[edk2-devel] [PATCH 2/3] OvmfPkg: Add library to handle TPL from within nested interrupt handlers

[Ard Biesheuvel]

On Wed, 21 Dec 2022 at 09:07, Laszlo Ersek <lersek at redhat.com> wrote:
>
> On 12/20/22 16:02, Michael Brown wrote:
> > On 09/12/2022 15:22, Michael Brown wrote:
> >> On 09/12/2022 15:02, Gerd Hoffmann wrote:
> >>>> Add the Nested Interrupt TPL Library (NestedInterruptTplLib) to
> >>>> provide helper functions that can be used by nested interrupt
> >>>> handlers in place of RaiseTPL()/RestoreTPL().
> >>>
> >>> <snip>
> >>
> >>> The idea looks sane to me and I couldn't spot any logic errors in
> >>> this.
> >>
> >> Great! :)
> >
> > Ping.  Is there anything else that needs to be done before this gets
> > merged?  It would be good to have the regression bug fixed.
> >
> > Thanks,
> >
> > Michael
> >
>
> series
> Acked-by: Laszlo Ersek <lersek at redhat.com>
>
> Ard, can you please help merge this?
>

Sure.

For the ARM case, it seems the situation is slightly different, given
that we reprogram the timer for the next interrupt in
TimerInterruptHandler (), so I don't think we can accumulate pending
interrupts in the same way as x86.

So i'm fine with making this fix specific to OVMF/x86.

Queued as #3829


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