[Xen-devel] how xen inject a virtual irq to a domain when a msg is available for this domain?

[Xin Zhao <zhaoxin@xxxxxxxxxxxxxx>]

Hi,

Can somebody explain how xen insert a virtual irq to a domU/dom0?  I am
looking at the codes of block driver and do see that a frontend block
driver request a irq and bind it to a event channel. The driver can then
define the interrupt handler for this irq. But I don't know where I can
find the code of xen injecting irq. Can someone help me out?

Another question, in xu.c, function map_control_interface return
(control_if_t *)(vaddr+2048), what that means? why 2048? I cannot find the
related document. :(

Thanks in advance for kind helps.

Xin


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