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 C7010C0650F for ; Mon, 5 Aug 2019 13:43:13 +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 93C482087B for ; Mon, 5 Aug 2019 13:43:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="N+tDt1ju"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="GhFsSaA2"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b="Zp/g81ja" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 93C482087B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=wdc.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=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:In-Reply-To:References: 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=WBsamNM9O1ZnXhMoqBZQ3k7vn4Vq+1khOiNrtKng2dE=; b=N+tDt1juYufKJi fKXm7JIRVeGmvu0cdOADl84Ppm+lP9xRRq+aRbmQ7p7jScnUJ1sXbEUwpTVbyajjdY0wtO5zRzawE Qp+Rbf34Pr6fOKLDMYckz4y5FsZgE3IQWsBfm0RkKJbvNolOUH3LaX38EyEXFetaGj/aaaNW7kDzI Rtej6zWK7RjqTii+C6z41SrtJmGmEG4CSdZaLzvNFPRn/Zv0xg7u2AMln0o+ICa6LIALo0V1DI+vw 967BZwDsSAykW46o/DRwkV9Sh529mZioh3m8cGGlg8fPzEKn50W8GoR6NHXcuEyZbpxyVBkEceDk8 vt6YxFVCR6/J00PloVSQ==; 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 1hudGX-0001aZ-Re; Mon, 05 Aug 2019 13:43:09 +0000 Received: from esa5.hgst.iphmx.com ([216.71.153.144]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hudGT-0001Yo-J9 for linux-riscv@lists.infradead.org; Mon, 05 Aug 2019 13:43:08 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1565012586; x=1596548586; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=ldde7z9jjBz8/h7E5tuH9/t07Va9K9knryPZ3/i7mMo=; b=GhFsSaA2x7Od3sI2U2t4HPivLfKCjw3hD0MJ7BZwjUbgOmBP5zAOYrRt BC31FIdng0lsrs/l7S7fXtI5ZFl5hSYnvVbjFpTLXJG9WeP5+RA08x9rL RfVVpgLCyCN3y0WbX9vZ+oKrTvwC/M5zrsmxc7ZH7TpJACOQKe7QgdVSN aknsrFpalcPNiXBS/Gjjo+54sOW7OrpgxSzoiHaw1rycgzUgPdDGEf1cl H9sFNOBJPkpHMxvQflnuVxFAnGkMyvPsHkQ/gbDKeYUmPHl/u+Yyx5xKx xBSEc1B5NJ2gLYG/SESrUN5pBxnbkfvS1CW/ZjfbcKraJ44dTx97F4CW6 Q==; IronPort-SDR: qU9g2W9mAB8hz+BDyQSJCJ+qBnpp6UlBvCr4GHqk3g1ZsSmByZtd5Ic4CNLPwW+ZTVUog8BkNJ 5hFT98c5ZSf5Sz7Q0pBDZ/KkJn/4RWpM/v55ofgMW1/kM4aSiz3AsnWWswmnxbk7BFyjz4rLXB prEKr3e3w5UfpfFiFiufOMnZxu/w+FmyKmizF4U426kgzH9Vj6e332ndWJA0ohNtTuteZhmqh9 OLWFdrgDFthQj2IuPtVcLgg6H9EKT/8GrqL/yD79/mUa6Qp2KCNSpRZ+16lFLea7/C7ZixRLyd TmE= X-IronPort-AV: E=Sophos;i="5.64,350,1559491200"; d="scan'208";a="115996579" Received: from mail-by2nam05lp2051.outbound.protection.outlook.com (HELO NAM05-BY2-obe.outbound.protection.outlook.com) ([104.47.50.51]) by ob1.hgst.iphmx.com with ESMTP; 05 Aug 2019 21:43:02 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=X8hzkMh5ry3zmHKLAq0HV8LwanUipLSVYcGjXr+cllYDHZ1wtvOMmfPY0f5Lab3NYWGwvbaRuziMcQQrX+ygCx6OiqDXYXPGXBJUvbfJ9oOv7P//bLCnlnuLVWIPgN+lKGPfrkIqMyCXV6Oc6iVuZTCSD5SlKAX8N9t0j7BVpY0ZyFcRz+Q3/UW+uGrC6mc5+sFMMKyiApHKjJOO3IKr1Q2hhZOVQxr7IuzU/O34FTKQ6HTqahmDXtAll/6F+oMT1R37zbwegTPeU6DUClm22a6RA9V5tbsQAZ00yqKh+vS+MuMmoZYDGTqE5dLHgG5tuJ4tIeugS+v1j+HeR8PPag== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=5VvVK9MrCOdGCc2d1/dl1hjJbaxNAJl+j2zGc+YWwAI=; b=Ut6hBQb+g4lU1sil2eBvWcZnG0XyTR5ZY39JVHcRpYXoTb0tJerdkYyv2jagK3XjJ9mpvIujuN/Ikc7Zuq+WNJIHuA61FQBlaiaDioMzo9GuWVhW8JxKRbHw/l+7YL6r8Za1fv5ELb7Ch/nllBX4W+LWbLjyNfZR6FXTjd18PyXkOYoSHSqOsU8AdaC6kfyoYhxUVSeGfKjdVMhgh4JzBOtf8e0HEeepUPqPk7pjWWAEMHwnTxDVzMnG/x0DBb4LN+NNPNcFgxuE86CL4BpEbIUHOcU1/M+oZZAqkCWzBwooY0CLVIHfqNOWFODhMuTY7YQTe+1c9E5x5/D5Pf2alA== ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=wdc.com;dmarc=pass action=none header.from=wdc.com;dkim=pass header.d=wdc.com;arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sharedspace.onmicrosoft.com; s=selector2-sharedspace-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=5VvVK9MrCOdGCc2d1/dl1hjJbaxNAJl+j2zGc+YWwAI=; b=Zp/g81jaKyC56U7QAQpe4sJzwGA1afd6p2Q1NOPG4ZrVNL36u9zk2hoN8nnJn/NCQJgh1tkReznf3ass5lnqPxxfgiKTPuoBzFPqRohfXUj3+jBFycOlTeveL/ac9yda446P3fj6nFCxYmBs/0c+F5y15wKrQUahm6Rhbsg6yus= Received: from MN2PR04MB6061.namprd04.prod.outlook.com (20.178.246.15) by MN2PR04MB6159.namprd04.prod.outlook.com (20.178.249.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2136.17; Mon, 5 Aug 2019 13:43:00 +0000 Received: from MN2PR04MB6061.namprd04.prod.outlook.com ([fe80::a815:e61a:b4aa:60c8]) by MN2PR04MB6061.namprd04.prod.outlook.com ([fe80::a815:e61a:b4aa:60c8%7]) with mapi id 15.20.2136.018; Mon, 5 Aug 2019 13:43:00 +0000 From: Anup Patel To: Palmer Dabbelt , Paul Walmsley , Paolo Bonzini , Radim K Subject: [PATCH v3 04/19] RISC-V: Add initial skeletal KVM support Thread-Topic: [PATCH v3 04/19] RISC-V: Add initial skeletal KVM support Thread-Index: AQHVS5OylaWluBjVek6xhj2/Ycl3gw== Date: Mon, 5 Aug 2019 13:43:00 +0000 Message-ID: <20190805134201.2814-5-anup.patel@wdc.com> References: <20190805134201.2814-1-anup.patel@wdc.com> In-Reply-To: <20190805134201.2814-1-anup.patel@wdc.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BMXPR01CA0087.INDPRD01.PROD.OUTLOOK.COM (2603:1096:b00:54::27) To MN2PR04MB6061.namprd04.prod.outlook.com (2603:10b6:208:d8::15) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Anup.Patel@wdc.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [106.51.20.197] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 4bfcb34f-972b-4286-df7a-08d719aad478 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(7168020)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020); SRVR:MN2PR04MB6159; x-ms-traffictypediagnostic: MN2PR04MB6159: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:164; x-forefront-prvs: 01208B1E18 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(39860400002)(136003)(366004)(396003)(376002)(346002)(189003)(199004)(66556008)(66476007)(71190400001)(71200400001)(110136005)(54906003)(66946007)(66446008)(64756008)(53946003)(86362001)(5660300002)(102836004)(52116002)(55236004)(14454004)(99286004)(386003)(78486014)(316002)(256004)(14444005)(6506007)(76176011)(2616005)(6486002)(8676002)(9456002)(8936002)(36756003)(3846002)(6116002)(6512007)(4326008)(2906002)(476003)(305945005)(44832011)(81156014)(81166006)(26005)(30864003)(186003)(486006)(11346002)(25786009)(7736002)(1076003)(50226002)(478600001)(68736007)(446003)(53936002)(66066001)(6436002)(7416002)(579004); DIR:OUT; SFP:1102; SCL:1; SRVR:MN2PR04MB6159; H:MN2PR04MB6061.namprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: JbHYgnISb4DzS1hslYGHfkx6rT8VSmWhs6Vl4G9tcy6kjxFuUysOzgL77xqbMXCtjOnlSqZa+Oofqd+WKGsCAy/0yFFgto3Wom9nx/iqi4aBfI437fwvQNY0Vso3uSIRIMDSMnVnCMCsptXCgwqv4QnM6IgYEtYvjJ3obneg825sHB+TRl7nct7Aqxi/DYUcofw0BCf8J6+lD5dut7WYIXQcdMRhM9R4lW+EybbHBAx5vPiThO3OWI+pHLerFdxN1PaLQUqivDvnpuYXpDudmcDQ9DGYlwQOZPxlnoomxruFvwlOjW1xoV8a5x2CB88UEGGK3ysEYgGSlJhjRIQ/RXRvjWljhXST5B0hZm9Kd9GlrZ4jgZAcpLeejIVZ5JEPpN0IaYJYLQX3LotJI1HCEiEde1SuPrisrPzgkIdoQnY= MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4bfcb34f-972b-4286-df7a-08d719aad478 X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Aug 2019 13:43:00.0817 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Anup.Patel@wdc.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR04MB6159 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190805_064305_810338_CDEF935A X-CRM114-Status: GOOD ( 18.24 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Damien Le Moal , Anup Patel , "kvm@vger.kernel.org" , Anup Patel , Daniel Lezcano , "linux-kernel@vger.kernel.org" , Christoph Hellwig , Atish Patra , Alistair Francis , Thomas Gleixner , "linux-riscv@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org This patch adds initial skeletal KVM RISC-V support which has: 1. A simple implementation of arch specific VM functions except kvm_vm_ioctl_get_dirty_log() which will implemeted in-future as part of stage2 page loging. 2. Stubs of required arch specific VCPU functions except kvm_arch_vcpu_ioctl_run() which is semi-complete and extended by subsequent patches. 3. Stubs for required arch specific stage2 MMU functions. Signed-off-by: Anup Patel --- arch/riscv/Kconfig | 2 + arch/riscv/Makefile | 2 + arch/riscv/include/asm/kvm_host.h | 81 ++++++++ arch/riscv/include/uapi/asm/kvm.h | 47 +++++ arch/riscv/kvm/Kconfig | 33 ++++ arch/riscv/kvm/Makefile | 13 ++ arch/riscv/kvm/main.c | 80 ++++++++ arch/riscv/kvm/mmu.c | 83 ++++++++ arch/riscv/kvm/vcpu.c | 312 ++++++++++++++++++++++++++++++ arch/riscv/kvm/vcpu_exit.c | 35 ++++ arch/riscv/kvm/vm.c | 79 ++++++++ 11 files changed, 767 insertions(+) create mode 100644 arch/riscv/include/asm/kvm_host.h create mode 100644 arch/riscv/include/uapi/asm/kvm.h create mode 100644 arch/riscv/kvm/Kconfig create mode 100644 arch/riscv/kvm/Makefile create mode 100644 arch/riscv/kvm/main.c create mode 100644 arch/riscv/kvm/mmu.c create mode 100644 arch/riscv/kvm/vcpu.c create mode 100644 arch/riscv/kvm/vcpu_exit.c create mode 100644 arch/riscv/kvm/vm.c diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 59a4727ecd6c..906104b8dc74 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -289,3 +289,5 @@ menu "Power management options" source "kernel/power/Kconfig" endmenu + +source "arch/riscv/kvm/Kconfig" diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 7a117be8297c..9f4f418978b1 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -74,6 +74,8 @@ head-y := arch/riscv/kernel/head.o core-y += arch/riscv/kernel/ arch/riscv/mm/ arch/riscv/net/ +core-$(CONFIG_KVM) += arch/riscv/kvm/ + libs-y += arch/riscv/lib/ PHONY += vdso_install diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h new file mode 100644 index 000000000000..9459709656be --- /dev/null +++ b/arch/riscv/include/asm/kvm_host.h @@ -0,0 +1,81 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#ifndef __RISCV_KVM_HOST_H__ +#define __RISCV_KVM_HOST_H__ + +#include +#include +#include + +#ifdef CONFIG_64BIT +#define KVM_MAX_VCPUS (1U << 16) +#else +#define KVM_MAX_VCPUS (1U << 9) +#endif + +#define KVM_USER_MEM_SLOTS 512 +#define KVM_HALT_POLL_NS_DEFAULT 500000 + +#define KVM_VCPU_MAX_FEATURES 0 + +#define KVM_REQ_SLEEP \ + KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) +#define KVM_REQ_VCPU_RESET KVM_ARCH_REQ(1) + +struct kvm_vm_stat { + ulong remote_tlb_flush; +}; + +struct kvm_vcpu_stat { + u64 halt_successful_poll; + u64 halt_attempted_poll; + u64 halt_poll_invalid; + u64 halt_wakeup; + u64 ecall_exit_stat; + u64 wfi_exit_stat; + u64 mmio_exit_user; + u64 mmio_exit_kernel; + u64 exits; +}; + +struct kvm_arch_memory_slot { +}; + +struct kvm_arch { + /* stage2 page table */ + pgd_t *pgd; + phys_addr_t pgd_phys; +}; + +struct kvm_vcpu_arch { + /* Don't run the VCPU (blocked) */ + bool pause; + + /* SRCU lock index for in-kernel run loop */ + int srcu_idx; +}; + +static inline void kvm_arch_hardware_unsetup(void) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} +static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} + +void kvm_riscv_stage2_flush_cache(struct kvm_vcpu *vcpu); +int kvm_riscv_stage2_alloc_pgd(struct kvm *kvm); +void kvm_riscv_stage2_free_pgd(struct kvm *kvm); +void kvm_riscv_stage2_update_hgatp(struct kvm_vcpu *vcpu); + +int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run); +int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, + unsigned long scause, unsigned long stval); + +static inline void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch) {} + +#endif /* __RISCV_KVM_HOST_H__ */ diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h new file mode 100644 index 000000000000..d15875818b6e --- /dev/null +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#ifndef __LINUX_KVM_RISCV_H +#define __LINUX_KVM_RISCV_H + +#ifndef __ASSEMBLY__ + +#include +#include + +#define __KVM_HAVE_READONLY_MEM + +#define KVM_COALESCED_MMIO_PAGE_OFFSET 1 + +/* for KVM_GET_REGS and KVM_SET_REGS */ +struct kvm_regs { +}; + +/* for KVM_GET_FPU and KVM_SET_FPU */ +struct kvm_fpu { +}; + +/* KVM Debug exit structure */ +struct kvm_debug_exit_arch { +}; + +/* for KVM_SET_GUEST_DEBUG */ +struct kvm_guest_debug_arch { +}; + +/* definition of registers in kvm_run */ +struct kvm_sync_regs { +}; + +/* dummy definition */ +struct kvm_sregs { +}; + +#endif + +#endif /* __LINUX_KVM_RISCV_H */ diff --git a/arch/riscv/kvm/Kconfig b/arch/riscv/kvm/Kconfig new file mode 100644 index 000000000000..35fd30d0e432 --- /dev/null +++ b/arch/riscv/kvm/Kconfig @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# KVM configuration +# + +source "virt/kvm/Kconfig" + +menuconfig VIRTUALIZATION + bool "Virtualization" + help + Say Y here to get to see options for using your Linux host to run + other operating systems inside virtual machines (guests). + This option alone does not add any kernel code. + + If you say N, all options in this submenu will be skipped and + disabled. + +if VIRTUALIZATION + +config KVM + tristate "Kernel-based Virtual Machine (KVM) support" + depends on OF + select PREEMPT_NOTIFIERS + select ANON_INODES + select KVM_MMIO + select HAVE_KVM_VCPU_ASYNC_IOCTL + select SRCU + help + Support hosting virtualized guest machines. + + If unsure, say N. + +endif # VIRTUALIZATION diff --git a/arch/riscv/kvm/Makefile b/arch/riscv/kvm/Makefile new file mode 100644 index 000000000000..37b5a59d4f4f --- /dev/null +++ b/arch/riscv/kvm/Makefile @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for RISC-V KVM support +# + +common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o) + +ccflags-y := -Ivirt/kvm -Iarch/riscv/kvm + +kvm-objs := $(common-objs-y) + +kvm-objs += main.o vm.o mmu.o vcpu.o vcpu_exit.o + +obj-$(CONFIG_KVM) += kvm.o diff --git a/arch/riscv/kvm/main.c b/arch/riscv/kvm/main.c new file mode 100644 index 000000000000..a26a68df7cfc --- /dev/null +++ b/arch/riscv/kvm/main.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#include +#include +#include +#include +#include +#include + +long kvm_arch_dev_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + return -EINVAL; +} + +int kvm_arch_check_processor_compat(void) +{ + return 0; +} + +int kvm_arch_hardware_setup(void) +{ + return 0; +} + +int kvm_arch_hardware_enable(void) +{ + unsigned long hideleg, hedeleg; + + hedeleg = 0; + hedeleg |= (1UL << EXC_INST_MISALIGNED); + hedeleg |= (1UL << EXC_BREAKPOINT); + hedeleg |= (1UL << EXC_SYSCALL); + hedeleg |= (1UL << EXC_INST_PAGE_FAULT); + hedeleg |= (1UL << EXC_LOAD_PAGE_FAULT); + hedeleg |= (1UL << EXC_STORE_PAGE_FAULT); + csr_write(CSR_HEDELEG, hedeleg); + + hideleg = 0; + hideleg |= SIE_SSIE; + hideleg |= SIE_STIE; + hideleg |= SIE_SEIE; + csr_write(CSR_HIDELEG, hideleg); + + return 0; +} + +void kvm_arch_hardware_disable(void) +{ + csr_write(CSR_HEDELEG, 0); + csr_write(CSR_HIDELEG, 0); +} + +int kvm_arch_init(void *opaque) +{ + if (!riscv_isa_extension_available(h)) { + kvm_info("hypervisor extension not available\n"); + return -ENODEV; + } + + kvm_info("hypervisor extension available\n"); + + return 0; +} + +void kvm_arch_exit(void) +{ +} + +static int riscv_kvm_init(void) +{ + return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); +} +module_init(riscv_kvm_init); diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c new file mode 100644 index 000000000000..04dd089b86ff --- /dev/null +++ b/arch/riscv/kvm/mmu.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, + struct kvm_memory_slot *dont) +{ +} + +int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, + unsigned long npages) +{ + return 0; +} + +void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) +{ +} + +void kvm_arch_flush_shadow_all(struct kvm *kvm) +{ + /* TODO: */ +} + +void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) +{ +} + +void kvm_arch_commit_memory_region(struct kvm *kvm, + const struct kvm_userspace_memory_region *mem, + const struct kvm_memory_slot *old, + const struct kvm_memory_slot *new, + enum kvm_mr_change change) +{ + /* TODO: */ +} + +int kvm_arch_prepare_memory_region(struct kvm *kvm, + struct kvm_memory_slot *memslot, + const struct kvm_userspace_memory_region *mem, + enum kvm_mr_change change) +{ + /* TODO: */ + return 0; +} + +void kvm_riscv_stage2_flush_cache(struct kvm_vcpu *vcpu) +{ + /* TODO: */ +} + +int kvm_riscv_stage2_alloc_pgd(struct kvm *kvm) +{ + /* TODO: */ + return 0; +} + +void kvm_riscv_stage2_free_pgd(struct kvm *kvm) +{ + /* TODO: */ +} + +void kvm_riscv_stage2_update_hgatp(struct kvm_vcpu *vcpu) +{ + /* TODO: */ +} diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c new file mode 100644 index 000000000000..48536cb0c8e7 --- /dev/null +++ b/arch/riscv/kvm/vcpu.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU } + +struct kvm_stats_debugfs_item debugfs_entries[] = { + VCPU_STAT(ecall_exit_stat), + VCPU_STAT(wfi_exit_stat), + VCPU_STAT(mmio_exit_user), + VCPU_STAT(mmio_exit_kernel), + VCPU_STAT(exits), + { NULL } +}; + +struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) +{ + /* TODO: */ + return NULL; +} + +int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) +{ + return 0; +} + +void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) +{ +} + +int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) +{ + /* TODO: */ + return 0; +} + +void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) +{ + /* TODO: */ +} + +int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) +{ + /* TODO: */ + return 0; +} + +void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) +{ +} + +void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) +{ +} + +int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) +{ + /* TODO: */ + return 0; +} + +int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) +{ + /* TODO: */ + return 0; +} + +bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) +{ + /* TODO: */ + return false; +} + +bool kvm_arch_has_vcpu_debugfs(void) +{ + return false; +} + +int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) +{ + return 0; +} + +vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) +{ + return VM_FAULT_SIGBUS; +} + +long kvm_arch_vcpu_async_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + /* TODO; */ + return -ENOIOCTLCMD; +} + +long kvm_arch_vcpu_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + /* TODO: */ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, + struct kvm_sregs *sregs) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, + struct kvm_sregs *sregs) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, + struct kvm_translation *tr) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) +{ + return -EINVAL; +} + +int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, + struct kvm_mp_state *mp_state) +{ + /* TODO: */ + return 0; +} + +int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, + struct kvm_mp_state *mp_state) +{ + /* TODO: */ + return 0; +} + +int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg) +{ + /* TODO; To be implemented later. */ + return -EINVAL; +} + +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +{ + /* TODO: */ + + kvm_riscv_stage2_update_hgatp(vcpu); +} + +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) +{ + /* TODO: */ +} + +static void kvm_riscv_check_vcpu_requests(struct kvm_vcpu *vcpu) +{ + /* TODO: */ +} + +int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) +{ + int ret; + unsigned long scause, stval; + + vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + + /* Process MMIO value returned from user-space */ + if (run->exit_reason == KVM_EXIT_MMIO) { + ret = kvm_riscv_vcpu_mmio_return(vcpu, vcpu->run); + if (ret) { + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + return ret; + } + } + + if (run->immediate_exit) { + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + return -EINTR; + } + + vcpu_load(vcpu); + + kvm_sigset_activate(vcpu); + + ret = 1; + run->exit_reason = KVM_EXIT_UNKNOWN; + while (ret > 0) { + /* Check conditions before entering the guest */ + cond_resched(); + + kvm_riscv_check_vcpu_requests(vcpu); + + preempt_disable(); + + local_irq_disable(); + + /* + * Exit if we have a signal pending so that we can deliver + * the signal to user space. + */ + if (signal_pending(current)) { + ret = -EINTR; + run->exit_reason = KVM_EXIT_INTR; + } + + /* + * Ensure we set mode to IN_GUEST_MODE after we disable + * interrupts and before the final VCPU requests check. + * See the comment in kvm_vcpu_exiting_guest_mode() and + * Documentation/virtual/kvm/vcpu-requests.rst + */ + vcpu->mode = IN_GUEST_MODE; + + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + smp_mb__after_srcu_read_unlock(); + + if (ret <= 0 || + kvm_request_pending(vcpu)) { + vcpu->mode = OUTSIDE_GUEST_MODE; + local_irq_enable(); + preempt_enable(); + vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + continue; + } + + guest_enter_irqoff(); + + __kvm_riscv_switch_to(&vcpu->arch); + + vcpu->mode = OUTSIDE_GUEST_MODE; + vcpu->stat.exits++; + + /* Save SCAUSE and STVAL because we might get an interrupt + * between __kvm_riscv_switch_to() and local_irq_enable() + * which can potentially overwrite SCAUSE and STVAL. + */ + scause = csr_read(CSR_SCAUSE); + stval = csr_read(CSR_STVAL); + + /* + * We may have taken a host interrupt in VS/VU-mode (i.e. + * while executing the guest). This interrupt is still + * pending, as we haven't serviced it yet! + * + * We're now back in HS-mode with interrupts disabled + * so enabling the interrupts now will have the effect + * of taking the interrupt again, in HS-mode this time. + */ + local_irq_enable(); + + /* + * We do local_irq_enable() before calling guest_exit() so + * that if a timer interrupt hits while running the guest + * we account that tick as being spent in the guest. We + * enable preemption after calling guest_exit() so that if + * we get preempted we make sure ticks after that is not + * counted as guest time. + */ + guest_exit(); + + preempt_enable(); + + vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + + ret = kvm_riscv_vcpu_exit(vcpu, run, scause, stval); + } + + kvm_sigset_deactivate(vcpu); + + vcpu_put(vcpu); + + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + + return ret; +} diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c new file mode 100644 index 000000000000..e4d7c8f0807a --- /dev/null +++ b/arch/riscv/kvm/vcpu_exit.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#include +#include +#include + +/** + * kvm_riscv_vcpu_mmio_return -- Handle MMIO loads after user space emulation + * or in-kernel IO emulation + * + * @vcpu: The VCPU pointer + * @run: The VCPU run struct containing the mmio data + */ +int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run) +{ + /* TODO: */ + return 0; +} + +/* + * Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on + * proper exit to userspace. + */ +int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, + unsigned long scause, unsigned long stval) +{ + /* TODO: */ + return 0; +} diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c new file mode 100644 index 000000000000..ac0211820521 --- /dev/null +++ b/arch/riscv/kvm/vm.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#include +#include +#include +#include +#include + +int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) +{ + /* TODO: To be added later. */ + return -ENOTSUPP; +} + +int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) +{ + int r; + + r = kvm_riscv_stage2_alloc_pgd(kvm); + if (r) + return r; + + return 0; +} + +void kvm_arch_destroy_vm(struct kvm *kvm) +{ + int i; + + for (i = 0; i < KVM_MAX_VCPUS; ++i) { + if (kvm->vcpus[i]) { + kvm_arch_vcpu_destroy(kvm->vcpus[i]); + kvm->vcpus[i] = NULL; + } + } +} + +int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) +{ + int r; + + switch (ext) { + case KVM_CAP_DEVICE_CTRL: + case KVM_CAP_USER_MEMORY: + case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: + case KVM_CAP_ONE_REG: + case KVM_CAP_READONLY_MEM: + case KVM_CAP_MP_STATE: + case KVM_CAP_IMMEDIATE_EXIT: + r = 1; + break; + case KVM_CAP_NR_VCPUS: + r = num_online_cpus(); + break; + case KVM_CAP_MAX_VCPUS: + r = KVM_MAX_VCPUS; + break; + case KVM_CAP_NR_MEMSLOTS: + r = KVM_USER_MEM_SLOTS; + break; + default: + r = 0; + break; + } + + return r; +} + +long kvm_arch_vm_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + return -EINVAL; +} -- 2.17.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv