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From: Jingyi Wang <wangjingyi11@huawei.com>
To: <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu>,
	<linux-arm-kernel@lists.infradead.org>
Cc: <will@kernel.org>, <catalin.marinas@arm.com>, <maz@kernel.org>,
	<james.morse@arm.com>, <julien.thierry.kdev@gmail.com>,
	<suzuki.poulose@arm.com>, <wanghaibin.wang@huawei.com>,
	<yezengruan@huawei.com>, <shameerali.kolothum.thodi@huawei.com>,
	<fanhenglong@huawei.com>, <wangjingyi11@huawei.com>,
	<prime.zeng@hisilicon.com>
Subject: [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature
Date: Tue, 29 Sep 2020 17:17:23 +0800	[thread overview]
Message-ID: <20200929091727.8692-1-wangjingyi11@huawei.com> (raw)

TWE Delay is an optional feature in ARMv8.6 Extentions. There is a
performance benefit in waiting for a period of time for an event to
arrive before taking the trap as it is common that event will arrive
“quite soon” after executing the WFE instruction.

This series adds support for TWED feature and implements TWE delay
value dynamic adjustment.

Thanks for Shameer's advice on this series. The function of this patch
has been tested on TWED supported hardware and the performance of it is
still on test, any advice will be welcomed.

Jingyi Wang (2):
  KVM: arm64: Make use of TWED feature
  KVM: arm64: Use dynamic TWE Delay value

Zengruan Ye (2):
  arm64: cpufeature: TWED support detection
  KVM: arm64: Add trace for TWED update

 arch/arm64/Kconfig                   | 10 +++++
 arch/arm64/include/asm/cpucaps.h     |  3 +-
 arch/arm64/include/asm/kvm_arm.h     |  5 +++
 arch/arm64/include/asm/kvm_emulate.h | 38 ++++++++++++++++++
 arch/arm64/include/asm/kvm_host.h    | 19 ++++++++-
 arch/arm64/include/asm/virt.h        |  8 ++++
 arch/arm64/kernel/cpufeature.c       | 12 ++++++
 arch/arm64/kvm/arm.c                 | 58 ++++++++++++++++++++++++++++
 arch/arm64/kvm/handle_exit.c         |  2 +
 arch/arm64/kvm/trace_arm.h           | 21 ++++++++++
 10 files changed, 174 insertions(+), 2 deletions(-)

-- 
2.19.1


WARNING: multiple messages have this Message-ID (diff)
From: Jingyi Wang <wangjingyi11@huawei.com>
To: <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu>,
	<linux-arm-kernel@lists.infradead.org>
Cc: catalin.marinas@arm.com, fanhenglong@huawei.com,
	prime.zeng@hisilicon.com, maz@kernel.org, will@kernel.org
Subject: [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature
Date: Tue, 29 Sep 2020 17:17:23 +0800	[thread overview]
Message-ID: <20200929091727.8692-1-wangjingyi11@huawei.com> (raw)

TWE Delay is an optional feature in ARMv8.6 Extentions. There is a
performance benefit in waiting for a period of time for an event to
arrive before taking the trap as it is common that event will arrive
“quite soon” after executing the WFE instruction.

This series adds support for TWED feature and implements TWE delay
value dynamic adjustment.

Thanks for Shameer's advice on this series. The function of this patch
has been tested on TWED supported hardware and the performance of it is
still on test, any advice will be welcomed.

Jingyi Wang (2):
  KVM: arm64: Make use of TWED feature
  KVM: arm64: Use dynamic TWE Delay value

Zengruan Ye (2):
  arm64: cpufeature: TWED support detection
  KVM: arm64: Add trace for TWED update

 arch/arm64/Kconfig                   | 10 +++++
 arch/arm64/include/asm/cpucaps.h     |  3 +-
 arch/arm64/include/asm/kvm_arm.h     |  5 +++
 arch/arm64/include/asm/kvm_emulate.h | 38 ++++++++++++++++++
 arch/arm64/include/asm/kvm_host.h    | 19 ++++++++-
 arch/arm64/include/asm/virt.h        |  8 ++++
 arch/arm64/kernel/cpufeature.c       | 12 ++++++
 arch/arm64/kvm/arm.c                 | 58 ++++++++++++++++++++++++++++
 arch/arm64/kvm/handle_exit.c         |  2 +
 arch/arm64/kvm/trace_arm.h           | 21 ++++++++++
 10 files changed, 174 insertions(+), 2 deletions(-)

-- 
2.19.1

_______________________________________________
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: Jingyi Wang <wangjingyi11@huawei.com>
To: <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu>,
	<linux-arm-kernel@lists.infradead.org>
Cc: suzuki.poulose@arm.com, catalin.marinas@arm.com,
	wangjingyi11@huawei.com, shameerali.kolothum.thodi@huawei.com,
	yezengruan@huawei.com, fanhenglong@huawei.com,
	james.morse@arm.com, prime.zeng@hisilicon.com, maz@kernel.org,
	wanghaibin.wang@huawei.com, will@kernel.org,
	julien.thierry.kdev@gmail.com
Subject: [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature
Date: Tue, 29 Sep 2020 17:17:23 +0800	[thread overview]
Message-ID: <20200929091727.8692-1-wangjingyi11@huawei.com> (raw)

TWE Delay is an optional feature in ARMv8.6 Extentions. There is a
performance benefit in waiting for a period of time for an event to
arrive before taking the trap as it is common that event will arrive
“quite soon” after executing the WFE instruction.

This series adds support for TWED feature and implements TWE delay
value dynamic adjustment.

Thanks for Shameer's advice on this series. The function of this patch
has been tested on TWED supported hardware and the performance of it is
still on test, any advice will be welcomed.

Jingyi Wang (2):
  KVM: arm64: Make use of TWED feature
  KVM: arm64: Use dynamic TWE Delay value

Zengruan Ye (2):
  arm64: cpufeature: TWED support detection
  KVM: arm64: Add trace for TWED update

 arch/arm64/Kconfig                   | 10 +++++
 arch/arm64/include/asm/cpucaps.h     |  3 +-
 arch/arm64/include/asm/kvm_arm.h     |  5 +++
 arch/arm64/include/asm/kvm_emulate.h | 38 ++++++++++++++++++
 arch/arm64/include/asm/kvm_host.h    | 19 ++++++++-
 arch/arm64/include/asm/virt.h        |  8 ++++
 arch/arm64/kernel/cpufeature.c       | 12 ++++++
 arch/arm64/kvm/arm.c                 | 58 ++++++++++++++++++++++++++++
 arch/arm64/kvm/handle_exit.c         |  2 +
 arch/arm64/kvm/trace_arm.h           | 21 ++++++++++
 10 files changed, 174 insertions(+), 2 deletions(-)

-- 
2.19.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2020-09-29  9:17 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29  9:17 Jingyi Wang [this message]
2020-09-29  9:17 ` [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature Jingyi Wang
2020-09-29  9:17 ` Jingyi Wang
2020-09-29  9:17 ` [RFC PATCH 1/4] arm64: cpufeature: TWED support detection Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17 ` [RFC PATCH 2/4] KVM: arm64: Make use of TWED feature Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17 ` [RFC PATCH 3/4] KVM: arm64: Use dynamic TWE Delay value Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17 ` [RFC PATCH 4/4] KVM: arm64: Add trace for TWED update Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29  9:17   ` Jingyi Wang
2020-09-29 10:50 ` [RFC PATCH 0/4] Add support for ARMv8.6 TWED feature Marc Zyngier
2020-09-29 10:50   ` Marc Zyngier
2020-09-29 10:50   ` Marc Zyngier
2020-09-30  1:21   ` Jingyi Wang
2020-09-30  1:21     ` Jingyi Wang
2020-09-30  1:21     ` Jingyi Wang
2020-11-13  7:54 ` Jingyi Wang
2020-11-13  7:54   ` Jingyi Wang
2020-11-13  7:54   ` Jingyi Wang
2020-11-24  3:19   ` Jingyi Wang
2020-11-24  3:19     ` Jingyi Wang
2020-11-24  3:19     ` Jingyi Wang
2020-11-24 11:02   ` Marc Zyngier
2020-11-24 11:02     ` Marc Zyngier
2020-11-24 11:02     ` Marc Zyngier
2020-11-26  2:31     ` Jingyi Wang
2020-11-26  2:31       ` Jingyi Wang
2020-11-26  2:31       ` Jingyi Wang

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