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maoxiaochuan 5665f2c387 LoongArch: Add HOTPLUG_SMT implementation 
For benchmarking or debugging purpose, we usually want to control SMT
via boot parameter and sysfs knobs. So add HOTPLUG_SMT implementation.

1. Boot parameters:

nosmt:		Disable SMT, can be enabled via sysfs knobs.
nosmt=force:	Disable SMT, cannot be enabled via sysfs knobs.

2. Runtime sysfs controls:

Write "on", "off", "forceoff" or the number of SMT threads (1, 2, ...)
to /sys/devices/system/cpu/smt/control.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
2026-08-24 14:17:22 +08:00
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ABI
init src (linux-6.12.0)
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accel
init src (linux-6.12.0)
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accounting
init src (linux-6.12.0)
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admin-guide
LoongArch: Add HOTPLUG_SMT implementation
2026-08-24 14:17:22 +08:00
arch
init src (linux-6.12.0)
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block
init src (linux-6.12.0)
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bpf
init src (linux-6.12.0)
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cdrom
init src (linux-6.12.0)
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core-api
init src (linux-6.12.0)
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cpu-freq
init src (linux-6.12.0)
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crypto
init src (linux-6.12.0)
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dev-tools
init src (linux-6.12.0)
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devicetree
dt-bindings: interrupt-controller: loongson,pch-pic: Document address-cells
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doc-guide
init src (linux-6.12.0)
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driver-api
init src (linux-6.12.0)
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fault-injection
init src (linux-6.12.0)
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fb
init src (linux-6.12.0)
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features
init src (linux-6.12.0)
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filesystems
init src (linux-6.12.0)
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firmware_class
init src (linux-6.12.0)
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firmware-guide
init src (linux-6.12.0)
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fpga
init src (linux-6.12.0)
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gpu
init src (linux-6.12.0)
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hid
init src (linux-6.12.0)
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hwmon
init src (linux-6.12.0)
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i2c
init src (linux-6.12.0)
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iio
init src (linux-6.12.0)
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images
init src (linux-6.12.0)
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infiniband
init src (linux-6.12.0)
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input
init src (linux-6.12.0)
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isdn
init src (linux-6.12.0)
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kbuild
init src (linux-6.12.0)
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kernel-hacking
init src (linux-6.12.0)
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leds
init src (linux-6.12.0)
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litmus-tests
init src (linux-6.12.0)
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livepatch
init src (linux-6.12.0)
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locking
init src (linux-6.12.0)
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maintainer
init src (linux-6.12.0)
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mhi
init src (linux-6.12.0)
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misc-devices
init src (linux-6.12.0)
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mm
init src (linux-6.12.0)
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netlabel
init src (linux-6.12.0)
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netlink
init src (linux-6.12.0)
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networking
init src (linux-6.12.0)
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nvdimm
init src (linux-6.12.0)
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nvme
init src (linux-6.12.0)
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PCI
init src (linux-6.12.0)
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pcmcia
init src (linux-6.12.0)
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peci
init src (linux-6.12.0)
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power
init src (linux-6.12.0)
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process
init src (linux-6.12.0)
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RCU
init src (linux-6.12.0)
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rust
init src (linux-6.12.0)
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scheduler
init src (linux-6.12.0)
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scsi
init src (linux-6.12.0)
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security
init src (linux-6.12.0)
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sound
init src (linux-6.12.0)
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sphinx
init src (linux-6.12.0)
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sphinx-static
init src (linux-6.12.0)
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spi
init src (linux-6.12.0)
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staging
init src (linux-6.12.0)
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target
init src (linux-6.12.0)
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tee
init src (linux-6.12.0)
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timers
init src (linux-6.12.0)
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tools
init src (linux-6.12.0)
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trace
init src (linux-6.12.0)
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translations
init src (linux-6.12.0)
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usb
init src (linux-6.12.0)
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userspace-api
init src (linux-6.12.0)
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virt
init src (linux-6.12.0)
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w1
init src (linux-6.12.0)
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watchdog
init src (linux-6.12.0)
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wmi
init src (linux-6.12.0)
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.gitignore
init src (linux-6.12.0)
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atomic_bitops.txt
init src (linux-6.12.0)
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atomic_t.txt
init src (linux-6.12.0)
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Changes
init src (linux-6.12.0)
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CodingStyle
init src (linux-6.12.0)
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conf.py
init src (linux-6.12.0)
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docutils.conf
init src (linux-6.12.0)
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dontdiff
init src (linux-6.12.0)
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index.rst
init src (linux-6.12.0)
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Kconfig
init src (linux-6.12.0)
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Makefile
init src (linux-6.12.0)
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memory-barriers.txt
init src (linux-6.12.0)
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SubmittingPatches
init src (linux-6.12.0)
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subsystem-apis.rst
init src (linux-6.12.0)
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