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The Linux kernel configuration item CONFIG_SGI_GRU
:
CONFIG_X86_UV && CONFIG_SMP
gru
The GRU is a hardware resource located in the system chipset. The GRU contains memory that can be mmapped into the user address space. This memory is used to communicate with the GRU to perform functions such as load/store, scatter/gather, bcopy, AMOs, etc. The GRU is directly accessed by user instructions using user virtual addresses. GRU instructions (ex., bcopy) use user virtual addresses for operands.
If you are not running on a SGI UV system, say N.
Raw data from LKDDb:
lkddb module gru CONFIG_SGI_GRU : drivers/misc/Kconfig : "SGI GRU driver" # in 2.6.27–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
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Automatically generated (in year 2024). See also LKDDb sources on GitLab