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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 5C46DC4CEC9 for ; Wed, 18 Sep 2019 08:08:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3BC6F21906 for ; Wed, 18 Sep 2019 08:08:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729703AbfIRIH7 (ORCPT ); Wed, 18 Sep 2019 04:07:59 -0400 Received: from foss.arm.com ([217.140.110.172]:36842 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729621AbfIRIHx (ORCPT ); Wed, 18 Sep 2019 04:07:53 -0400 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 7968E28; Wed, 18 Sep 2019 01:07:52 -0700 (PDT) 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 61F643F59C; Wed, 18 Sep 2019 01:07:47 -0700 (PDT) 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.Deacon@arm.com, suzuki.poulose@arm.com Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Steve.Capper@arm.com, Kaly.Xin@arm.com, justin.he@arm.com, jianyong.wu@arm.com, nd@arm.com, linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v3 4/6] psci: Add hvc call service for ptp_kvm. Date: Wed, 18 Sep 2019 04:07:14 -0400 Message-Id: <20190918080716.64242-5-jianyong.wu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190918080716.64242-1-jianyong.wu@arm.com> References: <20190918080716.64242-1-jianyong.wu@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch is the base of ptp_kvm for arm64. ptp_kvm modules will call hvc to get this service. The service offers real time and counter cycle of host for guest. Signed-off-by: Jianyong Wu --- include/linux/arm-smccc.h | 12 ++++++++++++ virt/kvm/arm/psci.c | 17 +++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index a6e4d3e3d10a..bc0cdad10f35 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -94,6 +94,7 @@ /* KVM "vendor specific" services */ #define ARM_SMCCC_KVM_FUNC_FEATURES 0 +#define ARM_SMCCC_KVM_PTP 1 #define ARM_SMCCC_KVM_FUNC_FEATURES_2 127 #define ARM_SMCCC_KVM_NUM_FUNCS 128 @@ -103,6 +104,17 @@ ARM_SMCCC_OWNER_VENDOR_HYP, \ ARM_SMCCC_KVM_FUNC_FEATURES) +/* + * This ID used for virtual ptp kvm clock and it will pass second value + * and nanosecond value of host real time and system counter by vcpu + * register to guest. + */ +#define ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + ARM_SMCCC_KVM_PTP) + #ifndef __ASSEMBLY__ #include diff --git a/virt/kvm/arm/psci.c b/virt/kvm/arm/psci.c index 0debf49bf259..2c5d53817a28 100644 --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -392,6 +392,8 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) u32 func_id = smccc_get_function(vcpu); u32 val[4] = {}; u32 option; + struct timespec *ts; + struct system_counterval_t sc; val[0] = SMCCC_RET_NOT_SUPPORTED; @@ -431,6 +433,21 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) case ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID: val[0] = BIT(ARM_SMCCC_KVM_FUNC_FEATURES); break; + /* + * This will used for virtual ptp kvm clock. three + * values will be passed back. + * reg0 stores seconds of host real time; + * reg1 stores nanoseconds of host real time; + * reg2 stores system counter cycle value. + */ + case ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID: + getnstimeofday(ts); + get_current_counterval(&sc); + val[0] = ts->tv_sec; + val[1] = ts->tv_nsec; + val[2] = sc.cycles; + val[3] = 0; + break; default: return kvm_psci_call(vcpu); } -- 2.17.1