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Re: [Xen-devel] set_fast_trap() in xenlinux

  • To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>
  • From: "pallavi jk" <pallutai@xxxxxxxxx>
  • Date: Thu, 9 Oct 2008 18:32:00 +0530
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 09 Oct 2008 06:02:24 -0700
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Thanx a lot for the answer.
I am trying to use xen for a system where I need the control to be transferred to xen i.e. I need to perform some checks in xen before transferring control to the guest.

Can you please tell me how this can be done??...I think I need to disable fast handlers...How can I do this?...or should I switch to an older version of xen?

On Thu, Oct 9, 2008 at 5:14 PM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
Normal trap handlers registered on vector 0x80 are automatically 'faster'. set_fast_trap() disappeared ages ago.

 -- Keir

On 9/10/08 12:05, "pallavi jk" <pallutai@xxxxxxxxx> wrote:

Can anyone please tell me whether HYPERVISOR_set_fast_trap() is used in linux-2.6.18.hg which runs as dom0 on xen?
I searched through the code but could not find it there...
Are fast handlers used as default?...

Also, I found "fastcall" written in the prototype of many functions...does it have any relation with fastcalls??

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