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| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2025-04-09 00:47:31 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-04-09 13:41:30 +0300 |
| commit | fc9fd3f98423367c79e0bd85a9515df26dc1b3cc (patch) | |
| tree | 86cbab691334e23f96e98bd6999a76bfd61aba76 /lib/test_fortify/write_overflow-strncpy-src.c | |
| parent | 13235d6d50bba99931c4392c0f813cfae0de3eac (diff) | |
| download | linux-fc9fd3f98423367c79e0bd85a9515df26dc1b3cc.tar.xz | |
x86/bugs: Use SBPB in write_ibpb() if applicable
write_ibpb() does IBPB, which (among other things) flushes branch type
predictions on AMD. If the CPU has SRSO_NO, or if the SRSO mitigation
has been disabled, branch type flushing isn't needed, in which case the
lighter-weight SBPB can be used.
The 'x86_pred_cmd' variable already keeps track of whether IBPB or SBPB
should be used. Use that instead of hardcoding IBPB.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/17c5dcd14b29199b75199d67ff7758de9d9a4928.1744148254.git.jpoimboe@kernel.org
Diffstat (limited to 'lib/test_fortify/write_overflow-strncpy-src.c')
0 files changed, 0 insertions, 0 deletions