Re: Keystone Issue

[Julien Grall <julien@xxxxxxx>]

Hello,

I have a few questions in order to understand a bit more your problem.

On 01/06/2020 13:38, CodeWiz2280 wrote:
> Hello, I am using a Texas Instruments K2E Keystone Eval board with Linux 
> 4.19.59.  It has a 32-bit ARM Cortex A15 processor. There is keystone 
> specific code in the kernel in arch/arm/mm/pv-fixup-asm.s that executes 
> during early_paging_init for LPAE support.  This causes the kernel to 
> switch its running 32-bit address space to a 36-bit address space and 
> the hypervisor traps repeatedly and stops it from booting.
Without any log it is going to be difficult to help. Could you post the 
hypervisor log when debug is enabled?
>   I suspect 
> this is because Xen only allowed for the original 32-bit memory range 
> specified by the dom0 device tree.
How much RAM did you give to your Dom0?

> The 36-bit LPAE address is a fixed 
> offset from the 32-bit address and is not physically different memory.
I am not sure to understand this. Are you suggesting that the kernel is 
trying to relocate itself in a different part of the physical memory?
Can you provide more details on the fixed offset?

>  
> Can you suggest any way to get through this problem? I am using the 
> master branch of xen from earlier this year.  
Can you provide the exact baseline your are using? Did make any changes 
on top?
> Any help is greatly 
> appreciated.
Best regards,

--
Julien Grall