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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-07-20 08:24:03 +0300 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-07-28 19:05:23 +0300 |
| commit | 6f5c672d17f583b081e283927f5040f726c54598 (patch) | |
| tree | e2d8a6ff6d31cffecf5866496897ccf6156ee78f /arch/s390/boot/uv.h | |
| parent | fc7fab3f9156df73cd5f2705f001451265453d34 (diff) | |
| download | linux-6f5c672d17f583b081e283927f5040f726c54598.tar.xz | |
s390/smp: enforce lowcore protection on CPU restart
As result of commit 915fea04f932 ("s390/smp: enable DAT before
CPU restart callback is called") the low-address protection bit
gets mistakenly unset in control register 0 save area of the
absolute zero memory. That area is used when manual PSW restart
happened to hit an offline CPU. In this case the low-address
protection for that CPU will be dropped.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Fixes: 915fea04f932 ("s390/smp: enable DAT before CPU restart callback is called")
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot/uv.h')
0 files changed, 0 insertions, 0 deletions