Re: [Xen-devel] [PATCH for-next RFC 0/8] Port Xen to Hyper-V

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Xen-devel <xen-devel-bounces@xxxxxxxxxxxxxxxxxxxx> On Behalf Of Wei Liu
> Sent: 23 September 2019 11:09
> To: Xen Development List <xen-devel@xxxxxxxxxxxxxxxxxxxx>
> Cc: Wei Liu <liuwe@xxxxxxxxxxxxx>; Wei Liu <wl@xxxxxxx>; Andrew Cooper 
> <Andrew.Cooper3@xxxxxxxxxx>;
> Michael Kelley <mikelley@xxxxxxxxxxxxx>; Jan Beulich <jbeulich@xxxxxxxx>; 
> Roger Pau Monne
> <roger.pau@xxxxxxxxxx>
> Subject: [Xen-devel] [PATCH for-next RFC 0/8] Port Xen to Hyper-V
> 
> Hi all
> 
> In case you're wondering, I can already run a fully fledged Xen system on
> Hyper-V with emulated disk and network.
> 
> This is the very first stage for porting Xen to run on Hyper-V with all the
> goodies Hyper-V has to offer.  With this series, Xen can successfully detect
> Hyper-V and prints out a message.  I would like to first get the directory
> structure and kconfig options agreed upon.
> 
> There are two major areas to be worked on:
>   * Make Dom0 able to use Hyper-V's synthetic devices.
>   * Make Xen use of the synthetic timer, reference TSC and enlightenment VMCS
>     and other interfaces.
> 
> They aren't trivial, and time can be scarce on my side, so I intend to post
> patches piece meal when they are ready.
> 
> Questions and comments are welcome.

Yay! Glad you found the time to do this :-) Making use of the synic, stimer, 
will be useful. To get the benefit for nested guests though, I assume we'll 
need to exposed enlightened VMCS, EPT flush, etc. through?

  Cheers,

    Paul

> 
> Thanks,
> Wei.
> 
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Wei Liu <wl@xxxxxxx>
> Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> 
> Wei Liu (8):
>   x86: introduce CONFIG_GUEST and move code
>   x86: include asm_defns.h directly in hypercall.h
>   x86: drop hypervisor_cpuid_base
>   x86: factor out xen variants for hypervisor setup code
>   x86: factor out hypervisor agnostic code
>   x86: make probe_xen return boolean value
>   x86: introduce CONFIG_HYPERV and hyperv directory
>   x86: be more verbose when running nested
> 
>  xen/arch/x86/Kconfig                          |  13 ++
>  xen/arch/x86/Makefile                         |   2 +-
>  xen/arch/x86/guest/Makefile                   |   6 +-
>  xen/arch/x86/guest/hyperv/Makefile            |   1 +
>  xen/arch/x86/guest/hyperv/hyperv.c            |  63 ++++++++++
>  xen/arch/x86/guest/hypervisor.c               | 116 ++++++++++++++++++
>  xen/arch/x86/guest/xen/Makefile               |   4 +
>  xen/arch/x86/guest/{ => xen}/hypercall_page.S |   0
>  xen/arch/x86/guest/{ => xen}/pvh-boot.c       |   0
>  xen/arch/x86/guest/{ => xen}/xen.c            |  73 ++---------
>  xen/arch/x86/pv/shim.c                        |   2 +-
>  xen/arch/x86/setup.c                          |  11 ++
>  xen/include/asm-x86/guest.h                   |   2 +
>  xen/include/asm-x86/guest/hypercall.h         |   2 +
>  xen/include/asm-x86/guest/hyperv.h            |  48 ++++++++
>  xen/include/asm-x86/guest/hypervisor.h        |  58 +++++++++
>  xen/include/asm-x86/guest/xen.h               |  23 +---
>  17 files changed, 337 insertions(+), 87 deletions(-)
>  create mode 100644 xen/arch/x86/guest/hyperv/Makefile
>  create mode 100644 xen/arch/x86/guest/hyperv/hyperv.c
>  create mode 100644 xen/arch/x86/guest/hypervisor.c
>  create mode 100644 xen/arch/x86/guest/xen/Makefile
>  rename xen/arch/x86/guest/{ => xen}/hypercall_page.S (100%)
>  rename xen/arch/x86/guest/{ => xen}/pvh-boot.c (100%)
>  rename xen/arch/x86/guest/{ => xen}/xen.c (80%)
>  create mode 100644 xen/include/asm-x86/guest/hyperv.h
>  create mode 100644 xen/include/asm-x86/guest/hypervisor.h
> 
> --
> 2.20.1
> 
> 
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