arm64 UEFI hangs on startup

[Geoff Levand]

When clusterX.is_uniprocessor=1 is set in the fast model the UEFI bootloader hangs.

Last thing seen is 'The default boot selection will start in 10 seconds', and nothing progresses after that.

model: FVP_Base_AEMv8A-AEMv8A_0.8_5311/models/Linux64_GCC-4.1/FVP_Base_AEMv8A-AEMv8A

The model config file used is attached.

Using UEFI binaries from the linaro 14.01 release. I also had this problem with the linaro 13.12 binaries.

-Geoff

[Leif Lindholm (leif-lindholm)]

Steve, have a look and see if you can reproduce with 2014.04.

[Ryan Harkin (ryanharkin)]

The BSP has not been designed to work in anything other then SMP setups, so this is not a supported configuration.

[Steven Kinney (steven-kinney)]

Leif,

            Will do.

-Steve

On 24 April 2014 11:07, Leif Lindholm <email address hidden> wrote:

> Steve, have a look and see if you can reproduce with 2014.04.
>
> ** Changed in: linaro-uefi
> Assignee: (unassigned) => Steven Kinney (steven-kinney)
>
> ** Changed in: linaro-uefi
> Assignee: Steven Kinney (steven-kinney) => Ryan Harkin (ryanharkin)
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1281855
>
> Title:
> arm64 UEFI hangs on startup
>
> Status in UEFI Support in Linaro:
> Won't Fix
>
> Bug description:
> When clusterX.is_uniprocessor=1 is set in the fast model the UEFI
> bootloader hangs.
>
> Last thing seen is 'The default boot selection will start in 10
> seconds', and nothing progresses after that.
>
> model: FVP_Base_AEMv8A-AEMv8A_0.8_5311/models/Linux64_GCC-4.1
> /FVP_Base_AEMv8A-AEMv8A
>
> The model config file used is attached.
>
> Using UEFI binaries from the linaro 14.01 release. I also had this
> problem with the linaro 13.12 binaries.
>
> -Geoff
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/linaro-uefi/+bug/1281855/+subscriptions
>

[Geoff Levand (geoff.levand)]

Hi,

On Thu, 2014-04-24 at 16:10 +0000, Ryan Harkin wrote:
> The BSP has not been designed to work in anything other then SMP setups,
> so this is not a supported configuration.
>
> ** Changed in: linaro-uefi
> Status: New => Won't Fix

I'm not sure what you mean by 'BSP', but I guess it means there
is some limitation of the model. If so, we should fix the model
help. Here is what's in there now:

cluster0.NUM_CORES=0x4 # (int , init-time) default = '0x4' : Number of cores in cluster0 : [0x1..0x4]
cluster1.NUM_CORES=0x4 # (int , init-time) default = '0x4' : Number of cores in cluster1 : [0x0..0x4]

Do we need to file another bug for this, or re-open this one? I'm not
sure where to file model bugs.

-Geoff

[Ryan Harkin (ryanharkin)]

You can run with NUM_CORES=1.

Uniprocessor and NUM_CORES=1 are two different things, architecturally. The BSP is the UEFI code written to allow you to build a binary that runs on the model. This won't have been written with the concept of putting the CPUs into uniprocessor mode.