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[2620:137:e000::1:20]) by mx.google.com with ESMTP id v12-20020a63bf0c000000b005139e210d10si933854pgf.587.2023.05.09.00.55.34; Tue, 09 May 2023 00:55:52 -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 S234834AbjEIHyb (ORCPT + 99 others); Tue, 9 May 2023 03:54:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234593AbjEIHx4 (ORCPT ); Tue, 9 May 2023 03:53:56 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DAC3D1FC2; Tue, 9 May 2023 00:53:54 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8DxCeoR_FlkBOMGAA--.11463S3; Tue, 09 May 2023 15:53:53 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxFLUK_FlkIEhSAA--.16908S14; Tue, 09 May 2023 15:53:53 +0800 (CST) From: Tianrui Zhao To: Paolo Bonzini , Huacai Chen , WANG Xuerui Cc: 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 v9 12/30] LoongArch: KVM: Implement vcpu interrupt operations Date: Tue, 9 May 2023 15:53:28 +0800 Message-Id: <20230509075346.1023386-13-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230509075346.1023386-1-zhaotianrui@loongson.cn> References: <20230509075346.1023386-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxFLUK_FlkIEhSAA--.16908S14 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxCrWfAr1fKw17tFyUXF45GFg_yoWruF4Upr W8C3y5Zw4fJry7K343GanY9r4Yv3yvgrW7XrZ3t343KwnrtFn0vF1xKr98JFy7Gw4kGF1S gFWa9FWDCF4DJw7anT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj 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=1.4 required=5.0 tests=BAYES_00,RCVD_IN_SBL_CSS, SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: * 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?1765402426534165970?= X-GMAIL-MSGID: =?utf-8?q?1765402426534165970?= 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..c05177bad3d4 --- /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[EXCCODE_INT_NUM] = { + [INT_TI] = CPU_TIMER, + [INT_IPI] = CPU_IPI, + [INT_SWI0] = CPU_SIP0, + [INT_SWI1] = CPU_SIP1, + [INT_HWI0] = CPU_IP0, + [INT_HWI1] = CPU_IP1, + [INT_HWI2] = CPU_IP2, + [INT_HWI3] = CPU_IP3, + [INT_HWI4] = CPU_IP4, + [INT_HWI5] = CPU_IP5, + [INT_HWI6] = CPU_IP6, + [INT_HWI7] = 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 < EXCCODE_INT_NUM) + irq = int_to_coreint[priority]; + + switch (priority) { + case INT_TI: + case INT_IPI: + case INT_SWI0: + case INT_SWI1: + set_gcsr_estat(irq); + break; + + case INT_HWI0: + case INT_HWI1: + case INT_HWI2: + case INT_HWI3: + case INT_HWI4: + case INT_HWI5: + case INT_HWI6: + case INT_HWI7: + 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 < EXCCODE_INT_NUM) + irq = int_to_coreint[priority]; + + switch (priority) { + case INT_TI: + case INT_IPI: + case INT_SWI0: + case INT_SWI1: + clear_gcsr_estat(irq); + break; + + case INT_HWI0: + case INT_HWI1: + case INT_HWI2: + case INT_HWI3: + case INT_HWI4: + case INT_HWI5: + case INT_HWI6: + case INT_HWI7: + 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 <= INT_IPI) { + _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 <= INT_IPI) { + _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(INT_TI, &vcpu->arch.irq_pending); +} diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 60213f7f7bac..f661743dbe66 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -304,6 +304,51 @@ 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;