cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vm.c (1971B)

      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_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	return kvm_riscv_guest_timer_init(kvm);
     45}
     46
     47void kvm_arch_destroy_vm(struct kvm *kvm)
     48{
     49	kvm_destroy_vcpus(kvm);
     50}
     51
     52int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
     53{
     54	int r;
     55
     56	switch (ext) {
     57	case KVM_CAP_IOEVENTFD:
     58	case KVM_CAP_DEVICE_CTRL:
     59	case KVM_CAP_USER_MEMORY:
     60	case KVM_CAP_SYNC_MMU:
     61	case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
     62	case KVM_CAP_ONE_REG:
     63	case KVM_CAP_READONLY_MEM:
     64	case KVM_CAP_MP_STATE:
     65	case KVM_CAP_IMMEDIATE_EXIT:
     66		r = 1;
     67		break;
     68	case KVM_CAP_NR_VCPUS:
     69		r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
     70		break;
     71	case KVM_CAP_MAX_VCPUS:
     72		r = KVM_MAX_VCPUS;
     73		break;
     74	case KVM_CAP_NR_MEMSLOTS:
     75		r = KVM_USER_MEM_SLOTS;
     76		break;
     77	case KVM_CAP_VM_GPA_BITS:
     78		r = kvm_riscv_gstage_gpa_bits();
     79		break;
     80	default:
     81		r = 0;
     82		break;
     83	}
     84
     85	return r;
     86}
     87
     88long kvm_arch_vm_ioctl(struct file *filp,
     89		       unsigned int ioctl, unsigned long arg)
     90{
     91	return -EINVAL;
     92}