[PATCH v5 06/26] arm: qemu: Add a devicetree file for qemu_arm64

François Ozog francois.ozog at linaro.org
Thu Nov 4 12:48:01 CET 2021

Hi Peter

Le jeu. 4 nov. 2021 à 12:41, Peter Maydell <peter.maydell at linaro.org> a
écrit :

> On Thu, 4 Nov 2021 at 11:22, François Ozog <francois.ozog at linaro.org>
> wrote:
> > Le jeu. 4 nov. 2021 à 12:09, Peter Maydell <peter.maydell at linaro.org> a
> écrit :
> >>
> >> Well, our recommendation really was that the ideal thing would
> >> be "you take the dtb that QEMU passes you at runtime, and at
> >> runtime combine that with whatever extra information you want".
> >
> > That looks just reasonable this way.
> > So we need a « -mergedtb » option for Qemu to have the same
> > capability. This would merge the QEMU generated one with the
> > command line provided.
> No, I mean that the guest, ie u-boot, should do the merging,
> not QEMU.

for most of the cases it works. But, as I tried to explain some cases need
earlier merging hence trying to get QEMU do the same thing as TFA as «
prior loaders » in the boot chain. Worst case we can have the behavior by
booting TFA then U-Boot then Linux under QEMU, but the best would be to get
the facility directly when TFA is not on the path of the boot like with the
VBE boot flow.

> -- PMM
François-Frédéric Ozog | *Director Business Development*
T: +33.67221.6485
francois.ozog at linaro.org | Skype: ffozog

More information about the U-Boot mailing list