diff options
| author |  Harald Freudenberger <freude@linux.ibm.com>
| 2022-09-20 15:12:01 +0200 |
|---|---|---|
| committer |  Heiko Carstens <hca@linux.ibm.com>
| 2023-03-20 11:12:48 +0100 |
| commit | f6047040217babeb9655b855c83d61cb1c375ac9 (patch) | |
| tree | 1d324433a041d9d5a10fed6c09d0b797ae126b6f /drivers/s390/crypto/ap_bus.c | |
| parent | s390/zcrypt: replace scnprintf with sysfs_emit (diff) | |
| download | linux-f6047040217babeb9655b855c83d61cb1c375ac9.tar.gz linux-f6047040217babeb9655b855c83d61cb1c375ac9.tar.bz2 linux-f6047040217babeb9655b855c83d61cb1c375ac9.zip | |
s390/ap: exploit new B bit from QCI config info
This patch introduces an update to the ap_config_info
struct which is filled with the QCI subfunction. There
is a new bit apsb (short 'B') showing if the AP secure
bind facility is available. The patch also includes a
simple function ap_sb_available() wrapping this bit test.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390/crypto/ap_bus.c')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 2bc184ee8952..b3c350e9fc1d 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -201,6 +201,18 @@ static inline int ap_qact_available(void) } /* + * ap_sb_available(): Test if the AP secure binding facility is available. + * + * Returns 1 if secure binding facility is available. + */ +int ap_sb_available(void) +{ + if (ap_qci_info) + return ap_qci_info->apsb; + return 0; +} + +/* * ap_fetch_qci_info(): Fetch cryptographic config info * * Returns the ap configuration info fetched via PQAP(QCI). @@ -248,13 +260,13 @@ static void __init ap_init_qci_info(void) AP_DBF_INFO("%s successful fetched initial qci info\n", __func__); if (ap_qci_info->apxa) { - if (ap_qci_info->Na) { - ap_max_adapter_id = ap_qci_info->Na; + if (ap_qci_info->na) { + ap_max_adapter_id = ap_qci_info->na; AP_DBF_INFO("%s new ap_max_adapter_id is %d\n", __func__, ap_max_adapter_id); } - if (ap_qci_info->Nd) { - ap_max_domain_id = ap_qci_info->Nd; + if (ap_qci_info->nd) { + ap_max_domain_id = ap_qci_info->nd; AP_DBF_INFO("%s new ap_max_domain_id is %d\n", __func__, ap_max_domain_id); } |