Re: [Xen-users] Booting xen using uboot+efi on Rock64

["AKASHI, Takahiro" <takahiro.akashi@xxxxxxxxxx>]

On Fri, May 25, 2018 at 10:05:47AM +0100, Andre Przywara wrote:
> Hi,
> 
> On 24/05/18 15:34, Julien Grall wrote:
> > (+Andre)
> > 
> > On 24/05/18 14:35, Todd Stellanova wrote:
> >> Hello,
> > 
> > Hi Todd,
> > 
> > I have CCed Andre who has some knowledge about UEFI in U-boot.
> > 
> >>
> >> I'm trying to get Xen running on the Rock64 SBC (Rockchip RK3328).
> >> The long details of my setup are here:
> >> https://forum.pine64.org/showthread.php?tid=6059
> >>
> >> Basically I'm at a point where I am able to manually kick off efi boot
> >> from a uboot command line and getting a couple of errors
> >> (FDT_ERR_BADMAGIC and one that looks like it's coming from the EFI
> >> loader)-- see the output from uboot below.
> 
> As you figured already, this error means that U-Boot didn't find a
> specifically loaded dtb. In this case it will use the DT that U-Boot
> itself uses. Last time I checked there were subtle incompatibilities
> between the two. I started with patches fixing this, but this will take
> some time.
> So in the meantime I recommend using the .dtb from the latest mainline
> kernel.
> 
> >> Any suggestions on what to try next? Thanks for any ideas.
> >>
> >> => set devtype mmc
> >>
> >> => set devnum 1
> >>
> >> => set distro_bootpart 6
> >>
> >> => run boot_efi_binary
> >>
> >> reading efi/boot/bootaa64.efi
> >>
> >> 885072 bytes read in 129 ms (6.5 MiB/s)
> >>
> >> libfdt fdt_check_header(): FDT_ERR_BADMAGIC
> >>
> >> ## Starting EFI application at 02000000 ...
> >>
> >> Card did not respond to voltage select!
> >>
> >> mmc_init: -95, time 10
> >>
> >> Scanning disk rksdmmc@xxxxxxxxxxxx <mailto:rksdmmc@xxxxxxxxxxxx>...
> >>
> >> Scanning disk rksdmmc@xxxxxxxxxxxx <mailto:rksdmmc@xxxxxxxxxxxx>...
> >>
> >> Found 2 disks
> >>
> >> Xen 4.11-rc (c/s Tue May 1 09:03:13 2018 +0100 git:0306a1311d) EFI loader
> >>
> >> Couldn't obtain the File System Protocol Interface: ErrCode:
> >> 0x8000000000000003
> 
> So this smells like a missing interface in U-Boot's EFI implementation.
> CCing Akashi and Alex, who are working on extending this.

0x3 means "UNSUPPORTED."

> What version of U-Boot are you running? If possible, try to upgrade to
> the latest version, as the EFI support is continually improving.

"Simple File System Protocol" has been supported since v2017.11.

Thanks
-Takahiro AKASHI

> What should work already is grub, though. So you could take the detour
> of loading grub as an EFI application from U-Boot, then loading Xen from
> there. That should give you more comfort anyway.
> 
> Or you take the old road and load Xen directly from U-Boot. Check the
> Espressobin instruction for a reference on this:
> https://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions/ESPRESSObin
> 
> 
> Cheers,
> Andre.

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