From patchwork Wed Apr 12 08:30:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 82330 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp182536vqo; Wed, 12 Apr 2023 02:20:23 -0700 (PDT) X-Google-Smtp-Source: AKy350aXKwgnvY0gVfn9iGDvSP3lrdrC2fNIp+bYh12eiQGkwgWrBNTkptuvxHBVsFhR4uS2V4Wx X-Received: by 2002:a17:906:57cb:b0:94a:88aa:e23d with SMTP id u11-20020a17090657cb00b0094a88aae23dmr2152274ejr.24.1681291223779; Wed, 12 Apr 2023 02:20:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1681291223; cv=none; d=google.com; s=arc-20160816; b=vGHGenknsqTZHa5rgvFBMhaY2TmpaC5kDVuCRj2xfiiPxMWRvzlnJ8MOXnlRZJX9V1 ApdcnoF6Wqjl1T7lY4bKEQOFH+Cbpqjx5dCUAI/uvZ7M55XVje6MpFyZEc1sKNodmEF3 q7hNfVaNpKaUQXrWV8zgh0z1keraUGPsjRBW+8XDSNwqE6eNEgwR3hBU70smeOzyUYj+ nkk0pI2bHAU8K9yrYX3kkRa2G4j1HOsiolm7remrn/Qx9rWpjh1lj4iZXBYmV25zj2kh EDph91/ezAFqQRROqFfoNDML2eHbjaarwRrTZAV0Uul8AZzoDtr13+du6h72aN5cHT6o cwTw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=QYRedWjalleBhYpiilhz6fQJV9NTA9og1AC88uUc18w=; b=cGhKjq+FjGd7TBTB1oeZZRxxgKzc9hWF+8YvmnMecV3Yfk2hfskaKGEFpjaih5sG8/ ysFVfRXMY1Py5CRgquIibSKvlu1UEJH41DMQkrLwwFCvhEy2tY/f67FiqFyZOSeTT4Sl 5BUxxye+iV6SwoekWPjIHtZU3GXcTkoyBwGqCeCndF8IvTXZpQiN6DEsIir0i/bt8vgU fTNkr2olbf+PDtDU2Meyd4qpaPvtHbze/Eh8x6OM/FPOhAlYjTQgKydZ46m6Lgq6fSG3 uNPuuwzIOwRzlb36z3bHg1wNacUFnoTejq30BOkY6OY4On7K51tcpXY4mhHhB5QS+nTD O13w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id lf18-20020a170906ae5200b0094a4c5804a8si8425185ejb.530.2023.04.12.02.20.00; Wed, 12 Apr 2023 02:20:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230238AbjDLIbX (ORCPT + 99 others); Wed, 12 Apr 2023 04:31:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230044AbjDLIaf (ORCPT ); Wed, 12 Apr 2023 04:30:35 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 81343E41; Wed, 12 Apr 2023 01:30:31 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxONkmbDZkciEbAA--.41991S3; Wed, 12 Apr 2023 16:30:30 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxC74fbDZkdKwgAA--.35751S14; Wed, 12 Apr 2023 16:30:29 +0800 (CST) From: Tianrui Zhao To: Paolo Bonzini Cc: Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v6 12/30] LoongArch: KVM: Implement vcpu interrupt operations Date: Wed, 12 Apr 2023 16:30:05 +0800 Message-Id: <20230412083023.1693910-13-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230412083023.1693910-1-zhaotianrui@loongson.cn> References: <20230412083023.1693910-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxC74fbDZkdKwgAA--.35751S14 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxCrWfAr1fKFWkWry3Gr1rJFb_yoWrKw4UpF W8Cw45Xw48Gr17G343ZFnY9r1Yqr1kKFZxGr97C3y3K347tr95XFyvyr98XF1UGw4UKF1f X34SvaykCa45JwUanT9S1TB71UUUUbUqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU b4AFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6x kF7I0E14v26F4UJVW0owAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r1q 6r43MxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWDJVCq3wCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr1j6F4UJwCI42IY6I8E87Iv6x kF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7xREWSoJUUUUU== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1762961626239315082?= X-GMAIL-MSGID: =?utf-8?q?1762961626239315082?= Implement vcpu interrupt operations such as vcpu set irq and vcpu clear irq, using set_gcsr_estat to set irq which is parsed by the irq bitmap. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/interrupt.c | 126 +++++++++++++++++++++++++++++++++ arch/loongarch/kvm/vcpu.c | 45 ++++++++++++ 2 files changed, 171 insertions(+) create mode 100644 arch/loongarch/kvm/interrupt.c diff --git a/arch/loongarch/kvm/interrupt.c b/arch/loongarch/kvm/interrupt.c new file mode 100644 index 000000000000..02267a71d1aa --- /dev/null +++ b/arch/loongarch/kvm/interrupt.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include + +static unsigned int int_to_coreint[LOONGARCH_EXC_MAX] = { + [LARCH_INT_TIMER] = CPU_TIMER, + [LARCH_INT_IPI] = CPU_IPI, + [LARCH_INT_SIP0] = CPU_SIP0, + [LARCH_INT_SIP1] = CPU_SIP1, + [LARCH_INT_IP0] = CPU_IP0, + [LARCH_INT_IP1] = CPU_IP1, + [LARCH_INT_IP2] = CPU_IP2, + [LARCH_INT_IP3] = CPU_IP3, + [LARCH_INT_IP4] = CPU_IP4, + [LARCH_INT_IP5] = CPU_IP5, + [LARCH_INT_IP6] = CPU_IP6, + [LARCH_INT_IP7] = CPU_IP7, +}; + +static int _kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int priority) +{ + unsigned int irq = 0; + + clear_bit(priority, &vcpu->arch.irq_pending); + if (priority < LOONGARCH_EXC_MAX) + irq = int_to_coreint[priority]; + + switch (priority) { + case LARCH_INT_TIMER: + case LARCH_INT_IPI: + case LARCH_INT_SIP0: + case LARCH_INT_SIP1: + set_gcsr_estat(irq); + break; + + case LARCH_INT_IP0: + case LARCH_INT_IP1: + case LARCH_INT_IP2: + case LARCH_INT_IP3: + case LARCH_INT_IP4: + case LARCH_INT_IP5: + case LARCH_INT_IP6: + case LARCH_INT_IP7: + set_csr_gintc(irq); + break; + + default: + break; + } + + return 1; +} + +static int _kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority) +{ + unsigned int irq = 0; + + clear_bit(priority, &vcpu->arch.irq_clear); + if (priority < LOONGARCH_EXC_MAX) + irq = int_to_coreint[priority]; + + switch (priority) { + case LARCH_INT_TIMER: + case LARCH_INT_IPI: + case LARCH_INT_SIP0: + case LARCH_INT_SIP1: + clear_gcsr_estat(irq); + break; + + case LARCH_INT_IP0: + case LARCH_INT_IP1: + case LARCH_INT_IP2: + case LARCH_INT_IP3: + case LARCH_INT_IP4: + case LARCH_INT_IP5: + case LARCH_INT_IP6: + case LARCH_INT_IP7: + clear_csr_gintc(irq); + break; + + default: + break; + } + + return 1; +} + +void _kvm_deliver_intr(struct kvm_vcpu *vcpu) +{ + unsigned long *pending = &vcpu->arch.irq_pending; + unsigned long *pending_clr = &vcpu->arch.irq_clear; + unsigned int priority; + + if (!(*pending) && !(*pending_clr)) + return; + + if (*pending_clr) { + priority = __ffs(*pending_clr); + while (priority <= LOONGARCH_EXC_IPNUM) { + _kvm_irq_clear(vcpu, priority); + priority = find_next_bit(pending_clr, + BITS_PER_BYTE * sizeof(*pending_clr), + priority + 1); + } + } + + if (*pending) { + priority = __ffs(*pending); + while (priority <= LOONGARCH_EXC_IPNUM) { + _kvm_irq_deliver(vcpu, priority); + priority = find_next_bit(pending, + BITS_PER_BYTE * sizeof(*pending), + priority + 1); + } + } +} + +int _kvm_pending_timer(struct kvm_vcpu *vcpu) +{ + return test_bit(LARCH_INT_TIMER, &vcpu->arch.irq_pending); +} diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index d1e8cd402900..ee648bdb657c 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -305,6 +305,51 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) preempt_enable(); } +int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, + struct kvm_loongarch_interrupt *irq) +{ + int intr = (int)irq->irq; + struct kvm_vcpu *dvcpu = NULL; + + if (irq->cpu == -1) + dvcpu = vcpu; + else + dvcpu = kvm_get_vcpu(vcpu->kvm, irq->cpu); + + if (intr > 0) + _kvm_queue_irq(dvcpu, intr); + else if (intr < 0) + _kvm_dequeue_irq(dvcpu, -intr); + else { + kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__, + irq->cpu, irq->irq); + return -EINVAL; + } + + kvm_vcpu_kick(dvcpu); + return 0; +} + +long kvm_arch_vcpu_async_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + struct kvm_vcpu *vcpu = filp->private_data; + void __user *argp = (void __user *)arg; + + if (ioctl == KVM_INTERRUPT) { + struct kvm_loongarch_interrupt irq; + + if (copy_from_user(&irq, argp, sizeof(irq))) + return -EFAULT; + kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__, + irq.irq); + + return kvm_vcpu_ioctl_interrupt(vcpu, &irq); + } + + return -ENOIOCTLCMD; +} + int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) { return 0;