Re: [Xen-devel] [HACKATHON 2016] ARM Status

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, May 17, 2016 at 10:57:12AM +0100, Julien Grall wrote:
> Hi Konrad,
> 
> On 16/05/16 20:43, Konrad Rzeszutek Wilk wrote:
> >On Thu, May 05, 2016 at 04:41:51PM +0100, Steve Capper wrote:
> >>[Apologies for the late send]
> >>
> >>Xen - ARM Status
> >>================
> >>There was discussion on the following items:
> >>
> >>*) Booting Xen on 64-bit ARM SoC
> >>   o) Unfortunately Xen was executed in EL1.
> >>   o) Advice was given that the firmware should boot the Xen in EL2.
> >>   o) The ARMv7 secure mode switch to Hyp trick is not valid on AArch64.
> >>
> >>*) ARMv7 Cubietruck bringup was also discussed
> >>   o) One pain point mentioned was debugging the DomU guest
> >>   o) There are no debug capabilities for a Xen guest, but
> >>   o) There are a set of hyp calls that can be placed in the guest to
> >>      aid with debugging.
> >>   o) The documentation on these hyp calls needs refreshing in a wiki
> >>      somewhere?
> >>   o) Details of these can be found at: xen/arch/arm/traps.c
> >>
> >>*) There is no list of names/ownership for HW platforms
> >>   o) This is due to it being non-trivial to deduce a name from wiki
> >>      activity.
> >>   o) If people care about a board, they should make themselves known.
> >
> >I care about the CubieBoard5. I hadn't actually been able to do
> >much on it as the default loaded firmware does not seem to be
> >able to read any microSD card so I am afraid to update the uboot.
> 
> I haven't played with the CubieBoard5 before. From my understanding, the
> firmware/bootloader resides at the beginning of the SD-card.
> 
> So if you backup your SD-card you will be able to revert any non-working
> change. For more details see [1].

But that is the problem - the SD-card is built-in.

Oh, but it mentions TFTP! That may do it.
Let me try that. Thanks.

> 
> Regards,
> 
> [1] https://linux-sunxi.org/Bootable_SD_card#Bootloader
> 
> -- 
> Julien Grall

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