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KVM: s390: irq routing for adapter interrupts.

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Introduce a new interrupt class for s390 adapter interrupts and enable
irqfds for s390.

This is depending on a new s390 specific vm capability, KVM_CAP_S390_IRQCHIP,
that needs to be enabled by userspace.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck
2013-07-15 13:36:01 +02:00
parent 841b91c584
commit 8422359877
9 changed files with 209 additions and 5 deletions
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21
Documentation/virtual/kvm/api.txt
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@@ -586,8 +586,8 @@ struct kvm_fpu {
4.24 KVM_CREATE_IRQCHIP
Capability: KVM_CAP_IRQCHIP
Architectures: x86, ia64, ARM, arm64
Capability: KVM_CAP_IRQCHIP, KVM_CAP_S390_IRQCHIP (s390)
Architectures: x86, ia64, ARM, arm64, s390
Type: vm ioctl
Parameters: none
Returns: 0 on success, -1 on error
@@ -596,7 +596,10 @@ Creates an interrupt controller model in the kernel. On x86, creates a virtual
ioapic, a virtual PIC (two PICs, nested), and sets up future vcpus to have a
local APIC. IRQ routing for GSIs 0-15 is set to both PIC and IOAPIC; GSI 16-23
only go to the IOAPIC. On ia64, a IOSAPIC is created. On ARM/arm64, a GIC is
created.
created. On s390, a dummy irq routing table is created.
Note that on s390 the KVM_CAP_S390_IRQCHIP vm capability needs to be enabled
before KVM_CREATE_IRQCHIP can be used.
4.25 KVM_IRQ_LINE
@@ -1336,7 +1339,7 @@ KVM_ASSIGN_DEV_IRQ. Partial deassignment of host or guest IRQ is allowed.
4.52 KVM_SET_GSI_ROUTING
Capability: KVM_CAP_IRQ_ROUTING
Architectures: x86 ia64
Architectures: x86 ia64 s390
Type: vm ioctl
Parameters: struct kvm_irq_routing (in)
Returns: 0 on success, -1 on error
@@ -1359,6 +1362,7 @@ struct kvm_irq_routing_entry {
union {
struct kvm_irq_routing_irqchip irqchip;
struct kvm_irq_routing_msi msi;
struct kvm_irq_routing_s390_adapter adapter;
__u32 pad[8];
} u;
};
@@ -1366,6 +1370,7 @@ struct kvm_irq_routing_entry {
/* gsi routing entry types */
#define KVM_IRQ_ROUTING_IRQCHIP 1
#define KVM_IRQ_ROUTING_MSI 2
#define KVM_IRQ_ROUTING_S390_ADAPTER 3
No flags are specified so far, the corresponding field must be set to zero.
@@ -1381,6 +1386,14 @@ struct kvm_irq_routing_msi {
__u32 pad;
};
struct kvm_irq_routing_s390_adapter {
__u64 ind_addr;
__u64 summary_addr;
__u64 ind_offset;
__u32 summary_offset;
__u32 adapter_id;
};
4.53 KVM_ASSIGN_SET_MSIX_NR