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 16046C43217 for ; Tue, 26 Jan 2021 19:23:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D57A122B3B for ; Tue, 26 Jan 2021 19:23:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388530AbhAZFos (ORCPT ); Tue, 26 Jan 2021 00:44:48 -0500 Received: from mail.kernel.org ([198.145.29.99]:33902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727859AbhAYMON (ORCPT ); Mon, 25 Jan 2021 07:14:13 -0500 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 Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, Will Deacon , Mark Rutland , David Brazdil , Alexandru Elisei , Ard Biesheuvel , Jing Zhang , Ajay Patil , Prasad Sodagudi , Srinivas Ramana , James Morse , Julien Thierry , Suzuki K Poulose , kernel-team@android.com 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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210125105019.2946057-5-maz@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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 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 2444AC433E0 for ; Mon, 25 Jan 2021 12:15:24 +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 C59942231F for ; Mon, 25 Jan 2021 12:15:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C59942231F 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=S32oxmHpruxR5cy/PHvJvXzjHtw/9XharCoaBqbdbYM=; b=eV52ey4rgFEikevur9Fo3WN5i /syH9vt34czhOPob0/8mOvmtOtdRKIrFJq/V4jQR+EfZi+7EzrK67edBVU7yeDOYVPL7E8KAqMCrP jBHuZHlQuYgNfe0GHEf/wYocP7lEmzrfW32CenLmIWO+xVmWaMgYrxN153gbkFvaVaGDKD+QwIlWA Ps0uFknQyZzi6flV78cDQX5yFxzgUdvcoHd+Q9xYUbQGijITOYNAE0xZX/KDY3lWIWDlpQ32d0ErD 7qK8HU10kbOEDKMGC8OFXO2+jd6X+tj5IW0gG9NXVTk0yktgPcaSJrmfT4hJYICgOH4aGQ6lVD37W dc2urXWqQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l40kH-0005Xp-Fz; Mon, 25 Jan 2021 12:13:25 +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 1l40kF-0005XG-9B for linux-arm-kernel@lists.infradead.org; Mon, 25 Jan 2021 12:13:24 +0000 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) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210125_071323_411741_C3DDB21E X-CRM114-Status: GOOD ( 10.51 ) 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 10:50:02AM +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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel