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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/kvm_host.h>
const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
KVM_GENERIC_VM_STATS()
};
static_assert(ARRAY_SIZE(kvm_vm_stats_desc) ==
sizeof(struct kvm_vm_stat) / sizeof(u64));
const struct kvm_stats_header kvm_vm_stats_header = {
.name_size = KVM_STATS_NAME_SIZE,
.num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
.id_offset = sizeof(struct kvm_stats_header),
.desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
.data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
sizeof(kvm_vm_stats_desc),
};
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
int r;
r = kvm_riscv_gstage_alloc_pgd(kvm);
if (r)
return r;
r = kvm_riscv_gstage_vmid_init(kvm);
if (r) {
kvm_riscv_gstage_free_pgd(kvm);
return r;
}
kvm_riscv_aia_init_vm(kvm);
kvm_riscv_guest_timer_init(kvm);
return 0;
}
void kvm_arch_destroy_vm(struct kvm *kvm)
{
kvm_destroy_vcpus(kvm);
kvm_riscv_aia_destroy_vm(kvm);
}
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irql,
bool line_status)
{
if (!irqchip_in_kernel(kvm))
return -ENXIO;
return kvm_riscv_aia_inject_irq(kvm, irql->irq, irql->level);
}
int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id,
int level, bool line_status)
{
struct kvm_msi msi;
if (!level)
return -1;
msi.address_lo = e->msi.address_lo;
msi.address_hi = e->msi.address_hi;
msi.data = e->msi.data;
msi.flags = e->msi.flags;
msi.devid = e->msi.devid;
return kvm_riscv_aia_inject_msi(kvm, &msi);
}
static int kvm_riscv_set_irq(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id,
int level, bool line_status)
{
return kvm_riscv_aia_inject_irq(kvm, e->irqchip.pin, level);
}
int kvm_riscv_setup_default_irq_routing(struct kvm *kvm, u32 lines)
{
struct kvm_irq_routing_entry *ents;
int i, rc;
ents = kcalloc(lines, sizeof(*ents), GFP_KERNEL);
if (!ents)
return -ENOMEM;
for (i = 0; i < lines; i++) {
ents[i].gsi = i;
ents[i].type = KVM_IRQ_ROUTING_IRQCHIP;
ents[i].u.irqchip.irqchip = 0;
ents[i].u.irqchip.pin = i;
}
rc = kvm_set_irq_routing(kvm, ents, lines, 0);
kfree(ents);
return rc;
}
bool kvm_arch_can_set_irq_routing(struct kvm *kvm)
{
return irqchip_in_kernel(kvm);
}
int kvm_set_routing_entry(struct kvm *kvm,
struct kvm_kernel_irq_routing_entry *e,
const struct kvm_irq_routing_entry *ue)
{
int r = -EINVAL;
switch (ue->type) {
case KVM_IRQ_ROUTING_IRQCHIP:
e->set = kvm_riscv_set_irq;
e->irqchip.irqchip = ue->u.irqchip.irqchip;
e->irqchip.pin = ue->u.irqchip.pin;
if ((e->irqchip.pin >= KVM_IRQCHIP_NUM_PINS) ||
(e->irqchip.irqchip >= KVM_NR_IRQCHIPS))
goto out;
break;
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;
e->msi.flags = ue->flags;
e->msi.devid = ue->u.msi.devid;
break;
default:
goto out;
}
r = 0;
out:
return r;
}
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)
{
if (!level)
return -EWOULDBLOCK;
switch (e->type) {
case KVM_IRQ_ROUTING_MSI:
return kvm_set_msi(e, kvm, irq_source_id, level, line_status);
case KVM_IRQ_ROUTING_IRQCHIP:
return kvm_riscv_set_irq(e, kvm, irq_source_id,
level, line_status);
}
return -EWOULDBLOCK;
}
bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
{
return irqchip_in_kernel(kvm);
}
int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
{
int r;
switch (ext) {
case KVM_CAP_IRQCHIP:
r = kvm_riscv_aia_available();
break;
case KVM_CAP_IOEVENTFD:
case KVM_CAP_USER_MEMORY:
case KVM_CAP_SYNC_MMU:
case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
case KVM_CAP_ONE_REG:
case KVM_CAP_READONLY_MEM:
case KVM_CAP_MP_STATE:
case KVM_CAP_IMMEDIATE_EXIT:
case KVM_CAP_SET_GUEST_DEBUG:
r = 1;
break;
case KVM_CAP_NR_VCPUS:
r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
break;
case KVM_CAP_MAX_VCPUS:
r = KVM_MAX_VCPUS;
break;
case KVM_CAP_NR_MEMSLOTS:
r = KVM_USER_MEM_SLOTS;
break;
case KVM_CAP_VM_GPA_BITS:
r = kvm_riscv_gstage_gpa_bits();
break;
default:
r = 0;
break;
}
return r;
}
int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
{
return -EINVAL;
}
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