Re: [Xen-devel] [PATCH v3] vm_event: Implement ARM SMC events

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 09/15/16 21:24, Tamas K Lengyel wrote:
> The ARM SMC instructions are already configured to trap to Xen by default. In
> this patch we allow a user-space process in a privileged domain to receive
> notification of when such event happens through the vm_event subsystem by
> introducing the PRIVILEGED_CALL type.
> 
> The intended use-case for this feature is for a monitor application to be able
> insert tap-points into the domU kernel-code. For this task only unconditional
> SMC instruction should be used.
> 
> Signed-off-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
> Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> ---
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Julien Grall <julien.grall@xxxxxxx>

Acked-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>


Thanks,
Razvan

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