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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:35:05 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:31 +0000
commit85c675d0d09a45a135bddd15d7b385f8758c32fb (patch)
tree76267dbc9b9a130337be3640948fe397b04ac629 /arch/loongarch/kvm/vm.c
parentAdding upstream version 6.6.15. (diff)
downloadlinux-85c675d0d09a45a135bddd15d7b385f8758c32fb.tar.xz
linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.zip
Adding upstream version 6.7.7.upstream/6.7.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/loongarch/kvm/vm.c')
-rw-r--r--arch/loongarch/kvm/vm.c94
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 0000000000..0a37f6fa8f
--- /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;
+}