linux-kernel - Re: No 8254 PIT & no HPET on new Intel N3350 platforms causes kernel panic during early boot

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Date:   Fri, 28 Jun 2019 07:07:40 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Daniel Drake <drake@...lessm.com>
cc:     Linux Kernel <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Hans de Goede <hdegoede@...hat.com>,
        david.e.box@...ux.intel.com,
        Linux Upstreaming Team <linux@...lessm.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>, x86@...nel.org
Subject: Re: No 8254 PIT & no HPET on new Intel N3350 platforms causes kernel
 panic during early boot

On Fri, 28 Jun 2019, Daniel Drake wrote:
> On Thu, Jun 27, 2019 at 10:07 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> > Nah. That extra timer works thing is just another bandaid.
> >
> > What I had in mind is something like the below. That's on top of
> >
> >    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/apic
> >
> > Be warned. It's neither compiled nor tested, so keep a fire extinguisher
> > handy. If it explodes you own the pieces.
> 
> Thanks, it works, and makes sense!
> 
> I'll add a commit message and send it as a patch, just one quick
> function naming question... did you mean apic_and_tsc_needs_pit() or
> apic_needs_pit()? That's the only compile fix needed.

I'd say apic_needs_pit(). Less places to change :)

Thanks,

	tglx