1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
4 *
5 * Authors:
6 * Anup Patel <anup.patel@wdc.com>
7 */
8
9 #include <linux/errno.h>
10 #include <linux/err.h>
11 #include <linux/module.h>
12 #include <linux/uaccess.h>
13 #include <linux/kvm_host.h>
14
15 const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
16 KVM_GENERIC_VM_STATS()
17 };
18 static_assert(ARRAY_SIZE(kvm_vm_stats_desc) ==
19 sizeof(struct kvm_vm_stat) / sizeof(u64));
20
21 const struct kvm_stats_header kvm_vm_stats_header = {
22 .name_size = KVM_STATS_NAME_SIZE,
23 .num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
24 .id_offset = sizeof(struct kvm_stats_header),
25 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
26 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
27 sizeof(kvm_vm_stats_desc),
28 };
29
kvm_arch_init_vm(struct kvm * kvm,unsigned long type)30 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
31 {
32 int r;
33
34 r = kvm_riscv_gstage_alloc_pgd(kvm);
35 if (r)
36 return r;
37
38 r = kvm_riscv_gstage_vmid_init(kvm);
39 if (r) {
40 kvm_riscv_gstage_free_pgd(kvm);
41 return r;
42 }
43
44 kvm_riscv_guest_timer_init(kvm);
45
46 return 0;
47 }
48
kvm_arch_destroy_vm(struct kvm * kvm)49 void kvm_arch_destroy_vm(struct kvm *kvm)
50 {
51 kvm_destroy_vcpus(kvm);
52 }
53
kvm_vm_ioctl_check_extension(struct kvm * kvm,long ext)54 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
55 {
56 int r;
57
58 switch (ext) {
59 case KVM_CAP_IOEVENTFD:
60 case KVM_CAP_DEVICE_CTRL:
61 case KVM_CAP_USER_MEMORY:
62 case KVM_CAP_SYNC_MMU:
63 case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
64 case KVM_CAP_ONE_REG:
65 case KVM_CAP_READONLY_MEM:
66 case KVM_CAP_MP_STATE:
67 case KVM_CAP_IMMEDIATE_EXIT:
68 r = 1;
69 break;
70 case KVM_CAP_NR_VCPUS:
71 r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
72 break;
73 case KVM_CAP_MAX_VCPUS:
74 r = KVM_MAX_VCPUS;
75 break;
76 case KVM_CAP_NR_MEMSLOTS:
77 r = KVM_USER_MEM_SLOTS;
78 break;
79 case KVM_CAP_VM_GPA_BITS:
80 r = kvm_riscv_gstage_gpa_bits();
81 break;
82 default:
83 r = 0;
84 break;
85 }
86
87 return r;
88 }
89
kvm_arch_vm_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)90 long kvm_arch_vm_ioctl(struct file *filp,
91 unsigned int ioctl, unsigned long arg)
92 {
93 return -EINVAL;
94 }
95
