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=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 44B0FC433E0 for ; Mon, 25 Jan 2021 12:13:52 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id A3934224F9 for ; Mon, 25 Jan 2021 12:13:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3934224F9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 346224B538; Mon, 25 Jan 2021 07:13:51 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bwkObp0jwHZk; Mon, 25 Jan 2021 07:13:49 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1F20B4B5EF; Mon, 25 Jan 2021 07:13:49 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C33A14B5E7 for ; Mon, 25 Jan 2021 07:13:48 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id i8wx1ulWveYb for ; Mon, 25 Jan 2021 07:13:47 -0500 (EST) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id DE9694B5DC for ; Mon, 25 Jan 2021 07:13:47 -0500 (EST) Received: by mail.kernel.org (Postfix) with ESMTPSA id 447BE22C9E; Mon, 25 Jan 2021 12:13:44 +0000 (UTC) Date: Mon, 25 Jan 2021 12:13:41 +0000 From: Catalin Marinas To: Marc Zyngier Subject: Re: [PATCH v5 05/21] arm64: Initialise as nVHE before switching to VHE Message-ID: <20210125121341.GB25360@gaia> References: <20210125105019.2946057-1-maz@kernel.org> <20210125105019.2946057-6-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210125105019.2946057-6-maz@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Prasad Sodagudi , Srinivas Ramana , linux-kernel@vger.kernel.org, Ard Biesheuvel , Ajay Patil , kernel-team@android.com, Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Mon, Jan 25, 2021 at 10:50:03AM +0000, Marc Zyngier wrote: > As we are aiming to be able to control whether we enable VHE or > not, let's always drop down to EL1 first, and only then upgrade > to VHE if at all possible. > > This means that if the kernel is booted at EL2, we always start > with a nVHE init, drop to EL1 to initialise the the kernel, and > only then upgrade the kernel EL to EL2 if possible (the process > is obviously shortened for secondary CPUs). > > The resume path is handled similarly to a secondary CPU boot. > > Signed-off-by: Marc Zyngier > Acked-by: David Brazdil Acked-by: Catalin Marinas _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm