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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-05-23 12:38:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-14 18:36:13 +0200 |
| commit | 66e2bf4b2cefd0758bdcf47734e3471430c121db (patch) | |
| tree | cb72e7f48f4713ccb77ecb655c715596030d7f10 /Documentation/devicetree/bindings/regulator | |
| parent | a96cae49dcbb6fec141580f8ab8407918bce6c83 (diff) | |
s390/mcck: isolate SIE instruction when setting CIF_MCCK_GUEST flag
[ Upstream commit 29ccaa4b35ea874ddd50518e5c2c746b9238a792 ]
Commit d768bd892fc8 ("s390: add options to change branch prediction
behaviour for the kernel") introduced .Lsie_exit label - supposedly
to fence off SIE instruction. However, the corresponding address
range length .Lsie_crit_mcck_length was not updated, which led to
BPON code potentionally marked with CIF_MCCK_GUEST flag.
Both .Lsie_exit and .Lsie_crit_mcck_length were removed with commit
0b0ed657fe00 ("s390: remove critical section cleanup from entry.S"),
but the issue persisted - currently BPOFF and BPENTER macros might
get wrongly considered by the machine check handler as a guest.
Fixes: d768bd892fc8 ("s390: add options to change branch prediction behaviour for the kernel")
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/regulator')
0 files changed, 0 insertions, 0 deletions