[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 at nvidia.com>
>>
>> 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 at nvidia.com>
>> ---
>>   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 at nvidia.com>
> 
> Jason
>