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Fri, 27 Mar 2020 09:35:07 +0000 From: Jianyong Wu 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 , "will@kernel.org" , Suzuki Poulose , Steven Price CC: "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.cs.columbia.edu" , "kvm@vger.kernel.org" , Steve Capper , Kaly Xin , Justin He , nd Subject: RE: [RFC PATCH v10 0/9] Enable ptp_kvm for arm/arm64 Thread-Topic: [RFC PATCH v10 0/9] Enable ptp_kvm for arm/arm64 Thread-Index: AQHV3+8FAZbnQUsGIUmOWBKSwbVS66gess5QgD27D8A= Date: Fri, 27 Mar 2020 09:35:07 +0000 Message-ID: References: <20200210084906.24870-1-jianyong.wu@arm.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ts-tracking-id: a73d9b45-bda9-495d-abbc-c063834e7d3a.1 x-checkrecipientchecked: true Authentication-Results-Original: spf=none (sender IP is ) smtp.mailfrom=Jianyong.Wu@arm.com; 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Is there any comments.=20 Need some comments to move forward. Thanks Jianyong=20 > -----Original Message----- > From: Jianyong Wu > Sent: Monday, February 17, 2020 10:29 AM > To: Jianyong Wu ; 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 ; > will@kernel.org; Suzuki Poulose ; Steven Price > > Cc: linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; > kvmarm@lists.cs.columbia.edu; kvm@vger.kernel.org; Steve Capper > ; Kaly Xin ; Justin He > ; nd > Subject: RE: [RFC PATCH v10 0/9] Enable ptp_kvm for arm/arm64 >=20 > Hi, > As this version change a lot, expect more comments. thanks. >=20 > Thanks > Jianyong > > -----Original Message----- > > From: Jianyong Wu > > Sent: Monday, February 10, 2020 4:49 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 ; > > will@kernel.org; Suzuki Poulose ; Steven Price > > > > Cc: linux-kernel@vger.kernel.org; > > linux-arm-kernel@lists.infradead.org; > > kvmarm@lists.cs.columbia.edu; kvm@vger.kernel.org; Steve Capper > > ; Kaly Xin ; Justin He > > ; Jianyong Wu ; nd > > > > Subject: [RFC PATCH v10 0/9] Enable ptp_kvm for arm/arm64 > > > > kvm ptp targets to provide high precision time sync between guest and > > host in virtualization environment. Here, we enable kvm ptp for arm64. > > > > change log: > > from v10 to v9 > > (1) change code base to v5.5. > > (2) enable ptp_kvm both for arm32 and arm64. > > (3) let user choose which of virtual counter or physical > > counter should return when using crosstimestamp mode of ptp_kvm for > arm/arm64. > > (4) extend input argument for getcrosstimestamp API. > > > > from v8 to v9: > > (1) move ptp_kvm.h to driver/ptp/ > > (2) replace license declaration of ptp_kvm.h the same with > > other header files in the same directory. > > > > from v7 to v8: > > (1) separate adding clocksource id for arm_arch_counter as a > > single patch. > > (2) update commit message for patch 4/8. > > (3) refine patch 7/8 and patch 8/8 to make them more independen= t. > > > > from v6 to v7: > > (1) include the omitted clocksource_id.h in last version. > > (2) reorder the header file in patch. > > (3) refine some words in commit message to make it more imperso= nal. > > > > 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 userspa= ce. > > (2) check current clocksource in hvc call service. > > (3) expose current clocksource by adding it to system_time_snap= shot. > > (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 o= f 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 a= vailable. > > (3) separate ptp_kvm code for arm64 into hypervisor part and gu= est > part. > > (4) add API to expose monotonic clock and counter value. > > (5) refine code: remove no necessary part and reconsitution. > > > > > > Jianyong Wu (8): > > psci: export psci conduit get helper. > > ptp: Reorganize ptp_kvm modules to make it arch-independent. > > clocksource: Add clocksource id for arm arch counter > > psci: Add hypercall service for ptp_kvm. > > ptp: arm/arm64: Enable ptp_kvm for arm/arm64 > > ptp: extend input argument for getcrosstimestamp API > > arm/arm64: add mechanism to let user choose which counter to return > > arm/arm64: Add kvm capability check extension for ptp_kvm > > > > Thomas Gleixner (1): > > time: Add mechanism to recognize clocksource in time_get_snapshot > > > > drivers/clocksource/arm_arch_timer.c | 33 ++++++++ > > drivers/firmware/psci/psci.c | 1 + > > drivers/net/ethernet/intel/e1000e/ptp.c | 3 +- > > drivers/ptp/Kconfig | 2 +- > > drivers/ptp/Makefile | 5 ++ > > drivers/ptp/ptp_chardev.c | 8 +- > > drivers/ptp/ptp_kvm.h | 11 +++ > > drivers/ptp/ptp_kvm_arm.c | 53 +++++++++++++ > > drivers/ptp/{ptp_kvm.c =3D> ptp_kvm_common.c} | 83 ++++++-------------= - > > drivers/ptp/ptp_kvm_x86.c | 87 +++++++++++++++++++++ > > include/linux/arm-smccc.h | 21 +++++ > > include/linux/clocksource.h | 6 ++ > > include/linux/clocksource_ids.h | 13 +++ > > include/linux/ptp_clock_kernel.h | 3 +- > > include/linux/timekeeping.h | 12 +-- > > include/uapi/linux/kvm.h | 1 + > > include/uapi/linux/ptp_clock.h | 4 +- > > kernel/time/clocksource.c | 3 + > > kernel/time/timekeeping.c | 1 + > > virt/kvm/arm/arm.c | 1 + > > virt/kvm/arm/hypercalls.c | 44 ++++++++++- > > 21 files changed, 323 insertions(+), 72 deletions(-) create mode > > 100644 drivers/ptp/ptp_kvm.h create mode 100644 > > drivers/ptp/ptp_kvm_arm.c rename drivers/ptp/{ptp_kvm.c =3D> > > ptp_kvm_common.c} (60%) create mode > > 100644 drivers/ptp/ptp_kvm_x86.c create mode 100644 > > include/linux/clocksource_ids.h > > > > -- > > 2.17.1