Pierre Gondois 740fcdc2c2 cpufreq: CPPC: Register EM based on efficiency class information ... Performance states and energy consumption values are not advertised in ACPI. In the GicC structure of the MADT table, the "Processor Power Efficiency Class field" (called efficiency class from now) allows to describe the relative energy efficiency of CPUs. To leverage the EM and EAS, the CPPC driver creates a set of artificial performance states and registers them in the Energy Model (EM), such as: - Every 20 capacity unit, a performance state is created. - The energy cost of each performance state gradually increases. No power value is generated as only the cost is used in the EM. During task placement, a task can raise the frequency of its whole pd. This can make EAS place a task on a pd with CPUs that are individually less energy efficient. As cost values are artificial, and to place tasks on CPUs with the lower efficiency class, a gap in cost values is generated for adjacent efficiency classes. E.g.: - efficiency class = 0, capacity is in [0-1024], so cost values are in [0: 51] (one performance state every 20 capacity unit) - efficiency class = 1, capacity is in [0-1024], cost values are in [1*gap+0: 1*gap+51]. The value of the cost gap is chosen to absorb a the energy of 4 CPUs at their maximum capacity. This means that between: 1- a pd of 4 CPUs, each of them being used at almost their full capacity. Their efficiency class is N. 2- a CPU using almost none of its capacity. Its efficiency class is N+1 EAS will choose the first option. This patch also populates the (struct cpufreq_driver).register_em callback if the valid efficiency_class ACPI values are provided. Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2022-05-06 21:01:17 +02:00
..
accessibility
acpi	Merge branch 'acpi-bus'	2022-04-08 19:50:44 +02:00
amba
android
ata	ata: pata_marvell: Check the 'bmdma_addr' beforing reading	2022-04-22 08:45:06 +09:00
atm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-03-17 13:56:58 -07:00
auxdisplay	auxdisplay: lcd2s: Use array size explicitly in lcd2s_gotoxy()	2022-03-18 20:31:14 +01:00
base	net: mdio: don't defer probe forever if PHY IRQ provider is missing	2022-04-08 14:17:55 -07:00
bcma	Core MTD changes:	2022-03-25 13:35:34 -07:00
block	block: null_blk: end timed out poll request	2022-04-14 10:16:33 -06:00
bluetooth	Bluetooth: ath3k: remove superfluous header files	2022-03-18 17:12:09 +01:00
bus	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
cdrom	cdrom: remove unused variable	2022-04-06 08:47:52 -06:00
char	random: use memmove instead of memcpy for remaining 32 bytes	2022-04-16 12:53:31 +02:00
clk	A single revert to fix a boot regression seen when clk_put() started	2022-04-03 12:21:14 -07:00
clocksource	asm-generic updates for 5.18	2022-03-23 18:03:08 -07:00
comedi
connector
counter	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
cpufreq	cpufreq: CPPC: Register EM based on efficiency class information	2022-05-06 21:01:17 +02:00
cpuidle	cpuidle: riscv: support non-SMP config	2022-04-19 17:42:08 -07:00
crypto	virtio: features, fixes	2022-03-31 13:57:15 -07:00
cxl	cxl/pci: Drop shadowed variable	2022-04-08 12:59:43 -07:00
dax	dax for 5.18	2022-03-24 18:12:09 -07:00
dca
devfreq
dio
dma	dmaengine: idxd: skip clearing device context when device is read-only	2022-04-20 17:24:43 +05:30
dma-buf	dma-buf: handle empty dma_fence_arrays gracefully	2022-03-29 09:14:30 +02:00
edac	EDAC/synopsys: Read the error count from the correct register	2022-04-14 14:44:49 +02:00
eisa
extcon
firewire
firmware	sound fixes for 5.18-rc4	2022-04-22 13:11:38 -07:00
fpga
fsi
gnss
gpio	gpio: Request interrupts after IRQ is initialized	2022-04-22 13:59:19 -07:00
gpu	Two fixes for the raspberrypi panel initialisation, one fix for a logic	2022-04-23 15:00:44 +10:00
greybus
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2022-04-01 10:14:32 -07:00
hsi
hv	hyperv-fixes for 5.18-rc2	2022-04-07 06:35:34 -10:00
hwmon	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
hwspinlock	hwspinlock: sprd: Use struct_size() helper in devm_kzalloc()	2022-03-11 14:56:57 -06:00
hwtracing	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
i2c	i2c: ismt: Fix undefined behavior due to shift overflowing the constant	2022-04-15 23:49:02 +02:00
i3c
idle	cpuidle: intel_idle: Drop redundant backslash at line end	2022-03-17 14:32:59 +01:00
iio	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
infiniband	RDMA/hfi1: Fix use-after-free bug for mm struct	2022-04-08 15:40:06 -03:00
input	Input updates for v5.18-rc3	2022-04-23 09:52:07 -07:00
interconnect
iommu	iommu/omap: Fix regression in probe for NULL pointer dereference	2022-04-08 11:16:29 +02:00
ipack
irqchip	irqchip/gic, gic-v3: Prevent GSI to SGI translations	2022-04-05 16:33:47 +01:00
isdn	mISDN: fix typo "frame to short" -> "frame too short"	2022-03-21 13:26:38 +00:00
leds	LED updates for 5.18-rc1. Nothing major here, there are two drivers	2022-03-27 14:09:48 -07:00
macintosh
mailbox	mailbox: ti-msgmgr: Operate mailbox in polled mode during system suspend	2022-03-12 19:33:30 -06:00
mcb
md	block-5.18-2022-04-22	2022-04-23 09:46:44 -07:00
media	media: si2157: unknown chip version Si2147-A30 ROM 0x50	2022-04-09 17:45:49 +02:00
memory	memory: fsl_ifc: populate child nodes of buses and mfd devices	2022-04-06 09:39:16 +02:00
memstick
message	scsi: message: fusion: Remove redundant variable dmp	2022-04-06 22:28:07 -04:00
mfd	- New Drivers	2022-03-25 13:56:18 -07:00
misc	habanalabs: Fix test build failures	2022-04-04 17:03:04 +02:00
mmc	mmc: core: improve API to make clear mmc_hw_reset is for cards	2022-04-08 11:00:08 +02:00
most
mtd	This pull request contains fixes for JFFS2, UBI and UBIFS	2022-03-31 16:09:41 -07:00
mux
net	drivers: net: hippi: Fix deadlock in rr_close()	2022-04-21 10:30:45 +02:00
nfc	spi: Updates for v5.18	2022-03-21 18:33:57 -07:00
ntb
nubus
nvdimm	libnvdimm for 5.18	2022-03-30 10:04:11 -07:00
nvme	nvme-pci: disable namespace identifiers for Qemu controllers	2022-04-15 06:56:17 +02:00
nvmem	nvmem: brcm_nvram: parse NVRAM content into NVMEM cells	2022-03-18 14:08:36 +01:00
of	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
opp	PM: EM: Change the order of arguments in the .active_power() callback	2022-04-13 16:26:17 +02:00
parisc	parisc: Fix CPU affinity for Lasi, WAX and Dino chips	2022-03-29 21:37:12 +02:00
parport	parport_pc: Also enable driver for PCI systems	2022-03-18 14:01:41 +01:00
pci	hyperv-fixes for 5.18-rc2	2022-04-07 06:35:34 -10:00
pcmcia
peci
perf	arm_pmu: Validate single/group leader events	2022-04-13 11:48:45 +01:00
phy	phy: PHY_FSL_LYNX_28G should depend on ARCH_LAYERSCAPE	2022-03-29 08:45:16 -07:00
pinctrl	Pin control bulk changes for the v5.18 kernel cycle	2022-03-28 11:52:53 -07:00
platform	platform/x86: amd-pmc: Fix compilation without CONFIG_SUSPEND	2022-04-04 16:26:09 +02:00
pnp	PNP update for 5.18-rc1	2022-03-21 14:46:01 -07:00
power	power: supply: Reset err after not finding static battery	2022-04-13 12:05:22 +02:00
powercap	powercap: DTPM: Check for Energy Model type	2022-04-13 16:26:18 +02:00
pps	pps: generators: pps_gen_parport: Switch to use module_parport_driver()	2022-03-18 14:01:19 +01:00
ps3
ptp	ptp: ocp: handle error from nvmem_device_find	2022-03-30 12:08:11 -07:00
pwm
rapidio
ras
regulator	regulator: atc260x: Fix missing active_discharge_on setting	2022-04-04 08:59:43 +01:00
remoteproc	remoteproc updates for v5.18	2022-03-30 10:50:48 -07:00
reset	reset: tegra-bpmp: Restore Handle errors in BPMP response	2022-04-04 11:14:13 +02:00
rpmsg	rpmsg: ctrl: Introduce new RPMSG_CREATE/RELEASE_DEV_IOCTL controls	2022-03-13 11:49:53 -05:00
rtc	RTC for 5.18	2022-04-01 09:37:18 -07:00
s390	s390: cleanup timer API use	2022-03-27 22:18:39 +02:00
sbus
scsi	scsi: sr: Do not leak information in ioctl	2022-04-18 22:48:31 -04:00
sh
siox
slimbus
soc	Networking changes for 5.18.	2022-03-24 13:13:26 -07:00
soundwire	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
spi	spi: Fixes for v5.18	2022-04-19 10:30:43 -07:00
spmi
ssb
staging	staging: r8188eu: Fix PPPoE tag insertion on little endian systems	2022-04-04 16:35:20 +02:00
target	Merge branch '5.18/scsi-queue' into 5.18/scsi-fixes	2022-04-06 21:46:54 -04:00
tc
tee	ARM driver updates for 5.18	2022-03-23 18:23:13 -07:00
thermal	thermal: cooling: Check Energy Model type in cpufreq_cooling and devfreq_cooling	2022-04-13 16:26:18 +02:00
thunderbolt	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
tty	tty: serial: mpc52xx_uart: make rx/tx hooks return unsigned, part II.	2022-04-04 10:33:02 +02:00
uio
usb	xen: branch for v5.18-rc1	2022-03-28 14:32:39 -07:00
vdpa	virtio: fixes, cleanups	2022-04-05 10:40:52 -07:00
vfio	vfio/pci: Fix vf_token mechanism when device-specific VF drivers are used	2022-04-13 11:37:44 -06:00
vhost	virtio: features, fixes	2022-03-31 13:57:15 -07:00
video	fbdev: Fix unregistering of framebuffers without device	2022-04-06 21:12:28 +02:00
virt	Random number generator fixes for Linux 5.18-rc1.	2022-03-31 14:51:34 -07:00
virtio	virtio: fixes, cleanups	2022-04-05 10:40:52 -07:00
visorbus
vlynq
vme
w1	w1: w1_therm: Add support for Maxim MAX31850 thermoelement IF.	2022-03-18 14:07:09 +01:00
watchdog	linux-watchdog 5.18-rc1 tag	2022-03-31 14:14:03 -07:00
xen	xen: Convert kmap() to kmap_local_page()	2022-04-20 15:22:18 -05:00
zorro
Kconfig
Makefile