From patchwork Wed Jul 14 02:21:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12375607 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 EAE04C11F66 for ; Wed, 14 Jul 2021 02:21:07 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6FCFB6128E for ; Wed, 14 Jul 2021 02:21:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6FCFB6128E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 959376B0088; Tue, 13 Jul 2021 22:21:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 909866B008C; Tue, 13 Jul 2021 22:21:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7D0B86B0092; Tue, 13 Jul 2021 22:21:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0125.hostedemail.com [216.40.44.125]) by kanga.kvack.org (Postfix) with ESMTP id 556B06B0088 for ; Tue, 13 Jul 2021 22:21:07 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 46731185726F1 for ; Wed, 14 Jul 2021 02:21:06 +0000 (UTC) X-FDA: 78359590932.17.3CEFAF2 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf04.hostedemail.com (Postfix) with ESMTP id B779050000A5 for ; Wed, 14 Jul 2021 02:21:05 +0000 (UTC) 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 B5BD61FB; Tue, 13 Jul 2021 19:21:04 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.65.222]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 51EE53F7D8; Tue, 13 Jul 2021 19:21:01 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, 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 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Date: Wed, 14 Jul 2021 07:51:21 +0530 Message-Id: <1626229291-6569-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 Authentication-Results: imf04.hostedemail.com; dkim=none; spf=pass (imf04.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com; dmarc=pass (policy=none) header.from=arm.com X-Rspamd-Server: rspam02 X-Stat-Signature: 64rka4f6mhjcx41etpuexa1du3qwfzum X-Rspamd-Queue-Id: B779050000A5 X-HE-Tag: 1626229265-655693 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: This series enables 52 bits PA support for 4K and 16K page configs via existing CONFIG_ARM64_PA_BITS_52, utilizing a new arch feature FEAT_LPA2 which is available from ARM v8.7. IDMAP needs changes to accommodate two new level of page tables in certain scenarios like (4K|39VA|52PA) but the same problem also exists for (16K|36VA|48PA) which needs fixing. I am currently working on the IDMAP fix for 16K and later will enable it for FEAT_LPA2 as well. This series applies on v5.14-rc1. Testing: Build and boot tested (individual patches) on all existing and new FEAT_LPA2 enabled config combinations. Pending: - Enable IDMAP for FEAT_LPA2 - Enable 52 bit VA range on 4K/16K page sizes - Evaluate KVM and SMMU impacts from FEAT_LPA2 Anshuman Khandual (10): mm/mmap: Dynamically initialize protection_map[] arm64/mm: Consolidate TCR_EL1 fields arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2] arm64/mm: Add FEAT_LPA2 specific encoding arm64/mm: Detect and enable FEAT_LPA2 arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES arch/arm64/Kconfig | 9 +++++- arch/arm64/include/asm/assembler.h | 48 ++++++++++++++++++++++------ arch/arm64/include/asm/kernel-pgtable.h | 4 +-- arch/arm64/include/asm/memory.h | 1 + arch/arm64/include/asm/pgtable-hwdef.h | 28 ++++++++++++++--- arch/arm64/include/asm/pgtable.h | 18 +++++++++-- arch/arm64/include/asm/sysreg.h | 9 +++--- arch/arm64/kernel/head.S | 55 ++++++++++++++++++++++++++------- arch/arm64/mm/mmu.c | 3 ++ arch/arm64/mm/pgd.c | 2 +- arch/arm64/mm/proc.S | 11 ++++++- arch/arm64/mm/ptdump.c | 26 ++++++++++++++-- mm/mmap.c | 26 +++++++++++++--- 13 files changed, 195 insertions(+), 45 deletions(-)