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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5E30FC433EF for ; Thu, 30 Sep 2021 10:35:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4764161884 for ; Thu, 30 Sep 2021 10:35:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350153AbhI3Kgv (ORCPT ); Thu, 30 Sep 2021 06:36:51 -0400 Received: from foss.arm.com ([217.140.110.172]:52138 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350087AbhI3Kgn (ORCPT ); Thu, 30 Sep 2021 06:36:43 -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 F3FCF113E; Thu, 30 Sep 2021 03:35:00 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.73.203]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C5A8A3F793; Thu, 30 Sep 2021 03:34:57 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: suzuki.poulose@arm.com, mark.rutland@arm.com, will@kernel.org, catalin.marinas@arm.com, maz@kernel.org, james.morse@arm.com, steven.price@arm.com, Anshuman Khandual Subject: [RFC V3 12/13] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Date: Thu, 30 Sep 2021 16:05:15 +0530 Message-Id: <1632998116-11552-13-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1632998116-11552-1-git-send-email-anshuman.khandual@arm.com> References: <1632998116-11552-1-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index f58ef62..926a802 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -948,17 +948,17 @@ config ARM64_PA_BITS_48 bool "48-bit" config ARM64_PA_BITS_52 - bool "52-bit (ARMv8.2)" - depends on ARM64_64K_PAGES + bool "52-bit" 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. + part of the ARMv8.2-LPA or ARMv8.7-LPA2 extension. With this enabled, the kernel will also continue to work on CPUs that - do not support ARMv8.2-LPA, but with some added memory overhead (and - minor performance overhead). + do not support ARMv8.2-LPA or ARMv8.7-LPA2, but with some added memory + overhead (and minor performance overhead). endchoice -- 2.7.4