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Subject[PATCH V3 08/39] x86/intel_rdt: Introduce new "exclusive" mode
Date
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>
---
arch/x86/kernel/cpu/intel_rdt.h | 2 ++
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 1 +
2 files changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index cc6e41ad9522..3fb6645de840 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -82,6 +82,7 @@ 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
@@ -90,6 +91,7 @@ enum rdt_group_type {
*/
enum rdtgrp_mode {
RDT_MODE_SHAREABLE = 0,
+ RDT_MODE_EXCLUSIVE,

/* Must be last */
RDT_NUM_MODES,
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index d66283f83ece..9afcb667df3a 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -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",
};

/**
--
2.13.6
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