x86/intel_rdt: Introduce resource group's mode resctrl file
A new resctrl file "mode" associated with each resource group is introduced. This file will display the resource group's current mode and an administrator can also use it to modify the resource group's mode. Only shareable mode is currently supported. Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: fenghua.yu@intel.com Cc: tony.luck@intel.com Cc: vikas.shivappa@linux.intel.com Cc: gavin.hindman@intel.com Cc: jithu.joseph@intel.com Cc: dave.hansen@intel.com Cc: hpa@zytor.com Link: https://lkml.kernel.org/r/20ab78fda26a8c8d98e18ec555f6a1f728948972.1529706536.git.reinette.chatre@intel.com
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