From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D279C3B184 for ; Mon, 10 Feb 2020 08:49:30 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 032D620733 for ; Mon, 10 Feb 2020 08:49:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 032D620733 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 52D074A52E; Mon, 10 Feb 2020 03:49:29 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gtfASJ2CQxbv; Mon, 10 Feb 2020 03:49:28 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 17D234A534; Mon, 10 Feb 2020 03:49:28 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 26E8E4A4FC for ; Mon, 10 Feb 2020 03:49:27 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zNckJZFL9Nqw for ; Mon, 10 Feb 2020 03:49:25 -0500 (EST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id A19CE4A4F7 for ; Mon, 10 Feb 2020 03:49:25 -0500 (EST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2197B31B; Mon, 10 Feb 2020 00:49:25 -0800 (PST) Received: from entos-d05.shanghai.arm.com (entos-d05.shanghai.arm.com [10.169.40.35]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 997A43F68F; Mon, 10 Feb 2020 00:49:19 -0800 (PST) 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@arm.com, will@kernel.org, suzuki.poulose@arm.com, steven.price@arm.com Subject: [RFC PATCH v10 0/9] Enable ptp_kvm for arm/arm64 Date: Mon, 10 Feb 2020 16:48:57 +0800 Message-Id: <20200210084906.24870-1-jianyong.wu@arm.com> X-Mailer: git-send-email 2.17.1 Cc: justin.he@arm.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, nd@arm.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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 independent. 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 impersonal. 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. 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 => 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 => 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 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm