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 3FC82C34050 for ; Wed, 19 Feb 2020 14:56:39 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 0D97D2465D for ; Wed, 19 Feb 2020 14:56:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="D9heFYMG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0D97D2465D 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+infradead-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=bombadil.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:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zsPFsyJQF+KtQR+n8VMjZJrjxwlP0Ow6WyzP/9V2BgQ=; b=D9heFYMGGG4uTA yqSdw2FK8IbgZNe8OKI9P2JZLhjyI1TxO5m/sN5OJxzYY5p8HoL5uYTwJY7YXT+PuMHo58H1CTRDz cPzIxLty13Cep0OHe+Ufqj/Dhm3yEMhjhCUyf5wa3GfUMPw41YnZeJvEmIZt/Cn9XBXIg8NPHb3NB W3ysE5z1YR8qfGc7OtBykD3kFZfTxZ5ZeZeIHiuCAlwWSICE1ivT3+IFbhIfNroPmR/4PyJdTamTy FOMHqHASa6S+gZFJIw8uACkEftxEuV14YmdbjspQ12UzWc2bRJj/z5YTuQwgRAUsNafoNmNqTz4Bf Cc0dhyurkWqge4y+d05w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j4Qm7-00015z-Ky; Wed, 19 Feb 2020 14:56:31 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j4Qm4-00014t-Ci for linux-arm-kernel@lists.infradead.org; Wed, 19 Feb 2020 14:56:29 +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 272D81FB; Wed, 19 Feb 2020 06:56:26 -0800 (PST) Received: from localhost (e113682-lin.copenhagen.arm.com [10.32.145.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B16633F68F; Wed, 19 Feb 2020 06:56:25 -0800 (PST) Date: Wed, 19 Feb 2020 15:56:24 +0100 From: Christoffer Dall To: Marc Zyngier Subject: Re: [RFC PATCH 0/5] Removing support for 32bit KVM/arm host Message-ID: <20200219145624.GD26684@e113682-lin.lund.arm.com> References: <20200210141324.21090-1-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200210141324.21090-1-maz@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200219_065628_473359_038DC288 X-CRM114-Status: GOOD ( 16.05 ) 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: Anders Berg , Vladimir Murzin , Russell King , Arnd Bergmann , kvm@vger.kernel.org, Suzuki K Poulose , Quentin Perret , James Morse , linux-arm-kernel@lists.infradead.org, Paolo Bonzini , Will Deacon , kvmarm@lists.cs.columbia.edu, Julien Thierry Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 10, 2020 at 02:13:19PM +0000, Marc Zyngier wrote: > KVM/arm was merged just over 7 years ago, and has lived a very quiet > life so far. It mostly works if you're prepared to deal with its > limitations, it has been a good prototype for the arm64 version, > but it suffers a few problems: > > - It is incomplete (no debug support, no PMU) > - It hasn't followed any of the architectural evolutions > - It has zero users (I don't count myself here) > - It is more and more getting in the way of new arm64 developments > > So here it is: unless someone screams and shows that they rely on > KVM/arm to be maintained upsteam, I'll remove 32bit host support > form the tree. One of the reasons that makes me confident nobody is > using it is that I never receive *any* bug report. Yes, it is perfect. > But if you depend on KVM/arm being available in mainline, please shout. > > To reiterate: 32bit guest support for arm64 stays, of course. Only > 32bit host goes. Once this is merged, I plan to move virt/kvm/arm to > arm64, and cleanup all the now unnecessary abstractions. > > The patches have been generated with the -D option to avoid spamming > everyone with huge diffs, and there is a kvm-arm/goodbye branch in > my kernel.org repository. Acked-by: Christoffer Dall _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel