diff mbox series

[v3,33/35] iommu/hyper-v: Disable IRQ pseudo-remapping if 15 bit APIC IDs are available

Message ID 20201024213535.443185-34-dwmw2@infradead.org (mailing list archive)
State New, archived
Headers show
Series Fix x2apic enablement and allow more CPUs, clean up I/OAPIC and MSI bitfields | expand

Commit Message

David Woodhouse Oct. 24, 2020, 9:35 p.m. UTC 
From: David Woodhouse <dwmw@amazon.co.uk>

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>
---
 drivers/iommu/hyperv-iommu.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index a629a6be65c7..9438daa24fdb 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -121,6 +121,7 @@  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;