From patchwork Tue Mar 28 12:31:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 76058 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp2188218vqo; Tue, 28 Mar 2023 05:48:58 -0700 (PDT) X-Google-Smtp-Source: AKy350ZP1G71EdDHhRZtEbgex1zqM8FmJwDuuiUizNL3xdLUroWEcn3TfBT+/f60oVF0+7Rdx/17 X-Received: by 2002:a17:907:2c78:b0:8ee:babc:d40b with SMTP id ib24-20020a1709072c7800b008eebabcd40bmr14799622ejc.58.1680007738313; Tue, 28 Mar 2023 05:48:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1680007738; cv=none; d=google.com; s=arc-20160816; b=Zg8gDXT97f7wFiuPGYIZ77HLJwSA1BL5gxA4uG6yiFu1PkrkVP2HEjRWlJNvkbJcR8 k820DMEFOBFUzXsDlbYBaQWuF9ihQCaySYHuPRT098SJBIqX4tKJZRZkixbCx5AlJrrN 87kBORrnTh7OWzLaRG0xlZwZwOhjJ1OjdcotAaiDjNhiw+hskTytwiKGB1quizZemHLE MtaQXjX0wvxzKv5tqnWwf+yF/6ld4SxYahXtU2nAo6fTt2veOD94rax/IIsOgYB/sit/ WHDsHzDGxT/cl8G/Y1Qa6DPF6SivajGRAq+fF4cNXiQiyTjivU/R2RLXYqvTmYbNoFHm 1kGQ== 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=iP6SLSMmsJp1JrTuGCtnjIOF6/HI/4w4iaLCwHpc06w=; b=ie4HWQab1M9QXvpCNlpIZXAXCn2sYVLRVOg1fTGAqStYJOWvtO3Ga5ix0YVrftDe3G aaJa/M3d2kbI53tn5JQqkq/P6pZcTXrkx+2jvTPOJMbFEtu2jWSsUl8mpI6vUktHMWPl A0iMwwGV51W5NsLOzj2WlA0VDEVUxVxnHPZL36qYBAi02JcKwwdCozT3CrKf9EAwOxmd 675fibwo4JCve6D4pXJG/HEbD78N5baJpKVxlJ7Q8TbuTWxtqNjlczi/RQTSmf5oIrUv GnuEMydUfr1ptntDA9j3V+9LyseyKs24cTJg4p7QA938UCxwSPVB4rnU8VUvafQlTdyV +M0g== 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 pj8-20020a170906d78800b008b17853ac3dsi28434713ejb.801.2023.03.28.05.48.33; Tue, 28 Mar 2023 05:48:58 -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 S232648AbjC1MhK (ORCPT + 99 others); Tue, 28 Mar 2023 08:37:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229811AbjC1MhI (ORCPT ); Tue, 28 Mar 2023 08:37:08 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 29481A5CF; Tue, 28 Mar 2023 05:36:41 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Cxjdob3iJkGRkTAA--.17789S3; Tue, 28 Mar 2023 20:31:23 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8CxPL4X3iJku2cPAA--.12046S14; Tue, 28 Mar 2023 20:31:22 +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: [PING PATCH v4 12/29] LoongArch: KVM: Implement vcpu interrupt operations Date: Tue, 28 Mar 2023 20:31:02 +0800 Message-Id: <20230328123119.3649361-13-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230328123119.3649361-1-zhaotianrui@loongson.cn> References: <20230328123119.3649361-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8CxPL4X3iJku2cPAA--.12046S14 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxCrWfAr1fKFWkWry3Gr1rJFb_yoWrKFWDpF W8Cw45Xw48Gr17G343ZFnYvr4Yqr1kKFZxCr97C3y3K347tr95XFyvyr98XF1UGw4UKF1f X34SqaykCa45JwUanT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU b4AFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6x kF7I0E14v26F4UJVW0owAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWDJVCq3wCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr1j6F4UJwCI42IY6I8E87Iv6x kF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7xRiTKZJUUUUU== X-Spam-Status: No, score=-0.0 required=5.0 tests=SPF_HELO_PASS,SPF_PASS autolearn=unavailable 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?1761615793797647055?= X-GMAIL-MSGID: =?utf-8?q?1761615793797647055?= 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 000000000..02267a71d --- /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 2709ab43d..4c3b41fd1 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -327,6 +327,51 @@ 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;