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I would like to know if there is any way to enable a specific feature in the CPU, if that feature is not given in the BIOS. For example, i have Xeon E5-2680 V2, according to the data sheet this processor supports NTB on PCIe Port3a. But this NTB option in not given in the BIOS of HP Z420 workstation. I want to know if there is a possible way to change this PPD register given at page 138 of pdf.

Thank you

user777304
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  • The data sheet you linked says that the register is RW; have you tried to write to it? – prl Jan 20 '21 at 08:50
  • @prl No I did not. I will try and update here. – user777304 Jan 21 '21 at 12:27
  • @prl So I managed to change the configuration register of PCIe. The thing is that I was not using SUDO and -H flag with setpci command. Below command did my job. sudo setpci -H 1 -s 3 4d.B=02 – user777304 Jan 26 '21 at 10:35

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Below command did the job. sudo setpci -H 1 -s 3 4d.B=02

user777304
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