Commit c73088c4 authored by hanliyang's avatar hanliyang
Browse files

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

hygon inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I98NP1


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: default avatarhanliyang <hanliyang@hygon.cn>
parent 12643565

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

+20 −0
Original line number Diff line number Diff line
@@ -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

+2 −0
Original line number Diff line number Diff line
@@ -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

+13 −2
Original line number Diff line number Diff line
@@ -515,6 +515,10 @@ static int __sev_platform_init_locked(int *error) 


	dev_dbg(sev->dev, "SEV firmware initialized\n");



	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);
@@ -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;

}