Re: [PATCH V3 04/10] PCI/TPH: Add pci=nostmode to force No ST Mode

[Bjorn Helgaas]

On Thu, Aug 01, 2024 at 11:29:22PM -0500, Wei Huang wrote:
> On 7/23/24 17:44, Bjorn Helgaas wrote:
> > > +++ b/Documentation/admin-guide/kernel-parameters.txt
> > > @@ -4656,6 +4656,7 @@
> > >   		norid		[S390] ignore the RID field and force use of
> > >   				one PCI domain per PCI function
> > >   		notph		[PCIE] Do not use PCIe TPH
> > > +		nostmode	[PCIE] Force TPH to use No ST Mode
> > 
> > Needs a little more context here about what this means.  Users won't
> > know where to even look for "No ST Mode" unless they have a copy of
> > the spec.
> 
> I can certainly add more description to talk about "No ST Mode". Also, will
> "tph_nostmode" be better than "nostmode" in your opinion?

I don't really care about the parameter name.  I think just spelling
these out once, e.g., "PCIe TLP Processing Hints (TPH)" and "No ST
Mode (Steering Tags must be all zeros)" is probably enough context.