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 30C84C432C2 for ; Thu, 26 Sep 2019 11:43:11 +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 EFA15208C3 for ; Thu, 26 Sep 2019 11:43:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gij4cVNI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EFA15208C3 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=eRNISG5v8xSQfdo3JPIvfq9ncAyTNszvAT4XRduXs04=; b=gij4cVNIJJ4mumRb+RxfHWsIl4 6wV+8MIYT0ZQ6krXvSzi0oBlOemeTjApGSQijintSQNwo1JnMJ7n6DeMFkKbcoyIG/ism72rOheoW f1PCUvb7LwrxgaJSiYGCoZD6jCOV/+ILMomCR+CmzEbEBxd/9tFl52yU7KpjFAD3s5jXPIT27BMOs p2KA2wfX6uO81FgikIhB2VOnWIVpod3oaqYg0f96AhnIW9oGqBfOs0n7tetpGP9WvYjlrNh+OonyX NdTElVXXH3kzpTo16Dt3OexwUt/3ah1HnPvUWf/U+2BXxlHH5q5ux0iQgb2+figfyXbQl3pi8SNjV BPbBq7nA==; 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 1iDSAr-0005Wn-Vw; Thu, 26 Sep 2019 11:43:05 +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 1iDSAS-00051d-4g for linux-arm-kernel@lists.infradead.org; Thu, 26 Sep 2019 11:42:41 +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 8954F142F; Thu, 26 Sep 2019 04:42:38 -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 EE0D73F67D; Thu, 26 Sep 2019 04:42:33 -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 v4 3/5] psci: Add hvc call service for ptp_kvm. Date: Thu, 26 Sep 2019 19:42:10 +0800 Message-Id: <20190926114212.5322-4-jianyong.wu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190926114212.5322-1-jianyong.wu@arm.com> References: <20190926114212.5322-1-jianyong.wu@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190926_044240_265931_4C9E150C X-CRM114-Status: UNSURE ( 9.15 ) X-CRM114-Notice: Please train this message. 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 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 | 18 ++++++++++++++++++ 2 files changed, 30 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..3f30fc42a5ca 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; + u64 cycles; + struct system_time_snapshot systime_snapshot; val[0] = SMCCC_RET_NOT_SUPPORTED; @@ -431,6 +433,22 @@ 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 high 32-bit host ktime; + * reg1 stores low 32-bit host ktime; + * reg2 stores high 32-bit difference of host cycles and cntvoff; + * reg3 stores low 32-bit difference of host cycles and cntvoff. + */ + case ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID: + ktime_get_snapshot(&systime_snapshot); + val[0] = systime_snapshot.real >> 32; + val[1] = systime_snapshot.real << 32 >> 32; + cycles = systime_snapshot.cycles - vcpu_vtimer(vcpu)->cntvoff; + val[2] = cycles >> 32; + val[3] = cycles << 32 >> 32; + 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