diff options
Diffstat (limited to 'arch/riscv/kvm/vm.c')
| -rw-r--r-- | arch/riscv/kvm/vm.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c new file mode 100644 index 000000000000..ce58bc48e5b8 --- /dev/null +++ b/arch/riscv/kvm/vm.c @@ -0,0 +1,214 @@ +// 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: + 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; +} |