Re: [Qemu-block] [Qemu-devel] [Xen-devel] Question about xen disk unplug support for ahci missed in qemu

2015-10-16 Thread Ian Campbell
On Fri, 2015-10-16 at 10:06 +0100, Stefano Stabellini wrote: > > What's the reason for the "stumbling block" that requires the BIOS to > > tear down the Xen ring prior to the OS being able to replace it? The > > BIOS disk calls are all synchronous, so the ring wont be active when > > the OS bring

Re: [Qemu-block] [Xen-devel] [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu

2015-10-14 Thread Ian Campbell
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 n