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Subject[RFC PATCH v3 0/6] Enable ptp_kvm for arm64
Date
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 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 (6):
psci: Export psci_ops.conduit symbol as modules will use it.
ptp: Reorganize ptp_kvm modules to make it arch-independent.
timekeeping: Expose API allowing retrival of current clocksource and
counter value
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/firmware/psci/psci.c | 6 ++
drivers/ptp/Kconfig | 2 +-
drivers/ptp/Makefile | 1 +
drivers/ptp/{ptp_kvm.c => kvm_ptp.c} | 77 ++++++------------------
drivers/ptp/ptp_kvm_arm64.c | 82 ++++++++++++++++++++++++++
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/linux/timekeeping.h | 3 +
include/uapi/linux/kvm.h | 1 +
kernel/time/timekeeping.c | 13 +++++
virt/kvm/arm/arm.c | 1 +
virt/kvm/arm/psci.c | 17 ++++++
14 files changed, 256 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

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