bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

s390/zcrypt: introduce new internal AP queue se_bound attribute

Browse Source 
This patch introduces a new AP queue internal attribute
se_bound which reflects the bound state of an APQN within
a Secure Execution environment.

With introduction of Secure Execution guests now an
AP firmware queue needs to be bound to the guest before
usage. This patch introduces a new internal attribute
reflecting this bound state and some glue code to handle
this new field during lifetime of an AP queue device.

Together with that now the zcrypt scheduler considers
the state of the AP queues when a message is about to be
distributed among the existing queues. There is a new
function ap_queue_usable() which returns true only when
all conditions for using this AP queue device are fulfilled.
In details this means: the AP queue needs to be configured,
not checkstopped and within an SE environment it needs
to be bound. So the new function gives and indication
if the AP queue device is ready to serve requests or not.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Harald Freudenberger
2023-09-12 10:08:51 +02:00
committed by Vasily Gorbik
parent 32d1d9204f
commit a19a161482
3 changed files with 55 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/s390/crypto/zcrypt_api.c
View File

@@ -693,7 +693,7 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->rsa_modexpo ||
!zq->queue->config || zq->queue->chkstop)
!ap_queue_usable(zq->queue))
continue;
/* check if device node has admission for this queue */
if (!zcrypt_check_queue(perms,
@@ -798,7 +798,7 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->rsa_modexpo_crt ||
!zq->queue->config || zq->queue->chkstop)
!ap_queue_usable(zq->queue))
continue;
/* check if device node has admission for this queue */
if (!zcrypt_check_queue(perms,
@@ -916,7 +916,7 @@ static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
for_each_zcrypt_queue(zq, zc) {
/* check for device usable and eligible */
if (!zq->online || !zq->ops->send_cprb ||
!zq->queue->config || zq->queue->chkstop ||
!ap_queue_usable(zq->queue) ||
(tdom != AUTOSEL_DOM &&
tdom != AP_QID_QUEUE(zq->queue->qid)))
continue;
@@ -1087,7 +1087,7 @@ static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->send_ep11_cprb ||
!zq->queue->config || zq->queue->chkstop ||
!ap_queue_usable(zq->queue) ||
(targets &&
!is_desired_ep11_queue(zq->queue->qid,
target_num, targets)))
@@ -1186,7 +1186,7 @@ static long zcrypt_rng(char *buffer)
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->rng ||
!zq->queue->config || zq->queue->chkstop)
!ap_queue_usable(zq->queue))
continue;
if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
continue;