From patchwork Mon Mar 1 14:23:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 12109815 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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 11973C433E9 for ; Mon, 1 Mar 2021 14:25:13 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 C5E5864DF1 for ; Mon, 1 Mar 2021 14:25:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5E5864DF1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=wNIOM+Y9HD/p2YTvlTr15xlzGo4FA1DjoHPiIlRmWVo=; b=lpvid6rBSWF3uvdVbj7pAGjFHM QW0bDki1BA8RSaSFNIqV/KTMq7oIhszpUBNDIVbCB6arNAzG04Y6LJRnzxkSbzZon3zu72pExXE4X tyrvMCklEFfhVWCDwAOPgAHWImj1F2tkZ14rKvWynmUEta1t6W6B8u35tyUCGBsXYgjJZtvL9qVVJ 7udb9Y3fR1ptC6XEIvFpeC3z1jsNAZWQBHGnNXSHUCaGnix4oZv9/KV8U1bjUYdFx8335b0hZPG0K G2yVg6/mvBT7b90XJStzvj1M1JwzxxGo/dfDyrnZGazo2aS88vaIvCHgM9QY3L0kx6tw71bHGEziX spTeH4uA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lGjSc-00079J-Tq; Mon, 01 Mar 2021 14:23:46 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lGjSW-00077N-W0 for linux-arm-kernel@lists.infradead.org; Mon, 01 Mar 2021 14:23:42 +0000 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 440931042; Mon, 1 Mar 2021 06:23:33 -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 7C1183F70D; Mon, 1 Mar 2021 06:23:30 -0800 (PST) From: Steven Price To: Catalin Marinas , Marc Zyngier , Will Deacon Subject: [PATCH v9 0/6] MTE support for KVM guest Date: Mon, 1 Mar 2021 14:23:09 +0000 Message-Id: <20210301142315.30920-1-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210301_092341_111982_55D18C7E X-CRM114-Status: GOOD ( 13.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series adds support for using the Arm Memory Tagging Extensions (MTE) in a KVM guest. This version is rebased on v5.12-rc1 and added a documentation patch, but is otherwise unchanged from the v8[1] posting. Changes since v8[1]: * Rebased on v5.12-rc1 (note new CAP number) * New documentation patch [1] https://lore.kernel.org/r/20210205135803.48321-1-steven.price@arm.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 | 37 ++++++++++++ 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 + 16 files changed, 283 insertions(+), 12 deletions(-) create mode 100644 arch/arm64/include/asm/kvm_mte.h