| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2020-2023 Loongson Technology Corporation Limited |
| */ |
| |
| #include <linux/kvm_host.h> |
| #include <asm/kvm_mmu.h> |
| |
| const struct _kvm_stats_desc kvm_vm_stats_desc[] = { |
| KVM_GENERIC_VM_STATS(), |
| STATS_DESC_ICOUNTER(VM, pages), |
| STATS_DESC_ICOUNTER(VM, hugepages), |
| }; |
| |
| const struct kvm_stats_header kvm_vm_stats_header = { |
| .name_size = KVM_STATS_NAME_SIZE, |
| .num_desc = ARRAY_SIZE(kvm_vm_stats_desc), |
| .id_offset = sizeof(struct kvm_stats_header), |
| .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, |
| .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + |
| sizeof(kvm_vm_stats_desc), |
| }; |
| |
| int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
| { |
| int i; |
| |
| /* Allocate page table to map GPA -> RPA */ |
| kvm->arch.pgd = kvm_pgd_alloc(); |
| if (!kvm->arch.pgd) |
| return -ENOMEM; |
| |
| kvm->arch.phyid_map = kvzalloc(sizeof(struct kvm_phyid_map), GFP_KERNEL_ACCOUNT); |
| if (!kvm->arch.phyid_map) { |
| free_page((unsigned long)kvm->arch.pgd); |
| kvm->arch.pgd = NULL; |
| return -ENOMEM; |
| } |
| spin_lock_init(&kvm->arch.phyid_map_lock); |
| |
| kvm_init_vmcs(kvm); |
| kvm->arch.gpa_size = BIT(cpu_vabits - 1); |
| kvm->arch.root_level = CONFIG_PGTABLE_LEVELS - 1; |
| kvm->arch.invalid_ptes[0] = 0; |
| kvm->arch.invalid_ptes[1] = (unsigned long)invalid_pte_table; |
| #if CONFIG_PGTABLE_LEVELS > 2 |
| kvm->arch.invalid_ptes[2] = (unsigned long)invalid_pmd_table; |
| #endif |
| #if CONFIG_PGTABLE_LEVELS > 3 |
| kvm->arch.invalid_ptes[3] = (unsigned long)invalid_pud_table; |
| #endif |
| for (i = 0; i <= kvm->arch.root_level; i++) |
| kvm->arch.pte_shifts[i] = PAGE_SHIFT + i * (PAGE_SHIFT - 3); |
| |
| return 0; |
| } |
| |
| void kvm_arch_destroy_vm(struct kvm *kvm) |
| { |
| kvm_destroy_vcpus(kvm); |
| free_page((unsigned long)kvm->arch.pgd); |
| kvm->arch.pgd = NULL; |
| kvfree(kvm->arch.phyid_map); |
| kvm->arch.phyid_map = NULL; |
| } |
| |
| int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
| { |
| int r; |
| |
| switch (ext) { |
| case KVM_CAP_ONE_REG: |
| case KVM_CAP_ENABLE_CAP: |
| case KVM_CAP_READONLY_MEM: |
| case KVM_CAP_SYNC_MMU: |
| case KVM_CAP_IMMEDIATE_EXIT: |
| case KVM_CAP_IOEVENTFD: |
| case KVM_CAP_MP_STATE: |
| case KVM_CAP_SET_GUEST_DEBUG: |
| r = 1; |
| break; |
| case KVM_CAP_NR_VCPUS: |
| r = num_online_cpus(); |
| break; |
| case KVM_CAP_MAX_VCPUS: |
| r = KVM_MAX_VCPUS; |
| break; |
| case KVM_CAP_MAX_VCPU_ID: |
| r = KVM_MAX_VCPU_IDS; |
| break; |
| case KVM_CAP_NR_MEMSLOTS: |
| r = KVM_USER_MEM_SLOTS; |
| break; |
| default: |
| r = 0; |
| break; |
| } |
| |
| return r; |
| } |
| |
| int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) |
| { |
| return -ENOIOCTLCMD; |
| } |