Re: [Xen-devel] What's the function of evtchn

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2012-02-13 at 09:19 +0000, ææå wrote:
> Hi all,
> I'm reading some code of Xen-4.0-unstable and I occurred some obstacle
> when reading xen-unstable\unmodified_drivers\linux-2.6\platform-pci
> \evtchn.c. I don't exactly know what evtchn is, so I can't understand
> some of the code. I search evtchn in google but get few information.

Try searching for "event channel" for which evtchn is the abbreviation.
Event channels are the Xen PV IRQ mechanism.

The particular file you have found is part of the infrastructure for PV
drivers running in fully virtualised guests.

Ian.




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