From patchwork Thu Aug 3 02:21:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 13339149 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E1ACC04A6A for ; Thu, 3 Aug 2023 02:23:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232875AbjHCCXb (ORCPT ); Wed, 2 Aug 2023 22:23:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233022AbjHCCWg (ORCPT ); Wed, 2 Aug 2023 22:22:36 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 7C8A435B5; Wed, 2 Aug 2023 19:22:04 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Cx7+tJD8tkNWkPAA--.34910S3; Thu, 03 Aug 2023 10:22:01 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Cx_c4yD8tk8oNGAA--.51268S14; Thu, 03 Aug 2023 10:21:55 +0800 (CST) From: Tianrui Zhao To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v18 12/30] LoongArch: KVM: Implement vcpu interrupt operations Date: Thu, 3 Aug 2023 10:21:20 +0800 Message-Id: <20230803022138.2736430-13-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230803022138.2736430-1-zhaotianrui@loongson.cn> References: <20230803022138.2736430-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Cx_c4yD8tk8oNGAA--.51268S14 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org 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. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/interrupt.c | 113 +++++++++++++++++++++++++++++++++ arch/loongarch/kvm/vcpu.c | 37 +++++++++++ 2 files changed, 150 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..14e19653b2bf --- /dev/null +++ b/arch/loongarch/kvm/interrupt.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include +#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 ... 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 ... 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 30326aa02a6e..4065a4a910a4 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -297,6 +297,43 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) preempt_enable(); } +int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) +{ + int intr = (int)irq->irq; + + if (intr > 0) + _kvm_queue_irq(vcpu, intr); + else if (intr < 0) + _kvm_dequeue_irq(vcpu, -intr); + else { + kvm_err("%s: invalid interrupt ioctl %d\n", __func__, irq->irq); + return -EINVAL; + } + + kvm_vcpu_kick(vcpu); + 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_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;