Commit-ID: bc61c3ef346945e87fa6312748fd1665c16200b3 Gitweb: https://git.kernel.org/tip/bc61c3ef346945e87fa6312748fd1665c16200b3 Author: Reinette Chatre <reinette.cha...@intel.com> AuthorDate: Tue, 29 May 2018 05:57:33 -0700 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Wed, 20 Jun 2018 00:56:29 +0200
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.cha...@intel.com> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: fenghua...@intel.com Cc: tony.l...@intel.com Cc: vikas.shiva...@linux.intel.com Cc: gavin.hind...@intel.com Cc: jithu.jos...@intel.com Cc: dave.han...@intel.com Cc: h...@zytor.com Link: https://lkml.kernel.org/r/cea76188c5b30cffaf89ad5c7efd66a3e7f105d4.1527593970.git.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 e59c8751293b..43b532bea735 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", }; /**
