Commit f04046f2 authored by James Morse's avatar James Morse Committed by Catalin Marinas
Browse files

arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate 



Probing MPAM is convoluted. MSCs that are integrated with a CPU may
only be accessible from those CPUs, and they may not be online.
Touching the hardware early is pointless as MPAM can't be used until
the system-wide common values for num_partid and num_pmg have been
discovered.

Start with driver probe/remove and mapping the MSC.

Cc: Carl Worth <carl@os.amperecomputing.com>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: default avatarFenghua Yu <fenghuay@nvidia.com>
Reviewed-by: default avatarShaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: default avatarFenghua Yu <fenghuay@nvidia.com>
Tested-by: default avatarShaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: default avatarPeter Newman <peternewman@google.com>
Tested-by: default avatarCarl Worth <carl@os.amperecomputing.com>
Tested-by: default avatarGavin Shan <gshan@redhat.com>
Tested-by: default avatarZeng Heng <zengheng4@huawei.com>
Tested-by: default avatarHanjun Guo <guohanjun@huawei.com>
Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarBen Horgan <ben.horgan@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 115c5325

arch/arm64/Kconfig

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Original line number Diff line number Diff line
@@ -2025,6 +2025,7 @@ config ARM64_TLB_RANGE 


config ARM64_MPAM

	bool "Enable support for MPAM"

	select ARM64_MPAM_DRIVER if EXPERT	# does nothing yet

	select ACPI_MPAM if ACPI

	help

	  Memory System Resource Partitioning and Monitoring (MPAM) is an

drivers/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -251,4 +251,6 @@ source "drivers/hte/Kconfig" 


source "drivers/cdx/Kconfig"



source "drivers/resctrl/Kconfig"



endmenu

drivers/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -194,6 +194,7 @@ obj-$(CONFIG_HTE) += hte/ 
obj-$(CONFIG_DRM_ACCEL)		+= accel/

obj-$(CONFIG_CDX_BUS)		+= cdx/

obj-$(CONFIG_DPLL)		+= dpll/

obj-y				+= resctrl/



obj-$(CONFIG_DIBS)		+= dibs/

obj-$(CONFIG_S390)		+= s390/

drivers/resctrl/Kconfig

0 → 100644
+15 −0
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menuconfig ARM64_MPAM_DRIVER

	bool "MPAM driver"

	depends on ARM64 && ARM64_MPAM && EXPERT

	help

	  Memory System Resource Partitioning and Monitoring (MPAM) driver for

	  System IP, e.g. caches and memory controllers.



if ARM64_MPAM_DRIVER



config ARM64_MPAM_DRIVER_DEBUG

	bool "Enable debug messages from the MPAM driver"

	help

	  Say yes here to enable debug messages from the MPAM driver.



endif

drivers/resctrl/Makefile

0 → 100644
+4 −0
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obj-$(CONFIG_ARM64_MPAM_DRIVER)			+= mpam.o

mpam-y						+= mpam_devices.o



ccflags-$(CONFIG_ARM64_MPAM_DRIVER_DEBUG)	+= -DDEBUG