linux-kernel - Re: [PATCH -v2.1] x86/msr: Filter MSR writes

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Date:   Wed, 18 Nov 2020 10:02:57 +0100
From:   Mathieu Chouquet-Stringer <me@...hieu.digital>
To:     Matthew Garrett <mjg59@...gle.com>
Cc:     Chris Down <chris@...isdown.name>, Borislav Petkov <bp@...en8.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        sean.j.christopherson@...el.com, tony.luck@...el.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        kernel-team@...com, Len Brown <lenb@...nel.org>
Subject: Re: [PATCH -v2.1] x86/msr: Filter MSR writes

On Tue, Nov 17, 2020 at 01:22:49PM -0800, Matthew Garrett wrote:
> > MSR_IA32_ENERGY_PERF_BIAS (cc: Len Brown, who tried mightily to
> > convince me I was wrong here) on the grounds that it was exporting an
> > implementation detail rather than providing a generic interface, and
> > that it was something that could be done via userland instead. I
> > thought we'd end up with more examples of similar functionality and
> > could tie it into something more reasonable - history has proven me
> > wrong on that. I think it's probably reasonable to dust off the driver
> > that Len submitted however many years ago and push that into the
> > kernel now.
> 
> But ha ok based on Borislav's response it looks like someone's already
> done that.

Indeed, all is good. Just have to wait for it to be merged and the
proper kernel to be released...

-- 
Mathieu Chouquet-Stringer                             me@...hieu.digital
            The sun itself sees not till heaven clears.
	             -- William Shakespeare --