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s390/uv: Retrieve UV secrets sysfs support

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Reflect the updated content in the query information UVC to the sysfs at
/sys/firmware/query

* new UV-query sysfs entry for the maximum number of retrievable
  secrets the UV can store for one secure guest.
* new UV-query sysfs entry for the maximum number of association
  secrets the UV can store for one secure guest.
* max_secrets contains the sum of max association and max retrievable
  secrets.

Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Link: https://lore.kernel.org/r/20241024062638.1465970-7-seiden@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Steffen Eiden 2024-10-24 08:26:38 +02:00 committed by Heiko Carstens
parent d356137187
commit f00469a642
3 changed files with 31 additions and 6 deletions
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3
arch/s390/boot/uv.c
View File

@ -46,7 +46,8 @@ void uv_query_info(void)
uv_info.supp_add_secret_req_ver = uvcb.supp_add_secret_req_ver;
uv_info.supp_add_secret_pcf = uvcb.supp_add_secret_pcf;
uv_info.supp_secret_types = uvcb.supp_secret_types;
uv_info.max_secrets = uvcb.max_secrets;
uv_info.max_assoc_secrets = uvcb.max_assoc_secrets;
uv_info.max_retr_secrets = uvcb.max_retr_secrets;
}
if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&

10
arch/s390/include/asm/uv.h
View File

@ -145,9 +145,10 @@ struct uv_cb_qui {
u64 reservedf0; /* 0x00f0 */
u64 supp_add_secret_req_ver; /* 0x00f8 */
u64 supp_add_secret_pcf; /* 0x0100 */
u64 supp_secret_types; /* 0x0180 */
u16 max_secrets; /* 0x0110 */
u8 reserved112[0x120 - 0x112]; /* 0x0112 */
u64 supp_secret_types; /* 0x0108 */
u16 max_assoc_secrets; /* 0x0110 */
u16 max_retr_secrets; /* 0x0112 */
u8 reserved114[0x120 - 0x114]; /* 0x0114 */
} __packed __aligned(8);
struct uv_key_hash {
@ -548,7 +549,8 @@ struct uv_info {
unsigned long supp_add_secret_req_ver;
unsigned long supp_add_secret_pcf;
unsigned long supp_secret_types;
unsigned short max_secrets;
unsigned short max_assoc_secrets;
unsigned short max_retr_secrets;
};
extern struct uv_info uv_info;

24
arch/s390/kernel/uv.c
View File

@ -696,12 +696,32 @@ static struct kobj_attribute uv_query_supp_secret_types_attr =
static ssize_t uv_query_max_secrets(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", uv_info.max_secrets);
return sysfs_emit(buf, "%d\n",
uv_info.max_assoc_secrets + uv_info.max_retr_secrets);
}
static struct kobj_attribute uv_query_max_secrets_attr =
__ATTR(max_secrets, 0444, uv_query_max_secrets, NULL);
static ssize_t uv_query_max_retr_secrets(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", uv_info.max_retr_secrets);
}
static struct kobj_attribute uv_query_max_retr_secrets_attr =
__ATTR(max_retr_secrets, 0444, uv_query_max_retr_secrets, NULL);
static ssize_t uv_query_max_assoc_secrets(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "%d\n", uv_info.max_assoc_secrets);
}
static struct kobj_attribute uv_query_max_assoc_secrets_attr =
__ATTR(max_assoc_secrets, 0444, uv_query_max_assoc_secrets, NULL);
static struct attribute *uv_query_attrs[] = {
&uv_query_facilities_attr.attr,
&uv_query_feature_indications_attr.attr,
@ -719,6 +739,8 @@ static struct attribute *uv_query_attrs[] = {
&uv_query_supp_add_secret_pcf_attr.attr,
&uv_query_supp_secret_types_attr.attr,
&uv_query_max_secrets_attr.attr,
&uv_query_max_assoc_secrets_attr.attr,
&uv_query_max_retr_secrets_attr.attr,
NULL,
};