On Tue, Jul 21, 2009 at 08:57:26AM -0700, Saksena, Abhishek wrote:
>
>
>
> Hi,
> I am building some device models around the KVM and am intersted in injecting
> IRQs.
>
> The current LibKVM.h provides following function
>
> int kvm_inject_irq (
> kvm_context_t<file:///C:/Documents%20and%20Settings/asaksena/Desktop/march_onwards/kvmsocket/doc/htmlkvm/structkvm__context.html>
> kvm,
> int vcpu,
> unsigned irq
> )
>
> Simulate an external vectored interrupt.
>
> This allows you to simulate an external vectored interrupt.
>
> Parameters:
> kvm Pointer to the current
> kvm_context<file:///C:/Documents%20and%20Settings/asaksena/Desktop/march_onwards/kvmsocket/doc/htmlkvm/structkvm__context.html>
> vcpu Which virtual CPU should get dumped
> irq Vector number
>
> Returns:
> 0 on success
>
> My question is if I am say Injecting IRQ on pin 0 on PIC how do I get
> croosponding vector? I am using KVM's interrupt controllers.
>
This ioctl should be used if userspace emulates HW that maps IRQ to
interrupt vector (PIC/IOAPIC/LAPIC).
>
>
> I also see another function
>
>
>
> int kvm_set_irq_level (
> kvm_context_t<file:///C:/Documents%20and%20Settings/asaksena/Desktop/march_onwards/kvmsocket/doc/htmlkvm/structkvm__context.html>
> kvm, int irq, int level )
>
>
>
> Can this be used safely to inject IRQ- I am gusseing irq refers to the pin
> and Level the value of that pin. How do I tell with this function which CPU I
> want to inject interrupt?
>
>
And this one should be used if PIC/IOAPIC/LAPIC are emulated by
a kernel.
--
Gleb.
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