From e16fd002afe2b16d828bbf738b8a81a185fe9272 Mon Sep 17 00:00:00 2001 From: Grzegorz Andrejczuk Date: Fri, 20 Jan 2017 14:22:36 +0100 Subject: 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 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 --- Documentation/admin-guide/kernel-parameters.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/admin-guide') 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] -- cgit v1.2.3