iommu/hyper-v: Disable IRQ pseudo-remapping if 15 bit APIC IDs are available

If the 15-bit APIC ID support is present in emulated MSI then there's no
need for the pseudo-remapping support.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>

diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index e09e2d734c5780ed56bfc0328f282aa72631922b..12ec315349958c64e2aaa539c1b170e2666a0589 100644 (file)
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -143,6 +143,7 @@ static int __init hyperv_prepare_irq_remapping(void)
        int i;
 
        if (!hypervisor_is_type(X86_HYPER_MS_HYPERV) ||
+           x86_init.hyper.msi_ext_dest_id() ||
            !x2apic_supported())
                return -ENODEV;