Commit 414dd2b4 authored Jun 22, 2018 by Reinette Chatre Committed by Thomas Gleixner Jun 23, 2018

x86/intel_rdt: Introduce new "exclusive" mode



At the moment all allocations are shareable. There is no way for a user to
designate that an allocation associated with a resource group cannot be
shared by another.

Introduce the new mode "exclusive". When a resource group is marked as such
it implies that no overlap is allowed between its allocation and that of
another resource group.

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/f6d24672a4280fe3b24cd2da9b5f50214439c1af.1529706536.git.reinette.chatre@intel.com

parent 95f0b77e

arch/x86/kernel/cpu/intel_rdt.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -83,6 +83,7 @@ enum rdt_group_type {
		/**
		* enum rdtgrp_mode - Mode of a RDT resource group
		* @RDT_MODE_SHAREABLE: This resource group allows sharing of its allocations
		* @RDT_MODE_EXCLUSIVE: No sharing of this resource group's allocations allowed
		*
		* The mode of a resource group enables control over the allowed overlap
		* between allocations associated with different resource groups (classes
		@@ -91,6 +92,7 @@ enum rdt_group_type {
		*/
		enum rdtgrp_mode {
		RDT_MODE_SHAREABLE = 0,
		RDT_MODE_EXCLUSIVE,

		/* Must be last */
		RDT_NUM_MODES,

arch/x86/kernel/cpu/intel_rdt_rdtgroup.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -161,6 +161,7 @@ enum rdtgrp_mode rdtgroup_mode_by_closid(int closid)

		static const char * const rdt_mode_str[] = {
		[RDT_MODE_SHAREABLE] = "shareable",
		[RDT_MODE_EXCLUSIVE] = "exclusive",
		};

		/**