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xen-devel
RE: [Xen-devel] Dynamic-irq's in HVM domains
I can't help with the Windows side I'm afraid, perhaps there is a
windows dev newsgroup or something that might be useful?
On Fri, 2007-11-30 at 20:02 +1100, James Harper wrote:
> I made the assumption that 'Dynamic-irq' is the same as virq... if
> not, what is a virq? It appears to be something that the hypervisor is
> aware of as there is a hypercall to bind to one.
They are IRQ sources from the hypervisor (as opposed to from a virtual
or physical device or another domain). From xen/include/public/xen.h:
#define VIRQ_TIMER 0 /* V. Timebase update, and/or requested
timeout. */
#define VIRQ_DEBUG 1 /* V. Request guest to dump debug info.
*/
#define VIRQ_CONSOLE 2 /* G. (DOM0) Bytes received on emergency
console. */
#define VIRQ_DOM_EXC 3 /* G. (DOM0) Exceptional event for some
domain. */
#define VIRQ_TBUF 4 /* G. (DOM0) Trace buffer has records
available. */
#define VIRQ_DEBUGGER 6 /* G. (DOM0) A domain has paused for
debugging. */
#define VIRQ_XENOPROF 7 /* V. XenOprofile interrupt: new sample
available */
#define VIRQ_CON_RING 8 /* G. (DOM0) Bytes received on console
*/
plus a handful of VIRQ_ARCH<n>
They are used by binding them to an event channel using
EVTCHNOP_bind_virq, as you've probably noticed.
Ian.
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