From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933819AbcKPSLm (ORCPT ); Wed, 16 Nov 2016 13:11:42 -0500 Received: from foss.arm.com ([217.140.101.70]:33270 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753982AbcKPSLi (ORCPT ); Wed, 16 Nov 2016 13:11:38 -0500 Date: Wed, 16 Nov 2016 18:11:34 +0000 From: Catalin Marinas To: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com, ard.biesheuvel@linaro.org, marc.zyngier@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: Re: [PATCH v3 0/2] arm64: Support systems without FP/ASIMD Message-ID: <20161116181133.GC3224@e104818-lin.cambridge.arm.com> References: <1478613381-5718-1-git-send-email-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1478613381-5718-1-git-send-email-suzuki.poulose@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 08, 2016 at 01:56:19PM +0000, Suzuki K. Poulose wrote: > This series adds supports to the kernel and KVM hyp to handle > systems without FP/ASIMD properly. At the moment the kernel > doesn't check if the FP unit is available before accessing > the registers (e.g during context switch). Also for KVM, > we trap the FP/ASIMD accesses and handle it by injecting an > undefined instruction into the VM on systems without FP. > > Tested on a FVP_Base-AEM-v8A model by disabling VFP on at > least one CPU ( -C clusterX.cpuY.vfp-present=0 ). > > Changes since V2: > - Dropped cleanup patch for arm64/crypto/aes-ce-ccm-glue.c > - Removed static_key check from cpus_have_cap. All users with > constant caps should use the new API to make use of static_keys. > - Removed a dedicated static_key used in irqchip-gic-v3.c for > Cavium errata with the new API. > > Applies on v4.9-rc4 + [1] (which is pushed for rc5) > > [1] http://marc.info/?l=linux-arm-kernel&m=147819889813214&w=2 I queued the patches for 4.10 with a slight modification as I haven't cherry-picked the patch above. I'll push the for-next/core branch out once I've done some testing. Thanks. -- Catalin