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authorGrzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>2017-01-20 16:22:36 +0300
committerThomas Gleixner <tglx@linutronix.de>2017-02-04 10:51:09 +0300
commite16fd002afe2b16d828bbf738b8a81a185fe9272 (patch)
tree000147567ec578f62192d7f9d4d435a69fc13ffb /Documentation/admin-guide
parent1d12d0ef0194ccc4dcebed3d96bb2301b26fc3ee (diff)
downloadlinux-e16fd002afe2b16d828bbf738b8a81a185fe9272.tar.xz
x86/cpufeature: Enable RING3MWAIT for Knights Landing
Enable ring 3 MONITOR/MWAIT for Intel Xeon Phi x200 codenamed Knights Landing. Presence of this feature cannot be detected automatically (by reading any other MSR) therefore it is required to explicitly check for the family and model of the CPU before attempting to enable it. Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com> Cc: Piotr.Luc@intel.com Cc: dave.hansen@linux.intel.com Link: http://lkml.kernel.org/r/1484918557-15481-5-git-send-email-grzegorz.andrejczuk@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index be7c0d9506b1..cfbb3fc938f7 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3563,6 +3563,10 @@
rhash_entries= [KNL,NET]
Set number of hash buckets for route cache
+ ring3mwait=disable
+ [KNL] Disable ring 3 MONITOR/MWAIT feature on supported
+ CPUs.
+
ro [KNL] Mount root device read-only on boot
rodata= [KNL]