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=ham 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 DDE39C47247 for ; Tue, 5 May 2020 09:20:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0C97206B9 for ; Tue, 5 May 2020 09:20:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728668AbgEEJUH (ORCPT ); Tue, 5 May 2020 05:20:07 -0400 Received: from foss.arm.com ([217.140.110.172]:35376 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728650AbgEEJUH (ORCPT ); Tue, 5 May 2020 05:20:07 -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 A5F2A30E; Tue, 5 May 2020 02:20:06 -0700 (PDT) Received: from [10.37.12.10] (unknown [10.37.12.10]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id EC9973F305; Tue, 5 May 2020 02:20:02 -0700 (PDT) Subject: Re: [PATCH V3 11/16] arm64/cpufeature: Add remaining feature bits in ID_AA64PFR1 register To: anshuman.khandual@arm.com, linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, linux-kernel@vger.kernel.org References: <1588426445-24344-1-git-send-email-anshuman.khandual@arm.com> <1588426445-24344-12-git-send-email-anshuman.khandual@arm.com> From: Suzuki K Poulose Message-ID: <4c6e9f6e-fffa-8fdf-ad1a-f0c6514c3571@arm.com> Date: Tue, 5 May 2020 10:24:57 +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: <1588426445-24344-12-git-send-email-anshuman.khandual@arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/02/2020 02:34 PM, Anshuman Khandual wrote: > Enable the following features bits in ID_AA64PFR1 register as per ARM DDI > 0487F.a specification. > > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Mark Rutland > Cc: Suzuki K Poulose > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > > Suggested-by: Will Deacon > Signed-off-by: Anshuman Khandual > --- > arch/arm64/include/asm/sysreg.h | 4 ++++ > arch/arm64/kernel/cpufeature.c | 4 ++++ > 2 files changed, 8 insertions(+) > > diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h > index c93ea6613f51..f1c0d874220a 100644 > --- a/arch/arm64/include/asm/sysreg.h > +++ b/arch/arm64/include/asm/sysreg.h > @@ -666,7 +666,11 @@ > #define ID_AA64PFR0_EL0_32BIT_64BIT 0x2 > > /* id_aa64pfr1 */ > +#define ID_AA64PFR1_MPAMFRAC_SHIFT 16 > +#define ID_AA64PFR1_RASFRAC_SHIFT 12 > +#define ID_AA64PFR1_MTE_SHIFT 8 > #define ID_AA64PFR1_SSBS_SHIFT 4 > +#define ID_AA64PFR1_BT_SHIFT 0 > > #define ID_AA64PFR1_SSBS_PSTATE_NI 0 > #define ID_AA64PFR1_SSBS_PSTATE_ONLY 1 > diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c > index f5a39e040804..181e09d62147 100644 > --- a/arch/arm64/kernel/cpufeature.c > +++ b/arch/arm64/kernel/cpufeature.c > @@ -233,7 +233,11 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = { > }; > > static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = { > + ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_MPAMFRAC_SHIFT, 4, 0), > + ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_RASFRAC_SHIFT, 4, 0), These should be hidden as well. > + ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_MTE_SHIFT, 4, 0), > ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_SSBS_SHIFT, 4, ID_AA64PFR1_SSBS_PSTATE_NI), > + ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_BT_SHIFT, 4, 0), I would say remove the MTE, BTI fields for now. As they must be VISIBLE, but with the kernel support for these merged. They will be added with their respective series. Suzuki