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

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


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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