90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2024 Loongson Technology Corporation Limited
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*/
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#include <linux/kvm_host.h>
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#include <trace/events/kvm.h>
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#include <asm/kvm_pch_pic.h>
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static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
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struct kvm *kvm, int irq_source_id, int level, bool line_status)
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{
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/* PCH-PIC pin (0 ~ 64) <---> GSI (0 ~ 64) */
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pch_pic_set_irq(kvm->arch.pch_pic, e->irqchip.pin, level);
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return 0;
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}
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/*
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* kvm_set_msi: inject the MSI corresponding to the
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* MSI routing entry
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*
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* This is the entry point for irqfd MSI injection
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* and userspace MSI injection.
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*/
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int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
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struct kvm *kvm, int irq_source_id, int level, bool line_status)
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{
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if (!level)
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return -1;
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pch_msi_set_irq(kvm, e->msi.data, level);
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return 0;
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}
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/*
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* kvm_set_routing_entry: populate a kvm routing entry
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* from a user routing entry
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*
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* @kvm: the VM this entry is applied to
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* @e: kvm kernel routing entry handle
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* @ue: user api routing entry handle
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* return 0 on success, -EINVAL on errors.
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*/
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int kvm_set_routing_entry(struct kvm *kvm,
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struct kvm_kernel_irq_routing_entry *e,
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const struct kvm_irq_routing_entry *ue)
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{
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switch (ue->type) {
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case KVM_IRQ_ROUTING_IRQCHIP:
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e->set = kvm_set_pic_irq;
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e->irqchip.irqchip = ue->u.irqchip.irqchip;
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e->irqchip.pin = ue->u.irqchip.pin;
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if (e->irqchip.pin >= KVM_IRQCHIP_NUM_PINS)
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return -EINVAL;
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return 0;
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case KVM_IRQ_ROUTING_MSI:
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e->set = kvm_set_msi;
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e->msi.address_lo = ue->u.msi.address_lo;
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e->msi.address_hi = ue->u.msi.address_hi;
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e->msi.data = ue->u.msi.data;
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return 0;
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default:
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return -EINVAL;
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}
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}
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int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
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struct kvm *kvm, int irq_source_id, int level, bool line_status)
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{
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switch (e->type) {
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case KVM_IRQ_ROUTING_IRQCHIP:
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pch_pic_set_irq(kvm->arch.pch_pic, e->irqchip.pin, level);
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return 0;
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case KVM_IRQ_ROUTING_MSI:
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pch_msi_set_irq(kvm, e->msi.data, level);
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return 0;
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default:
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return -EWOULDBLOCK;
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}
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}
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bool kvm_arch_intc_initialized(struct kvm *kvm)
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{
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return kvm_arch_irqchip_in_kernel(kvm);
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}
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