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/APMXGeneMust... 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