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 6E48AC433FE for ; Thu, 30 Sep 2021 10:34:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 577DD61884 for ; Thu, 30 Sep 2021 10:34:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350034AbhI3KgG (ORCPT ); Thu, 30 Sep 2021 06:36:06 -0400 Received: from foss.arm.com ([217.140.110.172]:52018 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350027AbhI3Kf6 (ORCPT ); Thu, 30 Sep 2021 06:35:58 -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 F0419106F; Thu, 30 Sep 2021 03:34:15 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.73.203]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C291D3F793; Thu, 30 Sep 2021 03:34:12 -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 00/13] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Date: Thu, 30 Sep 2021 16:05:03 +0530 Message-Id: <1632998116-11552-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 v5.15-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/all/1632807225-20189-1-git-send-email-anshuman.khandual@arm.com/ Changes in RFC V3: - protection_map[] gets reinitialized in platform to avoid build failure per Catalin - Added __cpu_secondary_check52bitpa() - Added FEAT_LPA2 support during KVM stage-2 translation - Updated description for ARM64_PA_BITS_52 per Catalin - Added tags from last version Changes in RFC V2: https://lore.kernel.org/all/1627281445-12445-1-git-send-email-anshuman.khandual@arm.com/ - 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 (13): arm64/mm: 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 VTCR_EL2.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 __cpu_secondary_check52bitpa() 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 KVM: arm64: Enable FEAT_LPA2 based 52 bits IPA size on 4K and 16K arch/arm64/Kconfig | 17 +++++++---- arch/arm64/include/asm/assembler.h | 42 +++++++++++++++++++++------ arch/arm64/include/asm/kernel-pgtable.h | 4 +-- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/include/asm/kvm_pgtable.h | 10 ++++++- arch/arm64/include/asm/memory.h | 1 + arch/arm64/include/asm/pgtable-hwdef.h | 28 ++++++++++++++---- arch/arm64/include/asm/pgtable-prot.h | 34 +++++++++++----------- arch/arm64/include/asm/pgtable.h | 18 ++++++++++-- arch/arm64/include/asm/smp.h | 1 + arch/arm64/include/asm/sysreg.h | 9 +++--- arch/arm64/kernel/head.S | 51 +++++++++++++++++++++++++++++++++ arch/arm64/kernel/smp.c | 2 ++ arch/arm64/kvm/hyp/pgtable.c | 25 ++++++++++++++-- arch/arm64/kvm/reset.c | 14 ++++++--- arch/arm64/mm/init.c | 22 ++++++++++++++ arch/arm64/mm/mmu.c | 3 ++ arch/arm64/mm/pgd.c | 2 +- arch/arm64/mm/proc.S | 11 ++++++- arch/arm64/mm/ptdump.c | 26 +++++++++++++++-- 20 files changed, 265 insertions(+), 56 deletions(-) -- 2.7.4