Re: [PATCH v2] Documentation: Fill the gaps about entry/noinstr constraints

[Mark Rutland]

On Fri, Dec 03, 2021 at 07:48:08PM -0800, Randy Dunlap wrote:
> On 12/1/21 12:35, Thomas Gleixner wrote:
> > +Aside of that many architectures have to save register state, e.g. debug or
> 
>                                                           state (e.g. debug) or
> 
> > +cause registers before another exception of the same type can happen. A
> 
>    ^^^^^ cannot parse (with or without the change to the previous line)

I think the difficulty here is with "cause register"? That' a register which
indicates the cause of an exception, e.g.

* MIPS has `cause` (coprocessor 0 register 13)
* arm64 / AArch64 has `ESR_ELx` (Exception Syndrome Register, ELx)

We could probably clarify this as "exception cause registers" or "exception
status registers", if that helps?

Thanks,
Mark.