>>> On 08.05.15 at 11:07, wrote:
> --- a/xen/drivers/passthrough/vtd/iommu.c
> +++ b/xen/drivers/passthrough/vtd/iommu.c
> @@ -2044,6 +2044,7 @@ static int init_vtd_hw(void)
> if ( ioapic_to_iommu(IO_APIC_ID(apic)) == NULL )
> {
> iommu_intremap = 0;
> +
VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
intervention when guest is running in non-root mode.
This patch adds feature detection logic for VT-d
