[Xen-devel] run time memory trap question

[Andrii Tseglytskyi <andrii.tseglytskyi@xxxxxxxxxxxxxxx>]

Hi,

Can anyone clarify - is it possible to make a run time memory trap in
Xen hypervisor?

To be more specific - I see the following function:
*int handle_mmio(mmio_info_t *info)*, which is called from *static
void do_trap_data_abort_guest(struct cpu_user_regs *regs, union hsr
hsr)*
Using these calls I can define memory region and create a trap for it.
But in current implementation I can do it only during compile time.
Is there any way to do similar in runtime - i.e. calculate memory
region value in code and add an entry to mmio_handlers[] ?
Is it a good idea - just to modify/extend existing code in
xen/arch/arm/io.c file to make it possible ?

regards,
Andrii

-- 

Andrii Tseglytskyi | Embedded Dev
GlobalLogic
www.globallogic.comxen/arch/arm/io.c

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