tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
15const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
16 KVM_GENERIC_VM_STATS()
17};
18static_assert(ARRAY_SIZE(kvm_vm_stats_desc) ==
19 sizeof(struct kvm_vm_stat) / sizeof(u64));
20
21const 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
30int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
31{
32 int r;
33
34 r = kvm_riscv_stage2_alloc_pgd(kvm);
35 if (r)
36 return r;
37
38 r = kvm_riscv_stage2_vmid_init(kvm);
39 if (r) {
40 kvm_riscv_stage2_free_pgd(kvm);
41 return r;
42 }
43
44 return kvm_riscv_guest_timer_init(kvm);
45}
46
47void kvm_arch_destroy_vm(struct kvm *kvm)
48{
49 int i;
50
51 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
52 if (kvm->vcpus[i]) {
53 kvm_vcpu_destroy(kvm->vcpus[i]);
54 kvm->vcpus[i] = NULL;
55 }
56 }
57 atomic_set(&kvm->online_vcpus, 0);
58}
59
60int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
61{
62 int r;
63
64 switch (ext) {
65 case KVM_CAP_IOEVENTFD:
66 case KVM_CAP_DEVICE_CTRL:
67 case KVM_CAP_USER_MEMORY:
68 case KVM_CAP_SYNC_MMU:
69 case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
70 case KVM_CAP_ONE_REG:
71 case KVM_CAP_READONLY_MEM:
72 case KVM_CAP_MP_STATE:
73 case KVM_CAP_IMMEDIATE_EXIT:
74 r = 1;
75 break;
76 case KVM_CAP_NR_VCPUS:
77 r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
78 break;
79 case KVM_CAP_MAX_VCPUS:
80 r = KVM_MAX_VCPUS;
81 break;
82 case KVM_CAP_NR_MEMSLOTS:
83 r = KVM_USER_MEM_SLOTS;
84 break;
85 default:
86 r = 0;
87 break;
88 }
89
90 return r;
91}
92
93long kvm_arch_vm_ioctl(struct file *filp,
94 unsigned int ioctl, unsigned long arg)
95{
96 return -EINVAL;
97}