1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (C) 2020-2023 Loongson Technology Corporation Limited |
4 | */ |
5 | |
6 | #include <linux/kvm_host.h> |
7 | #include <asm/kvm_mmu.h> |
8 | |
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), |
13 | }; |
14 | |
15 | const struct kvm_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), |
22 | }; |
23 | |
24 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
25 | { |
26 | int i; |
27 | |
28 | /* Allocate page table to map GPA -> RPA */ |
29 | kvm->arch.pgd = kvm_pgd_alloc(); |
30 | if (!kvm->arch.pgd) |
31 | return -ENOMEM; |
32 | |
33 | kvm_init_vmcs(kvm); |
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; |
40 | #endif |
41 | #if CONFIG_PGTABLE_LEVELS > 3 |
42 | kvm->arch.invalid_ptes[3] = (unsigned long)invalid_pud_table; |
43 | #endif |
44 | for (i = 0; i <= kvm->arch.root_level; i++) |
45 | kvm->arch.pte_shifts[i] = PAGE_SHIFT + i * (PAGE_SHIFT - 3); |
46 | |
47 | return 0; |
48 | } |
49 | |
50 | void kvm_arch_destroy_vm(struct kvm *kvm) |
51 | { |
52 | kvm_destroy_vcpus(kvm); |
53 | free_page((unsigned long)kvm->arch.pgd); |
54 | kvm->arch.pgd = NULL; |
55 | } |
56 | |
57 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
58 | { |
59 | int r; |
60 | |
61 | switch (ext) { |
62 | case KVM_CAP_ONE_REG: |
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: |
69 | r = 1; |
70 | break; |
71 | case KVM_CAP_NR_VCPUS: |
72 | r = num_online_cpus(); |
73 | break; |
74 | case KVM_CAP_MAX_VCPUS: |
75 | r = KVM_MAX_VCPUS; |
76 | break; |
77 | case KVM_CAP_MAX_VCPU_ID: |
78 | r = KVM_MAX_VCPU_IDS; |
79 | break; |
80 | case KVM_CAP_NR_MEMSLOTS: |
81 | r = KVM_USER_MEM_SLOTS; |
82 | break; |
83 | default: |
84 | r = 0; |
85 | break; |
86 | } |
87 | |
88 | return r; |
89 | } |
90 | |
91 | int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) |
92 | { |
93 | return -ENOIOCTLCMD; |
94 | } |
95 | |