On Fri, 20 Oct 2017, Bjorn Helgaas wrote:
> On Tue, Oct 17, 2017 at 09:54:56AM +0200, Thomas Gleixner wrote:
> > Dexuan reported that the recent rework of the vector allocation mode in x86
> > broke HyperV PCI passtrough because the rework missed to add the
> > MSI_FLAG_MUST_REACTIVATE flag to the HyperV/PCI interrupt domain info.
> >
> > The simple solution would be to set the flag in the HyperV/PCI driver but
> > it's better to make this generic and let the PCI/MSI core code set the flag
> > when reservation mode is enabled. That ensures that future users of this
> > wont trip over the same problem.
> >
> > Thanks,
> >
> > tglx
> >
> > ---
> > arch/x86/Kconfig | 2 +-
> > arch/x86/kernel/apic/msi.c | 5 ++---
> > drivers/pci/msi.c | 2 ++
> > kernel/irq/Kconfig | 3 +++
> > 4 files changed, 8 insertions(+), 4 deletions(-)
>
> This mentions 4900be83602b ("x86/vector/msi: Switch to global reservation
> mode"), which I don't have, so I assume it's an x86 thing. So I guess
> you'll probably merge this via the same tree?
Yes, it's in tip/x86/apic branch and the fixups are applied there now as well.
Thanks,
tglx
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