RE: [PATCH v6 18/19] x86: Add support for generic vDSO

Thomas Gleixner
2019-06-24T03:01:38Z

On Mon, 24 Jun 2019, Michael Kelley wrote:
> From: Thomas Gleixner <tglx@linutronix.de> Sent: Sunday, June 23, 2019 3:13 PM
> >
> > I have no objections if you collect hyper-v stuff, quite the contrary, but
> > changes which touch other subsystems need to be coordinated upfront. That's
> > all I'm asking for.
> >
> > Btw, that clocksource stuff looks good code wise, just the change logs need
> > some care and after the VDSO stuff hits next we need to sort out the
> > logistics. I hope these changes are completely self contained. If not we'll
> > find a solution.
> >
>
> In my view, the only thing that potentially needs a solution is where the
> Hyper-V clock code used by VDSO ends up in the code tree. I think the
> right long term place is include/clocksource/hyperv_timer.h. That location
> is architecture neutral, and the same Hyper-V clock code will be shared by
> the Hyper-V on ARM64 support that's in process.
>
> Vincenzo's patch set creates a new file arch/x86/include/asm/mshyperv-tsc.h,
> which I will want to move when creating the separate Hyper-V clocksource
> driver. If you're OK with that file existing for a release and then going away,
> that's fine. Alternatively, put the code in include/clocksource/hyperv_timer.h
> now as part of the VDSO patch set so it's in the right place from the start. My
> subsequent patch set will add a few additional tweaks to remove x86-isms
> and fully integrate with the separate Hyper-V clocksource driver.

I don't care whether this goes into 5.3 or later. If you can provide me
rebased self contained patches on top of

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/vdso

I'm happy to pull them in on top.

Thanks,

tglx