Re: [PATCH v1 4/9] powerpc: Convert to physical address DMA mapping

[Christophe Leroy]

Le 03/10/2025 à 18:35, Jason Gunthorpe a écrit :
> On Sun, Sep 28, 2025 at 06:02:24PM +0300, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro@xxxxxxxxxx>
> >
> > Adapt PowerPC DMA to use physical addresses in order to prepare code
> > to removal .map_page and .unmap_page.
> >
> > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
> > ---
> >   arch/powerpc/include/asm/iommu.h         |  8 +++---
> >   arch/powerpc/kernel/dma-iommu.c          | 22 +++++++---------
> >   arch/powerpc/kernel/iommu.c              | 14 +++++-----
> >   arch/powerpc/platforms/ps3/system-bus.c  | 33 ++++++++++++++----------
> >   arch/powerpc/platforms/pseries/ibmebus.c | 15 ++++++-----
> >   arch/powerpc/platforms/pseries/vio.c     | 21 ++++++++-------
> >   6 files changed, 60 insertions(+), 53 deletions(-)
>
> I think this is good enough for PPC anything more looks quite hard

Can you tell what you have in mind ? What more would be interesting to 
do but looks hard ? Maybe it can be a follow-up change ?

Christophe

> Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
>
> Jason