1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
6 #include <linux/kvm_host.h>
7 #include <asm/kvm_mmu.h>
9 const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
10 KVM_GENERIC_VM_STATS(),
11 STATS_DESC_ICOUNTER(VM, pages),
12 STATS_DESC_ICOUNTER(VM, hugepages),
15 const struct kvm_stats_header kvm_vm_stats_header = {
16 .name_size = KVM_STATS_NAME_SIZE,
17 .num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
18 .id_offset = sizeof(struct kvm_stats_header),
19 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
20 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
21 sizeof(kvm_vm_stats_desc),
24 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
28 /* Allocate page table to map GPA -> RPA */
29 kvm->arch.pgd = kvm_pgd_alloc();
34 kvm->arch.gpa_size = BIT(cpu_vabits - 1);
35 kvm->arch.root_level = CONFIG_PGTABLE_LEVELS - 1;
36 kvm->arch.invalid_ptes[0] = 0;
37 kvm->arch.invalid_ptes[1] = (unsigned long)invalid_pte_table;
38 #if CONFIG_PGTABLE_LEVELS > 2
39 kvm->arch.invalid_ptes[2] = (unsigned long)invalid_pmd_table;
41 #if CONFIG_PGTABLE_LEVELS > 3
42 kvm->arch.invalid_ptes[3] = (unsigned long)invalid_pud_table;
44 for (i = 0; i <= kvm->arch.root_level; i++)
45 kvm->arch.pte_shifts[i] = PAGE_SHIFT + i * (PAGE_SHIFT - 3);
50 void kvm_arch_destroy_vm(struct kvm *kvm)
52 kvm_destroy_vcpus(kvm);
53 free_page((unsigned long)kvm->arch.pgd);
57 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
63 case KVM_CAP_ENABLE_CAP:
64 case KVM_CAP_READONLY_MEM:
65 case KVM_CAP_SYNC_MMU:
66 case KVM_CAP_IMMEDIATE_EXIT:
67 case KVM_CAP_IOEVENTFD:
68 case KVM_CAP_MP_STATE:
71 case KVM_CAP_NR_VCPUS:
72 r = num_online_cpus();
74 case KVM_CAP_MAX_VCPUS:
77 case KVM_CAP_MAX_VCPU_ID:
80 case KVM_CAP_NR_MEMSLOTS:
81 r = KVM_USER_MEM_SLOTS;
91 int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)