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| author | Daniel Sneddon <[email protected]> | 2024-03-13 16:47:57 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2024-04-08 17:27:05 +0000 |
| commit | 0f4a837615ff925ba62648d280a861adf1582df7 (patch) | |
| tree | 0dfeef27c4dbffd6e2b9afa52a5809cd92a244ae /tools/perf/scripts/python/arm-cs-trace-disasm.py | |
| parent | x86/bhi: Add support for clearing branch history at syscall entry (diff) | |
| download | kernel-0f4a837615ff925ba62648d280a861adf1582df7.tar.gz kernel-0f4a837615ff925ba62648d280a861adf1582df7.zip | |
x86/bhi: Define SPEC_CTRL_BHI_DIS_S
Newer processors supports a hardware control BHI_DIS_S to mitigate
Branch History Injection (BHI). Setting BHI_DIS_S protects the kernel
from userspace BHI attacks without having to manually overwrite the
branch history.
Define MSR_SPEC_CTRL bit BHI_DIS_S and its enumeration CPUID.BHI_CTRL.
Mitigation is enabled later.
Signed-off-by: Daniel Sneddon <[email protected]>
Signed-off-by: Pawan Gupta <[email protected]>
Signed-off-by: Daniel Sneddon <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Alexandre Chartre <[email protected]>
Reviewed-by: Josh Poimboeuf <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/arm-cs-trace-disasm.py')
0 files changed, 0 insertions, 0 deletions