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.cha...@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 5f3915c2e599..399bb94e865b 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -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,
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index b2008c697ce0..739b1ecc2b80 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
