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Re: [Xen-devel] [PATCH] Add Undervolt MSRs to wrmsr function.
- To: Dylanger Daly <dylanger@xxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 18 Apr 2019 12:12:05 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Jan Beulich <jbeulich@xxxxxxxx>, xen-devel@xxxxxxxxxxxxx
- Delivery-date: Thu, 18 Apr 2019 11:12:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 18/04/2019 10:19, Dylanger Daly wrote:
> No worries Andrew, it was my first patch, thank you for the response.
>
> It's based on Xen 4.8
>
> Dom0 should be controlling it, but I wasn't aware of the Security
> implications.
>
> The scope isn't well documented:
> https://ressman.org/posts/2018-06-26-voltage-temperature-tdp-thinkpad/
>
> More experimental as it worked with my Laptop.
Which CPU exactly?
MSR_TEMPERATURE_TARGET is documented. It has package scope, but the
availability of certain fields is model specific (but consistent, at least).
I can't find any documentation on MSR 150 at all.
~Andrew
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