On Sat, Oct 04, 2025 at 08:19:40AM +0200, Christophe Leroy wrote: > > > 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 <[email protected]> > > > > > > Adapt PowerPC DMA to use physical addresses in order to prepare code > > > to removal .map_page and .unmap_page. > > > > > > Signed-off-by: Leon Romanovsky <[email protected]> > > > --- > > > 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 ?
The phys_addr_t should be pushed down through the ops function pointer and only the implementations that need the vaddr should call virt_to_phys() Ie try to avoid doing phys -> virt -> phys as it is not efficient. Jason
