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 6727EC433FF for ; Fri, 2 Aug 2019 14:51:14 +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 34B5821773 for ; Fri, 2 Aug 2019 14:51:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="a75VC1Vf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 34B5821773 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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=69MD0TbEPe1k0+lzCXdSHNt9+bBYpmwXrNhf2DxlGes=; b=a75VC1VfftswXP TRew3E3FJH4hOUVEnS4Q7zhQepU1b7E+Y9SF21KNUXwSsqa0hk0UkwMmyCVOcadbYmLKzivWxKswx TWzB4hZZesXYI/YKOZTIJ0ClAPF2/UhuhCl8zhmD97frnf6boQ5k2KGb6fh/o4xRIKRmYK32MmQa2 qIHI2xaZuEZld32N7zjsU1pzS8chEe59no9dR39OhaGDGSJ7OdPH+X257eynJ2j+G6Zz3kkSB1jYM VzXjVL8T+VrNf49tAHjJETgJCV/WX7n4YaGbjX7KFqWC/Iq2ZCuCi8TkIFfc9vF6GmzCmEppgWWxn u5mOZgsarfotlXAoSKcw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1htYte-0003ar-5F; Fri, 02 Aug 2019 14:51:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1htYtB-0002qR-9g for linux-arm-kernel@lists.infradead.org; Fri, 02 Aug 2019 14:50:38 +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 613671597; Fri, 2 Aug 2019 07:50:36 -0700 (PDT) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.133]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7A2943F575; Fri, 2 Aug 2019 07:50:34 -0700 (PDT) From: Steven Price To: Subject: [PATCH 3/9] KVM: arm64: Implement PV_FEATURES call Date: Fri, 2 Aug 2019 15:50:11 +0100 Message-Id: <20190802145017.42543-4-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190802145017.42543-1-steven.price@arm.com> References: <20190802145017.42543-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190802_075037_440473_029F4C6D X-CRM114-Status: GOOD ( 14.66 ) 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: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Catalin Marinas , Suzuki K Pouloze , linux-doc@vger.kernel.org, Russell King , Steven Price , James Morse , linux-arm-kernel@lists.infradead.org, Marc Zyngier , Paolo Bonzini , Will Deacon , kvmarm@lists.cs.columbia.edu, Julien Thierry 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 provides a mechanism for querying which paravirtualized features are available in this hypervisor. Also add the header file which defines the ABI for the paravirtualized clock features we're about to add. Signed-off-by: Steven Price --- arch/arm64/include/asm/pvclock-abi.h | 20 ++++++++++++++++++++ include/linux/arm-smccc.h | 14 ++++++++++++++ virt/kvm/arm/hypercalls.c | 9 +++++++++ 3 files changed, 43 insertions(+) create mode 100644 arch/arm64/include/asm/pvclock-abi.h diff --git a/arch/arm64/include/asm/pvclock-abi.h b/arch/arm64/include/asm/pvclock-abi.h new file mode 100644 index 000000000000..1f7cdc102691 --- /dev/null +++ b/arch/arm64/include/asm/pvclock-abi.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 Arm Ltd. */ + +#ifndef __ASM_PVCLOCK_ABI_H +#define __ASM_PVCLOCK_ABI_H + +/* The below structures and constants are defined in ARM DEN0057A */ + +struct pvclock_vcpu_stolen_time_info { + __le32 revision; + __le32 attributes; + __le64 stolen_time; + /* Structure must be 64 byte aligned, pad to that size */ + u8 padding[48]; +} __packed; + +#define PV_VM_TIME_NOT_SUPPORTED -1 +#define PV_VM_TIME_INVALID_PARAMETERS -2 + +#endif diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 080012a6f025..e7f129f26ebd 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -45,6 +45,7 @@ #define ARM_SMCCC_OWNER_SIP 2 #define ARM_SMCCC_OWNER_OEM 3 #define ARM_SMCCC_OWNER_STANDARD 4 +#define ARM_SMCCC_OWNER_STANDARD_HYP 5 #define ARM_SMCCC_OWNER_TRUSTED_APP 48 #define ARM_SMCCC_OWNER_TRUSTED_APP_END 49 #define ARM_SMCCC_OWNER_TRUSTED_OS 50 @@ -302,5 +303,18 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, #define SMCCC_RET_NOT_SUPPORTED -1 #define SMCCC_RET_NOT_REQUIRED -2 +/* Paravirtualised time calls (defined by ARM DEN0057A) */ +#define ARM_SMCCC_HV_PV_FEATURES \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_STANDARD_HYP, \ + 0x20) + +#define ARM_SMCCC_HV_PV_TIME_ST \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_STANDARD_HYP, \ + 0x22) + #endif /*__ASSEMBLY__*/ #endif /*__LINUX_ARM_SMCCC_H*/ diff --git a/virt/kvm/arm/hypercalls.c b/virt/kvm/arm/hypercalls.c index f875241bd030..2906b2df99df 100644 --- a/virt/kvm/arm/hypercalls.c +++ b/virt/kvm/arm/hypercalls.c @@ -5,6 +5,7 @@ #include #include +#include #include #include @@ -48,6 +49,14 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) break; } break; + case ARM_SMCCC_HV_PV_FEATURES: + val = SMCCC_RET_SUCCESS; + break; + } + break; + case ARM_SMCCC_HV_PV_FEATURES: + feature = smccc_get_arg1(vcpu); + switch (feature) { } break; default: -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel