linux-kernel - Re: [RFC 0/2] PCI/ASPM: Allow controller-defined default link state

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Message-ID: <7a229e18-fbfd-8652-ec2e-a3a3273f7fac@panix.com>
Date: Wed, 16 Jul 2025 23:12:45 -0700 (PDT)
From: "Kenneth R. Crudup" <kenny@...ix.com>
To: "David E. Box" <david.e.box@...ux.intel.com>
cc: rafael@...nel.org, bhelgaas@...gle.com, vicamo.yang@...onical.com, 
    ilpo.jarvinen@...ux.intel.com, nirmal.patel@...ux.intel.com, 
    linux-pm@...r.kernel.org, linux-pci@...r.kernel.org, 
    linux-kernel@...r.kernel.org, "Kenneth R. Crudup" <kenny@...ix.com>
Subject: Re: [RFC 0/2] PCI/ASPM: Allow controller-defined default link
 state


Unfortunately, having tested the patch (against Linus' master), it doesn't work.

I don't think the ASPM(?) state is making it to the VMD.

LMK if you need more info.

-Kenny

On Wed, 16 Jul 2025, David E. Box wrote:

> Testing is appreciated as I didn't get a chance to do so yet but plan to.

> Thanks, David
>
> ---
>
> David E. Box (2):
>   PCI/ASPM: Allow drivers to provide ASPM link state via pci_bus
>   PCI: vmd: Provide default ASPM link state for synthetic hierarchy
>
>  drivers/pci/controller/vmd.c |  7 +++++--
>  drivers/pci/pcie/aspm.c      |  5 ++++-
>  include/linux/pci.h          | 12 ++++++++----
>  3 files changed, 17 insertions(+), 7 deletions(-)
>
>
> base-commit: d0b3b7b22dfa1f4b515fd3a295b3fd958f9e81af
>

-- 
Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA