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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 5B3BBC2D0A3 for ; Mon, 26 Oct 2020 15:58:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D7D9217A0 for ; Mon, 26 Oct 2020 15:58:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1784585AbgJZP6O (ORCPT ); Mon, 26 Oct 2020 11:58:14 -0400 Received: from foss.arm.com ([217.140.110.172]:43202 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1784567AbgJZP5k (ORCPT ); Mon, 26 Oct 2020 11:57:40 -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 0E5F11042; Mon, 26 Oct 2020 08:57:40 -0700 (PDT) Received: from e112269-lin.arm.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7EC673F719; Mon, 26 Oct 2020 08:57:37 -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 v4 0/2] MTE support for KVM guest Date: Mon, 26 Oct 2020 15:57:25 +0000 Message-Id: <20201026155727.36685-1-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 This series adds support for Arm's Memory Tagging Extension (MTE) to KVM, allowing KVM guests to make use of it. This builds on the existing user space support already in v5.10-rc1, see [1] for an overview. [1] https://lwn.net/Articles/834289/ Changes since v3[2]: * Rebased on v5.10-rc1 (required updating KVM_CAP number). * Clarified redundant test for system_supports_mte() with a comment. * Added Reviewed-by tags from Andrew - thanks! [2] https://lore.kernel.org/r/20200925093607.3051-1-steven.price%40arm.com Haibo plans to start looking at the QEMU support for this. I believe what is in this series should be sufficient, but there is still some concern that we need more kernel support for easily accessing the tags for migrating the VM. I don't expect any extra support to change the interfaces defined here, but rather build on them. My only reservation would be whether we want to expose the KVM_CAP before everything is ready. Steven Price (2): arm64: kvm: Save/restore MTE registers arm64: kvm: Introduce MTE VCPU feature arch/arm64/include/asm/kvm_emulate.h | 3 +++ arch/arm64/include/asm/kvm_host.h | 7 +++++++ arch/arm64/include/asm/sysreg.h | 3 ++- arch/arm64/kvm/arm.c | 9 +++++++++ arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 14 ++++++++++++++ arch/arm64/kvm/mmu.c | 20 ++++++++++++++++++++ arch/arm64/kvm/sys_regs.c | 20 +++++++++++++++----- include/uapi/linux/kvm.h | 1 + 8 files changed, 71 insertions(+), 6 deletions(-) -- 2.20.1