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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 3B405C4CEC9 for ; Wed, 18 Sep 2019 08:09:48 +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 0860B20882 for ; Wed, 18 Sep 2019 08:09:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="C+Kx3E/W" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0860B20882 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+infradead-linux-arm-kernel=archiver.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:References: In-Reply-To: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:List-Owner; bh=cb6o7hwtK/kYXDpvUtKP6rT0R2qEtOrmV1nrP4fhirc=; b=C+Kx3E/W+1zxdMUsRRknJeF1VD 51cvzsUGxf67Fvux6e9xSzhYWwmeaNS9jIiqASvkyqZckL42wyMRSVUSDXXpJGmsgzx5DoHTnSUlN 8+QOS0L5UJUaed88k8OrciwLQ3CL2L69Z7en367cRpGMtdmi71RONEKDKLyJAwCOhIIL/THM9t7WP H1ljqB1t759fDmJfxnUICJ3bthaHpDnkvK4wkL5VtsedBQQW41S40DfgQgrEU0HlFWh1f6l9FL+Q6 G6UsOXQgT2fG3i9NKb0psH8uI6HHe/MD1TN7owJdAl/S2SJJQ8oPlwkCRVQaolWUGZn0+jypDXzDx eiP0Tkow==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iAV1t-00050P-FE; Wed, 18 Sep 2019 08:09:37 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iAV0D-00038g-52 for linux-arm-kernel@lists.infradead.org; Wed, 18 Sep 2019 08:08:00 +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 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 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190918_010759_681290_51901403 X-CRM114-Status: GOOD ( 10.26 ) 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, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel