If x2apic is not available, hyperv-iommu skips remapping
irqs. This breaks root partition which always needs irqs
remapped.
Fix this by allowing irq remapping regardless of x2apic,
and change hyperv_enable_irq_remapping() to return
IRQ_REMAP_XAPIC_MODE in case x2apic is missing.
Tested with root and non-root hyperv partitions.
Signed-off-by: Nuno Das Neves<nunodasneves@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/mshyperv.c | 6 ++++++
drivers/iommu/Kconfig | 6 +++---
drivers/iommu/hyperv-iommu.c | 11 ++++++++---
3 files changed, 17 insertions(+), 6 deletions(-)