diff options
| author | Avi Kivity <avi@redhat.com> | 2008-11-19 14:58:46 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-03-24 12:03:06 +0300 |
| commit | 399ec807ddc38ecccf8c06dbde04531cbdc63e11 (patch) | |
| tree | 75a4e3ee9cfffb4ecf7b4608bb592c89f2b62219 /include/linux/kvm.h | |
| parent | 193554750441d91e127dd5066b8aebe0f769101c (diff) | |
| download | linux-399ec807ddc38ecccf8c06dbde04531cbdc63e11.tar.xz | |
KVM: Userspace controlled irq routing
Currently KVM has a static routing from GSI numbers to interrupts (namely,
0-15 are mapped 1:1 to both PIC and IOAPIC, and 16:23 are mapped 1:1 to
the IOAPIC). This is insufficient for several reasons:
- HPET requires non 1:1 mapping for the timer interrupt
- MSIs need a new method to assign interrupt numbers and dispatch them
- ACPI APIC mode needs to be able to reassign the PCI LINK interrupts to the
ioapics
This patch implements an interrupt routing table (as a linked list, but this
can be easily changed) and a userspace interface to replace the table. The
routing table is initialized according to the current hardwired mapping.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'include/linux/kvm.h')
| -rw-r--r-- | include/linux/kvm.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 73f348066866..7a5d73a8d4fa 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -399,6 +399,38 @@ struct kvm_trace_rec { #if defined(CONFIG_X86) #define KVM_CAP_REINJECT_CONTROL 24 #endif +#if defined(CONFIG_X86)||defined(CONFIG_IA64) +#define KVM_CAP_IRQ_ROUTING 25 +#endif + +#ifdef KVM_CAP_IRQ_ROUTING + +struct kvm_irq_routing_irqchip { + __u32 irqchip; + __u32 pin; +}; + +/* gsi routing entry types */ +#define KVM_IRQ_ROUTING_IRQCHIP 1 + +struct kvm_irq_routing_entry { + __u32 gsi; + __u32 type; + __u32 flags; + __u32 pad; + union { + struct kvm_irq_routing_irqchip irqchip; + __u32 pad[8]; + } u; +}; + +struct kvm_irq_routing { + __u32 nr; + __u32 flags; + struct kvm_irq_routing_entry entries[0]; +}; + +#endif /* * ioctls for VM fds @@ -430,6 +462,7 @@ struct kvm_trace_rec { _IOW(KVMIO, 0x68, struct kvm_coalesced_mmio_zone) #define KVM_ASSIGN_PCI_DEVICE _IOR(KVMIO, 0x69, \ struct kvm_assigned_pci_dev) +#define KVM_SET_GSI_ROUTING _IOW(KVMIO, 0x6a, struct kvm_irq_routing) #define KVM_ASSIGN_IRQ _IOR(KVMIO, 0x70, \ struct kvm_assigned_irq) #define KVM_REINJECT_CONTROL _IO(KVMIO, 0x71) |