crypto: ccp: Print Hygon CSV API version when CSV support is detected

hygon inclusion
category: feature
CVE: NA

---------------------------

The Cryptographic Co-Processor module will print 'SEV API' instead of
'CSV API' on Hygon CPU if CSV is supported. Fix this confused message
here.

Signed-off-by: hanliyang <hanliyang@hygon.cn>

Author: hanliyang

drivers/crypto/ccp/hygon/csv-dev.c

@@ -17,6 +17,26 @@
 
 #include "psp-dev.h"
 
+/*
+ * Hygon CSV build info:
+ *    Hygon CSV build info is 32-bit in length other than 8-bit as that
+ *    in AMD SEV.
+ */
+u32 hygon_csv_build;
+
+/*
+ * csv_update_api_version used to update the api version of HYGON CSV
+ * firmwareat driver side.
+ * Currently, we only need to update @hygon_csv_build.
+ */
+void csv_update_api_version(struct sev_user_data_status *status)
+{
+	if (status) {
+		hygon_csv_build = (status->flags >> 9) |
+				   ((u32)status->build << 23);
+	}
+}
+
 int csv_cmd_buffer_len(int cmd)
 {
 	switch (cmd) {

drivers/crypto/ccp/hygon/csv-dev.h

@@ -12,8 +12,10 @@
 
 #include <linux/fs.h>
 
+extern u32 hygon_csv_build;
 extern const struct file_operations csv_fops;
 
+void csv_update_api_version(struct sev_user_data_status *status);
 int csv_cmd_buffer_len(int cmd);
 
 #endif	/* __CCP_HYGON_CSV_DEV_H__ */

drivers/crypto/ccp/sev-dev.c

@@ -515,8 +515,12 @@ static int __sev_platform_init_locked(int *error)
 
 	dev_dbg(sev->dev, "SEV firmware initialized\n");
 
-	dev_info(sev->dev, "SEV API:%d.%d build:%d\n", sev->api_major,
-		 sev->api_minor, sev->build);
+	if (is_vendor_hygon())
+		dev_info(sev->dev, "CSV API:%d.%d build:%d\n", sev->api_major,
+			 sev->api_minor, hygon_csv_build);
+	else
+		dev_info(sev->dev, "SEV API:%d.%d build:%d\n", sev->api_major,
+			 sev->api_minor, sev->build);
 
 	return 0;
 }
@@ -738,6 +742,13 @@ static int sev_get_api_version(void)
 	sev->build = status.build;
 	sev->state = status.state;
 
+	/*
+	 * The api version fields of HYGON CSV firmware are not consistent
+	 * with AMD SEV firmware.
+	 */
+	if (is_vendor_hygon())
+		csv_update_api_version(&status);
+
 	return 0;
 }