Re: [Xen-devel] [PATCH v4 02/16] tools: Add vmware_hw support

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 11/09/2014 19:36, Don Slutz wrote:
> This is used to set HVM_PARAM_VMWARE_HW. It is set to the VMware
> virtual hardware version.
>
> Currently 0, 3-4, 6-11 are good values.  However the code only
> checks for == 0 or != 0.
>
> If non-zero then
>   default VGA to VMware's VGA.
>
> Also now allows vga=vmware
>
> Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
> ---
>  docs/man/xl.cfg.pod.5               | 21 +++++++++++++++++++--
>  docs/misc/hypervisor-cpuid.markdown | 29 +++++++++++++++++++++++++++++
>  tools/libxc/xc_domain_restore.c     | 14 ++++++++++++++
>  tools/libxc/xc_domain_save.c        | 11 +++++++++++
>  tools/libxc/xg_save_restore.h       |  2 ++
>  tools/libxl/libxl.h                 | 10 ++++++++++
>  tools/libxl/libxl_create.c          |  4 +++-
>  tools/libxl/libxl_dm.c              | 10 +++++++++-
>  tools/libxl/libxl_dom.c             |  2 ++
>  tools/libxl/libxl_types.idl         |  2 ++
>  tools/libxl/xl_cmdimpl.c            | 11 ++++++++++-
>  11 files changed, 111 insertions(+), 5 deletions(-)
>  create mode 100644 docs/misc/hypervisor-cpuid.markdown
>
> diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
> index 517ae2f..367b401 100644
> --- a/docs/man/xl.cfg.pod.5
> +++ b/docs/man/xl.cfg.pod.5
> @@ -1147,6 +1147,23 @@ some other Operating Systems and in some circumstance 
> can prevent
>  Xen's own paravirtualisation interfaces for HVM guests from being
>  used.
>  
> +=item B<vmware_hw=NUMBER>
> +
> +Turns on or off the exposure of VMware cpuid.  The number is the
> +VMware's hardware version number, where 0 is off.  If not zero it
> +changes the default VGA to VMware's VGA.
> +
> +The hardware version number (vmware_hw) come from VMware config files.
> +
> +=over 4
> +
> +In a .vmx it is virtualHW.version
> +
> +In a .ovf it is part of the value of vssd:VirtualSystemType.
> +For vssd:VirtualSystemType == vmx-07, vmware_hw = 7.
> +
> +=back
> +
>  =back
>  
>  =head3 Emulated VGA Graphics Device
> @@ -1185,8 +1202,8 @@ This option is deprecated, use vga="stdvga" instead.
>  
>  =item B<vga="STRING">
>  
> -Selects the emulated video card (none|stdvga|cirrus).
> -The default is cirrus.
> +Selects the emulated video card (none|stdvga|cirrus|vmware).
> +The default is cirrus (or vmware if B<vmware_hw> is not zero).
>  
>  =item B<vnc=BOOLEAN>
>  
> diff --git a/docs/misc/hypervisor-cpuid.markdown 
> b/docs/misc/hypervisor-cpuid.markdown
> new file mode 100644
> index 0000000..4199d57
> --- /dev/null
> +++ b/docs/misc/hypervisor-cpuid.markdown
> @@ -0,0 +1,29 @@
> +Hypervisor Cpuid
> +================
> +
> +The support of hypervisor cpuid leaves has not been agreed to.
> +Other then the range 0x40000000 to 0x400000ff can be used by
> +hypervisors.
> +
> +MicroSoft Hyper-V (AKA viridian) currently must be at 0x40000000.
> +
> +VMware currently must be at 0x40000000.
> +
> +KVM currently must be at 0x40000000 (from Seabios).
> +
> +Seabios will find Xen at 0x40000000, 0x40000100, 0x40000200 ..
> +0x40010000.

Anything looking for Xen according to the Xen cpuid instructions in the
public header files will find Xen in this manner;  hvmloader and
HVMLinux to name but a few.  I don't think Seabios wants calling out
specifically.

Perhaps "Xen can be found at the first otherwise unused 0x100 aligned
offset between 0x40000000 and 0x40010000"?

~Andrew


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