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| author | Bjorn Helgaas <bhelgaas@google.com> | 2024-04-29 14:18:21 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-05-03 11:45:32 -0500 |
| commit | 2e0239d47d75e08f9a39f8360610e490c39ea696 (patch) | |
| tree | 0d22e83db81983f562b00e3afdb6e6da5157771c | |
| parent | 4cece764965020c22cff7665b18a012006359095 (diff) | |
| download | linux-2e0239d47d75e08f9a39f8360610e490c39ea696.tar.gz | |
PCI/ASPM: Clarify that pcie_aspm=off means leave ASPM untouched
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".
Link: https://lore.kernel.org/r/20240429191821.691726-1-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: David E. Box <david.e.box@linux.intel.com>
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index bb884c14b2f679..4bc281d6e8d31e 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. |