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| author | Pawan Gupta <[email protected]> | 2022-03-10 22:00:59 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2022-04-11 07:54:34 +0000 |
| commit | 258f3b8c3210b03386e4ad92b4bd8652b5c1beb3 (patch) | |
| tree | 0d8a799381fb64fded33a524d4fa7cc077f57990 /tools/perf/util/c++/clang.cpp | |
| parent | Linux 5.18-rc2 (diff) | |
| download | kernel-258f3b8c3210b03386e4ad92b4bd8652b5c1beb3.tar.gz kernel-258f3b8c3210b03386e4ad92b4bd8652b5c1beb3.zip | |
x86/tsx: Use MSR_TSX_CTRL to clear CPUID bits
tsx_clear_cpuid() uses MSR_TSX_FORCE_ABORT to clear CPUID.RTM and
CPUID.HLE. Not all CPUs support MSR_TSX_FORCE_ABORT, alternatively use
MSR_IA32_TSX_CTRL when supported.
[ bp: Document how and why TSX gets disabled. ]
Fixes: 293649307ef9 ("x86/tsx: Clear CPUID bits when TSX always force aborts")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Pawan Gupta <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Tested-by: Neelima Krishnan <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/5b323e77e251a9c8bcdda498c5cc0095be1e1d3c.1646943780.git.pawan.kumar.gupta@linux.intel.com
Diffstat (limited to 'tools/perf/util/c++/clang.cpp')
0 files changed, 0 insertions, 0 deletions