Date: Tue, 18 Nov 2025 11:18:19 -0600 (CST) From: Timothy Pearson <tpearson@raptorengineering.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: Warner Losh <imp@bsdimp.com>, "freebsd-arch@freebsd.org" <arch@freebsd.org> Subject: Re: What's the plan for powerpc64 in FreeBSD 16 Message-ID: <103937333.116931.1763486299091.JavaMail.zimbra@raptorengineeringinc.com> In-Reply-To: <aRxUa5u1ZKrTTt1b@kib.kiev.ua> References: <1795409779.114152.1763457185418.JavaMail.zimbra@raptorengineeringinc.com> <875004641.116392.1763457737172.JavaMail.zimbra@raptorengineeringinc.com> <aRxF5b9HIBKw3h8D@kib.kiev.ua> <1827088521.116443.1763460735444.JavaMail.zimbra@raptorengineeringinc.com> <aRxUa5u1ZKrTTt1b@kib.kiev.ua>
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----- Original Message ----- > From: "Konstantin Belousov" <kostikbel@gmail.com> > To: "Timothy Pearson" <tpearson@raptorengineering.com> > Cc: "Warner Losh" <imp@bsdimp.com>, "freebsd-arch@freebsd.org" <arch@freebsd.org> > Sent: Tuesday, November 18, 2025 5:11:39 AM > Subject: Re: What's the plan for powerpc64 in FreeBSD 16 > On Tue, Nov 18, 2025 at 04:12:15AM -0600, Timothy Pearson wrote: >> >> >> ----- Original Message ----- >> > From: "Konstantin Belousov" <kostikbel@gmail.com> >> > To: "Timothy Pearson" <tpearson@raptorengineering.com> >> > Cc: "Warner Losh" <imp@bsdimp.com>, "freebsd-arch@freebsd.org" >> > <arch@freebsd.org> >> > Sent: Tuesday, November 18, 2025 4:09:41 AM >> > Subject: Re: What's the plan for powerpc64 in FreeBSD 16 >> >> > Can we please, as the part of the commitment for the ppc support, have >> > a patch submitted for the rtld wart fix? >> > I mean, we should have properly architectured hook for ppc64 to do the >> > hack in libexec/rtld-elf/rtld.c under the #ifdef powerpc, for auxv >> > renumbering compat. >> >> I don't see why not. This is exactly the reason we have FTE resources assigned >> to maintain the software ecosystem for ppc64 -- if there are any other such >> issues just let me know and I'll make sure they get fixed. > > Great. > In fact, I went ahead and drafted the change I want, in > https://reviews.freebsd.org/D53801 > > I am not sure if this is needed for both ppc and ppc64/ppc64le. > Also I did not handled other arches until ppc part is finalized. > > Could you please get somebody answer the question above, and then > have the patch tested, please? Great, thank you for putting that together! This should be required for all ppc* including 32-bit per my understanding. As a historical note / aside, 32-bit support is not of any importance to the general modern POWER ecosystem at this point; I'm on the architectural committee handling the ISA specification, and in general we have no desire to attempt to add 32-bit support to the current POWER standards. I personally wouldn't be opposed to seeing 32-bit support disappear at this point; it was never properly standardized and I have no idea what kind of hardware would actually execute 32-bit FreeBSD kernels at this point. I'll get testing results back later today and update the diff log. One other question -- is there a way Raptor (or even just myself) can get approval rights for changes that touch the ppc* code? One of the reasons we haven't been pushing as much code upstream as we'd like is that we've had a lot of stalls in the review and merge process due to what I assume is lack of reviewer availability / hardware availability, and I want to see if we can help make that process faster. We have a datacenter full of POWER boxes and would be happy to provide remote access (including bare metal) free of charge to anyone that is blocked on hardware availability. Thanks again!
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