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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B619C2BD09 for ; Tue, 9 Jul 2024 13:08:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BE2846B00A3; Tue, 9 Jul 2024 09:08:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B6BFE6B00A4; Tue, 9 Jul 2024 09:08:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A33E66B00A5; Tue, 9 Jul 2024 09:08:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 7EFA86B00A3 for ; Tue, 9 Jul 2024 09:08:53 -0400 (EDT) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id D97E21C376E for ; Tue, 9 Jul 2024 13:08:52 +0000 (UTC) X-FDA: 82320244104.01.9FBB42C Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf24.hostedemail.com (Postfix) with ESMTP id 0A5C4180032 for ; Tue, 9 Jul 2024 13:08:50 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=none; spf=pass (imf24.hostedemail.com: domain of kevin.brodsky@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=kevin.brodsky@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1720530515; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=u1JFUAH2d4XcdHVGTR45AMfUHAJV+cWFW8aJeEBGRHw=; b=o/ORUQxGt/1iQZlSgrTFEFs461AFMdC/Rf1gx+KTEfuQMRxj8wVz2fM/VDUZlC8b0pLcWC FsY7vlzux+DQUG9PC9jwe7HX35mHLGO1rrSwRDJdsXZx4EcZeL4sqYCEuLX6rBZGZPPtZS MDLm3bF0JD4kHDYNUnOcsCqjCdhEDUg= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=none; spf=pass (imf24.hostedemail.com: domain of kevin.brodsky@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=kevin.brodsky@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1720530515; a=rsa-sha256; cv=none; b=ZTAN9yUCC+oO5EDBhloFaXoGcxHd3pn9neadeLXAK6oMhfA+PccWLCJVFEprpUwZ538F7v kXR7nU13YCNzdIs0y20jqCLqULnvNB5xQd+929eLrOmJwASGjqqx6XAoCygJ+xAneGEt53 NIwUiFovoV2rnnX8j6r12nUloLugv9U= 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 D281A1650; Tue, 9 Jul 2024 06:09:14 -0700 (PDT) Received: from [10.44.160.75] (e126510-lin.lund.arm.com [10.44.160.75]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6E8F63F766; Tue, 9 Jul 2024 06:08:43 -0700 (PDT) Message-ID: <87b5070e-c85c-4585-b223-e48e5556cbac@arm.com> Date: Tue, 9 Jul 2024 15:08:40 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 22/29] arm64: add Permission Overlay Extension Kconfig To: Joey Gouly , linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev References: <20240503130147.1154804-1-joey.gouly@arm.com> <20240503130147.1154804-23-joey.gouly@arm.com> Content-Language: en-GB From: Kevin Brodsky In-Reply-To: <20240503130147.1154804-23-joey.gouly@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 0A5C4180032 X-Stat-Signature: o3k5ibc3s8qo45guek8gsa385t5dj39i X-Rspam-User: X-HE-Tag: 1720530530-776849 X-HE-Meta: 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 ZP/Dabuv CKGwFBBVO3fm5a3EhAM5LxwMuXuy03KyEPLHlmvyy6ixvM8r4st+NpVxtUzUA/Bafa1rn2wUsv6LC6hzl9Doybti0wrxpoyFm94wBHzUomubB3s85A8CWUG/ZVygSRGLKF6FyNEd+/trBzs6r50iLnYgjafes85z3wy+9xyRWam7B/jrQ4EBmL+zNk/jaaGUnz34s/S3OIQrwlG9GBNVPSX5gdJZw7YiTOBTkm2X0/wsqndPlAEagpGlnoBrVYFp3vQFx4fNvspwy7uE= 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: List-Subscribe: List-Unsubscribe: On 03/05/2024 15:01, Joey Gouly wrote: > Now that support for POE and Protection Keys has been implemented, add a > config to allow users to actually enable it. > > Signed-off-by: Joey Gouly > Cc: Catalin Marinas > Cc: Will Deacon > --- > arch/arm64/Kconfig | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 7b11c98b3e84..676ebe4bf9eb 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -2095,6 +2095,28 @@ config ARM64_EPAN > if the cpu does not implement the feature. > endmenu # "ARMv8.7 architectural features" > > +menu "ARMv8.9 architectural features" Nit: empty line here to be consistent with other menu entries. Kevin > +config ARM64_POE > + prompt "Permission Overlay Extension" > + def_bool y > + select ARCH_USES_HIGH_VMA_FLAGS > + select ARCH_HAS_PKEYS > + help > + The Permission Overlay Extension is used to implement Memory > + Protection Keys. Memory Protection Keys provides a mechanism for > + enforcing page-based protections, but without requiring modification > + of the page tables when an application changes protection domains. > + > + For details, see Documentation/core-api/protection-keys.rst > + > + If unsure, say y. > + > +config ARCH_PKEY_BITS > + int > + default 3 > + > +endmenu # "ARMv8.9 architectural features" > + > config ARM64_SVE > bool "ARM Scalable Vector Extension support" > default y