Re: [Qemu-devel] [PATCH v1 00/22] target-arm: Preparations for A64 EL2 and 3

[Christopher Covington]

Hi Sergey,

On 05/15/2014 05:45 AM, Sergey Fedorov wrote:
> On 15.05.2014 13:28, Aggeler Fabian wrote:
>> Hi Greg
>>
>> Thanks for your comments. I still have to work through them. I am using 
>> OpenVirtualization in secure world, which then switches to a Linux kernel in 
>> non-secure world to test the patches. What about you?
>>
>> Best,
>> Fabian
> 
> Hi, Fabian, are there some secure OS with secure user-space tasks which
> can be used for testing whether world switching is performed correctly?

In my experience, A32 and A64 Linux runs fine in secure supervisor mode /
EL1_S (KVM, if enabled, will fail gracefully). A32 and A64 Linux applications
run fine in secure user mode / EL0_S.

For A64 EL3 there's https://github.com/ARM-software/arm-trusted-firmware,
although I've yet to use it myself. It advertises an EL1 test payload.

Christopher

>>
>> On 14 May 2014, at 15:55, Greg Bellows 
>> <address@hidden<mailto:address@hidden>> wrote:
>>
>> Hi Fabian,
>>
>> I too had been updating the core TZ patches provided by Samsung.  From 
>> looking at your changes I see a lot of similarities in our code with the 
>> exception being the mechanism for banked register support.  The difference 
>> being that your approach is a bit more explicit in the declaration of the 
>> banked registers.  Whereas my approach was to update the banked registers 
>> once all the other registers were registered.  Both approaches I believe 
>> work.
>>
>> I spoke with Peter M. and he and I are okay with your approach.  I will be 
>> looking closer at your patches today and making comments.
>>
>> One thing that held me up from committing sooner was testing my changes.  Do 
>> you have a good approach for testing the changes?
>>
>> Regards,
>>
>> Greg
>>
>>
>> On 14 May 2014 03:58, Aggeler Fabian <address@hidden<mailto:address@hidden>> 
>> wrote:
>> I see. What is Greg Bellows working on exactly? Also peripherals like TZASC, 
>> TZPC,...? My plan is to focus on them now if no one else is working on them. 
>> What do you suggest to minimize overlap?
>>
>> Thanks,
>> Fabian
>> ________________________________________
>> From: Peter Maydell address@hidden<mailto:address@hidden>]
>> Sent: Monday, May 12, 2014 10:39 PM
>> To: Aggeler  Fabian
>> Cc: Edgar E. Iglesias; Rob Herring; Peter Crosthwaite; QEMU Developers; 
>> Alexander Graf; John Williams; Alex Bennée; Greg Bellows
>> Subject: Re: [Qemu-devel] [PATCH v1 00/22] target-arm: Preparations for A64 
>> EL2 and 3
>>
>> On 12 May 2014 20:13, Aggeler  Fabian 
>> <address@hidden<mailto:address@hidden>> wrote:
>>> I’ve been reworking the Samsung patches as part of my Master thesis and I 
>>> wanted to
>>> send them some time this week. I am currently rebasing them when I noticed 
>>> Edgar’s
>>> patches. Is there some branch with the patches so I could rebase on them?
>> Hmm, that makes about three lots of people trying to do similar things
>> at this point. We should try to coordinate so we don't duplicate work.
>>
>> thanks
>> -- PMM
>>
>>
>>
> 
> 


-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by the Linux Foundation.