Hi all, i have been doing the KVM stuff and have a couple of questions that can not figure out. 1> as we know, normally the external interrupt will cause VMexit and the hypervisor will inject a virtual interrupt if it is for guest. Then which irq will be injected (i mean the interrupt vector for indexing the guest IDT)? How does the KVM get to know about this (associate a host IRQ with a guest virtual IRQ)? 2> if for assigned device to the guest, the hypervisor will deliver that IRQ to the guest. by tracing the code, i found the host IRQ is different with the guest's (i mean the interrupt vector). how the KVM configure which interrupt vector the guest should use? 3> if we configure not exit on external interrupt by setting some field in VMCS, what will happen during the physical interrupts? will the CPU use the guest IDT for response interrupt? If so, can KVM redirect the CPU to use another IDT for guest (assuming modifying the IDTR)? 4> where is the guest IDT located? it this configured by the qemu while initializing the vcpu and registers (include the IDTR)? I really hope someone can reply to my questions. I will be very appreciated. Thanks -- Sheng Qiu Texas A & M University Room 332B Wisenbaker email: herbert1984106@xxxxxxxxx College Station, TX 77843-3259 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
