Re: Can OVMF run on an emulated QEMU ARM vexpress-a9?

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

> On 12 Jun 2017, at 21:38, Laszlo Ersek <lersek@redhat.com> wrote:
> 
> (side track)
> 
>> On 06/12/17 18:40, Ard Biesheuvel wrote:
>> On 12 June 2017 at 18:28, Laszlo Ersek <lersek@redhat.com> wrote:
> 
>>> - ArmVirtPkg/ArmVirtQemuKernel.dsc:
>>> 
>>>  - Not really sure about the QEMU configuration for this, but see
>>>    commit 8de84d424221 ("ArmVirtPkg: implement ArmVirtQemuKernel",
>>>    2016-02-05) for the intended use. I think Ard can explain it better.
>>> 
>> 
>> The standard mach-virt machine you get when using -bios boots with the
>> firmware image exposed as an emulated XIP NOR flash. Many ARM systems
>> that boot with ARM trusted firmware don't run UEFI in place but load
>> it into DRAM and execute it from there.
>> 
>> So ArmVirtQemuKernel runs from DRAM instead. It borrows the Linux
>> kernel boot protocol to achieve this, since it was already implemented
>> by QEMU via -kernel (and -bios/-pflash omitted)
> 
> Ah! So you boot that firmware binary itself with the "-kernel" option;
> is that right?
> 
> (I guess I'll finally understand why you called the DSC file
> "ArmVirtQemuKernel" :) )
> 
> 

Yes :-)