how to check for "optional" ppc chip features (MSR_BE)

[Kumar Gala]

On May 13, 2008, at 2:33 PM, Roland McGrath wrote:

>> So it looks like we need to define a new feature bit to mean  
>> "supports
>> block-step".  Is this something that userspace will expect to be told
>> about via the AT_HWCAP entry in the aux vector?
>
> I don't care to have userland know about it.  I'm just concerned  
> with the
> arch_has_block_step() definition being right.  But, you did  
> previously tell
> me that userland can set its own MSR_SE via sigreturn or setcontext or
> something.  If it can set its own MSR_BE the same way, then perhaps
> userland wants to know.

Did we close on this, I'm going to test Roland's patch on book-e and  
will post results.

- k