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 21171C433DB for ; Mon, 25 Jan 2021 12:13:27 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 780E6224F9 for ; Mon, 25 Jan 2021 12:13:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 780E6224F9 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 B9D294B5DF; Mon, 25 Jan 2021 07:13:25 -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 y4THChUGDaUt; Mon, 25 Jan 2021 07:13:24 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C9FDF4B5D8; Mon, 25 Jan 2021 07:13:24 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id A1C014B4BF for ; Mon, 25 Jan 2021 07:13:23 -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 6b4dNXpLItga for ; Mon, 25 Jan 2021 07:13:22 -0500 (EST) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 7C8AE4B4BD for ; Mon, 25 Jan 2021 07:13:22 -0500 (EST) Received: by mail.kernel.org (Postfix) with ESMTPSA id A5E552231F; Mon, 25 Jan 2021 12:13:18 +0000 (UTC) Date: Mon, 25 Jan 2021 12:13:16 +0000 From: Catalin Marinas To: Marc Zyngier Subject: Re: [PATCH v5 04/21] arm64: Provide an 'upgrade to VHE' stub hypercall Message-ID: <20210125121315.GA25360@gaia> References: <20210125105019.2946057-1-maz@kernel.org> <20210125105019.2946057-5-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210125105019.2946057-5-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 10:50:02AM +0000, Marc Zyngier wrote: > As we are about to change the way a VHE system boots, let's > provide the core helper, in the form of a stub hypercall that > enables VHE and replicates the full EL1 context at EL2, thanks > to EL1 and VHE-EL2 being extremely similar. > > On exception return, the kernel carries on at EL2. Fancy! > > Nothing calls this new hypercall yet, so no functional change. > > 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