On Mon, 2024-04-29 at 14:18 -0500, Bjorn Helgaas wrote: > From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > > Previously we claimed "pcie_aspm=off" meant that ASPM would be disabled, > which is wrong. > > Correct this to say that with "pcie_aspm=off", Linux doesn't touch any ASPM > configuration at all. ASPM may have been enabled by firmware, and that > will be left unchanged. See "aspm_support_enabled". > > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> LGTM. Reviewed-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx> > --- > Documentation/admin-guide/kernel-parameters.txt | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt > b/Documentation/admin-guide/kernel-parameters.txt > index bb884c14b2f6..4bc281d6e8d3 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -4590,9 +4590,10 @@ > norid [S390] ignore the RID field and force use of > one PCI domain per PCI function > > - pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State > Power > + pcie_aspm= [PCIE] Forcibly enable or ignore PCIe Active State > Power > Management. > - off Disable ASPM. > + off Don't touch ASPM configuration at all. Leave any > + configuration done by firmware unchanged. > force Enable ASPM even on devices that claim not to support > it. > WARNING: Forcing ASPM on may cause system lockups. >
