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=ham 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 252BFC32750 for ; Fri, 2 Aug 2019 07:49:03 +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 EC03E2087E for ; Fri, 2 Aug 2019 07:49:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="FBBzHhUJ"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="jLZ0Flvt"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b="G31vd5bV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EC03E2087E 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=Ak//OeL7bglqmGYxMQ6mL6YvTQLExx4t3wUYk6MLDDo=; b=FBBzHhUJQZQmju 8uoc73WG7wTxYa75IdbTbGpw29WgSqnlENu6y6KLhIgUfTHYIJsIR2HjCPRFfKy907G0wzMA/32nM E6ueQel3TIozcuTORZoF0bMBsErNbEnfmfwRcYCPw7RbxKAwK/dlY3xIVV2hsWod1rXLoZPHa2wjJ HQz8r4j5e1vsefdEOLr9qCfXFnkSHDKiHJ8dRXdOxOC2zahNk1TXSE9NYLTrZJCY2ICNXb6hev6jz HmLpWMw/Vcoyf1qi+leklXLgbej1seXjym1/9WQ89BguvAV7//KhcSviIhKqT6zVqqPk38l4SKQUX Ods+v7hgWo/hNqIrn7iQ==; 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 1htSJA-0003xB-LC; Fri, 02 Aug 2019 07:49:00 +0000 Received: from esa2.hgst.iphmx.com ([68.232.143.124]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1htSIy-0003sZ-LQ for linux-riscv@lists.infradead.org; Fri, 02 Aug 2019 07:48:51 +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=1564732150; x=1596268150; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=e+kyewE4ROqForPiiZc8CPhe7KiF+cZH3jJVEnqVXRI=; b=jLZ0FlvtWIQFP3Y5NpPZ0ii8JGscOkjI+bfXhynn3zNv/jkBHUstDCMh I3inh+McoKZjDrspWFRJDmxeqkR9sgnUTqDd+4YGKrO6rRklibbIjgdQh OMia4ub2vKy8wRF3bl0YS7eW1Y1k7piCa51EXjed487z0pB0TqUb4gHCi Vc/4k0nQlVLZVwx0dciJs81VOcjyU0ySv1dTFKW/14/ZbpNDfPWMiFQy3 3Ba7sVy34v5jzQyl/N4GvNTfQAPh+Zw3yUluzjMkDHl44ATAWK0LmVPgY IbBzvXAZqTYiifaxMdkpQ4RA0xpDgLHumxTQlqPSKp1bryuuGmvua5YOa Q==; IronPort-SDR: cg9TLFefsjcZpCPxuMI3aJKNlnQzq80hsq8lsgzKXmDsKwA0lX/09JJDBz6kVDJG620SXJQ/AG R7PeIC3C+QOI3J9gqX55Ac9nTxE+0gwceDAEXLkL08r5Q8XXW9NfEeojP2ouf3EMDgaD1Ggh92 ivMw8N63OPVBNb92m9i07Zk+8Q+Be0TvvPSfKRLzOcYRGCf/iXvjgwZoLXshzMC75aznBQN7Xb zinzexgWmuwOcSkbvXJLi3wfc2mo4h4Mpro3u5ALtyOLbliKpL1qFNrIe/yG/ra5EboXwqOJ5Y nB0= X-IronPort-AV: E=Sophos;i="5.64,337,1559491200"; d="scan'208";a="215006741" Received: from mail-co1nam04lp2053.outbound.protection.outlook.com (HELO NAM04-CO1-obe.outbound.protection.outlook.com) ([104.47.45.53]) by ob1.hgst.iphmx.com with ESMTP; 02 Aug 2019 15:49:06 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=T/fiI4dbAAI0HiAZkXi8RddvM1JyzhbxyD4p48Bbgp0KOJpMkVJUhCgsQN0HlwT99Sq4wMGtDbyqUpmde9XdYNANuYD4tQUJ9ry/y252e8rawTuNa1meQ3FVOaScU6IpTrnm3jjdb0w2LWDwD+t+Tg/GqrjpQwUkZikm6xYsqif3SL0+VkPOdvitE9ROBdga36le3u05hLgKWjXpmnV0oGLdQ/KyhcXHeSkGH/MfJhBHU+GuwEgUWlz/BQ8Ga/PIdTZw0KHneJldLsLqP+JdPXZt3Qp3cGPrpbMAgmYtWbAnyCRkcGsZEUqT+pwIBOvzmJ7Z11tnFR8M17TNKWTlgA== 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=mAZsNAz9rX57qDjhaI5L4DRsQiSpZbIU43MbFP/PU9Y=; b=U8711IQ9GWhWZXFLEI7bMOfL+h/nKyam/EJbOk3n+g8Zyn53W96q4rh4d4tR0HKHBL3gM0Lff3z7YzgddSHbqVX39MixKrPGAWofPf2rYNzuWJ4KYu6uvocsa0H9iHGRlCXoQPh5OkTkamEm3Ee0AcFy/CtgjWFmQJbxHcLK+BvKnsk/9KhK0WGkBWmwXvigCXdIPLvoMGp+6dhSQi1f3h07EcV/krNitMRE0zcNNItF3YrrgoBvxbBnEoYujPMhPBHbNAavwNE5ghYcIAUjh+c68B0J/FoZ5t3AV4H40+9cbQgYawmXBBxrYOQ6j7B+IuBFZg6Jzzbup4N+xXPXjQ== 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=mAZsNAz9rX57qDjhaI5L4DRsQiSpZbIU43MbFP/PU9Y=; b=G31vd5bVu+s4CIlj7GvhbHrjspp8kLSJWvrLcxoSng4RSOtU5cm97BBWupsE3xVCHUgd8g5HvF+FsWnBF9jo+PpPSF5Uma5Gi33A+Y15Jjq6lFxC/e7ef4E/TBMS2Ze71menV/cWR2uawG7wk8USXN1lJxKDKr2JRlaSC4wsT2M= Received: from MN2PR04MB6061.namprd04.prod.outlook.com (20.178.246.15) by MN2PR04MB6208.namprd04.prod.outlook.com (20.178.248.211) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2136.16; Fri, 2 Aug 2019 07:48:44 +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 15.20.2136.010; Fri, 2 Aug 2019 07:48:43 +0000 From: Anup Patel To: Palmer Dabbelt , Paul Walmsley , Paolo Bonzini , Radim K Subject: [RFC PATCH v2 17/19] RISC-V: KVM: Add SBI v0.1 support Thread-Topic: [RFC PATCH v2 17/19] RISC-V: KVM: Add SBI v0.1 support Thread-Index: AQHVSQa1Rkael+9fmkqpDsQP+NHgHA== Date: Fri, 2 Aug 2019 07:48:43 +0000 Message-ID: <20190802074620.115029-18-anup.patel@wdc.com> References: <20190802074620.115029-1-anup.patel@wdc.com> In-Reply-To: <20190802074620.115029-1-anup.patel@wdc.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: PN1PR01CA0111.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c00::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: [106.51.20.161] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 39164e97-db5d-484d-2fa4-08d7171dd768 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:MN2PR04MB6208; x-ms-traffictypediagnostic: MN2PR04MB6208: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:6108; x-forefront-prvs: 011787B9DD x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(366004)(136003)(39860400002)(396003)(376002)(346002)(199004)(189003)(99286004)(7736002)(305945005)(9456002)(50226002)(2906002)(8936002)(14444005)(256004)(3846002)(14454004)(86362001)(5660300002)(6116002)(478600001)(53936002)(316002)(66446008)(64756008)(66476007)(66946007)(66556008)(6512007)(68736007)(81166006)(81156014)(102836004)(55236004)(76176011)(71190400001)(386003)(25786009)(6506007)(54906003)(71200400001)(110136005)(78486014)(476003)(8676002)(446003)(44832011)(66066001)(6436002)(52116002)(2616005)(1076003)(186003)(7416002)(486006)(36756003)(6486002)(4326008)(26005)(11346002); DIR:OUT; SFP:1102; SCL:1; SRVR:MN2PR04MB6208; H:MN2PR04MB6061.namprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: XBQVS2+Ui03vLUWcdxb/x/OhRJ379YWE2zqBGWFNFPab59VTBCQEg6jFgmEq5Nxr/INLEJ83joeclqvAUd5yC+ck4w74qLC3yXSw7DMplBRXvbmTQVi1BUP1FM4cGznl6j2+P2OO1Jnbd2NmfUfjL74fXOa8Ee+pyaqfsaUaiwMZnslA06XPsjJXhzrPVLv7YHXUIVBaPoHJG6v7DFeXHcyc15mM8x6gedvFak+Fh4jlfGg6JFhE2qzec+brok3AWYCT1nAEoGtIP/0417Es+ExsMOW1Ln3WPonjqljURU0Ld6b/PvWfR3sniUjkC+sLsRqnpaQG+gSrzJLlA2wrLSbDuHnI1/8vINF6AygkppVHhSpT/cso68Ds41I+OA7FCRXIl+RtHJX+h6Jh3D/ZvyE5D7Uig4Q64q7kPaCA46w= MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 39164e97-db5d-484d-2fa4-08d7171dd768 X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Aug 2019 07:48:43.3353 (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: MN2PR04MB6208 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190802_004849_930280_EAF4D058 X-CRM114-Status: GOOD ( 18.30 ) 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 From: Atish Patra The KVM host kernel running in HS-mode needs to handle SBI calls coming from guest kernel running in VS-mode. This patch adds SBI v0.1 support in KVM RISC-V. All the SBI calls are implemented correctly except remote tlb flushes. For remote TLB flushes, we are doing full TLB flush and this will be optimized in future. Signed-off-by: Atish Patra Signed-off-by: Anup Patel --- arch/riscv/include/asm/kvm_host.h | 2 + arch/riscv/kvm/Makefile | 2 +- arch/riscv/kvm/vcpu_exit.c | 3 + arch/riscv/kvm/vcpu_sbi.c | 119 ++++++++++++++++++++++++++++++ 4 files changed, 125 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/kvm/vcpu_sbi.c diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 08990ecd2260..edd9e6d2e811 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -223,4 +223,6 @@ bool kvm_riscv_vcpu_has_interrupt(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu); +int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu); + #endif /* __RISCV_KVM_HOST_H__ */ diff --git a/arch/riscv/kvm/Makefile b/arch/riscv/kvm/Makefile index 3e0c7558320d..b56dc1650d2c 100644 --- a/arch/riscv/kvm/Makefile +++ b/arch/riscv/kvm/Makefile @@ -9,6 +9,6 @@ ccflags-y := -Ivirt/kvm -Iarch/riscv/kvm kvm-objs := $(common-objs-y) kvm-objs += main.o vm.o vmid.o tlb.o mmu.o -kvm-objs += vcpu.o vcpu_exit.o vcpu_switch.o vcpu_timer.o +kvm-objs += vcpu.o vcpu_exit.o vcpu_switch.o vcpu_timer.o vcpu_sbi.o obj-$(CONFIG_KVM) += kvm.o diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c index f4ddf357ded8..96565fa19771 100644 --- a/arch/riscv/kvm/vcpu_exit.c +++ b/arch/riscv/kvm/vcpu_exit.c @@ -532,6 +532,9 @@ int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, (vcpu->arch.guest_context.hstatus & HSTATUS_STL)) ret = stage2_page_fault(vcpu, run, scause, stval); break; + case EXC_SUPERVISOR_SYSCALL: + if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV) + ret = kvm_riscv_vcpu_sbi_ecall(vcpu); default: break; }; diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c new file mode 100644 index 000000000000..5793202eb514 --- /dev/null +++ b/arch/riscv/kvm/vcpu_sbi.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * Copyright (c) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Atish Patra + */ + +#include +#include +#include +#include +#include + +#define SBI_VERSION_MAJOR 0 +#define SBI_VERSION_MINOR 1 + +/* TODO: Handle traps due to unpriv load and redirect it back to VS-mode */ +static unsigned long kvm_sbi_unpriv_load(const unsigned long *addr, + struct kvm_vcpu *vcpu) +{ + unsigned long flags, val; + unsigned long __hstatus, __sstatus; + + local_irq_save(flags); + __hstatus = csr_read(CSR_HSTATUS); + __sstatus = csr_read(CSR_SSTATUS); + csr_write(CSR_HSTATUS, vcpu->arch.guest_context.hstatus | HSTATUS_SPRV); + csr_write(CSR_SSTATUS, vcpu->arch.guest_context.sstatus); + val = *addr; + csr_write(CSR_HSTATUS, __hstatus); + csr_write(CSR_SSTATUS, __sstatus); + local_irq_restore(flags); + + return val; +} + +static void kvm_sbi_system_shutdown(struct kvm_vcpu *vcpu, u32 type) +{ + int i; + struct kvm_vcpu *tmp; + + kvm_for_each_vcpu(i, tmp, vcpu->kvm) + tmp->arch.power_off = true; + kvm_make_all_cpus_request(vcpu->kvm, KVM_REQ_SLEEP); + + memset(&vcpu->run->system_event, 0, sizeof(vcpu->run->system_event)); + vcpu->run->system_event.type = type; + vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; +} + +int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu) +{ + int ret = 1; + u64 next_cycle; + int vcpuid; + struct kvm_vcpu *remote_vcpu; + ulong dhart_mask; + struct kvm_cpu_context *cp = &vcpu->arch.guest_context; + + if (!cp) + return -EINVAL; + switch (cp->a7) { + case SBI_SET_TIMER: +#if __riscv_xlen == 32 + next_cycle = ((u64)cp->a1 << 32) | (u64)cp->a0; +#else + next_cycle = (u64)cp->a0; +#endif + kvm_riscv_vcpu_timer_next_event(vcpu, next_cycle); + break; + case SBI_CONSOLE_PUTCHAR: + /* Not implemented */ + cp->a0 = -ENOTSUPP; + break; + case SBI_CONSOLE_GETCHAR: + /* Not implemented */ + cp->a0 = -ENOTSUPP; + break; + case SBI_CLEAR_IPI: + kvm_riscv_vcpu_unset_interrupt(vcpu, IRQ_S_SOFT); + break; + case SBI_SEND_IPI: + dhart_mask = kvm_sbi_unpriv_load((unsigned long *)cp->a0, vcpu); + for_each_set_bit(vcpuid, &dhart_mask, BITS_PER_LONG) { + remote_vcpu = kvm_get_vcpu_by_id(vcpu->kvm, vcpuid); + kvm_riscv_vcpu_set_interrupt(remote_vcpu, IRQ_S_SOFT); + } + break; + case SBI_SHUTDOWN: + kvm_sbi_system_shutdown(vcpu, KVM_SYSTEM_EVENT_SHUTDOWN); + ret = 0; + break; + case SBI_REMOTE_FENCE_I: + sbi_remote_fence_i(NULL); + break; + /* + * TODO: There should be a way to call remote hfence.bvma. + * Preferred method is now a SBI call. Until then, just flush + * all tlbs. + */ + case SBI_REMOTE_SFENCE_VMA: + /*TODO: Parse vma range.*/ + sbi_remote_sfence_vma(NULL, 0, 0); + break; + case SBI_REMOTE_SFENCE_VMA_ASID: + /*TODO: Parse vma range for given ASID */ + sbi_remote_sfence_vma(NULL, 0, 0); + break; + default: + cp->a0 = ENOTSUPP; + break; + }; + + if (ret >= 0) + cp->sepc += 4; + + return ret; +} -- 2.17.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv