Re: [Qemu-devel] [PATCH v2] map 64-bit PCI BARs at location provided by emulator

[Kevin O'Connor]

On Sun, Oct 13, 2013 at 03:31:23PM +0300, Michael S. Tsirkin wrote:
> On Sun, Oct 13, 2013 at 02:13:44PM +0200, Igor Mammedov wrote:
> > Currently 64-bit PCI BARs are unconditionally mapped by BIOS right
> > over 4G + RamSizeOver4G location, which doesn't allow to reserve
> > extra space before 64-bit PCI window. For memory hotplug an extra
> > RAM space might be reserved after present 64-bit RAM end and BIOS
> > should map 64-bit PCI BARs after it.
> > 
> > Introduce "etc/pcimem64-start" romfile to provide BIOS a hint
> > where it should start mapping of 64-bit PCI BARs. If romfile is
> > missing, BIOS reverts to legacy behavior and starts mapping right
> > after high memory.
> > 
> > Signed-off-by: Igor Mammedov <address@hidden>
> > ---
> > v2:
> >   * place 64-bit window behind high RAM end if "etc/pcimem64-start"
> >     points below it.
> 
> Hmm I had an alternative suggestion of passing smbios
> tables in from QEMU (seabios already has a mechanism for this).

Irrespective of this discussion, I do think the SMBIOS tables should
be passed in from QEMU.

-Kevin