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x86/intel_rdt: Introduce new "exclusive" mode

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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
This commit is contained in:
Reinette Chatre 2018-06-22 15:42:00 -07:00 committed by Thomas Gleixner
parent 95f0b77efa
commit 414dd2b473
2 changed files with 3 additions and 0 deletions
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2
arch/x86/kernel/cpu/intel_rdt.h
View File

@ -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,

1
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
View File

@ -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",
};
/**