Re: [PATCH 2/7] x86/cpufeatures: Enumerate ENQCMD and ENQCMDS instructions

Thomas Gleixner
2020-04-26T11:06:49Z

Fenghua Yu <fenghua.yu@intel.com> writes:
> A user space application can execute ENQCMD instruction to submit work
> to device. The kernel executes ENQCMDS instruction to submit work to
> device.

So a user space application _can_ execute ENQCMD and the kernel
executes ENQCMDS. And both submit work to device.

> There is a lot of other enabling needed for the instructions to actually
> be usable in user space and the kernel, and that enabling is coming later
> in the series and in device drivers.

That's important information to the enumeration of the instructions in
which way?

Thanks,

tglx