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Date: Tue, 17 Sep 2019 07:24:24 -0400 From: Jianyong Wu <jianyong.wu@....com> To: netdev@...r.kernel.org, pbonzini@...hat.com, sean.j.christopherson@...el.com, maz@...nel.org, richardcochran@...il.com, Mark.Rutland@....com, Will.Deacon@....com, suzuki.poulose@....com Cc: linux-kernel@...r.kernel.org, Steve.Capper@....com, Kaly.Xin@....com, justin.he@....com, jianyong.wu@....com, nd@....com, linux-arm-kernel@...ts.infradead.org Subject: [RFC PATCH v2 0/6] 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 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): Export psci_ops.conduit symbol as modules will use it. reorganize ptp_kvm modules to make it arch-independent. Timer: expose monotonic clock and counter value arm64: Add hvc call service for ptp_kvm. Enable ptp_kvm for arm64 kvm: add kvm ptp capability extension for arm64 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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