xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

zcrypt: handle AP Info notification from CHSC SEI command

Browse Source 
The current AP bus implementation periodically polls the AP configuration
to detect changes. When the AP configuration is dynamically changed via the
SE or an SCLP instruction, the changes will not be reflected to sysfs until
the next time the AP configuration is polled. The CHSC architecture
provides a Store Event Information (SEI) command to make notification of an
AP configuration change. This patch introduces a handler to process
notification from the CHSC SEI command by immediately kicking off an AP bus
scan-after-event.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Harald Freudenberger <FREUDE@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Tony Krowiak
2019-02-18 12:01:35 -05:00
committed by Martin Schwidefsky
parent 0ba8141fa0
commit 0d9c038fef
3 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/s390/cio/chsc.c
View File

@@ -24,6 +24,7 @@
#include <asm/crw.h>
#include <asm/isc.h>
#include <asm/ebcdic.h>
#include <asm/ap.h>
#include "css.h"
#include "cio.h"
@@ -586,6 +587,15 @@ static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
" failed (rc=%d).\n", ret);
}
static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area)
{
CIO_CRW_EVENT(3, "chsc: ap config changed\n");
if (sei_area->rs != 5)
return;
ap_bus_cfg_chg();
}
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
{
switch (sei_area->cc) {
@@ -612,6 +622,9 @@ static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
case 2: /* i/o resource accessibility */
chsc_process_sei_res_acc(sei_area);
break;
case 3: /* ap config changed */
chsc_process_sei_ap_cfg_chg(sei_area);
break;
case 7: /* channel-path-availability information */
chsc_process_sei_chp_avail(sei_area);
break;