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