linux-kernel - Re: RE: Re: "oneshot" interrupt causes another interrupt to be fired erroneously in Haswell system

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Message-ID: <8736bjlqkg.fsf@nanos.tec.linutronix.de>
Date:   Sun, 09 Feb 2020 16:37:35 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     sean.v.kelley@...ux.intel.com, Kar Hin Ong <kar.hin.ong@...com>,
        Bjorn Helgaas <helgaas@...nel.org>
Cc:     linux-rt-users <linux-rt-users@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "x86\@kernel.org" <x86@...nel.org>,
        "linux-pci\@vger.kernel.org" <linux-pci@...r.kernel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Julia Cartwright <julia.cartwright@...com>,
        Keng Soon Cheah <keng.soon.cheah@...com>,
        Gratian Crisan <gratian.crisan@...com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: RE: Re: "oneshot" interrupt causes another interrupt to be fired erroneously in Haswell system

Sean,

Thomas Gleixner <tglx@...utronix.de> writes:
> Sean V Kelley <sean.v.kelley@...ux.intel.com> writes:
>> So I will ensure we actually create useful information pointing to this
>> behavior either in kernel docs or online as in a white paper or both.
>
> Great.
>
>>> As we have already quirks in drivers/pci/quirks.c which handle the
>>> same issue on older chipsets, we really should add one for these kind
>>> of systems to avoid fiddling with the BIOS (which you can, but most
>>> people cannot).
>
>> Agreed, and I will follow-up with Kar Hin Ong to get them added.
>
> Much appreciated.

Any update on this?

Thanks,

        tglx