Re: [PATCH AUTOSEL 5.14 38/99] KVM: PPC: Book3S HV: XICS: Fix mapping of passthrough interrupts

[Sasha Levin]

On Fri, Sep 10, 2021 at 07:48:18AM +0200, Cédric Le Goater wrote:
> On 9/10/21 2:14 AM, Sasha Levin wrote:
> > From: Cédric Le Goater <clg@xxxxxxxx>
> >
> > [ Upstream commit 1753081f2d445f9157550692fcc4221cd3ff0958 ]
> >
> > PCI MSIs now live in an MSI domain but the underlying calls, which
> > will EOI the interrupt in real mode, need an HW IRQ number mapped in
> > the XICS IRQ domain. Grab it there.
> >
> > Signed-off-by: Cédric Le Goater <clg@xxxxxxxx>
> > Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
> > Link: https://lore.kernel.org/r/20210701132750.1475580-31-clg@xxxxxxxx
> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
>
>
> Why are we backporting this patch in stable trees ?
>
> It should be fine but to compile, we need a partial backport of commit
> 51be9e51a800 ("KVM: PPC: Book3S HV: XIVE: Fix mapping of passthrough
> interrupts") which exports irq_get_default_host().

Or, I can drop it if it makes no sense?

--
Thanks,
Sasha