Re: [PATCH rdma-next 1/2] arm64/io: add memcpy_toio_64

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On Thu, 2024-01-18 at 10:00 -0400, Jason Gunthorpe wrote:
> On Thu, Jan 18, 2024 at 02:46:40PM +0100, Niklas Schnelle wrote:
> 
> > Yes, we need zpci_memcpy_toio(to, from, count * 8) since our count is
> > in bytes like for memcpy_toio().
> 
> https://github.com/jgunthorpe/linux/commits/mlx5_wc/
> 
> Jason
> 

Thanks, the s390 patches:


s390: Implement __iowrite32_copy() 
s390: Use the correct count for __iowrite64_copy() 
s390: Stop using weak symbols for __iowrite64_copy() 

Look good to me. I.e. you may add my.

Acked-by Niklas Schnelle <schnelle@xxxxxxxxxxxxx>

I did test your patches too and by accident confirmed again that these
do need commit 80df7d6af7f6 ("s390/pci: fix max size calculation in
zpci_memcpy_toio()") from the s390 feature branch to get the mlx5
driver to detect Write-Combining as supported. Note, as far as I know
Alexander Gordeev is targeting that one for v6.8-rc2 since we had quite
a few changes for v6.8-rc1.

Thanks,
Niklas





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