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=-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 4725BC43460 for ; Fri, 16 Apr 2021 15:43:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 22AE7613C1 for ; Fri, 16 Apr 2021 15:43:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234894AbhDPPny (ORCPT ); Fri, 16 Apr 2021 11:43:54 -0400 Received: from foss.arm.com ([217.140.110.172]:44518 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234654AbhDPPnr (ORCPT ); Fri, 16 Apr 2021 11:43:47 -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 4AAD311B3; Fri, 16 Apr 2021 08:43:22 -0700 (PDT) Received: from e112269-lin.arm.com (autoplooker.cambridge.arm.com [10.1.194.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7F0DD3F99C; Fri, 16 Apr 2021 08:43:19 -0700 (PDT) From: Steven Price To: Catalin Marinas , Marc Zyngier , Will Deacon Cc: Steven Price , James Morse , Julien Thierry , Suzuki K Poulose , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Dave Martin , Mark Rutland , Thomas Gleixner , qemu-devel@nongnu.org, Juan Quintela , "Dr. David Alan Gilbert" , Richard Henderson , Peter Maydell , Haibo Xu , Andrew Jones Subject: [PATCH v11 0/6] MTE support for KVM guest Date: Fri, 16 Apr 2021 16:43:03 +0100 Message-Id: <20210416154309.22129-1-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I know it's likely to be the merge window next week, but since there were a couple of changes from Catalin's review I thought I'd send another version out - there are some minor conflicts with what's currently in -next so I'll rebase after -rc1. This series adds support for using the Arm Memory Tagging Extensions (MTE) in a KVM guest. This version is rebased on v5.12-rc2. Changes since v10[1]: * Replace pte_valid_user() with (pte_val(pte) & PTE_USER) in set_pte_at() as the former has been removed with the EPAN patches. * Don't attempt to check tags on memory which is going to be mapped in stage 2 as DEVICE as the guest won't be able to see the tags. * Use pfn_to_online_page() instead of pfn_to_page() in user_mem_abort() to prevent ZONE_DEVICE memory being populated in stage 2 if tags are enabled. [1] https://lore.kernel.org/r/20210312151902.17853-1-steven.price%40arm.com Steven Price (6): arm64: mte: Sync tags for pages where PTE is untagged arm64: kvm: Introduce MTE VM feature arm64: kvm: Save/restore MTE registers arm64: kvm: Expose KVM_ARM_CAP_MTE KVM: arm64: ioctl to fetch/store tags in a guest KVM: arm64: Document MTE capability and ioctl Documentation/virt/kvm/api.rst | 53 +++++++++++++++ arch/arm64/include/asm/kvm_emulate.h | 3 + arch/arm64/include/asm/kvm_host.h | 9 +++ arch/arm64/include/asm/kvm_mte.h | 66 ++++++++++++++++++ arch/arm64/include/asm/pgtable.h | 2 +- arch/arm64/include/asm/sysreg.h | 3 +- arch/arm64/include/uapi/asm/kvm.h | 14 ++++ arch/arm64/kernel/asm-offsets.c | 3 + arch/arm64/kernel/mte.c | 16 +++-- arch/arm64/kvm/arm.c | 78 ++++++++++++++++++++++ arch/arm64/kvm/hyp/entry.S | 7 ++ arch/arm64/kvm/hyp/exception.c | 3 +- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 21 ++++++ arch/arm64/kvm/mmu.c | 20 ++++++ arch/arm64/kvm/sys_regs.c | 28 ++++++-- include/uapi/linux/kvm.h | 2 + 16 files changed, 317 insertions(+), 11 deletions(-) create mode 100644 arch/arm64/include/asm/kvm_mte.h -- 2.20.1