From: Dirk Behme <dirk.behme@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] ARMv8: Use U-Boot to boot Xen?
Date: Fri, 29 Jan 2016 16:54:45 +0100 [thread overview]
Message-ID: <56AB8B45.5070801@gmail.com> (raw)
In-Reply-To: <1454059136.26591.95.camel@hellion.org.uk>
On 29.01.2016 10:18, Ian Campbell wrote:
> On Fri, 2016-01-29 at 12:04 +0800, Peng Fan wrote:
>> Hi Dirk,
>>
>> Cc Ian xen experts.
>>
>> On Thu, Jan 28, 2016 at 08:06:30PM +0100, Dirk Behme wrote:
>>> Hi,
>>>
>>> are there any U-Boot examples/patches to boot Xen on an ARMv8/aarch64
>>> system?
>>>
>>> I've found
>>>
>>> http://lists.denx.de/pipermail/u-boot/2015-October/230077.html
>>>
>>> what might be helpful.
>>>
>>> But maybe I missed anything else?
>>
>> I guess you are asking steps how to boot xen using uboot?
>>
>> You may need to take this:
>> http://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions
>
> Indeed.
>
> In addition one AArch64 system which uses u-boot and which has concrete
> instructions is the APM X-Gene/Mustang:
> http://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions/APMXGeneMustang
> which would likely be helpful.
Yes, that page is very helpful, thanks!
But I think it misses one information, or most probably the
configuration on that board is different. Above page just do a 'run
xen_run' which in the end does the necessary tftp loading and finally
the bootm to start Xen.
So I'd assume that on that board U-Boot runs at EL3 or EL2 (?).
In my environment, U-Boot runs at EL1. I.e. after loading Xen by tftp
I somehow need to switch to EL2 to be able to start Xen.
And this is what I think I miss. How to switch from U-Boot running at
EL1 to hypervisor mode EL2? Therefore I'd think that
http://lists.denx.de/pipermail/u-boot/2015-October/230077.html
might be helpful.
Best regards
Dirk
next prev parent reply other threads:[~2016-01-29 15:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-28 19:06 [U-Boot] ARMv8: Use U-Boot to boot Xen? Dirk Behme
2016-01-29 0:29 ` Simon Glass
2016-01-29 4:04 ` Peng Fan
2016-01-29 9:18 ` Ian Campbell
2016-01-29 15:54 ` Dirk Behme [this message]
2016-01-29 16:23 ` Ian Campbell
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