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=-10.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 C0208C433E0 for ; Mon, 25 Jan 2021 12:18:12 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 7715A224D4 for ; Mon, 25 Jan 2021 12:18:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7715A224D4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.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=yPb6g/LUK8aJgXl6tq9EkCIVHnQtdqKNMAJQWrJmAB4=; b=MS6b0k2v39oqKu14xw1sN8WQr 8SdGiF8V0MkBm/DA09IRFYhPo74IgE2BCjyG6y0Rhh48Q8yT++Cabs2D57SqNbYTlIK9b7rbvTeFh iOFI0f8+U3Tyzn+DstRRJSq2se/a71ZkLNsb8ibR9MOgrSMN+I7RXBbV+Mqjax5QtoqqjYcZDp7hu /SS9jHmg26If9QXNxbe3H+ev3xr1fyYOndPGTYJx25TKFatSCgA9sQyRWFCjdRG3e33KLcqF2Cg7/ y2Ae4kX78pcaoTdTYQe8VOqL2iCRpPsZeSxbtSXnT169QO+8sFKKltBhEq8Y+iIu4V0q75co1TFNp Z0mcVVgZg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l40kf-0005aT-TJ; Mon, 25 Jan 2021 12:13:49 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l40kd-0005Zl-OX for linux-arm-kernel@lists.infradead.org; Mon, 25 Jan 2021 12:13:48 +0000 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) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210125_071347_863822_A21179BA X-CRM114-Status: GOOD ( 13.99 ) 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: Mark Rutland , Jing Zhang , Prasad Sodagudi , Srinivas Ramana , Suzuki K Poulose , Alexandru Elisei , linux-kernel@vger.kernel.org, Ard Biesheuvel , James Morse , Julien Thierry , Ajay Patil , kernel-team@android.com, David Brazdil , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel