[Xen-devel] [PATCH v10 0/9] Introduce HVM without dm and new boot ABI

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

This are the remaining patches of the HVMlite series. They have been 
successfully tested on the following hardware:

 - Intel Core i3-5010U.
 - AMD Opteron 4184.

With both hap=0 and hap=1 in the configuration file. I've been able to boot
a SMP guest in this mode with a virtual hard drive and a virtual network
card, all working fine AFAICT. Migration/save/restore has also been tested 
with a SMP guest using the FreeBSD kernel provided below.

The series has been compile tested on arm32.

The series can also be found in the following git repo:

git://xenbits.xen.org/people/royger/xen.git branch hvm_without_dm_v10

And for the FreeBSD part:

git://xenbits.xen.org/people/royger/freebsd.git branch new_entry_point_v5

In case someone wants to give it a try, I've uploaded a FreeBSD kernel that
should work when booted into this mode:

https://people.freebsd.org/~royger/kernel_no_dm

This FreeBSD kernel starts the APs in long mode. There are examples for 
starting the APs in other modes in the sys/x86/xen/pv.c file.

The config file that I've used is:

<config>
kernel="/path/to/kernel_no_dm"

builder="hvm"
device_model_version="none"

memory=128
vcpus=2
name = "freebsd"
</config>

Of course if you have a FreeBSD disk already setup it can also be added to
the configuration file, and the following line can be used to point FreeBSD
to the disk:

extra="vfs.root.mountfrom=ufs:/dev/ufsid/<disk_id>"

As usual, each patch has it's own changelog.

  J   xen/x86: set the vPMU interface based on the presence
A     xen/x86: allow disabling all emulated devices inside
AW    libxc: allow creating domains without emulated
    N x86/hvm: loosen up the ASSERT in hvm_cr4_guest_reserved_bits
   M  xen/x86: allow HVM guests to use hypercalls to bring
AWJ   libxc/xen: introduce a start info structure for
AW    libxc: switch xc_dom_elfloader to be used with HVMlite
 W    libxl: allow the creation of HVM domains without a
AW M  libxl: add support for migrating HVM guests without a

A = Acked/Reviewed by Andrew Cooper.
W = Acked/Reviewed by Wei Liu.
J = Acked/Reviewed by Jan Beulich.
M = Modified in this version.
N = New in this version.

Thanks, Roger.


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