Re: [Xen-devel] [PATCH v7 2/3] x86/vm_event: Add HVM debug exception vm_events

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Mon, Jun 27, 2016 at 12:08:06PM -0600, Tamas K Lengyel wrote:
> Since in-guest debug exceptions are now unconditionally trapped to Xen, adding
> a hook for vm_event subscribers to tap into this new always-on guest event. We
> rename along the way hvm_event_breakpoint_type to hvm_event_type to better
> match the various events that can be passed with it. We also introduce the
> necessary monitor_op domctl's to enable subscribing to the events.
> 
> This patch also provides monitor subscribers to int3 events proper access
> to the instruction length necessary for accurate event-reinjection. Without
> this subscribers manually have to evaluate if the int3 instruction has any
> prefix attached which would change the instruction length.
> 
> Signed-off-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
> ---
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Jun Nakajima <jun.nakajima@xxxxxxxxx>
> Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
> 
> v7: Add rc < 0 clause for crash case in vmx and cosmetic fixes
> ---
>  tools/libxc/include/xenctrl.h       |  3 +-
>  tools/libxc/xc_monitor.c            | 25 +++++++++++++++
>  tools/tests/xen-access/xen-access.c | 61 
> ++++++++++++++++++++++++++++++++-----

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

FAOD I expect HV side committer to take care of this patch.

Wei.

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