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Re: rfc: a driver to access MSRs on i386

To: tech-kern%netbsd.org@localhost
Subject: Re: rfc: a driver to access MSRs on i386
From: Joerg Sonnenberger <joerg%britannica.bec.de@localhost>
Date: Sun, 24 Jan 2010 20:29:41 +0100

On Sun, Jan 24, 2010 at 01:13:10PM -0600, David Young wrote:
> Can you do without an ioctl for invoking rdmsr/wrmsr if you trap the
> instructions and simulate them in the kernel?

That is IMO a very bad idea, especially for wrmsr. This instructions
require proper access control and doing that in the fault handler sounds
like a very stupid idea.

Joerg

Follow-Ups:
- Re: rfc: a driver to access MSRs on i386
  - From: Mindaugas Rasiukevicius

References:
- rfc: a driver to access MSRs on i386
  - From: Marc Balmer
- Re: rfc: a driver to access MSRs on i386
  - From: David Young

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