From: Jianyong Wu <jianyong.wu@arm.com>
To: netdev@vger.kernel.org, yangbo.lu@nxp.com,
john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com,
sean.j.christopherson@intel.com, maz@kernel.org,
richardcochran@gmail.com, Mark.Rutland@arm.com,
Will.Deacon@arm.com, suzuki.poulose@arm.com
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
Steve.Capper@arm.com, Kaly.Xin@arm.com, justin.he@arm.com,
jianyong.wu@arm.com, nd@arm.com
Subject: [RFC PATCH v4 0/6] Enable ptp_kvm for arm64
Date: Thu, 26 Sep 2019 19:42:07 +0800 [thread overview]
Message-ID: <20190926114212.5322-1-jianyong.wu@arm.com> (raw)
kvm ptp targets to provide high precision time sync between guest
and host in virtualization environment. This patch enable kvm ptp
for arm64.
This patch set base on [1][2][3]
change log:
from v3 to v4:
(1) fix clocksource of ptp_kvm to arch_sys_counter.
(2) move kvm_arch_ptp_get_clock_fn into arm_arch_timer.c
(3) subtract cntvoff before return cycles from host.
(4) use ktime_get_snapshot instead of getnstimeofday and
get_current_counterval to return time and counter value.
(5) split ktime and counter into two 32-bit block respectively
to avoid Y2038-safe issue.
(6) set time compensation to device time as half of the delay of hvc call.
(7) add ARM_ARCH_TIMER as dependency of ptp_kvm for
arm64.
from v2 to v3:
(1) fix some issues in commit log.
(2) add some receivers in send list.
from v1 to v2:
(1) move arch-specific code from arch/ to driver/ptp/
(2) offer mechanism to inform userspace if ptp_kvm service is
available.
(3) separate ptp_kvm code for arm64 into hypervisor part and
guest part.
(4) add API to expose monotonic clock and counter value.
(5) refine code: remove no necessary part and reconsitution.
[1]https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/
commit/?h=kvm/hvc&id=125ea89e4a21e2fc5235410f966a996a1a7148bf
[2]https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/
commit/?h=kvm/hvc&id=464f5a1741e5959c3e4d2be1966ae0093b4dce06
[3]https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/
commit/?h=kvm/hvc&id=6597490e005d0eeca8ed8c1c1d7b4318ee014681
Jianyong Wu (5):
psci: Export psci_ops.conduit symbol as modules will use it.
ptp: Reorganize ptp_kvm modules to make it arch-independent.
psci: Add hvc call service for ptp_kvm.
ptp: arm64: Enable ptp_kvm for arm64
kvm: arm64: Add capability check extension for ptp_kvm
drivers/clocksource/arm_arch_timer.c | 28 +++++++++
drivers/firmware/psci/psci.c | 6 ++
drivers/ptp/Kconfig | 2 +-
drivers/ptp/Makefile | 1 +
drivers/ptp/{ptp_kvm.c => kvm_ptp.c} | 79 +++++++------------------
drivers/ptp/ptp_kvm_arm64.c | 73 +++++++++++++++++++++++
drivers/ptp/ptp_kvm_x86.c | 87 ++++++++++++++++++++++++++++
include/asm-generic/ptp_kvm.h | 12 ++++
include/linux/arm-smccc.h | 14 ++++-
include/linux/psci.h | 1 +
include/uapi/linux/kvm.h | 1 +
virt/kvm/arm/arm.c | 1 +
virt/kvm/arm/psci.c | 18 ++++++
13 files changed, 262 insertions(+), 61 deletions(-)
rename drivers/ptp/{ptp_kvm.c => kvm_ptp.c} (63%)
create mode 100644 drivers/ptp/ptp_kvm_arm64.c
create mode 100644 drivers/ptp/ptp_kvm_x86.c
create mode 100644 include/asm-generic/ptp_kvm.h
--
2.17.1
next reply other threads:[~2019-09-26 11:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-26 11:42 Jianyong Wu [this message]
2019-09-26 11:42 ` [RFC PATCH v4 1/5] psci: Export psci_ops.conduit symbol as modules will use it Jianyong Wu
2019-09-26 11:42 ` [RFC PATCH v4 2/5] ptp: Reorganize ptp_kvm modules to make it arch-independent Jianyong Wu
2019-09-26 13:06 ` Suzuki K Poulose
2019-09-27 10:10 ` Jianyong Wu (Arm Technology China)
2019-09-27 10:12 ` Suzuki K Poulose
2019-09-27 10:14 ` Jianyong Wu (Arm Technology China)
2019-09-27 10:23 ` Suzuki K Poulose
2019-09-27 10:35 ` Jianyong Wu (Arm Technology China)
2019-09-26 11:42 ` [RFC PATCH v4 3/5] psci: Add hvc call service for ptp_kvm Jianyong Wu
2019-09-27 9:20 ` Sergei Shtylyov
2019-09-26 11:42 ` [RFC PATCH v4 4/5] ptp: arm64: Enable ptp_kvm for arm64 Jianyong Wu
2019-09-26 11:42 ` [RFC PATCH v4 5/5] kvm: arm64: Add capability check extension for ptp_kvm Jianyong Wu
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