Re: [PATCH] target/ppc: fix Hash64 MMU update of PTE bit R

[Leandro Lupori]

On 24/11/2021 16:52, Cédric Le Goater wrote:
> > It can be reproduced by trying to boot this iso: 
> > https://download.freebsd.org/ftp/snapshots/powerpc/powerpc64/ISO-IMAGES/14.0/FreeBSD-14.0-CURRENT-powerpc-powerpc64-20211028-4827bf76bce-250301-disc1.iso.xz 
> >
> >
> > It is easier to reproduce it using power8/powernv8.
>
> power8 only has Hash MMU. I understand that FreeBSD also supports power9
> processor. with radix ? and XIVE ?

Right, FreeBSD supports POWER9 with Radix, that is now the default MMU 
choice. To select Hash MMU, you need to pass radix_mmu=0 to kernel 
command line.
FreeBSD supports XIVE too, but only for PowerNV.

BTW, when trying to boot with Radix instead of Hash, a different issue 
happens. Boot goes further, but then programs start to get SIGILL or 
SIGSEGV.

> Thanks,
>
> C.

Thanks,
Leandro