Re: [Xen-devel] xentrace, arm, hvm

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 04/02/14 12:39, Pavlo Suikov wrote:
> Well,
Hello,

Ian/Stefano may have a better answer than me on this part :).

>  > To support xentrace on ARM, we will need at least:
>
> I would readily do that if you give me some directions on where to look
> at, or a high-level explanation of:
>
>  > - to replace rcu_lock_domain_by_any_id() by a a similar function
>
> What semantics should this function have?
I would copy in part get_pg_owner (arch/x86/mm/mm.c) in the ARM code. 
The check "unlikely(paging_mode_translate(curr))" will always fail on ARM.
>  > - to add stubs for trace in arm code
>
> Is there an example of what functionality should be stubbed in arm code?
You can look at __trace_hypercall_entry on x86, and x86/entry.S where 
the function is called.
Sincerely yours,


--
Julien Grall

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