Commit a5b69966 authored by Babu Moger's avatar Babu Moger Committed by Borislav Petkov (AMD)
Browse files

x86/resctrl: Add a new resource type RDT_RESOURCE_SMBA 



Add a new resource type RDT_RESOURCE_SMBA to handle the QoS enforcement
policies on the external slow memory.

Mostly initialization of the essentials. Setting fflags to RFTYPE_RES_MB
configures the SMBA resource to have the same resctrl files as the
existing MBA resource. The SMBA resource has identical properties to
the existing MBA resource. These properties will be enumerated in an
upcoming change and exposed via resctrl because of this flag.

Signed-off-by: default avatarBabu Moger <babu.moger@amd.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/r/20230113152039.770054-4-babu.moger@amd.com
parent f334f723

arch/x86/kernel/cpu/resctrl/core.c

+12 −0
Original line number Diff line number Diff line
@@ -100,6 +100,18 @@ struct rdt_hw_resource rdt_resources_all[] = { 
			.fflags			= RFTYPE_RES_MB,

		},

	},

	[RDT_RESOURCE_SMBA] =

	{

		.r_resctrl = {

			.rid			= RDT_RESOURCE_SMBA,

			.name			= "SMBA",

			.cache_level		= 3,

			.domains		= domain_init(RDT_RESOURCE_SMBA),

			.parse_ctrlval		= parse_bw,

			.format_str		= "%d=%*u",

			.fflags			= RFTYPE_RES_MB,

		},

	},

};



/*

arch/x86/kernel/cpu/resctrl/internal.h

+1 −0
Original line number Diff line number Diff line
@@ -409,6 +409,7 @@ enum resctrl_res_level { 
	RDT_RESOURCE_L3,

	RDT_RESOURCE_L2,

	RDT_RESOURCE_MBA,

	RDT_RESOURCE_SMBA,



	/* Must be the last */

	RDT_NUM_RESOURCES,