psp-sev: Assign numbers to all status codes and add new

Make the definitions explicit. Add some more new codes.

The following patches will be using SPDM_REQUEST and
EXPAND_BUFFER_LENGTH_REQUEST, others are useful for the PSP FW
diagnostics.

Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
Link: https://patch.msgid.link/20251202024449.542361-3-aik@amd.com
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Author: aik

include/uapi/linux/psp-sev.h

@@ -47,32 +47,32 @@ typedef enum {
 	 * with possible values from the specification.
 	 */
 	SEV_RET_NO_FW_CALL = -1,
-	SEV_RET_SUCCESS = 0,
-	SEV_RET_INVALID_PLATFORM_STATE,
-	SEV_RET_INVALID_GUEST_STATE,
-	SEV_RET_INAVLID_CONFIG,
+	SEV_RET_SUCCESS                    = 0,
+	SEV_RET_INVALID_PLATFORM_STATE     = 0x0001,
+	SEV_RET_INVALID_GUEST_STATE        = 0x0002,
+	SEV_RET_INAVLID_CONFIG             = 0x0003,
 	SEV_RET_INVALID_CONFIG = SEV_RET_INAVLID_CONFIG,
-	SEV_RET_INVALID_LEN,
-	SEV_RET_ALREADY_OWNED,
-	SEV_RET_INVALID_CERTIFICATE,
-	SEV_RET_POLICY_FAILURE,
-	SEV_RET_INACTIVE,
-	SEV_RET_INVALID_ADDRESS,
-	SEV_RET_BAD_SIGNATURE,
-	SEV_RET_BAD_MEASUREMENT,
-	SEV_RET_ASID_OWNED,
-	SEV_RET_INVALID_ASID,
-	SEV_RET_WBINVD_REQUIRED,
-	SEV_RET_DFFLUSH_REQUIRED,
-	SEV_RET_INVALID_GUEST,
-	SEV_RET_INVALID_COMMAND,
-	SEV_RET_ACTIVE,
-	SEV_RET_HWSEV_RET_PLATFORM,
-	SEV_RET_HWSEV_RET_UNSAFE,
-	SEV_RET_UNSUPPORTED,
-	SEV_RET_INVALID_PARAM,
-	SEV_RET_RESOURCE_LIMIT,
-	SEV_RET_SECURE_DATA_INVALID,
+	SEV_RET_INVALID_LEN                = 0x0004,
+	SEV_RET_ALREADY_OWNED              = 0x0005,
+	SEV_RET_INVALID_CERTIFICATE        = 0x0006,
+	SEV_RET_POLICY_FAILURE             = 0x0007,
+	SEV_RET_INACTIVE                   = 0x0008,
+	SEV_RET_INVALID_ADDRESS            = 0x0009,
+	SEV_RET_BAD_SIGNATURE              = 0x000A,
+	SEV_RET_BAD_MEASUREMENT            = 0x000B,
+	SEV_RET_ASID_OWNED                 = 0x000C,
+	SEV_RET_INVALID_ASID               = 0x000D,
+	SEV_RET_WBINVD_REQUIRED            = 0x000E,
+	SEV_RET_DFFLUSH_REQUIRED           = 0x000F,
+	SEV_RET_INVALID_GUEST              = 0x0010,
+	SEV_RET_INVALID_COMMAND            = 0x0011,
+	SEV_RET_ACTIVE                     = 0x0012,
+	SEV_RET_HWSEV_RET_PLATFORM         = 0x0013,
+	SEV_RET_HWSEV_RET_UNSAFE           = 0x0014,
+	SEV_RET_UNSUPPORTED                = 0x0015,
+	SEV_RET_INVALID_PARAM              = 0x0016,
+	SEV_RET_RESOURCE_LIMIT             = 0x0017,
+	SEV_RET_SECURE_DATA_INVALID        = 0x0018,
 	SEV_RET_INVALID_PAGE_SIZE          = 0x0019,
 	SEV_RET_INVALID_PAGE_STATE         = 0x001A,
 	SEV_RET_INVALID_MDATA_ENTRY        = 0x001B,
@@ -87,6 +87,22 @@ typedef enum {
 	SEV_RET_RESTORE_REQUIRED           = 0x0025,
 	SEV_RET_RMP_INITIALIZATION_FAILED  = 0x0026,
 	SEV_RET_INVALID_KEY                = 0x0027,
+	SEV_RET_SHUTDOWN_INCOMPLETE        = 0x0028,
+	SEV_RET_INCORRECT_BUFFER_LENGTH	   = 0x0030,
+	SEV_RET_EXPAND_BUFFER_LENGTH_REQUEST = 0x0031,
+	SEV_RET_SPDM_REQUEST               = 0x0032,
+	SEV_RET_SPDM_ERROR                 = 0x0033,
+	SEV_RET_SEV_STATUS_ERR_IN_DEV_CONN = 0x0035,
+	SEV_RET_SEV_STATUS_INVALID_DEV_CTX = 0x0036,
+	SEV_RET_SEV_STATUS_INVALID_TDI_CTX = 0x0037,
+	SEV_RET_SEV_STATUS_INVALID_TDI     = 0x0038,
+	SEV_RET_SEV_STATUS_RECLAIM_REQUIRED = 0x0039,
+	SEV_RET_IN_USE                     = 0x003A,
+	SEV_RET_SEV_STATUS_INVALID_DEV_STATE = 0x003B,
+	SEV_RET_SEV_STATUS_INVALID_TDI_STATE = 0x003C,
+	SEV_RET_SEV_STATUS_DEV_CERT_CHANGED = 0x003D,
+	SEV_RET_SEV_STATUS_RESYNC_REQ      = 0x003E,
+	SEV_RET_SEV_STATUS_RESPONSE_TOO_LARGE = 0x003F,
 	SEV_RET_MAX,
 } sev_ret_code;