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Re: [Xen-devel] [PATCH v8 0/13] remove maintenance interrupts

2014-10-16 17:11 GMT+08:00 Ian Campbell <ian.campbell@xxxxxxxxxx>:
On Thu, 2014-10-16 at 13:25 +0800, harry S wrote:

> I see. But I want to know if Xen can intercept the software interrupt
> without setting HCR.TGE to 1, or if we don't set the HCR.TGE, Xen
> doesn't need to handle software interrupt at all.

If you mean supervisor call (i.e. the result of executing an svc
instruction) then no, Xen isn't involved in that at all, it is all
internal to the guest.

> And in ARM does the supervisor call means the software interrupt?

I suppose so.


So if I want to intercept the system call (such as ioctl), is there any way for Xen to do this without setting HCR.TGE? Or Xen can't intercept any system call at all?


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