Loading Documentation/virtual/kvm/api.txt +25 −0 Original line number Diff line number Diff line Loading @@ -1466,6 +1466,31 @@ is supported; 2 if the processor requires all virtual machines to have an RMA, or 1 if the processor can use an RMA but doesn't require it, because it supports the Virtual RMA (VRMA) facility. 4.64 KVM_NMI Capability: KVM_CAP_USER_NMI Architectures: x86 Type: vcpu ioctl Parameters: none Returns: 0 on success, -1 on error Queues an NMI on the thread's vcpu. Note this is well defined only when KVM_CREATE_IRQCHIP has not been called, since this is an interface between the virtual cpu core and virtual local APIC. After KVM_CREATE_IRQCHIP has been called, this interface is completely emulated within the kernel. To use this to emulate the LINT1 input with KVM_CREATE_IRQCHIP, use the following algorithm: - pause the vpcu - read the local APIC's state (KVM_GET_LAPIC) - check whether changing LINT1 will queue an NMI (see the LVT entry for LINT1) - if so, issue KVM_NMI - resume the vcpu Some guests configure the LINT1 NMI input to cause a panic, aiding in debugging. 5. The kvm_run structure Application code obtains a pointer to the kvm_run structure by Loading Loading
Documentation/virtual/kvm/api.txt +25 −0 Original line number Diff line number Diff line Loading @@ -1466,6 +1466,31 @@ is supported; 2 if the processor requires all virtual machines to have an RMA, or 1 if the processor can use an RMA but doesn't require it, because it supports the Virtual RMA (VRMA) facility. 4.64 KVM_NMI Capability: KVM_CAP_USER_NMI Architectures: x86 Type: vcpu ioctl Parameters: none Returns: 0 on success, -1 on error Queues an NMI on the thread's vcpu. Note this is well defined only when KVM_CREATE_IRQCHIP has not been called, since this is an interface between the virtual cpu core and virtual local APIC. After KVM_CREATE_IRQCHIP has been called, this interface is completely emulated within the kernel. To use this to emulate the LINT1 input with KVM_CREATE_IRQCHIP, use the following algorithm: - pause the vpcu - read the local APIC's state (KVM_GET_LAPIC) - check whether changing LINT1 will queue an NMI (see the LVT entry for LINT1) - if so, issue KVM_NMI - resume the vcpu Some guests configure the LINT1 NMI input to cause a panic, aiding in debugging. 5. The kvm_run structure Application code obtains a pointer to the kvm_run structure by Loading
Avi Kivity <avi@redhat.com>Avi Kivity <avi@redhat.com>