1 files changed, 39 insertions, 0 deletions
diff --git a/pkg/sentry/platform/kvm/kvm_arm64_unsafe.go b/pkg/sentry/platform/kvm/kvm_arm64_unsafe.go
new file mode 100755
index 000000000..6531bae1d
--- /dev/null
+++ b/pkg/sentry/platform/kvm/kvm_arm64_unsafe.go
@@ -0,0 +1,39 @@
+// Copyright 2019 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build arm64
+
+package kvm
+
+import (
+	"fmt"
+	"syscall"
+)
+
+var (
+	runDataSize int
+)
+
+func updateSystemValues(fd int) error {
+	// Extract the mmap size.
+	sz, _, errno := syscall.RawSyscall(syscall.SYS_IOCTL, uintptr(fd), _KVM_GET_VCPU_MMAP_SIZE, 0)
+	if errno != 0 {
+		return fmt.Errorf("getting VCPU mmap size: %v", errno)
+	}
+	// Save the data.
+	runDataSize = int(sz)
+
+	// Success.
+	return nil
+}