diff options
| author | Wei Liu <wei.liu@kernel.org> | 2021-02-03 15:04:35 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-02-11 08:47:07 +0000 |
| commit | fb5ef35165a37ca63ef0227657eabd06f0a39cf9 (patch) | |
| tree | 8363346e066d3c9658f2f08da71c60be2e57b610 /arch/x86 | |
| parent | e39397d1fd6851bef4dfb63a631b8e15d1f43329 (diff) | |
| download | linux-fb5ef35165a37ca63ef0227657eabd06f0a39cf9.tar.bz2 | |
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')
| -rw-r--r-- | arch/x86/hyperv/irqdomain.c | 25 | ||||
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 4 |
2 files changed, 29 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); diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 4533773115ea..ccf60a809a17 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -265,6 +265,10 @@ static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, struct irq_domain *hv_create_pci_msi_domain(void); +int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, + struct hv_interrupt_entry *entry); +int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); + #else /* CONFIG_HYPERV */ static inline void hyperv_init(void) {} static inline void hyperv_setup_mmu_ops(void) {} |