/24] Opt-in always-on nVHE hypervisor Message-ID: <20201110101542.GA17572@infradead.org> References: <20201109113233.9012-1-dbrazdil@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201109113233.9012-1-dbrazdil@google.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 09, 2020 at 11:32:09AM +0000, David Brazdil wrote: > As we progress towards being able to keep guest state private to the > host running nVHE hypervisor, this series allows the hypervisor to > install itself on newly booted CPUs before the host is allowed to run > on them. Why? I thought we were trying to kill nVHE off now that newer CPUs provide the saner virtualization extensions?