1 files changed, 94 insertions, 0 deletions
diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c
new file mode 100644
index 000000000000..0a37f6fa8f2d
--- /dev/null
+++ b/arch/loongarch/kvm/vm.c
@@ -0,0 +1,94 @@
+// 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_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;
+}
+
+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:
+		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;
+}