From: Steven Price <steven.price@arm.com>
To: Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Cc: "Steven Price" <steven.price@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Russell King" <linux@armlinux.org.uk>,
"James Morse" <james.morse@arm.com>,
"Julien Thierry" <julien.thierry.kdev@gmail.com>,
"Suzuki K Pouloze" <suzuki.poulose@arm.com>,
"Mark Rutland" <mark.rutland@arm.com>,
kvm@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/9] arm64: Stolen time support
Date: Mon, 19 Aug 2019 15:04:27 +0100 [thread overview]
Message-ID: <20190819140436.12207-1-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.
NOTE: Patches 7 and 8 will conflict with Mark Rutland's series[1] cleaning
up the SMCCC conduit. I do feel that the addition of an _invoke() call
makes a number of call sites cleaner and it should be possible to
integrate both this and Mark's other cleanups.
[1] https://lore.kernel.org/linux-arm-kernel/20190809132245.43505-1-mark.rutland@arm.com/
Changes from v1:
https://lore.kernel.org/lkml/20190802145017.42543-1-steven.price@arm.com/
* Host kernel no longer allocates the stolen time structure, instead it
is allocated by user space. This means the save/restore functionality
can be removed.
* Refactored the code so arm has stub implementations and to avoid
initcall
* Rebased to pick up Documentation/{virt->virtual} change
* Bunch of typo fixes
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/virt/kvm/arm/pvtime.txt | 100 +++++++++++++
arch/arm/include/asm/kvm_host.h | 21 +++
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 | 19 ++-
arch/arm64/include/asm/paravirt.h | 9 +-
arch/arm64/include/asm/pvclock-abi.h | 17 +++
arch/arm64/include/uapi/asm/kvm.h | 8 ++
arch/arm64/kernel/cpu_errata.c | 80 ++++-------
arch/arm64/kernel/paravirt.c | 147 +++++++++++++++++++
arch/arm64/kernel/time.c | 3 +
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/Makefile | 2 +
arch/arm64/kvm/handle_exit.c | 4 +-
include/kvm/arm_hypercalls.h | 43 ++++++
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 | 20 +++
virt/kvm/arm/hypercalls.c | 68 +++++++++
virt/kvm/arm/psci.c | 84 +----------
virt/kvm/arm/pvtime.c | 194 ++++++++++++++++++++++++++
virt/kvm/kvm_main.c | 6 +-
27 files changed, 758 insertions(+), 154 deletions(-)
create mode 100644 Documentation/virt/kvm/arm/pvtime.txt
create mode 100644 arch/arm64/include/asm/pvclock-abi.h
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
WARNING: multiple messages have this Message-ID (diff)
From: Steven Price <steven.price@arm.com>
To: Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
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>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: [PATCH v2 0/9] arm64: Stolen time support
Date: Mon, 19 Aug 2019 15:04:27 +0100 [thread overview]
Message-ID: <20190819140436.12207-1-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.
NOTE: Patches 7 and 8 will conflict with Mark Rutland's series[1] cleaning
up the SMCCC conduit. I do feel that the addition of an _invoke() call
makes a number of call sites cleaner and it should be possible to
integrate both this and Mark's other cleanups.
[1] https://lore.kernel.org/linux-arm-kernel/20190809132245.43505-1-mark.rutland@arm.com/
Changes from v1:
https://lore.kernel.org/lkml/20190802145017.42543-1-steven.price@arm.com/
* Host kernel no longer allocates the stolen time structure, instead it
is allocated by user space. This means the save/restore functionality
can be removed.
* Refactored the code so arm has stub implementations and to avoid
initcall
* Rebased to pick up Documentation/{virt->virtual} change
* Bunch of typo fixes
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/virt/kvm/arm/pvtime.txt | 100 +++++++++++++
arch/arm/include/asm/kvm_host.h | 21 +++
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 | 19 ++-
arch/arm64/include/asm/paravirt.h | 9 +-
arch/arm64/include/asm/pvclock-abi.h | 17 +++
arch/arm64/include/uapi/asm/kvm.h | 8 ++
arch/arm64/kernel/cpu_errata.c | 80 ++++-------
arch/arm64/kernel/paravirt.c | 147 +++++++++++++++++++
arch/arm64/kernel/time.c | 3 +
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/Makefile | 2 +
arch/arm64/kvm/handle_exit.c | 4 +-
include/kvm/arm_hypercalls.h | 43 ++++++
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 | 20 +++
virt/kvm/arm/hypercalls.c | 68 +++++++++
virt/kvm/arm/psci.c | 84 +----------
virt/kvm/arm/pvtime.c | 194 ++++++++++++++++++++++++++
virt/kvm/kvm_main.c | 6 +-
27 files changed, 758 insertions(+), 154 deletions(-)
create mode 100644 Documentation/virt/kvm/arm/pvtime.txt
create mode 100644 arch/arm64/include/asm/pvclock-abi.h
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
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Steven Price <steven.price@arm.com>
To: Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Cc: "Mark Rutland" <mark.rutland@arm.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Suzuki K Pouloze" <suzuki.poulose@arm.com>,
linux-doc@vger.kernel.org, "Russell King" <linux@armlinux.org.uk>,
"Steven Price" <steven.price@arm.com>,
"James Morse" <james.morse@arm.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Julien Thierry" <julien.thierry.kdev@gmail.com>
Subject: [PATCH v2 0/9] arm64: Stolen time support
Date: Mon, 19 Aug 2019 15:04:27 +0100 [thread overview]
Message-ID: <20190819140436.12207-1-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.
NOTE: Patches 7 and 8 will conflict with Mark Rutland's series[1] cleaning
up the SMCCC conduit. I do feel that the addition of an _invoke() call
makes a number of call sites cleaner and it should be possible to
integrate both this and Mark's other cleanups.
[1] https://lore.kernel.org/linux-arm-kernel/20190809132245.43505-1-mark.rutland@arm.com/
Changes from v1:
https://lore.kernel.org/lkml/20190802145017.42543-1-steven.price@arm.com/
* Host kernel no longer allocates the stolen time structure, instead it
is allocated by user space. This means the save/restore functionality
can be removed.
* Refactored the code so arm has stub implementations and to avoid
initcall
* Rebased to pick up Documentation/{virt->virtual} change
* Bunch of typo fixes
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/virt/kvm/arm/pvtime.txt | 100 +++++++++++++
arch/arm/include/asm/kvm_host.h | 21 +++
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 | 19 ++-
arch/arm64/include/asm/paravirt.h | 9 +-
arch/arm64/include/asm/pvclock-abi.h | 17 +++
arch/arm64/include/uapi/asm/kvm.h | 8 ++
arch/arm64/kernel/cpu_errata.c | 80 ++++-------
arch/arm64/kernel/paravirt.c | 147 +++++++++++++++++++
arch/arm64/kernel/time.c | 3 +
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/Makefile | 2 +
arch/arm64/kvm/handle_exit.c | 4 +-
include/kvm/arm_hypercalls.h | 43 ++++++
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 | 20 +++
virt/kvm/arm/hypercalls.c | 68 +++++++++
virt/kvm/arm/psci.c | 84 +----------
virt/kvm/arm/pvtime.c | 194 ++++++++++++++++++++++++++
virt/kvm/kvm_main.c | 6 +-
27 files changed, 758 insertions(+), 154 deletions(-)
create mode 100644 Documentation/virt/kvm/arm/pvtime.txt
create mode 100644 arch/arm64/include/asm/pvclock-abi.h
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
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2019-08-19 14:04 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-19 14:04 Steven Price [this message]
2019-08-19 14:04 ` [PATCH v2 0/9] arm64: Stolen time support Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 1/9] KVM: arm64: Document PV-time interface Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 2/9] KVM: arm/arm64: Factor out hypercall handling from PSCI code Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 3/9] KVM: arm64: Implement PV_FEATURES call Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 4/9] KVM: arm64: Support stolen time reporting via shared structure Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 16:40 ` Marc Zyngier
2019-08-19 16:40 ` Marc Zyngier
2019-08-19 16:40 ` Marc Zyngier
2019-08-21 10:27 ` Steven Price
2019-08-21 10:27 ` Steven Price
2019-08-21 10:27 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 5/9] KVM: Allow kvm_device_ops to be const Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 6/9] KVM: arm64: Provide a PV_TIME device to user space Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 7/9] arm/arm64: Provide a wrapper for SMCCC 1.1 calls Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 8/9] arm/arm64: Make use of the SMCCC 1.1 wrapper Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` [PATCH v2 9/9] arm64: Retrieve stolen time as paravirtualized guest Steven Price
2019-08-19 14:04 ` Steven Price
2019-08-19 14:04 ` Steven Price
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