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=-3.8 required=3.0 tests=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 55F6EC433FF for ; Fri, 2 Aug 2019 14:51:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 319372171F for ; Fri, 2 Aug 2019 14:51:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2395040AbfHBOud (ORCPT ); Fri, 2 Aug 2019 10:50:33 -0400 Received: from foss.arm.com ([217.140.110.172]:53178 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731205AbfHBOuc (ORCPT ); Fri, 2 Aug 2019 10:50:32 -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 C9FD11596; Fri, 2 Aug 2019 07:50:29 -0700 (PDT) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.133]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E2E0B3F575; Fri, 2 Aug 2019 07:50:27 -0700 (PDT) From: Steven Price Cc: Steven Price , Catalin Marinas , Marc Zyngier , Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Russell King , Will Deacon , James Morse , Julien Thierry , Suzuki K Pouloze , kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/9] arm64: Stolen time support Date: Fri, 2 Aug 2019 15:50:08 +0100 Message-Id: <20190802145017.42543-1-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit To: unlisted-recipients:; (no To-header on input) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This series add support for paravirtualized time for arm64 guests and KVM hosts following the specification in Arm's document DEN 0057A: https://developer.arm.com/docs/den0057/a It implements support for stolen time, allowing the guest to identify time when it is forcibly not executing. It doesn't implement support for Live Physical Time (LPT) as there are some concerns about the overheads and approach in the above specification, and I expect an updated version of the specification to be released soon with just the stolen time parts. I previously posted a series including LPT (as well as stolen time): https://lore.kernel.org/kvmarm/20181212150226.38051-1-steven.price@arm.com/ Patches 2, 5, 7 and 8 are cleanup patches and could be taken separately. Christoffer Dall (1): KVM: arm/arm64: Factor out hypercall handling from PSCI code Steven Price (8): KVM: arm64: Document PV-time interface KVM: arm64: Implement PV_FEATURES call KVM: arm64: Support stolen time reporting via shared structure KVM: Allow kvm_device_ops to be const KVM: arm64: Provide a PV_TIME device to user space arm/arm64: Provide a wrapper for SMCCC 1.1 calls arm/arm64: Make use of the SMCCC 1.1 wrapper arm64: Retrieve stolen time as paravirtualized guest Documentation/virtual/kvm/arm/pvtime.txt | 107 +++++++++++++ arch/arm/kvm/Makefile | 2 +- arch/arm/kvm/handle_exit.c | 2 +- arch/arm/mm/proc-v7-bugs.c | 13 +- arch/arm64/include/asm/kvm_host.h | 13 +- arch/arm64/include/asm/kvm_mmu.h | 2 + arch/arm64/include/asm/pvclock-abi.h | 20 +++ arch/arm64/include/uapi/asm/kvm.h | 6 + arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/cpu_errata.c | 80 ++++------ arch/arm64/kernel/kvm.c | 155 ++++++++++++++++++ arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/Makefile | 2 + arch/arm64/kvm/handle_exit.c | 4 +- include/kvm/arm_hypercalls.h | 44 ++++++ include/kvm/arm_psci.h | 2 +- include/linux/arm-smccc.h | 58 +++++++ include/linux/cpuhotplug.h | 1 + include/linux/kvm_host.h | 4 +- include/linux/kvm_types.h | 2 + include/uapi/linux/kvm.h | 2 + virt/kvm/arm/arm.c | 18 +++ virt/kvm/arm/hypercalls.c | 138 ++++++++++++++++ virt/kvm/arm/mmu.c | 44 ++++++ virt/kvm/arm/psci.c | 84 +--------- virt/kvm/arm/pvtime.c | 190 +++++++++++++++++++++++ virt/kvm/kvm_main.c | 6 +- 27 files changed, 848 insertions(+), 153 deletions(-) create mode 100644 Documentation/virtual/kvm/arm/pvtime.txt create mode 100644 arch/arm64/include/asm/pvclock-abi.h create mode 100644 arch/arm64/kernel/kvm.c create mode 100644 include/kvm/arm_hypercalls.h create mode 100644 virt/kvm/arm/hypercalls.c create mode 100644 virt/kvm/arm/pvtime.c -- 2.20.1