[U-Boot] Use of QEMU UEFI payland with persistent environment

[Otavio Salvador]

On Thu, Dec 8, 2016 at 4:55 PM, Simon Glass <sjg at chromium.org> wrote:
> Hi Otavio,
>
> On 8 December 2016 at 10:39, Otavio Salvador
> <otavio.salvador at ossystems.com.br> wrote:
>> Hello everyone,
>>
>> We are trying to automate some tests and one of the parts of the
>> project requires the use of persistent environment.
>>
>> Due performance advantages we would like to use x86 with KVM to
>> execute the tests however after booting QEMU with the UEFI payload it
>> turns out the environment cannot be saved. Did someone ever made it
>> work?
>
> Do you expect it to save to SPI flash? If so, does QEMU provide a way
> to emulate that in a persistent file, or similar?

The SPI flash would be ideal as we could keep it for reuse.

It seems we can pass a file with:

-drive if=pflash,format=raw,<file>

But I did not find how to make it writable and make U-Boot to use it.

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750