configs: Enable HOTPLUG_CPU

This works and can be useful for debugging/benchmarking/low power use $ nproc 4 $ echo 0 | sudo tee /sys/devices/system/cpu/cpu3/online 0 $ echo 0 | sudo tee /sys/devices/system/cpu/cpu2/online 0 $ echo 0 | sudo tee /sys/devices/system/cpu/cpu1/online 0 $ nproc 1 Signed-off-by: Dom Cobley <[email protected]>
raspberrypi · Oct 15, 2024 · eac6399 · eac6399
1 parent 4eb5854
commit eac6399
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diff --git a/arch/arm64/configs/bcm2711_defconfig b/arch/arm64/configs/bcm2711_defconfig
@@ -48,6 +48,7 @@ CONFIG_ARM64_ERRATUM_2441009=y
 # CONFIG_CAVIUM_ERRATUM_27456 is not set
 CONFIG_ARM64_VA_BITS_39=y
 CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
 CONFIG_COMPAT=y
 CONFIG_ARMV8_DEPRECATED=y
 CONFIG_SWP_EMULATION=y

diff --git a/arch/arm64/configs/bcm2712_defconfig b/arch/arm64/configs/bcm2712_defconfig
@@ -49,6 +49,7 @@ CONFIG_ARM64_ERRATUM_2441009=y
 CONFIG_ARM64_16K_PAGES=y
 CONFIG_ARM64_VA_BITS_47=y
 CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
 CONFIG_COMPAT=y
 CONFIG_ARMV8_DEPRECATED=y
 CONFIG_SWP_EMULATION=y