Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize

[Kevin O'Connor]

On Wed, Nov 19, 2014 at 02:44:32PM +0100, Paolo Bonzini wrote:
> So:
> 
> qemu-2.0 -M pc-2.0 -> qemu-2.2 -M pc-2.0
> 
>    uses 2.0 BIOS
> 
> qemu-2.2 -M pc-2.0 -> qemu-2.0 -M pc-2.0
> 
>    uses 2.2 BIOS
> 
> Both should work, in general.  BIOS is rarely the reason for
> incompatibilities.  However, breakage can happen, for example I know
> that RHEL7 SeaBIOS does not work on RHEL6.  RHEL6 SeaBIOS works on
> RHEL7, but it needs a couple workarounds.

Do you know why that is?  We do try to make SeaBIOS backwards
compatible with older versions of QEMU.

-Kevin