Heiko Carstens 602490b469 s390/vx: fix save/restore of fpu kernel context ... [ Upstream commit e6b2dab418 ] The KERNEL_FPR mask only contains a flag for the first eight vector registers. However floating point registers overlay parts of the first sixteen vector registers. This could lead to vector register corruption if a kernel fpu context uses any of the vector registers 8 to 15 and is interrupted or calls a KERNEL_FPR context. If that context uses also vector registers 8 to 15, their contents will be corrupted on return. Luckily this is currently not a real bug, since the kernel has only one KERNEL_FPR user with s390_adjust_jiffies() and it is only using floating point registers 0 to 2. Fix this by using the correct bits for KERNEL_FPR. Fixes: 7f79695cc1 ("s390/fpu: improve kernel_fpu_[begin|end]") Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-01-01 12:42:26 +00:00
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asm	s390/vx: fix save/restore of fpu kernel context	2024-01-01 12:42:26 +00:00
uapi/asm	ARM:	2023-09-07 13:52:20 -07:00