[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for
From: |
Ian Campbell |
Subject: |
Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu |
Date: |
Wed, 14 Oct 2015 12:27:52 +0100 |
On Wed, 2015-10-14 at 12:06 +0100, Stefano Stabellini wrote:
> > Can't you just teach SeaBIOS how to deal with your PV disks and then
> > only add that to your VM and forget about IDE/AHCI? I mean, that's how
> > it's done for virtio-blk, and it doesn't involve any insanities like
> > ripping out non-hotpluggable devices.
>
> Teaching SeaBIOS to deal with PV disks can be done, in fact we already
> support PV disks in OVMF. It is possible to boot Windows with OVMF
> without any IDE disks (patch pending for libxl to create a VM without
> emulated IDE disks).
One stumbling block in the past has been how to know when the PV drivers in
the BIOS are no longer required, such that the ring can be torn down and/or
the connection etc handed over to the OS driver.
I think we deal with this in OVMF using ExitBootServices? (TBH I'm not sure
how). AFAIK the BIOS interfaces do not have anything as reliable as that.
How does virtio deal with this in the BIOS case?
Ian.
- [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, Fabio Fantoni, 2015/10/13
- Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, John Snow, 2015/10/13
- Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, Stefano Stabellini, 2015/10/13
- Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, Kevin Wolf, 2015/10/14
- Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, Stefano Stabellini, 2015/10/14
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu,
Ian Campbell <=
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Laszlo Ersek, 2015/10/15
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Kevin O'Connor, 2015/10/15
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Stefano Stabellini, 2015/10/16
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Laszlo Ersek, 2015/10/16
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Stefano Stabellini, 2015/10/16
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Ian Campbell, 2015/10/16
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Kevin O'Connor, 2015/10/16
- Re: [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu, Laszlo Ersek, 2015/10/16
- Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, Kevin Wolf, 2015/10/14
- Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu, Stefano Stabellini, 2015/10/15