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 Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFE4AC433EF for ; Tue, 18 Jan 2022 16:05:20 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 868B749E3F; Tue, 18 Jan 2022 11:05:20 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@armlinux.org.uk 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 PCrDC2mpCRT5; Tue, 18 Jan 2022 11:05:19 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3A08749DFF; Tue, 18 Jan 2022 11:05:19 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C1C6D49DF6 for ; Tue, 18 Jan 2022 11:05:17 -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 a252l5HzO5Ve for ; Tue, 18 Jan 2022 11:05:16 -0500 (EST) Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 367ED40CF3 for ; Tue, 18 Jan 2022 11:05:16 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wrnLIP+71+njOMxWsp1LiwlBKmYSKQOTEZ9OSDhzlBY=; b=GaoR7KabVGEDd50/LGY4HObsQ+ T2SEGodicEblZpVvtke28pNL3t7phRRkfZuT3A++i3zWFmwUZyPLzi9C7PsoMkxxK8LxxGgalOPCU HoausbpRmbvecf3N15FyEW5jLGphH87pKLLCGm/urpGcHcPBZquUSGKPi/p1JKR6pZf0Hgd1HYpWw H5SodLFc2IAP6jM/cltytKKJe1wDqvnUZx2j43Xh6NlSDAY6yp7bn13whmR2yZy5eiDiIh5G7YImO 0ONeinZkCSOyhuFKy+San3QFbPOshL8PUGJyyyChNkEDiH9LERw4kxE8J77gIdD+9pcdaIIR+QHy0 YLAUR/2g==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:56770) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n9qyw-0003xO-IQ; Tue, 18 Jan 2022 16:05:14 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1n9qyv-0004QH-HS; Tue, 18 Jan 2022 16:05:13 +0000 Date: Tue, 18 Jan 2022 16:05:13 +0000 From: "Russell King (Oracle)" To: Marc Zyngier Subject: Re: [PATCH v5 16/69] KVM: arm64: nv: Handle trapped ERET from virtual EL2 Message-ID: References: <20211129200150.351436-1-maz@kernel.org> <20211129200150.351436-17-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211129200150.351436-17-maz@kernel.org> Cc: kernel-team@android.com, kvm@vger.kernel.org, Andre Przywara , Christoffer Dall , kvmarm@lists.cs.columbia.edu, Ganapatrao Kulkarni , 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, Nov 29, 2021 at 08:00:57PM +0000, Marc Zyngier wrote: > From: Christoffer Dall > > When a guest hypervisor running virtual EL2 in EL1 executes an ERET > instruction, we will have set HCR_EL2.NV which traps ERET to EL2, so > that we can emulate the exception return in software. > > Signed-off-by: Christoffer Dall > Signed-off-by: Marc Zyngier Reviewed-by: Russell King (Oracle) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 93B3FC433F5 for ; Tue, 18 Jan 2022 16:06:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=jlcE2YkZmKPTHmz5JI7C7vEalYpDycncKrPnryGiMn8=; b=NvmgesQPPxUhA5 be+x2epnUC5IKCKiYdf7cdh7e2hinm4YkYYPhjgUZheT2TpsyzQty06GrpcS2RmaniyZVzsljXNQN BNDzJNphglvyxhw5IMHKAYneO56hy6aWIw8Ar5+VKeHCawRJoWE8aRWnl5KHNWPyL9yRJZLI2ycS/ I8Lc6oiwqzGmMEbh8EE62Wy0rwt1o2qxpic0qFcUf0sQNQplfNENC8WEvIndQcJ6dcD6RBNrS9vTm EG8xmHaspGOfRwoE+IzQGFrQ/2ZCmfpBBS9xD/RAP2fAuWFiyWkxiSVnegyiYTqDGB74w0kT7hyhj vH7DJgwGe56d6tDsM0UA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n9qz1-0029TR-GJ; Tue, 18 Jan 2022 16:05:19 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n9qyy-0029Si-EA for linux-arm-kernel@lists.infradead.org; Tue, 18 Jan 2022 16:05:17 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wrnLIP+71+njOMxWsp1LiwlBKmYSKQOTEZ9OSDhzlBY=; b=GaoR7KabVGEDd50/LGY4HObsQ+ T2SEGodicEblZpVvtke28pNL3t7phRRkfZuT3A++i3zWFmwUZyPLzi9C7PsoMkxxK8LxxGgalOPCU HoausbpRmbvecf3N15FyEW5jLGphH87pKLLCGm/urpGcHcPBZquUSGKPi/p1JKR6pZf0Hgd1HYpWw H5SodLFc2IAP6jM/cltytKKJe1wDqvnUZx2j43Xh6NlSDAY6yp7bn13whmR2yZy5eiDiIh5G7YImO 0ONeinZkCSOyhuFKy+San3QFbPOshL8PUGJyyyChNkEDiH9LERw4kxE8J77gIdD+9pcdaIIR+QHy0 YLAUR/2g==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:56770) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n9qyw-0003xO-IQ; Tue, 18 Jan 2022 16:05:14 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1n9qyv-0004QH-HS; Tue, 18 Jan 2022 16:05:13 +0000 Date: Tue, 18 Jan 2022 16:05:13 +0000 From: "Russell King (Oracle)" To: Marc Zyngier Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Andre Przywara , Christoffer Dall , Jintack Lim , Haibo Xu , Ganapatrao Kulkarni , James Morse , Suzuki K Poulose , Alexandru Elisei , kernel-team@android.com Subject: Re: [PATCH v5 16/69] KVM: arm64: nv: Handle trapped ERET from virtual EL2 Message-ID: References: <20211129200150.351436-1-maz@kernel.org> <20211129200150.351436-17-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211129200150.351436-17-maz@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220118_080516_503697_786B8645 X-CRM114-Status: UNSURE ( 8.26 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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, Nov 29, 2021 at 08:00:57PM +0000, Marc Zyngier wrote: > From: Christoffer Dall > > When a guest hypervisor running virtual EL2 in EL1 executes an ERET > instruction, we will have set HCR_EL2.NV which traps ERET to EL2, so > that we can emulate the exception return in software. > > Signed-off-by: Christoffer Dall > Signed-off-by: Marc Zyngier Reviewed-by: Russell King (Oracle) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61253C433FE for ; Tue, 18 Jan 2022 16:05:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242945AbiARQFU (ORCPT ); Tue, 18 Jan 2022 11:05:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346202AbiARQFT (ORCPT ); Tue, 18 Jan 2022 11:05:19 -0500 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB1E2C061748 for ; Tue, 18 Jan 2022 08:05:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wrnLIP+71+njOMxWsp1LiwlBKmYSKQOTEZ9OSDhzlBY=; b=GaoR7KabVGEDd50/LGY4HObsQ+ T2SEGodicEblZpVvtke28pNL3t7phRRkfZuT3A++i3zWFmwUZyPLzi9C7PsoMkxxK8LxxGgalOPCU HoausbpRmbvecf3N15FyEW5jLGphH87pKLLCGm/urpGcHcPBZquUSGKPi/p1JKR6pZf0Hgd1HYpWw H5SodLFc2IAP6jM/cltytKKJe1wDqvnUZx2j43Xh6NlSDAY6yp7bn13whmR2yZy5eiDiIh5G7YImO 0ONeinZkCSOyhuFKy+San3QFbPOshL8PUGJyyyChNkEDiH9LERw4kxE8J77gIdD+9pcdaIIR+QHy0 YLAUR/2g==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:56770) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n9qyw-0003xO-IQ; Tue, 18 Jan 2022 16:05:14 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1n9qyv-0004QH-HS; Tue, 18 Jan 2022 16:05:13 +0000 Date: Tue, 18 Jan 2022 16:05:13 +0000 From: "Russell King (Oracle)" To: Marc Zyngier Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Andre Przywara , Christoffer Dall , Jintack Lim , Haibo Xu , Ganapatrao Kulkarni , James Morse , Suzuki K Poulose , Alexandru Elisei , kernel-team@android.com Subject: Re: [PATCH v5 16/69] KVM: arm64: nv: Handle trapped ERET from virtual EL2 Message-ID: References: <20211129200150.351436-1-maz@kernel.org> <20211129200150.351436-17-maz@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211129200150.351436-17-maz@kernel.org> Sender: Russell King (Oracle) Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Mon, Nov 29, 2021 at 08:00:57PM +0000, Marc Zyngier wrote: > From: Christoffer Dall > > When a guest hypervisor running virtual EL2 in EL1 executes an ERET > instruction, we will have set HCR_EL2.NV which traps ERET to EL2, so > that we can emulate the exception return in software. > > Signed-off-by: Christoffer Dall > Signed-off-by: Marc Zyngier Reviewed-by: Russell King (Oracle) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!