Re: [PPC] Boot problems after the pci-v6.18-changes

[Christian Zigotzky <chzigotzky@xenosoft.de>]

On 11/07/2025 06:06 AM, Christian Zigotzky wrote:
> On 11/05/2025 11:09 PM, Bjorn Helgaas wrote:
> >> I tested your patch with the RC4 of kernel 6.18 today. 
> Unfortunately it
> >> doesn't solve the boot issue.
> >
> > Thanks for testing that.  I see now why that approach doesn't work:
> > quirk_disable_aspm_l0s_l1() calls pci_disable_link_state(), which
> > updates the permissible ASPM link states, but pci_disable_link_state()
> > only works for devices at the downstream end of a link.  It doesn't
> > work at all for Root Ports, which are at the upstream end of a link.
> >
> > Christian, you originally reported that both X5000 and X1000 were
> > broken.  I suspect X1000 may have been fixed in v6.18-rc3 by
> > df5192d9bb0e ("PCI/ASPM: Enable only L0s and L1 for devicetree
> > platforms"), but I would love to have confirmation of that.
>
> Hello Bjorn,
>
> I will enable CONFIG_PCIEASPM and CONFIG_PCIEASPM_DEFAULT for the RC5 
> of kernel 6.18 and test it with the X1000.
>
> Thanks,
> christian
>

Hello Bjorn,

I tested the RC5 of kernel 6.18 with CONFIG_PCIEASPM and 
CONFIG_PCIEASPM_DEFAULT enabled on my X1000 today. Unfortunately the 
boot problems are still present.

Cheers,
Christian

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