From patchwork Mon Jul 26 06:37:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12398585 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=-12.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 1D4F0C4338F for ; Mon, 26 Jul 2021 07:03:14 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id DD253604DC for ; Mon, 26 Jul 2021 07:03:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org DD253604DC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=DrHxqwBIDk5989Tc3SH2JGFGF/K0fYhUy778CdEBKmA=; b=fHPQfxrCplXsyR Oqm9AO3urhhDQpul+4Q8uckz++WNQ25OZacFytSl/cghISyjJ5wVeJbmskE4Zak+E7Ni+ddz9NSBd p7sZRnmsNeDV1Nt/GMAABE/v1jbQxnZAz00s9Er3+ypZ6bCt92sIMxRcwhkzZME4NQg3PR4sH7YUZ GEI8lU6+BaOck2rFabPdT4YDlSBP3KaUMmxXyXLVTSeVBmqFpSQ2VcGifpkrqq+m2yg1hWbyX8nBd Z81K1d+VaD899iOEUZ25S6NTsoMmyddT6UaAjpDyAHi2gc2v/yCXfE2xceG4QJW9le5QrUOebKgN/ hN4RSEPXF8vn9o32ZH2g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m7uEV-009iVt-9Z; Mon, 26 Jul 2021 06:36:59 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m7uEQ-009iTo-OB for linux-arm-kernel@lists.infradead.org; Mon, 26 Jul 2021 06:36:56 +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 75927106F; Sun, 25 Jul 2021 23:36:48 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.66.17]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 70E7A3F66F; Sun, 25 Jul 2021 23:36:44 -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 V2 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Date: Mon, 26 Jul 2021 12:07:15 +0530 Message-Id: <1627281445-12445-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210725_233654_878120_84D025CD X-CRM114-Status: GOOD ( 10.80 ) 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 have sent a fix for 16K case [1] and later will enable it for FEAT_LPA2 as well. This series applies on v5.14-rc3. 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 [1] https://lore.kernel.org/lkml/1627019894-14819-1-git-send-email-anshuman.khandual@arm.com/ Changes in RFC V2: - Changed FEAT_LPA2 presence qualifying criteria wrt ID_AA64MMFR0_TGRAN_LPA2 - Changed FEAT_LPA2 specific encoding which drops the additional tmp variable - Fixed [phys|pte]_to_[pte|phys]() helpers when FEAT_LPA2 is implemented Changes in RFC V1: https://lore.kernel.org/lkml/1626229291-6569-1-git-send-email-anshuman.khandual@arm.com/ 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 | 42 ++++++++++++++++++++++++++------- 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 | 30 +++++++++++++++++++++++ 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, 177 insertions(+), 32 deletions(-)