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=-15.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 B421AC432BE for ; Thu, 5 Aug 2021 17:23:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 96C8660F42 for ; Thu, 5 Aug 2021 17:23:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239710AbhHERXm (ORCPT ); Thu, 5 Aug 2021 13:23:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:50862 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230172AbhHERXj (ORCPT ); Thu, 5 Aug 2021 13:23:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E770661104; Thu, 5 Aug 2021 17:23:22 +0000 (UTC) Date: Thu, 5 Aug 2021 18:23:15 +0100 From: Catalin Marinas To: Anshuman Khandual 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 Subject: Re: [RFC V2 10/10] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Message-ID: <20210805172314.GF6719@arm.com> References: <1627281445-12445-1-git-send-email-anshuman.khandual@arm.com> <1627281445-12445-11-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1627281445-12445-11-git-send-email-anshuman.khandual@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. -- Catalin