Bug#970699: linux: Enable amd_energy driver

From	David Schiller <david.schiller@gmx.at>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#970699: linux: Enable amd_energy driver
Date	2020-11-17 21:40 +0100
Message-ID	<BcfVE-4xf-11@gated-at.bofh.it> (permalink)
References	<ARCtP-1N7-3@gated-at.bofh.it> <BaHMl-5EY-1@gated-at.bofh.it> <ARCtP-1N7-3@gated-at.bofh.it> <BaHMl-5EY-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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On Fri, 2020-11-13 at 14:56 +0100, Salvatore Bonaccorso wrote:
> If we are going to enable this for our builds, then we might need to
> check that https://bugzilla.redhat.com/show_bug.cgi?id=1897402 is not
> opened accordingly.
> 
> This relates to
> 
> https://support.lenovo.com/lu/uk/product_security/LEN-50481
> 
> and probably the reason for
> 
> https://lore.kernel.org/stable/238e3cf7-582f-a265-5300-9b44948107b0@roeck-us.net/T/#m11dee15be8c238d8858aafdf1a57e9ad7e0b9670

Thanks for the response!

I skimmed through the paper covering the CVE and they mostly focused on Intel
SGX and only touched upon AMD briefly. They did there measurements with disabled
boost and fixed frequency, a configuration that no system in the wild actually
uses. Moreover the energy counters are exposed as an MSR, so in my opinion this
is more of a CPU-level bug. 

Personally I feel like recent security efforts are often crippling usability for
negligible gains.

Just my two cents!

Thread

Bug#970699: linux: Enable amd_energy driver David Schiller <david.schiller@gmx.at> - 2020-09-22 00:30 +0200
  Bug#970699: linux: Enable amd_energy driver Salvatore Bonaccorso <carnil@debian.org> - 2020-11-13 15:00 +0100
    Bug#970699: linux: Enable amd_energy driver David Schiller <david.schiller@gmx.at> - 2020-11-17 21:40 +0100
  Bug#970699: marked as done (linux: Enable amd_energy driver) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-01-21 15:20 +0100

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