[Xen-devel] [PATCH 00/18][V6]: PVH xen: version 6 patches...

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

I've version 6 of my patches for 64bit PVH guest for xen.  This is Phase I.
These patches are built on top of git
c/s: 9204bc654562976c7cdebf21c6b5013f6e3057b3

V6:
The biggest change in V6 is dropping of dom0 PVH. It will take some time
to investigate and redo dom0 construct to use unmodified PV code. These 
patches in V6 will allow PV dom0 to create PVH domU. Please ack or indicate
individual patches if there are no issues, so I know they have been looked
at.


Repeating from before:

Phase I:
   - Establish a baseline of something working. These patches allow for
     dom0 to be booted in PVH mode, and after that guests to be started
     in PV, PVH, and HVM modes. I also tested booting dom0 in PV mode,
     and starting PV, PVH, and HVM guests.

     Also, the disk must be specified as phy: in vm.cfg file:
         > losetup /dev/loop1 guest.img
         > vm.cfg file: disk = ['phy:/dev/loop1,xvda,w']          

     I've not tested anything else.
     Note, HAP and iommu are required for PVH.

As a result of V3, there were two new action items on the linux side before
it will boot as PVH: 1)MSI-X fixup and 2)load KERNEL_CS righ after gdt switch.

As a result of V5 a new fixme:
  - MMIO ranges above the highest covered e820 address must be mapped for dom0.

Following fixme's exist in the code:
  - Add support for more memory types in arch/x86/hvm/mtrr.c.
  - arch/x86/time.c: support more tsc modes.
  - check_guest_io_breakpoint(): check/add support for IO breakpoint.
  - implement arch_get_info_guest() for pvh.
  - vmxit_msr_read(): during AMD port go thru hvm_msr_read_intercept() again.
  - verify bp matching on emulated instructions will work same as HVM for
    PVH guest. see instruction_done() and check_guest_io_breakpoint().

Following remain to be done for PVH:
   - AMD port.
   - Avail PVH dom0 of posted interrupts. (This will be a big win).
   - 32bit support in both linux and xen. Xen changes are tagged "32bitfixme".
   - Add support for monitoring guest behavior. See hvm_memory_event* functions
     in hvm.c
   - Change xl to support other modes other than "phy:".
   - Hotplug support
   - Migration of PVH guests.

Thanks for all the help,
Mukesh



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