Re: [PATCH v2 00/15] xen: drop hypercall function tables

[Michal Orzel <michal.orzel@xxxxxxx>]

Hi Juergen,

On 01.11.2021 16:20, Juergen Gross wrote:
> In order to avoid indirect function calls on the hypercall path as
> much as possible this series is removing the hypercall function tables
> and is replacing the hypercall handler calls via the function array
> by automatically generated call macros.
> 
> Another by-product of generating the call macros is the automatic
> generating of the hypercall handler prototypes from the same data base
> which is used to generate the macros.
> 
> This has the additional advantage of using type safe calls of the
> handlers and to ensure related handler (e.g. PV and HVM ones) share
> the same prototypes.
> 
> A very brief performance test (parallel build of the Xen hypervisor
> in a 6 vcpu guest) showed a very slim improvement (less than 1%) of
> the performance with the patches applied. The test was performed using
> a PV and a PVH guest.
> 
> Changes in V2:
> - new patches 6, 14, 15
> - patch 7: support hypercall priorities for faster code
> - comments addressed

For the ARM part:
Apart from the issue I found and reported in patch 7/15, the build was 
successful.
I tested the following basics also successfully:
-booting a dom0
-booting domUs
-networking between guest and dom0 using NAT
-stressing hypercall xen_version

so,

Tested-by: Michal Orzel <michal.orzel@xxxxxxx>

Cheers,
Michal