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authorWei Liu <wei.liu@kernel.org>2021-02-03 15:04:35 +0000
committerWei Liu <wei.liu@kernel.org>2021-02-11 08:47:07 +0000
commitfb5ef35165a37ca63ef0227657eabd06f0a39cf9 (patch)
tree8363346e066d3c9658f2f08da71c60be2e57b610 /arch/x86/hyperv
parente39397d1fd6851bef4dfb63a631b8e15d1f43329 (diff)
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iommu/hyperv: setup an IO-APIC IRQ remapping domain for root partition
Just like MSI/MSI-X, IO-APIC interrupts are remapped by Microsoft Hypervisor when Linux runs as the root partition. Implement an IRQ domain to handle mapping and unmapping of IO-APIC interrupts. Signed-off-by: Wei Liu <wei.liu@kernel.org> Acked-by: Joerg Roedel <joro@8bytes.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-17-wei.liu@kernel.org
Diffstat (limited to 'arch/x86/hyperv')
-rw-r--r--arch/x86/hyperv/irqdomain.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/hyperv/irqdomain.c b/arch/x86/hyperv/irqdomain.c
index bddcf1d6860d..4421a8d92e23 100644
--- a/arch/x86/hyperv/irqdomain.c
+++ b/arch/x86/hyperv/irqdomain.c
@@ -358,3 +358,28 @@ struct irq_domain * __init hv_create_pci_msi_domain(void)
}
#endif /* CONFIG_PCI_MSI */
+
+int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry)
+{
+ union hv_device_id device_id;
+
+ device_id.as_uint64 = 0;
+ device_id.device_type = HV_DEVICE_TYPE_IOAPIC;
+ device_id.ioapic.ioapic_id = (u8)ioapic_id;
+
+ return hv_unmap_interrupt(device_id.as_uint64, entry);
+}
+EXPORT_SYMBOL_GPL(hv_unmap_ioapic_interrupt);
+
+int hv_map_ioapic_interrupt(int ioapic_id, bool level, int cpu, int vector,
+ struct hv_interrupt_entry *entry)
+{
+ union hv_device_id device_id;
+
+ device_id.as_uint64 = 0;
+ device_id.device_type = HV_DEVICE_TYPE_IOAPIC;
+ device_id.ioapic.ioapic_id = (u8)ioapic_id;
+
+ return hv_map_interrupt(device_id, level, cpu, vector, entry);
+}
+EXPORT_SYMBOL_GPL(hv_map_ioapic_interrupt);