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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 49FD5C3DA59 for ; Tue, 16 Jul 2024 11:03:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=DXE/6X1jhl+6ZWWRcxfWs1ZeV2tV7pd7h15S+NDxfsg=; b=0G5hQbaduImb7+6DggolYBFLJH 8VcdmfqHNjvfb5bciMiRDS9hRl6buEyPw076j2QYoKuoWIa80O+yCDMhYcjdKLayX2uxZ3WtLY3xb wvxZsBaC0LtGPErYRzcnmS4m64UR+S+b+fEkYONf8+qVCAjN0wVitxkH5CHAl6McwnI0bcTHWYcRC OAvRVGw5E3OtNGpBP5h8tVpgDW6wmK7+bJ9dOUbsCfB9QxRoDH+gmpvKGZDDg5YLJjyml4XxjI84p 6FoleKezAAv8ws8rM+ZBtNCPo30BYqqwt9ynIPBq6l/JNg+sAkZVjcLeYUFzVfAHSQTOoyvgNrCoB 6YgnIV3w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sTfxV-0000000A8At-2VPj; Tue, 16 Jul 2024 11:03:01 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sTfxB-0000000A87g-3XSP for linux-arm-kernel@lists.infradead.org; Tue, 16 Jul 2024 11:02:43 +0000 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 5A4621063; Tue, 16 Jul 2024 04:03:06 -0700 (PDT) Received: from [10.163.52.225] (unknown [10.163.52.225]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9DDED3F73F; Tue, 16 Jul 2024 04:02:32 -0700 (PDT) Message-ID: <87eba7de-b267-49ad-92fe-dcf3638b75d9@arm.com> Date: Tue, 16 Jul 2024 16:32:29 +0530 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-US From: Anshuman Khandual In-Reply-To: <20240503130147.1154804-23-joey.gouly@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240716_040241_963818_38B085D9 X-CRM114-Status: GOOD ( 14.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/3/24 18:31, 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 Reviewed-by: Anshuman Khandual > --- > 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" Agree with Kevin regarding need for an empty line here. > +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