Re: [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK

[Christophe Leroy]

Le 06/02/2020 Ã 21:31, Guenter Roeck a ÃcritÂ:
> On Sat, Dec 21, 2019 at 08:32:38AM +0000, Christophe Leroy wrote:
> > A few changes to retrieve DAR and DSISR from struct regs
> > instead of retrieving them directly, as they may have
> > changed due to a TLB miss.
> >
> > Also modifies hash_page() and friends to work with virtual
> > data addresses instead of physical ones. Same on load_up_fpu()
> > and load_up_altivec().
> >
> > Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
>
> This patch results in qemu boot failures (mac99 with pmac32_defconfig).
> Images fail silently; there is no console output. Reverting the patch
> fixes the problem. Bisect log is attached below.
>
> Assuming this was tested on real hardware, am I correct to assume that qemu
> for ppc32 (more specifically, qemu's mac99 and g3beige machines) no longer
> works with the upstream kernel ?

Before submitting the series, I successfully tested:
- Real HW with powerpc 8xx
- Real HW with powerpc 832x
- Qemu's mac99

I'll re-check the upstream kernel.

In the mean time, you can still unselect CONFIG_VMAP_STACK in your config.

Christophe