diff options
| author | Harald Freudenberger <freude@linux.vnet.ibm.com> | 2016-11-08 11:54:28 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-09-06 09:24:42 +0200 |
| commit | 050349b5b71df52c24989037bd6515cb54c3ef35 (patch) | |
| tree | 2c3f60dc0709e97964bf3a466ab07895830dc040 /drivers/s390 | |
| parent | e7fc5146cfe4f1b10f2ed6c36b65248aa948abe8 (diff) | |
| download | linux-050349b5b71df52c24989037bd6515cb54c3ef35.tar.gz linux-050349b5b71df52c24989037bd6515cb54c3ef35.tar.bz2 linux-050349b5b71df52c24989037bd6515cb54c3ef35.zip | |
s390/zcrypt: externalize AP config info query
KVM has a need to fetch the crypto configuration information
as it is returned by the PQAP(QCI) instruction. This patch
introduces a new API ap_query_configuration() which provides
this info in a handy way for the caller.
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 21 | ||||
| -rw-r--r-- | drivers/s390/crypto/ap_bus.h | 11 |
2 files changed, 16 insertions, 16 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 4fcfa8d4e0b5..5f0be2040272 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -194,12 +194,23 @@ struct ap_queue_status ap_test_queue(ap_qid_t qid, } EXPORT_SYMBOL(ap_test_queue); -static inline int ap_query_configuration(void) +/* + * ap_query_configuration(): Fetch cryptographic config info + * + * Returns the ap configuration info fetched via PQAP(QCI). + * On success 0 is returned, on failure a negative errno + * is returned, e.g. if the PQAP(QCI) instruction is not + * available, the return value will be -EOPNOTSUPP. + */ +int ap_query_configuration(struct ap_config_info *info) { - if (!ap_configuration) + if (!ap_configuration_available()) return -EOPNOTSUPP; - return ap_qci(ap_configuration); + if (!info) + return -EINVAL; + return ap_qci(info); } +EXPORT_SYMBOL(ap_query_configuration); /** * ap_init_configuration(): Allocate and query configuration array. @@ -212,7 +223,7 @@ static void ap_init_configuration(void) ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL); if (!ap_configuration) return; - if (ap_query_configuration() != 0) { + if (ap_query_configuration(ap_configuration) != 0) { kfree(ap_configuration); ap_configuration = NULL; return; @@ -1009,7 +1020,7 @@ static void ap_scan_bus(struct work_struct *unused) AP_DBF(DBF_DEBUG, "ap_scan_bus running\n"); - ap_query_configuration(); + ap_query_configuration(ap_configuration); if (ap_select_domain() != 0) goto out; diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h index f07698d41f77..754cf2223cfb 100644 --- a/drivers/s390/crypto/ap_bus.h +++ b/drivers/s390/crypto/ap_bus.h @@ -204,17 +204,6 @@ struct ap_message { struct ap_message *); }; -struct ap_config_info { - unsigned int special_command:1; - unsigned int ap_extended:1; - unsigned char reserved1:6; - unsigned char reserved2[15]; - unsigned int apm[8]; /* AP ID mask */ - unsigned int aqm[8]; /* AP queue mask */ - unsigned int adm[8]; /* AP domain mask */ - unsigned char reserved4[16]; -} __packed; - /** * ap_init_message() - Initialize ap_message. * Initialize a message before using. Otherwise this might result in |