Re: [edk2-devel] [PATCH 1/2] OvmfPkg/build.sh: use newer '-drive if=pflash' syntax when running qemu

["Jordan Justen" <jordan.l.justen@intel.com>]

On 2019-07-24 10:39:20, Philippe Mathieu-Daudé wrote:
> On 7/24/19 7:26 PM, Jordan Justen wrote:
> > Hmm, it looks like qemu 2.0 is when the multiple flash device support
> > was added: https://wiki.qemu.org/ChangeLog/2.0
> > 
> > The build.sh script currently attempts to detect 1.6 and newer for
> > flash support. pflash first appeared in 1.1, but kvm support was added
> > in 1.6. I think it'd be reasonable to alter the script to not use
> > flash for qemu < 2.0, to enable using separate code and vars binaries.
> 
> Where can I find the range of QEMU versions used by EDK2?
> I'm trying to understand why it is important to still maintain scripts
> for a such old version.

OvmfPkg/README mentions as far back as qemu 0.10. It seems it was
update from 0.9.1 to 0.10 in 2012.

(Oh, cool! OVMF just passed 10 years of being released as open source.
Since May of 2009! :)

I think we've tried to keep the range of versions that it works with
as wide as possible, but I think we could (and perhaps should) discuss
raising the minimum supported version of qemu. qemu 2.0 is over 5
years old now. qemu 0.10.0 is over 10 years old.

One thing that was originally problematic (for raising the qemu
requirement) was finding windows builds of newer qemu releases. The
main website seems to link to windows builds of the latest releases
now: https://www.qemu.org/download/#windows

-Jordan