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=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 0B32BC4320A for ; Thu, 12 Aug 2021 09:12:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDD4260F00 for ; Thu, 12 Aug 2021 09:12:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234859AbhHLJNL (ORCPT ); Thu, 12 Aug 2021 05:13:11 -0400 Received: from foss.arm.com ([217.140.110.172]:40576 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231392AbhHLJNK (ORCPT ); Thu, 12 Aug 2021 05:13:10 -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 D29711FB; Thu, 12 Aug 2021 02:12:44 -0700 (PDT) Received: from [10.163.68.17] (unknown [10.163.68.17]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DA3543F718; Thu, 12 Aug 2021 02:12:39 -0700 (PDT) From: Anshuman Khandual Subject: Re: [RFC V2 10/10] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES To: Catalin Marinas Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, suzuki.poulose@arm.com, mark.rutland@arm.com, will@kernel.org, maz@kernel.org, james.morse@arm.com, steven.price@arm.com References: <1627281445-12445-1-git-send-email-anshuman.khandual@arm.com> <1627281445-12445-11-git-send-email-anshuman.khandual@arm.com> <20210805172314.GF6719@arm.com> Message-ID: Date: Thu, 12 Aug 2021 14:43:32 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210805172314.GF6719@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/5/21 10:53 PM, Catalin Marinas wrote: > On Mon, Jul 26, 2021 at 12:07:25PM +0530, Anshuman Khandual wrote: >> All required FEAT_LPA2 components for 52 bit PA range are already in place. >> Just enable CONFIG_ARM64_PA_BITS_52 on 4K and 16K pages which would select >> CONFIG_ARM64_PA_BITS_52_LPA2 activating 52 bit PA range via FEAT_LPA2. >> >> Signed-off-by: Anshuman Khandual >> --- >> arch/arm64/Kconfig | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index 1999ac6..ce139415 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -952,9 +952,9 @@ config ARM64_PA_BITS_48 >> >> config ARM64_PA_BITS_52 >> bool "52-bit (ARMv8.2)" >> - depends on ARM64_64K_PAGES >> depends on ARM64_PAN || !ARM64_SW_TTBR0_PAN >> select ARM64_PA_BITS_52_LPA if ARM64_64K_PAGES >> + select ARM64_PA_BITS_52_LPA2 if (ARM64_4K_PAGES || ARM64_16K_PAGES) >> help >> Enable support for a 52-bit physical address space, introduced as >> part of the ARMv8.2-LPA extension. > > If you do it this way, the text here needs updating and the 8.2 > architecture version removed. Sure, will update as required.