Re: [Xen-devel] Getting Hypercall [op = 0x0040001a ] on trace 

[Charles Gonçalves <charles.fg@xxxxxxxxx>]

Thanks for the clarification.

On Mon, Feb 19, 2018, 17:33 Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:

On Mon, Feb 19, 2018 at 05:13:11PM +0000, Wei Liu wrote:
> On Mon, Feb 19, 2018 at 04:23:33PM +0000, Charles Gonçalves wrote:
> > Hello,
> >
> > Im getting this Hypercall [op = 0x0040001a ] on xen trace  but can't figure
> > out which operation this is.
> >
> > Using old Xen 4.4.1.
> > Looking at documentation  and also using grep into source code couldn't
> > figure out which hypercall this is.
> >
> > Can someone help clarify this?
>
> See public/trace.h for the exact definition of the event.
>
> I can't seem to be able to find 0x004xxxxx in the latest upstream code
> though.

AFAICT the 0x004xxxxx comes from TRC_PV_HYPERCALL_V2_ARG_32, which is
used by __trace_hypercall, for __HYPERVISOR_mmuext_op that would be:

d.op = __HYPERVISOR_mmuext_op | (0x1 << 22);

Roger.

--

Atenciosamente, 

Charles F.'. Gonçalves

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