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Diffstat (limited to 'Documentation/kvm')
| -rw-r--r-- | Documentation/kvm/api.txt | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt index 1b1c22da211..5a4bc8cf6d0 100644 --- a/Documentation/kvm/api.txt +++ b/Documentation/kvm/api.txt @@ -517,6 +517,82 @@ struct kvm_fpu { __u32 pad2; }; +4.23 KVM_CREATE_IRQCHIP + +Capability: KVM_CAP_IRQCHIP +Architectures: x86, ia64 +Type: vm ioctl +Parameters: none +Returns: 0 on success, -1 on error + +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. + +4.24 KVM_IRQ_LINE + +Capability: KVM_CAP_IRQCHIP +Architectures: x86, ia64 +Type: vm ioctl +Parameters: struct kvm_irq_level +Returns: 0 on success, -1 on error + +Sets the level of a GSI input to the interrupt controller model in the kernel. +Requires that an interrupt controller model has been previously created with +KVM_CREATE_IRQCHIP. Note that edge-triggered interrupts require the level +to be set to 1 and then back to 0. + +struct kvm_irq_level { + union { + __u32 irq; /* GSI */ + __s32 status; /* not used for KVM_IRQ_LEVEL */ + }; + __u32 level; /* 0 or 1 */ +}; + +4.25 KVM_GET_IRQCHIP + +Capability: KVM_CAP_IRQCHIP +Architectures: x86, ia64 +Type: vm ioctl +Parameters: struct kvm_irqchip (in/out) +Returns: 0 on success, -1 on error + +Reads the state of a kernel interrupt controller created with +KVM_CREATE_IRQCHIP into a buffer provided by the caller. + +struct kvm_irqchip { + __u32 chip_id; /* 0 = PIC1, 1 = PIC2, 2 = IOAPIC */ + __u32 pad; + union { + char dummy[512]; /* reserving space */ + struct kvm_pic_state pic; + struct kvm_ioapic_state ioapic; + } chip; +}; + +4.26 KVM_SET_IRQCHIP + +Capability: KVM_CAP_IRQCHIP +Architectures: x86, ia64 +Type: vm ioctl +Parameters: struct kvm_irqchip (in) +Returns: 0 on success, -1 on error + +Sets the state of a kernel interrupt controller created with +KVM_CREATE_IRQCHIP from a buffer provided by the caller. + +struct kvm_irqchip { + __u32 chip_id; /* 0 = PIC1, 1 = PIC2, 2 = IOAPIC */ + __u32 pad; + union { + char dummy[512]; /* reserving space */ + struct kvm_pic_state pic; + struct kvm_ioapic_state ioapic; + } chip; +}; + 5. The kvm_run structure Application code obtains a pointer to the kvm_run structure by |