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From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Dylanger Daly <dylanger@thegrail.co>
Cc: xen-devel@lists.xenproject.org, Jan Beulich <jbeulich@suse.com>,
	xen-devel@lists.xen.org
Subject: Re: [PATCH] Add Undervolt MSRs to wrmsr function.
Date: Thu, 18 Apr 2019 12:12:05 +0100	[thread overview]
Message-ID: <660adf6f-a574-d1cb-44a3-871b8d076a54@citrix.com> (raw)
In-Reply-To: <CANJ4vQ1nOuFZw0kk0dWEsx4Q0h8YE2H8gRzg422cRf65FAkncg@mail.gmail.com>

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

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

WARNING: multiple messages have this Message-ID (diff)
From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Dylanger Daly <dylanger@thegrail.co>
Cc: xen-devel@lists.xenproject.org, Jan Beulich <jbeulich@suse.com>,
	xen-devel@lists.xen.org
Subject: Re: [Xen-devel] [PATCH] Add Undervolt MSRs to wrmsr function.
Date: Thu, 18 Apr 2019 12:12:05 +0100	[thread overview]
Message-ID: <660adf6f-a574-d1cb-44a3-871b8d076a54@citrix.com> (raw)
Message-ID: <20190418111205.yy8P5YVLqat3TrBvm5tAP79rxyshWtuP6RNzP63Zc5k@z> (raw)
In-Reply-To: <CANJ4vQ1nOuFZw0kk0dWEsx4Q0h8YE2H8gRzg422cRf65FAkncg@mail.gmail.com>

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

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

  reply	other threads:[~2019-04-18 11:12 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-18  8:56 [PATCH] Add Undervolt MSRs to wrmsr function Dylanger Daly
2019-04-18  8:56 ` [Xen-devel] " Dylanger Daly
2019-04-18  9:09 ` Andrew Cooper
2019-04-18  9:09   ` [Xen-devel] " Andrew Cooper
2019-04-18  9:19   ` Dylanger Daly
2019-04-18  9:19     ` [Xen-devel] " Dylanger Daly
2019-04-18 11:12     ` Andrew Cooper [this message]
2019-04-18 11:12       ` Andrew Cooper
2019-04-18 11:54       ` Dylanger Daly
2019-04-18 11:54         ` [Xen-devel] " Dylanger Daly

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