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| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2020-01-10 14:50:54 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-01-17 19:13:46 +0100 |
| commit | 5efc6fa9044c3356d6046c6e1da6d02572dbed6b (patch) | |
| tree | 7800286c54cdec52b2c62bc2d76c1f9ab1d98b36 /kernel/smp.c | |
| parent | b3a987b0264d3ddbb24293ebff10eddfc472f653 (diff) | |
| download | linux-5efc6fa9044c3356d6046c6e1da6d02572dbed6b.tar.gz linux-5efc6fa9044c3356d6046c6e1da6d02572dbed6b.tar.bz2 linux-5efc6fa9044c3356d6046c6e1da6d02572dbed6b.zip | |
x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR
/proc/cpuinfo currently reports Hardware Lock Elision (HLE) feature to
be present on boot cpu even if it was disabled during the bootup. This
is because cpuinfo_x86->x86_capability HLE bit is not updated after TSX
state is changed via the new MSR IA32_TSX_CTRL.
Update the cached HLE bit also since it is expected to change after an
update to CPUID_CLEAR bit in MSR IA32_TSX_CTRL.
Fixes: 95c5824f75f3 ("x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default")
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Neelima Krishnan <neelima.krishnan@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/2529b99546294c893dfa1c89e2b3e46da3369a59.1578685425.git.pawan.kumar.gupta@linux.intel.com
Diffstat (limited to 'kernel/smp.c')
0 files changed, 0 insertions, 0 deletions