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=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 AE876C433DF for ; Mon, 18 May 2020 04:22:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6C76520787 for ; Mon, 18 May 2020 04:22:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6C76520787 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0E7E2900003; Mon, 18 May 2020 00:22:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 07102900002; Mon, 18 May 2020 00:22:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E7A5C900003; Mon, 18 May 2020 00:22:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0216.hostedemail.com [216.40.44.216]) by kanga.kvack.org (Postfix) with ESMTP id C6DAD900002 for ; Mon, 18 May 2020 00:22:51 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 908B2181AC9CC for ; Mon, 18 May 2020 04:22:51 +0000 (UTC) X-FDA: 76828544142.09.honey04_703510356350f X-HE-Tag: honey04_703510356350f X-Filterd-Recvd-Size: 4749 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Mon, 18 May 2020 04:22:50 +0000 (UTC) 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 1E4D7101E; Sun, 17 May 2020 21:22:50 -0700 (PDT) Received: from [10.163.74.67] (unknown [10.163.74.67]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 650DB3F68F; Sun, 17 May 2020 21:22:45 -0700 (PDT) Subject: Re: [RFC PATCH v3 1/2] arm64: tlb: Detect the ARMv8.4 TLBI RANGE feature To: Zhenyu Ye , Mark Rutland Cc: will@kernel.org, catalin.marinas@arm.com, suzuki.poulose@arm.com, maz@kernel.org, steven.price@arm.com, guohanjun@huawei.com, olof@lixom.net, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, xiexiangyou@huawei.com, zhangshaokun@hisilicon.com, linux-mm@kvack.org, arm@kernel.org, prime.zeng@hisilicon.com, kuhn.chenqun@huawei.com, linux-arm-kernel@lists.infradead.org References: <20200414112835.1121-1-yezhenyu2@huawei.com> <20200414112835.1121-2-yezhenyu2@huawei.com> <20200505101405.GB82424@C02TD0UTHF1T.local> From: Anshuman Khandual Message-ID: <4d8cb48c-4f47-d966-f29b-3343bd966c5f@arm.com> Date: Mon, 18 May 2020 09:52:12 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=gbk Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 05/11/2020 05:55 PM, Zhenyu Ye wrote: > On 2020/5/5 18:14, Mark Rutland wrote: >> On Tue, Apr 14, 2020 at 07:28:34PM +0800, Zhenyu Ye wrote: >>> ARMv8.4-TLBI provides TLBI invalidation instruction that apply to a >>> range of input addresses. This patch detect this feature. >>> >>> Signed-off-by: Zhenyu Ye >>> --- >>> arch/arm64/include/asm/cpucaps.h | 3 ++- >>> arch/arm64/include/asm/sysreg.h | 4 ++++ >>> arch/arm64/kernel/cpufeature.c | 11 +++++++++++ >>> 3 files changed, 17 insertions(+), 1 deletion(-) >>> >>> diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h >>> index 8eb5a088ae65..950095a72617 100644 >>> --- a/arch/arm64/include/asm/cpucaps.h >>> +++ b/arch/arm64/include/asm/cpucaps.h >>> @@ -61,7 +61,8 @@ >>> #define ARM64_HAS_AMU_EXTN 51 >>> #define ARM64_HAS_ADDRESS_AUTH 52 >>> #define ARM64_HAS_GENERIC_AUTH 53 >>> +#define ARM64_HAS_TLBI_RANGE 54 >>> >>> -#define ARM64_NCAPS 54 >>> +#define ARM64_NCAPS 55 >>> >>> #endif /* __ASM_CPUCAPS_H */ >>> diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h >>> index ebc622432831..ac1b98650234 100644 >>> --- a/arch/arm64/include/asm/sysreg.h >>> +++ b/arch/arm64/include/asm/sysreg.h >>> @@ -592,6 +592,7 @@ >>> >>> /* id_aa64isar0 */ >>> #define ID_AA64ISAR0_RNDR_SHIFT 60 >>> +#define ID_AA64ISAR0_TLBI_RANGE_SHIFT 56 >>> #define ID_AA64ISAR0_TS_SHIFT 52 >>> #define ID_AA64ISAR0_FHM_SHIFT 48 >>> #define ID_AA64ISAR0_DP_SHIFT 44 >>> @@ -605,6 +606,9 @@ >>> #define ID_AA64ISAR0_SHA1_SHIFT 8 >>> #define ID_AA64ISAR0_AES_SHIFT 4 >>> >>> +#define ID_AA64ISAR0_TLBI_RANGE_NI 0x0 >>> +#define ID_AA64ISAR0_TLBI_RANGE 0x2 >>> + >>> /* id_aa64isar1 */ >>> #define ID_AA64ISAR1_I8MM_SHIFT 52 >>> #define ID_AA64ISAR1_DGH_SHIFT 48 >>> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c >>> index 9fac745aa7bb..31bcfd0722b5 100644 >>> --- a/arch/arm64/kernel/cpufeature.c >>> +++ b/arch/arm64/kernel/cpufeature.c >>> @@ -124,6 +124,7 @@ static bool __system_matches_cap(unsigned int n); >>> */ >>> static const struct arm64_ftr_bits ftr_id_aa64isar0[] = { >>> ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_RNDR_SHIFT, 4, 0), >>> + ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_TLBI_RANGE_SHIFT, 4, 0), Hello Zhenyu, This is already being added through another patch [1] in a series [2] which primarily has cpufeature changes. I will soon update the series making this feature FTR_HIDDEN. [1] https://patchwork.kernel.org/patch/11523881/ [2] https://patchwork.kernel.org/project/linux-arm-kernel/list/?series=281211 I am planning to respin the series (V4) based on arm64 tree (for-next/cpufeature). So could you please rebase this patch (probably dropping cpufeature related changes) on upcoming V4, so that all the changes will be based on arm64 tree (for-next/cpufeature). - Anshuman