Subject: Re: linux-next: boot failure after merge of the dma-mapping tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 10 Jul 2025 09:46:12 +1000

Hi Leon,

On Wed, 9 Jul 2025 20:41:08 +0300 Leon Romanovsky <[email-masked]> wrote:
>
> Can you please provide the kernel command line to determine which DMA
> path is taken?

Sorry I did not respond earlier (your email arrived at 3:41am my time
:-)) but you seem to have figured it out, thanks.  I will let you know
this evening if it has not worked.

For reference the qemu command line was

qemu-system-ppc64 -M pseries,cap-hpt-max-page-size=4k,accel=kvm -m 2G -vga none -nographic -enable-kvm -kernel $vmlinux -initrd $initrd

The kernel was a powercp pseries_le_defconfig build (but setting
CONFIG_PPC_4K_PAGES=y instead of CONFIG_PPC_64K_PAGES=y).
-- 
Cheers,
Stephen Rothwell