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