| Message ID | 20191024110209.21328-1-jianyong.wu@arm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Enable ptp_kvm for arm64 | expand |
Hi all, Any comments? Thanks Jianyong > -----Original Message----- > From: Jianyong Wu <jianyong.wu@arm.com> > Sent: Thursday, October 24, 2019 7:02 PM > 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 > <Mark.Rutland@arm.com>; will@kernel.org; Suzuki Poulose > <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 > <Steve.Capper@arm.com>; Kaly Xin (Arm Technology China) > <Kaly.Xin@arm.com>; Justin He (Arm Technology China) > <Justin.He@arm.com>; Jianyong Wu (Arm Technology China) > <Jianyong.Wu@arm.com>; nd <nd@arm.com> > Subject: [RFC PATCH v6 0/7] Enable ptp_kvm for arm64 > > 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 v5 to v6: > (1) apply Mark's patch[4] to get SMCCC conduit. > (2) add mechanism to recognize current clocksource by add > clocksouce_id value into struct clocksource instead of method in patch-v5. > (3) rename kvm_arch_ptp_get_clock_fn into > kvm_arch_ptp_get_crosststamp. > > from v4 to v5: > (1) remove hvc delay compensasion as it should leave to userspace. > (2) check current clocksource in hvc call service. > (3) expose current clocksource by adding it to system_time_snapshot. > (4) add helper to check if clocksource is arm_arch_counter. > (5) rename kvm_ptp.c to ptp_kvm_common.c > > 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 > [4]https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/ > commit/?h=for-next/smccc-conduit- > cleanup&id=6b7fe77c334ae59fed9500140e08f4f896b36871 > > Jianyong Wu (6): > psci: let arm_smccc_1_1_invoke available by modules > ptp: Reorganize ptp_kvm modules to make it arch-independent. > time: Add mechanism to recognize clocksource in time_get_snapshot > psci: Add hvc call service for ptp_kvm. > ptp: arm64: Enable ptp_kvm for arm64 > kvm: arm64: Add capability check extension for ptp_kvm > > Mark Rutland (1): > arm/arm64: smccc/psci: add arm_smccc_1_1_get_conduit() > > drivers/clocksource/arm_arch_timer.c | 24 ++++++ > drivers/firmware/psci/psci.c | 16 ++++ > drivers/ptp/Kconfig | 2 +- > drivers/ptp/Makefile | 1 + > drivers/ptp/ptp_kvm_arm64.c | 53 +++++++++++++ > drivers/ptp/{ptp_kvm.c => ptp_kvm_common.c} | 77 +++++------------- > drivers/ptp/ptp_kvm_x86.c | 87 +++++++++++++++++++++ > include/asm-generic/ptp_kvm.h | 12 +++ > include/clocksource/arm_arch_timer.h | 4 + > include/linux/arm-smccc.h | 30 ++++++- > include/linux/clocksource.h | 6 ++ > include/linux/timekeeping.h | 12 +-- > include/uapi/linux/kvm.h | 1 + > kernel/time/clocksource.c | 3 + > kernel/time/timekeeping.c | 1 + > virt/kvm/arm/arm.c | 1 + > virt/kvm/arm/psci.c | 22 ++++++ > 17 files changed, 286 insertions(+), 66 deletions(-) create mode 100644 > drivers/ptp/ptp_kvm_arm64.c rename drivers/ptp/{ptp_kvm.c => > ptp_kvm_common.c} (63%) create mode 100644 > drivers/ptp/ptp_kvm_x86.c create mode 100644 include/asm- > generic/ptp_kvm.h > > -- > 2.17.1
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 v5 to v6: (1) apply Mark's patch[4] to get SMCCC conduit. (2) add mechanism to recognize current clocksource by add clocksouce_id value into struct clocksource instead of method in patch-v5. (3) rename kvm_arch_ptp_get_clock_fn into kvm_arch_ptp_get_crosststamp. from v4 to v5: (1) remove hvc delay compensasion as it should leave to userspace. (2) check current clocksource in hvc call service. (3) expose current clocksource by adding it to system_time_snapshot. (4) add helper to check if clocksource is arm_arch_counter. (5) rename kvm_ptp.c to ptp_kvm_common.c 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 [4]https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/ commit/?h=for-next/smccc-conduit-cleanup&id=6b7fe77c334ae59fed9500140e08f4f896b36871 Jianyong Wu (6): psci: let arm_smccc_1_1_invoke available by modules ptp: Reorganize ptp_kvm modules to make it arch-independent. time: Add mechanism to recognize clocksource in time_get_snapshot psci: Add hvc call service for ptp_kvm. ptp: arm64: Enable ptp_kvm for arm64 kvm: arm64: Add capability check extension for ptp_kvm Mark Rutland (1): arm/arm64: smccc/psci: add arm_smccc_1_1_get_conduit() drivers/clocksource/arm_arch_timer.c | 24 ++++++ drivers/firmware/psci/psci.c | 16 ++++ drivers/ptp/Kconfig | 2 +- drivers/ptp/Makefile | 1 + drivers/ptp/ptp_kvm_arm64.c | 53 +++++++++++++ drivers/ptp/{ptp_kvm.c => ptp_kvm_common.c} | 77 +++++------------- drivers/ptp/ptp_kvm_x86.c | 87 +++++++++++++++++++++ include/asm-generic/ptp_kvm.h | 12 +++ include/clocksource/arm_arch_timer.h | 4 + include/linux/arm-smccc.h | 30 ++++++- include/linux/clocksource.h | 6 ++ include/linux/timekeeping.h | 12 +-- include/uapi/linux/kvm.h | 1 + kernel/time/clocksource.c | 3 + kernel/time/timekeeping.c | 1 + virt/kvm/arm/arm.c | 1 + virt/kvm/arm/psci.c | 22 ++++++ 17 files changed, 286 insertions(+), 66 deletions(-) create mode 100644 drivers/ptp/ptp_kvm_arm64.c rename drivers/ptp/{ptp_kvm.c => ptp_kvm_common.c} (63%) create mode 100644 drivers/ptp/ptp_kvm_x86.c create mode 100644 include/asm-generic/ptp_kvm.h