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From: Steven Price <steven.price@arm.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-doc@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
	Steven Price <steven.price@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Marc Zyngier <maz@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Will Deacon <will@kernel.org>,
	kvmarm@lists.cs.columbia.edu
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> (raw)

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

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Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02 14:50 Steven Price [this message]
2019-08-02 14:50 ` [PATCH 1/9] KVM: arm64: Document PV-time interface Steven Price
2019-08-03 11:13   ` Marc Zyngier
2019-08-05 13:06     ` Steven Price
2019-08-05  3:23   ` Zenghui Yu
2019-08-05 13:06     ` Steven Price
2019-08-05 16:40   ` Christophe de Dinechin
2019-08-07 13:21     ` Steven Price
2019-08-07 14:28       ` Christophe de Dinechin
2019-08-07 15:26         ` Steven Price
2019-08-02 14:50 ` [PATCH 2/9] KVM: arm/arm64: Factor out hypercall handling from PSCI code Steven Price
2019-08-02 14:50 ` [PATCH 3/9] KVM: arm64: Implement PV_FEATURES call Steven Price
2019-08-03 11:21   ` Marc Zyngier
2019-08-05 13:14     ` Steven Price
2019-08-02 14:50 ` [PATCH 4/9] KVM: arm64: Support stolen time reporting via shared structure Steven Price
2019-08-03 11:55   ` Marc Zyngier
2019-08-05 14:09     ` Steven Price
2019-08-03 17:58   ` Marc Zyngier
2019-08-03 18:13     ` Marc Zyngier
2019-08-05 14:18       ` Steven Price
2019-08-02 14:50 ` [PATCH 5/9] KVM: Allow kvm_device_ops to be const Steven Price
2019-08-02 14:50 ` [PATCH 6/9] KVM: arm64: Provide a PV_TIME device to user space Steven Price
2019-08-03 12:51   ` Marc Zyngier
2019-08-03 17:34     ` Marc Zyngier
2019-08-07 13:39       ` Steven Price
2019-08-07 13:51         ` Marc Zyngier
2019-08-05 16:10     ` Steven Price
2019-08-05 16:28       ` Marc Zyngier
2019-08-02 14:50 ` [PATCH 7/9] arm/arm64: Provide a wrapper for SMCCC 1.1 calls Steven Price
2019-08-05 10:03   ` Will Deacon
2019-08-02 14:50 ` [PATCH 8/9] arm/arm64: Make use of the SMCCC 1.1 wrapper Steven Price
2019-08-02 14:50 ` [PATCH 9/9] arm64: Retrieve stolen time as paravirtualized guest Steven Price
2019-08-04  9:53   ` Marc Zyngier
2019-08-08 15:29     ` Steven Price
2019-08-08 15:49       ` Marc Zyngier
2019-08-09 13:51   ` Zenghui Yu
2019-08-12 10:39     ` Steven Price
2019-08-13  6:06       ` Zenghui Yu
2019-08-03 18:05 ` [PATCH 0/9] arm64: Stolen time support Marc Zyngier
2019-08-05 13:06   ` Steven Price
2019-08-05 13:26     ` Marc Zyngier
2019-08-14 13:02     ` Alexander Graf
2019-08-14 14:19       ` Marc Zyngier
2019-08-14 14:52         ` [UNVERIFIED SENDER] " Alexander Graf
2019-08-16 10:23           ` Steven Price

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