1 files changed, 52 insertions, 0 deletions
diff --git a/OvmfPkg/Include/IndustryStandard/VirtioFs.h b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
new file mode 100644
index 0000000000..ea7d80d15d
--- /dev/null
+++ b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
@@ -0,0 +1,52 @@
+/** @file
+  Type and macro definitions specific to the Virtio Filesystem device.
+
+  At the time of this writing, the latest released Virtio specification (v1.1)
+  does not include the virtio-fs device. The development version of the
+  specification defines it however; see the latest version at
+  <https://github.com/oasis-tcs/virtio-spec/blob/87fa6b5d8155/virtio-fs.tex>.
+
+  This header file is minimal, and only defines the types and macros that are
+  necessary for the OvmfPkg implementation.
+
+  Copyright (C) 2020, Red Hat, Inc.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef VIRTIO_FS_H_
+#define VIRTIO_FS_H_
+
+#include <IndustryStandard/Virtio.h>
+
+//
+// Lowest numbered queue for sending normal priority requests.
+//
+#define VIRTIO_FS_REQUEST_QUEUE 1
+
+//
+// Number of bytes in the "VIRTIO_FS_CONFIG.Tag" field.
+//
+#define VIRTIO_FS_TAG_BYTES 36
+
+//
+// Device configuration layout.
+//
+#pragma pack (1)
+typedef struct {
+  //
+  // The Tag field can be considered the filesystem label, or a mount point
+  // hint. It is UTF-8 encoded, and padded to full size with NUL bytes. If the
+  // encoded bytes take up the entire Tag field, then there is no NUL
+  // terminator.
+  //
+  UINT8 Tag[VIRTIO_FS_TAG_BYTES];
+  //
+  // The total number of request virtqueues exposed by the device (i.e.,
+  // excluding the "hiprio" queue).
+  //
+  UINT32 NumReqQueues;
+} VIRTIO_FS_CONFIG;
+#pragma pack ()
+
+#endif // VIRTIO_FS_H_