RAW Command Interface for Memory Devices
configname: CONFIG_CXL_MEM_RAW_COMMANDS
Linux Kernel Configuration
└─>Device Drivers
└─>CXL (Compute Express Link) Devices Support
└─>RAW Command Interface for Memory Devices
In linux kernel since version 5.2 (release Date: 2019-07-07)
Enable CXL RAW command interface.
The CXL driver ioctl interface may assign a kernel ioctl command
number for each specification defined opcode. At any given point in
time the number of opcodes that the specification defines and a device
may implement may exceed the kernel's set of associated ioctl function
numbers. The mismatch is either by omission, specification is too new,
or by design. When prototyping new hardware, or developing / debugging
the driver it is useful to be able to submit any possible command to
the hardware, even commands that may crash the kernel due to their
potential impact to memory currently in use by the kernel.
If developing CXL hardware or the driver say Y, otherwise say N.
The CXL driver ioctl interface may assign a kernel ioctl command
number for each specification defined opcode. At any given point in
time the number of opcodes that the specification defines and a device
may implement may exceed the kernel's set of associated ioctl function
numbers. The mismatch is either by omission, specification is too new,
or by design. When prototyping new hardware, or developing / debugging
the driver it is useful to be able to submit any possible command to
the hardware, even commands that may crash the kernel due to their
potential impact to memory currently in use by the kernel.
If developing CXL hardware or the driver say Y, otherwise say N.