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Commit aaf27fca authored by Pawan Gupta's avatar Pawan Gupta Committed by Greg Kroah-Hartman
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x86/tsx: Use MSR_TSX_CTRL to clear CPUID bits

commit 258f3b8c 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: 29364930

 ("x86/tsx: Clear CPUID bits when TSX always force aborts")
Reported-by: default avatarkernel test robot <lkp@intel.com>
Signed-off-by: default avatarPawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Tested-by: default avatarNeelima 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: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2dd7d2ed
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