[QUESTION] powerpc, libseccomp, and spu

[Tom Hromatka]

On 2/11/19 11:54 AM, Tom Hromatka wrote:
> PowerPC experts,
> 
> Paul Moore and I are working on the v2.4 release of libseccomp,
> and as part of this work I need to update the syscall table for
> each architecture.
> 
> I have incorporated the new ppc syscall.tbl into libseccomp, but
> I am not familiar with the value of "spu" in the ABI column.  For
> example:
> 
> 22    32    umount                sys_oldumount
> 22    64    umount                sys_ni_syscall
> 22    spu    umount                sys_ni_syscall
> 
> In libseccomp, we maintain a 32-bit ppc syscall table and a 64-bit
> ppc syscall table.  Do we also need to add a "spu" ppc syscall
> table?  Some clarification on the syscalls marked "spu" and "nospu"
> would be greatly appreciated.
> 
> Thanks.
> 
> Tom


Thanks for the awesome responses, Ben and Michael.  I'll definitely
get Paul's input as well, but it sounds reasonable to exclude SPUs
from the newest libseccomp release.

Michael's recommendation to replace "nospu" with common" and ignore
"spu" entirely has allowed ppc and ppc64 to pass all of our internal
checks.

Thanks again!

Tom