Re: [Xen-devel] [PATCH v3 9/9] viridian: add implementation of the HvSendSyntheticClusterIpi hypercall

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Jan 31, 2019 at 10:47:30AM +0000, Paul Durrant wrote:
> This patch adds an implementation of the hypercall as documented in the
> specification [1], section 10.5.2. This enlightenment, as with others, is
> advertised by CPUID leaf 0x40000004 and is under control of a new
> 'hcall_ipi' option in libxl.
> 
> If used, this enlightenment should mean the guest only takes a single VMEXIT
> to issue IPIs to multiple vCPUs rather than the multiple VMEXITs that would
> result from using the emulated local APIC.
> 
> [1] 
> https://github.com/MicrosoftDocs/Virtualization-Documentation/raw/live/tlfs/Hypervisor%20Top%20Level%20Functional%20Specification%20v5.0C.pdf
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> ---
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Julien Grall <julien.grall@xxxxxxx>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Tim Deegan <tim@xxxxxxx>
> Cc: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>
> ---
>  docs/man/xl.cfg.5.pod.in             |  6 +++
>  tools/libxl/libxl.h                  |  6 +++
>  tools/libxl/libxl_dom.c              |  3 ++
>  tools/libxl/libxl_types.idl          |  1 +

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

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