Re: [PPC] Boot problems after the pci-v6.18-changes
Christian Zigotzky <[email protected]>
| Newsgroups | gmane.linux.kernel.pci,gmane.linux.ports.ppc64.devel,gmane.linux.debian.ports.powerpc |
|---|---|
| Organization | A-EON Open Source |
| Message-ID | <[email protected]> |
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
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