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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 0D2AFC4724C for ; Thu, 30 Apr 2020 15:13:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFF6920731 for ; Thu, 30 Apr 2020 15:13:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726626AbgD3PNp (ORCPT ); Thu, 30 Apr 2020 11:13:45 -0400 Received: from foss.arm.com ([217.140.110.172]:57250 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726441AbgD3PNp (ORCPT ); Thu, 30 Apr 2020 11:13:45 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B73B4101E; Thu, 30 Apr 2020 08:13:44 -0700 (PDT) Received: from [10.37.12.139] (unknown [10.37.12.139]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4DCB23F68F; Thu, 30 Apr 2020 08:13:36 -0700 (PDT) Subject: Re: [PATCH v6 10/25] arm64: cpufeature: Export symbol read_sanitised_ftr_reg() To: jean-philippe@linaro.org, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-mm@kvack.org Cc: joro@8bytes.org, catalin.marinas@arm.com, will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com, baolu.lu@linux.intel.com, Jonathan.Cameron@huawei.com, jacob.jun.pan@linux.intel.com, christian.koenig@amd.com, felix.kuehling@amd.com, zhangfei.gao@linaro.org, jgg@ziepe.ca, xuzaibo@huawei.com, fenghua.yu@intel.com, hch@infradead.org References: <20200430143424.2787566-1-jean-philippe@linaro.org> <20200430143424.2787566-11-jean-philippe@linaro.org> From: Suzuki K Poulose Message-ID: Date: Thu, 30 Apr 2020 16:18:29 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20200430143424.2787566-11-jean-philippe@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 04/30/2020 03:34 PM, Jean-Philippe Brucker wrote: > The SMMUv3 driver would like to read the MMFR0 PARANGE field in order to > share CPU page tables with devices. Allow the driver to be built as > module by exporting the read_sanitized_ftr_reg() cpufeature symbol. > > Cc: Suzuki K Poulose > Signed-off-by: Jean-Philippe Brucker Acked-by: Suzuki K Poulose > --- > arch/arm64/kernel/cpufeature.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c > index 9fac745aa7bb2..5f6adbf4ae893 100644 > --- a/arch/arm64/kernel/cpufeature.c > +++ b/arch/arm64/kernel/cpufeature.c > @@ -841,6 +841,7 @@ u64 read_sanitised_ftr_reg(u32 id) > BUG_ON(!regp); > return regp->sys_val; > } > +EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg); > > #define read_sysreg_case(r) \ > case r: return read_sysreg_s(r) >