From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937400AbdAESjW (ORCPT ); Thu, 5 Jan 2017 13:39:22 -0500 Received: from foss.arm.com ([217.140.101.70]:57734 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932152AbdAESjL (ORCPT ); Thu, 5 Jan 2017 13:39:11 -0500 Date: Thu, 5 Jan 2017 18:39:06 +0000 From: Catalin Marinas To: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com, ryan.arnold@linaro.org, sid@reserved-bit.com, aph@redhat.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, adhemerval.zanella@linaro.org, dave.martin@arm.com Subject: Re: [PATCH v3 8/9] arm64: cpufeature: Expose CPUID registers by emulation Message-ID: <20170105183906.GI29765@e104818-lin.cambridge.arm.com> References: <1483552147-9605-1-git-send-email-suzuki.poulose@arm.com> <1483552147-9605-9-git-send-email-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1483552147-9605-9-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 Wed, Jan 04, 2017 at 05:49:06PM +0000, Suzuki K. Poulose wrote: > This patch adds the hook for emulating MRS instruction to > export the 'user visible' value of supported system registers. > We emulate only the following id space for system registers: > > Op0=3, Op1=0, CRn=0, CRm=[0, 4-7] > > The rest will fall back to SIGILL. This capability is also > advertised via a new HWCAP_CPUID. > > Cc: Catalin Marinas > Cc: Mark Rutland > Cc: Will Deacon > Signed-off-by: Suzuki K Poulose Reviewed-by: Catalin Marinas