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Re: [Xen-devel] Questions about PVHv2/HVMlite


  • To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxx>
  • From: Gary R Hook <ghook@xxxxxxx>
  • Date: Tue, 16 May 2017 10:52:32 -0500
  • Delivery-date: Tue, 16 May 2017 15:52:55 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>
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On 05/15/2017 09:54 PM, Boris Ostrovsky wrote:


Possibly stupid question time...

On 05/15/2017 03:51 PM, Gary R Hook wrote:

  2) Or, perhaps more importantly, what distinguishes said guest?

Simplifying things a bit, it's an HVM guest that doesn't have device
model (i.e. qemu) and which is booted directly (i.e. without hvmloader)

So, an unmodified/stock kernel which would rely upon a typical (i.e. its
own grub) bootloader. The magic comes from the PVH drivers?

domU PVH support has been added in 4.11 kernel so you don't have it.

You refer to the drivers?

An PVH guest's config looks something like

    kernel="/root/64/vmlinux"

May I ask from whence this kernel came?

    builder="hvm"
    device_model_version="none"
    extra="root=/dev/xvda1 console=hvc0"
    memory=8192
    vcpus=2
    name = "pvh"
    disk=['/root/virt/f22.img,raw,xvda,rw']

(note device_model_version)

I saw the comment from I Roger. The overt statement of pvh intention would be a good thing.

I am, at the moment, building a 4.11 kernel in a guest, hoping to boot it in PVH mode.

Thanks,

Gary

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