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    Subject[PATCH V5 08/38] 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 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
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