Re: [RFC patch 00/15] entry: Provide generic implementation for host and guest entry/exit work

From: Thomas Gleixner
Date: Mon Sep 23 2019 - 16:50:26 EST


On Fri, 20 Sep 2019, Mark Rutland wrote:
> I've been working on converting the arm64 entry code to C for a while
> now [1], gradually upstreaming the bits I can.
>
> James has picked up some of that [2] as a prerequisite for some RAS
> error handling, and I think building the arm64 bits atop of that would
> be preferable. IIUC that should get posted as a series come -rc1.
>
> Since there's immense scope for subtle breakage, I'd prefer that we do
> the arm64-specific asm->C conversion before migrating arm64 to generic
> code. That way us arm64 folk can ensure the asm->C conversion retains
> the existing behaviour, and it'll be easier for everyone to compare the
> arm64 and generic C implementations.

Right. It still would be nice to have some feedback on the general
approach.

That sais I'm happy to let you screw your entry code up yourself :)

Thanks

tglx