Re: [Xen-devel] Interrupt handler for '__HYPERVISOR_event_channel_op'?

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

HYPERVISOR_event_channel_op() wraps a hypercall into Xen.
The table of hypercall handlers is at the end of xen/arch/x86/entry.S
-- there you will see that entry 21 is function do_event_channel_op.

 -- Keir

> Hi, all
> 
> I am interested in how the guest OS's network works.
> For example, in the receiving side, when 'HYPERVISOR_event_channel_op()'
> is called in /include/asm-xen/hypervisor.h,
>       __asm__ __volatile__(
>         TRAP_INSTR
>         : "=a" (ret) : "0" (__HYPERVISOR_event_channel_op),
>         "b" (op) : "memory"
>       );
> 
> What is the corresponding interrupt handler for
> __HYPERVISOR_event_channel_op (21)? I searched, but with no result.
> 
> Thanks.
> Xiaofang
> 
> 
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