Difference between revisions of "Skiboot/NVRAM"
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(Created page with "Loose collection of known NVRAM settings in Skiboot: == pcie-max-link-speed == Description: PCIe Link Speed Cap To cap the link speed, change the "pcie-max-link-speed" vari...") |
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| − | + | = Known NVRAM settings in Skiboot = | |
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| + | A loose collection of known NVRAM settings in Skiboot. These should eventually be exposed via the Petiboot TUI. | ||
== pcie-max-link-speed == | == pcie-max-link-speed == | ||
| − | Description | + | === Description === |
| + | PCIe Link Speed Cap | ||
| + | === Details === | ||
To cap the link speed, change the "pcie-max-link-speed" variable to the maximum generation you want to support and re-IPL the machine. For instance, to cap at PCIe Generation 3, in the petitboot command line type: | To cap the link speed, change the "pcie-max-link-speed" variable to the maximum generation you want to support and re-IPL the machine. For instance, to cap at PCIe Generation 3, in the petitboot command line type: | ||
<nowiki>nvram -p ibm,skiboot --update-config pcie-max-link-speed=3</nowiki> | <nowiki>nvram -p ibm,skiboot --update-config pcie-max-link-speed=3</nowiki> | ||
Revision as of 15:08, 18 October 2018
Known NVRAM settings in Skiboot
A loose collection of known NVRAM settings in Skiboot. These should eventually be exposed via the Petiboot TUI.
pcie-max-link-speed
Description
PCIe Link Speed Cap
Details
To cap the link speed, change the "pcie-max-link-speed" variable to the maximum generation you want to support and re-IPL the machine. For instance, to cap at PCIe Generation 3, in the petitboot command line type:
nvram -p ibm,skiboot --update-config pcie-max-link-speed=3
