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(-)
