From patchwork Fri Apr 16 15:43:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 12208047 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 BD241C43460 for ; Fri, 16 Apr 2021 15:46:05 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 6BB8A613B0 for ; Fri, 16 Apr 2021 15:46:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6BB8A613B0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:42594 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXQfS-0007NJ-LE for qemu-devel@archiver.kernel.org; Fri, 16 Apr 2021 11:46:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35396) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXQd2-0005lr-Tk for qemu-devel@nongnu.org; Fri, 16 Apr 2021 11:43:34 -0400 Received: from foss.arm.com ([217.140.110.172]:37176) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXQcv-0005nm-67 for qemu-devel@nongnu.org; Fri, 16 Apr 2021 11:43:28 -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 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 Received-SPF: pass client-ip=217.140.110.172; envelope-from=steven.price@arm.com; helo=foss.arm.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Peter Maydell , "Dr. David Alan Gilbert" , Andrew Jones , Haibo Xu , Suzuki K Poulose , qemu-devel@nongnu.org, Dave Martin , Juan Quintela , Richard Henderson , linux-kernel@vger.kernel.org, Steven Price , James Morse , Julien Thierry , Thomas Gleixner , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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