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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 8108BC433DF for ; Wed, 8 Jul 2020 12:42:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4D83420720 for ; Wed, 8 Jul 2020 12:42:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4D83420720 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CAE3D6B00CE; Wed, 8 Jul 2020 08:42:12 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C5FBA6B00D0; Wed, 8 Jul 2020 08:42:12 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B9CD26B00D5; Wed, 8 Jul 2020 08:42:12 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0007.hostedemail.com [216.40.44.7]) by kanga.kvack.org (Postfix) with ESMTP id A5EF56B00CE for ; Wed, 8 Jul 2020 08:42:12 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 5FCA9181AC9CB for ; Wed, 8 Jul 2020 12:42:12 +0000 (UTC) X-FDA: 77014871304.14.juice94_540971c26ebd Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin14.hostedemail.com (Postfix) with ESMTP id 4FFE41801BE28 for ; Wed, 8 Jul 2020 12:40:52 +0000 (UTC) X-HE-Tag: juice94_540971c26ebd X-Filterd-Recvd-Size: 3496 Received: from huawei.com (szxga05-in.huawei.com [45.249.212.191]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Wed, 8 Jul 2020 12:40:51 +0000 (UTC) Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 0728392B2E12DCE78B07; Wed, 8 Jul 2020 20:40:46 +0800 (CST) Received: from DESKTOP-KKJBAGG.china.huawei.com (10.174.186.75) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Wed, 8 Jul 2020 20:40:39 +0800 From: Zhenyu Ye To: , , , , , , CC: , , , , , , , , , Subject: [RFC PATCH v5 1/2] arm64: tlb: Detect the ARMv8.4 TLBI RANGE feature Date: Wed, 8 Jul 2020 20:40:30 +0800 Message-ID: <20200708124031.1414-2-yezhenyu2@huawei.com> X-Mailer: git-send-email 2.22.0.windows.1 In-Reply-To: <20200708124031.1414-1-yezhenyu2@huawei.com> References: <20200708124031.1414-1-yezhenyu2@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.186.75] X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: 4FFE41801BE28 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 Content-Transfer-Encoding: quoted-printable 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: 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 | 3 +++ arch/arm64/kernel/cpufeature.c | 10 ++++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cp= ucaps.h index d7b3bb0cb180..96fe898bfb5f 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -62,7 +62,8 @@ #define ARM64_HAS_GENERIC_AUTH 52 #define ARM64_HAS_32BIT_EL1 53 #define ARM64_BTI 54 +#define ARM64_HAS_TLBI_RANGE 55 =20 -#define ARM64_NCAPS 55 +#define ARM64_NCAPS 56 =20 #endif /* __ASM_CPUCAPS_H */ diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sys= reg.h index 463175f80341..b4eb2e5601f2 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -617,6 +617,9 @@ #define ID_AA64ISAR0_SHA1_SHIFT 8 #define ID_AA64ISAR0_AES_SHIFT 4 =20 +#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/cpufeatur= e.c index 9fae0efc80c1..5491bf47e62c 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2058,6 +2058,16 @@ static const struct arm64_cpu_capabilities arm64_f= eatures[] =3D { .sign =3D FTR_UNSIGNED, }, #endif + { + .desc =3D "TLB range maintenance instruction", + .capability =3D ARM64_HAS_TLBI_RANGE, + .type =3D ARM64_CPUCAP_SYSTEM_FEATURE, + .matches =3D has_cpuid_feature, + .sys_reg =3D SYS_ID_AA64ISAR0_EL1, + .field_pos =3D ID_AA64ISAR0_TLB_SHIFT, + .sign =3D FTR_UNSIGNED, + .min_field_value =3D ID_AA64ISAR0_TLBI_RANGE, + }, {}, }; =20 --=20 2.19.1