Re: [PATCH 2/5] powerpc/microwatt: Device-tree updates

[Segher Boessenkool <segher@kernel.crashing.org>]

On Wed, Jan 29, 2025 at 04:36:14PM +1000, Nicholas Piggin wrote:
> On Wed Jan 29, 2025 at 8:52 AM AEST, Paul Mackerras wrote:
> > Microwatt now implements ISA v3.1 (SFFS compliancy subset), including
> > prefixed instructions, scv/rfscv, and the FSCR, HFSCR, TAR, and CTRL
> > registers.  The privileged mode of operation is now hypervisor mode
> > and there is no privileged non-hypervisor mode; the MSR[HV] bit is
> > forced to 1.
> 
> Cool. Lots of development in microwatt.
> 
> Come to think of it we should have put a broadcast-tlbie feature
> in there and you wouldn't need the other patch. That can go on
> the todo list I guess.
> 
> system-call-vectored was available in ISA v3.0. Not that we do much
> with it at the moment IIRC, but there were dreams of wiring it in for
> compat guests. With that fixed,

This patch says 2.07 for it (if that is what 2070 mens(if that is what
2070 means).  Something's not right :-)

> > +			system-call-vectored {
> > +				isa = <2070>;
> > +				usable-privilege = <7>;
> > +				os-support = <1>;
> > +				fscr-bit-nr = <12>;
> > +				hwcap-bit-nr = <52>;
> >  			};


Segher