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 B5665C433F5 for ; Mon, 21 Feb 2022 11:55:55 +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=yKRMFZzjBtPm7MTSHLvdE7xxMbnO/CShUuvSVHTJzPU=; b=PxITeyYfMkbb6Y Vm5NoghybaW3YqGkGqx9VeK4GfBIpr88hUfhAGu9pK/wxT0eLtoGrtBgzQt8jPCyYVpOFAzNBZIrR H4REFtSh10Isoz1U+4vNBlOiPPy0XlCMMu6D3TP7MZlSAyhscdn2dG7S3AFLlCDSznSagBrlu6X+e 6RHTWjbdUK2erYXimtwDwLdZhn44Ji6yFOYCd+eC3ea11VP6A5X69O66gl2RGKfyj2RoromZ6qU4T 6XlK5KUfQ1tO47az3cO/+EK8l4mi8KCQoplEBaf2/vhTRlsorGcjEdTu32v7+pLUD6AkMA+FMswJR yFXviQK+Tex57X6m8BcQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nM7HB-005Tjh-Bs; Mon, 21 Feb 2022 11:54:45 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nM7H7-005TiG-VC for linux-arm-kernel@lists.infradead.org; Mon, 21 Feb 2022 11:54:43 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id ED1A0B810F5; Mon, 21 Feb 2022 11:54:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5F63C340EC; Mon, 21 Feb 2022 11:54:35 +0000 (UTC) Date: Mon, 21 Feb 2022 11:54:32 +0000 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan , Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: Re: [PATCH v11 09/40] arm64/sme: Early CPU setup for SME Message-ID: References: <20220207152109.197566-1-broonie@kernel.org> <20220207152109.197566-10-broonie@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220207152109.197566-10-broonie@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220221_035442_212587_6E9370D5 X-CRM114-Status: GOOD ( 12.68 ) 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, Feb 07, 2022 at 03:20:38PM +0000, Mark Brown wrote: > SME requires similar setup to that for SVE: disable traps to EL2 and > make sure that the maximum vector length is available to EL1, for SME we > have two traps - one for SME itself and one for TPIDR2. > > In addition since we currently make no active use of priority control > for SCMUs we map all SME priorities lower ELs may configure to 0, the > architecture specified minimum priority, to ensure that nothing we > manage is able to configure itself to consume excessive resources. This > will need to be revisited should there be a need to manage SME > priorities at runtime. > > Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel