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
9const 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
15const 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),
22};
23
24int 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
50void 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
57int 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
91int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
92{
93	return -ENOIOCTLCMD;
94}
95