Commit fcc6dd4b authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/chsc: query utility strings via fmt3 channel path descriptor 



Add support for format 3 channel path descriptors and use them to
gather utility strings.

Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: default avatarPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent ded27d8d

arch/s390/include/asm/css_chars.h

+4 −2
Original line number Diff line number Diff line
@@ -34,6 +34,8 @@ struct css_general_char { 
	u32 alt_ssi : 1; /* bit 108 */

	u32 : 1;

	u32 narf : 1;	 /* bit 110 */

	u32 : 12;

	u32 util_str : 1;/* bit 123 */

} __packed;



extern struct css_general_char css_general_characteristics;

drivers/s390/cio/chp.c

+1 −0
Original line number Diff line number Diff line
@@ -431,6 +431,7 @@ int chp_update_desc(struct channel_path *chp) 
	 * hypervisors implement the required chsc commands.

	 */

	chsc_determine_fmt1_channel_path_desc(chp->chpid, &chp->desc_fmt1);

	chsc_determine_fmt3_channel_path_desc(chp->chpid, &chp->desc_fmt3);

	chsc_get_channel_measurement_chars(chp);



	return 0;

drivers/s390/cio/chp.h

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ struct channel_path { 
	int state;

	struct channel_path_desc_fmt0 desc;

	struct channel_path_desc_fmt1 desc_fmt1;

	struct channel_path_desc_fmt3 desc_fmt3;

	/* Channel-measurement related stuff: */

	int cmg;

	int shared;

drivers/s390/cio/chsc.c

+3 −0
Original line number Diff line number Diff line
@@ -915,6 +915,8 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, 
		return -EINVAL;

	if ((rfmt == 2) && !css_general_characteristics.cib)

		return -EINVAL;

	if ((rfmt == 3) && !css_general_characteristics.util_str)

		return -EINVAL;



	memset(page, 0, PAGE_SIZE);

	scpd_area = page;
@@ -963,6 +965,7 @@ out: \ 


chsc_det_chp_desc(0, 0)

chsc_det_chp_desc(1, 1)

chsc_det_chp_desc(3, 0)



static void

chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,

drivers/s390/cio/chsc.h

+7 −0
Original line number Diff line number Diff line
@@ -40,6 +40,11 @@ struct channel_path_desc_fmt1 { 
	u32 zeros[2];

} __attribute__ ((packed));



struct channel_path_desc_fmt3 {

	struct channel_path_desc_fmt1 fmt1_desc;

	u8 util_str[64];

};



struct channel_path;



struct css_chsc_char {
@@ -151,6 +156,8 @@ int chsc_determine_fmt0_channel_path_desc(struct chp_id chpid, 
					  struct channel_path_desc_fmt0 *desc);

int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,

					  struct channel_path_desc_fmt1 *desc);

int chsc_determine_fmt3_channel_path_desc(struct chp_id chpid,

					  struct channel_path_desc_fmt3 *desc);

void chsc_chp_online(struct chp_id chpid);

void chsc_chp_offline(struct chp_id chpid);

int chsc_get_channel_measurement_chars(struct channel_path *chp);