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 29B99C433E0 for ; Fri, 5 Feb 2021 14:03:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4FA464FC9 for ; Fri, 5 Feb 2021 14:03:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230394AbhBEODP (ORCPT ); Fri, 5 Feb 2021 09:03:15 -0500 Received: from foss.arm.com ([217.140.110.172]:60344 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231575AbhBEN7P (ORCPT ); Fri, 5 Feb 2021 08:59:15 -0500 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 CE27331B; Fri, 5 Feb 2021 05:58:21 -0800 (PST) Received: from e112269-lin.arm.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 076A83F719; Fri, 5 Feb 2021 05:58:18 -0800 (PST) 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 v8 0/5] MTE support for KVM guest Date: Fri, 5 Feb 2021 13:57:58 +0000 Message-Id: <20210205135803.48321-1-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 Another round of updates following review comments from Marc (thanks!). This is rather late for v5.12, so I'll rebase again after -rc1 is out. This series adds support for using the Arm Memory Tagging Extensions (MTE) in a KVM guest. This version splits the change to the tag synchronisation out to it's own patch (patch 1), and also separates the introduction and exposing of KVM_ARM_CAP_MTE into two patches (2 and 4) to avoid a dependency problem with the save/restore patch (3). As before patch 5 is an RFC for adding a new ioctl for reading/writing tags (I would appreciate feedback!). Changes since v7[1]: * Split into hopefully more logic patches. * Save/restore of TFSRE0_EL1 is now done in C code. * Make save/restore of TFSR_EL1 conditional on the VM having MTE enabled. * Replaced register descriptions boilerplate in sys_regs.c with a new MTE_REG() macro. [1] https://lore.kernel.org/r/20210115152811.8398-1-steven.price%40arm.com Steven Price (5): 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 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 | 13 +++++ arch/arm64/kernel/asm-offsets.c | 3 + arch/arm64/kernel/mte.c | 16 ++++-- arch/arm64/kvm/arm.c | 66 ++++++++++++++++++++++ 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 | 16 ++++++ arch/arm64/kvm/sys_regs.c | 28 +++++++-- include/uapi/linux/kvm.h | 2 + 15 files changed, 246 insertions(+), 12 deletions(-) create mode 100644 arch/arm64/include/asm/kvm_mte.h -- 2.20.1