Re: [LPC] pkeys ABI

On 6/17/26 14:57, Kevin Brodsky wrote:
> Hi,
> 
> I am considering submitting a Refereed presentation proposal for LPC,
> but I would first like to check if it makes sense to everyone in To/Cc.
> 
> The pkeys ABI is heavily underspecified when it comes to asynchronous
> kernel interactions, such as signal delivery [1], rseq [2], io_uring
> worker threads, etc. Depending on the situation, we might reset the pkey
> register to "allow all", or "allow acess to pkey 0 only", or use the
> interrupted context's register (even though it is arguably unrelated).
> It isn't always consistent across architectures either. 
> 
> As Thomas put it, "that's all broken". LPC feels like the right occasion
> to summarise where we are, and explore potential solutions.
> Unfortunately this topic isn't an obvious fit for any MC, so a Refereed
> presentation seems like the least bad option.

What about the Kernel Summit "[TECH TOPIC]" track? see
https://lpc.events/event/20/abstracts/

Seems like this would fit perfectly.

> Any thoughts/suggestions?
> 
> Thanks,
> - Kevin
> 
> PS: Cc'ing [email protected] as there is no dedicated mailing list
> for Refereed presentations.
> 
> [1]
> https://inbox.sourceware.org/libc-alpha/[email protected]/
> [2] https://lore.kernel.org/all/87ikexhbah.ffs@tglx/
>