Re: [PATCHv2] Support for booting from virtio disks

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On 05/10/2010 06:48 PM, Anthony Liguori wrote:
On 05/10/2010 03:11 AM, Gleb Natapov wrote:
This patch adds native support for booting from virtio disks to Seabios.

Signed-off-by: Gleb Natapov<gleb@xxxxxxxxxx>

A related problem that I think we need to think about how we solve is indicating to Seabios which device we want to boot from

With your patch, a user can select a virtio device explicitly or if they use only one virtio device, it will Just Work.

However, if a user uses IDE and virtio, or a user has multiple disks, they cannot select a device via -boot.

Is this something we need to address? I don't think we'd break libvirt if we didn't.

BIOSes traditionally address this by storing the boot order in RTC non-volatile memory, and allow the user to configure the order via a menu. We could do the same (storing the RTC memory in a small disk image).

Alternatively we can seed the order from the command line (-boot id1,id2,id3 where id* are some qdev property attached to disks, this is more flexible than the current syntax I think).

--
error compiling committee.c: too many arguments to function

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