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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 0536FC388F7 for ; Tue, 10 Nov 2020 10:15:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F4AA207E8 for ; Tue, 10 Nov 2020 10:15:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="uHCxhFHS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729909AbgKJKPu (ORCPT ); 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?