1 files changed, 42 insertions, 0 deletions
diff --git a/include/uapi/linux/tdx-guest.h b/include/uapi/linux/tdx-guest.h
new file mode 100644
index 000000000000..a6a2098c08ff
--- /dev/null
+++ b/include/uapi/linux/tdx-guest.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Userspace interface for TDX guest driver
+ *
+ * Copyright (C) 2022 Intel Corporation
+ */
+
+#ifndef _UAPI_LINUX_TDX_GUEST_H_
+#define _UAPI_LINUX_TDX_GUEST_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/* Length of the REPORTDATA used in TDG.MR.REPORT TDCALL */
+#define TDX_REPORTDATA_LEN              64
+
+/* Length of TDREPORT used in TDG.MR.REPORT TDCALL */
+#define TDX_REPORT_LEN                  1024
+
+/**
+ * struct tdx_report_req - Request struct for TDX_CMD_GET_REPORT0 IOCTL.
+ *
+ * @reportdata: User buffer with REPORTDATA to be included into TDREPORT.
+ *              Typically it can be some nonce provided by attestation
+ *              service, so the generated TDREPORT can be uniquely verified.
+ * @tdreport: User buffer to store TDREPORT output from TDCALL[TDG.MR.REPORT].
+ */
+struct tdx_report_req {
+	__u8 reportdata[TDX_REPORTDATA_LEN];
+	__u8 tdreport[TDX_REPORT_LEN];
+};
+
+/*
+ * TDX_CMD_GET_REPORT0 - Get TDREPORT0 (a.k.a. TDREPORT subtype 0) using
+ *                       TDCALL[TDG.MR.REPORT]
+ *
+ * Return 0 on success, -EIO on TDCALL execution failure, and
+ * standard errno on other general error cases.
+ */
+#define TDX_CMD_GET_REPORT0              _IOWR('T', 1, struct tdx_report_req)
+
+#endif /* _UAPI_LINUX_TDX_GUEST_H_ */