From patchwork Mon Feb 10 08:48:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianyong Wu X-Patchwork-Id: 11372747 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AF20C109A for ; Mon, 10 Feb 2020 08:49:40 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 855CB21775 for ; Mon, 10 Feb 2020 08:49:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="i4sDvfiF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 855CB21775 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=G+Z7OwnkoO7RyQ9j/jzVAqwTCZvcaWY9Z+/DnXaD8i8=; b=i4s DvfiF7QQOoUBIJE+/rVKmwqyQ/iOS/nQmmgm5i0Q7YSufeDwHAGH9pcSffTZ0lSKAYR6tNhqWfDBG cfplzKGUHpzFiZ5kX+qLuGRPdu7zGOgJLv8gkyUOyVuA0naEG/M6HMA7YhSk+UDQqfvMxVAeV4xL+ vzHWNFjySabRyBtgoCyKZteT1o7w9ag3YLubEADc8zDszdL99LO6WQUWQzgo+S6Z+SBK665bal5pF qlsgTGEVL1OpvmVkYvdKeYlymfjIgbKMIO2GOgpiNGssa8M4nQyju8rHF9q84PP4D4evSRPG/ECRJ LPLelfbzqkT1qTQ2QIfg1imIZ3HSfFw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j14l3-0006xp-Q0; Mon, 10 Feb 2020 08:49:33 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j14l0-0006x1-QI for linux-arm-kernel@lists.infradead.org; Mon, 10 Feb 2020 08:49:32 +0000 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200210_004930_941969_68FBA567 X-CRM114-Status: GOOD ( 14.07 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: justin.he@arm.com, kvm@vger.kernel.org, Steve.Capper@arm.com, jianyong.wu@arm.com, linux-kernel@vger.kernel.org, Kaly.Xin@arm.com, nd@arm.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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