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| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2022-03-11 01:00:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 10:34:20 +0300 |
| commit | aaf27fcaefc15ea51bb2fef550f17c5b71032041 (patch) | |
| tree | 1041dad2d0159800332af248c7ce78c6e9e406e9 /lib/cpu_rmap.c | |
| parent | 2dd7d2eddf8e1ff3556e333979af99e4c167a7b5 (diff) | |
| download | linux-aaf27fcaefc15ea51bb2fef550f17c5b71032041.tar.xz | |
x86/tsx: Use MSR_TSX_CTRL to clear CPUID bits
commit 258f3b8c3210b03386e4ad92b4bd8652b5c1beb3 upstream.
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 <lkp@intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Neelima Krishnan <neelima.krishnan@intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/5b323e77e251a9c8bcdda498c5cc0095be1e1d3c.1646943780.git.pawan.kumar.gupta@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/cpu_rmap.c')
0 files changed, 0 insertions, 0 deletions