Searched hist:"2268169 c14e5f00377512932cf2b7bc78e4577ad" (Results 1 – 2 of 2) sorted by relevance
| /linux/arch/s390/include/asm/ |
| H A D | nospec-insn.h | diff 2268169c14e5f00377512932cf2b7bc78e4577ad Thu Feb 24 16:43:23 CET 2022 Vasily Gorbik <gor@linux.ibm.com> s390: remove unused expoline to BC instructions
This reverts commit 6deaa3bbca80 ("s390: extend expoline to BC
instructions"). Expolines to BC instructions were added to be utilized
by commit de5cb6eb514e ("s390: use expoline thunks in the BPF JIT"). But
corresponding code has been removed by commit e1cf4befa297 ("bpf, s390x:
remove ld_abs/ld_ind"). And compiler does not generate such expolines as
well.
Compared to regular expolines, expolines to BC instructions contain
displacement and all possible variations cannot be generated in advance,
making kpatch support more complicated. So, remove those to avoid
future usages.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
|
| /linux/arch/s390/kernel/ |
| H A D | nospec-branch.c | diff 2268169c14e5f00377512932cf2b7bc78e4577ad Thu Feb 24 16:43:23 CET 2022 Vasily Gorbik <gor@linux.ibm.com> s390: remove unused expoline to BC instructions
This reverts commit 6deaa3bbca80 ("s390: extend expoline to BC
instructions"). Expolines to BC instructions were added to be utilized
by commit de5cb6eb514e ("s390: use expoline thunks in the BPF JIT"). But
corresponding code has been removed by commit e1cf4befa297 ("bpf, s390x:
remove ld_abs/ld_ind"). And compiler does not generate such expolines as
well.
Compared to regular expolines, expolines to BC instructions contain
displacement and all possible variations cannot be generated in advance,
making kpatch support more complicated. So, remove those to avoid
future usages.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
|