]> git.baikalelectronics.ru Git - kernel.git/commit
x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR
authorPawan Gupta <pawan.kumar.gupta@linux.intel.com>
Fri, 10 Jan 2020 22:50:54 +0000 (14:50 -0800)
committerThomas Gleixner <tglx@linutronix.de>
Fri, 17 Jan 2020 18:13:46 +0000 (19:13 +0100)
commitb68bc76268a7b892e500c8a6f97c820818f63df0
tree7800286c54cdec52b2c62bc2d76c1f9ab1d98b36
parent51213984a5013717c93ba5110d1a3b2b2072ddc1
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: 968b45772f08 ("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
arch/x86/kernel/cpu/tsx.c