Re: [PATCH V3] vm_event: Allow subscribing to write events for specific MSR-s

[Wei Liu <wei.liu2@citrix.com>]

On Fri, Apr 15, 2016 at 12:02:07PM +0300, Razvan Cojocaru wrote:
> Previously, subscribing to MSR write events was an all-or-none
> approach, with special cases for introspection MSR-s. This patch
> allows the vm_event consumer to specify exactly what MSR-s it is
> interested in, and as a side-effect gets rid of the
> vmx_introspection_force_enabled_msrs[] special case.
> This replaces the previously posted "xen: Filter out MSR write
> events" patch.
> 
> Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
> 
> ---
> Changes since V2:
>  - Bumped XEN_DOMCTL_INTERFACE_VERSION.
>  - Introduced struct monitor_msr_bitmap as recommended by Andrew
>    Cooper, which allowed removing some pointer arithmetic magic.
>  - Removed arch_ prefix from monitor functions, as recommended
>    by Tamas Lengyel.
>  - Replaced the page allocation code with xzalloc() / xfree() for
>    struct monitor_msr_bitmap.
>  - Now returning -ENXIO instead of -EINVAL from the monitor
>    functions, as recommended by Konrad Rzeszutek Wilk.
> ---
>  tools/libxc/include/xenctrl.h      |  4 +-
>  tools/libxc/xc_monitor.c           |  6 +--

Subject to an ack from hypervisor maintainer:

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

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