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Re: Howto read MSR thermal under XEN-4.15.0

(+ Andrew and Jan)


On 16/06/2021 23:39, Bobbi Sanchez wrote:

how can i read the MSR Thermal Values under XEN-4.15.0 ?

Usually without having XEN-4.15.0 installed i can read the MSR Thermal Values like this:

rdmsr -p 0 -d -f22:16 0x19c

this works for my Core2Quod Q6600.

But after having xen-4.15.0 installed and booted, same command shows now: 0

I believe the access was restricted as part of XSA-351 [1]. I am not sure if there are a safe generic way to access them. I will let Andrew and Jan commenting.

[1] https://xenbits.xen.org/xsa/advisory-351.html

Best Regards

B. S.

Julien Grall



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