Reenabling of ARM64

[Ralf Ramsauer]

Hi,

during implementation of hyp-stub compatibility fixes for arm64 I
experienced that reenabling of Jailhouse fails, if there is only a very
short period of time between jailhouse disable and jailhouse enable.

Reenabling only works if I wait a few seconds after jailhouse disable,
otherwise the platforms freezes, no UART output.

I first thought that my patches somehow triggered that behavior, but
this also happens on mainline jailhouse.

Claudio, did you experience anything similar on your TX1?

Ralf

[Claudio Scordino]

Dear Ralf,

No, I didn't. But it could also be that I never tried.

I'm currently out of office. I can try to reproduce on TX1 by the end
of the week.

Best,

Claudio

[Henning Schild]

Am Mon, 12 Jun 2017 16:44:45 +0200
schrieb Ralf Ramsauer <ralf.r...@oth-regensburg.de>:

> Hi,
>
> during implementation of hyp-stub compatibility fixes for arm64 I
> experienced that reenabling of Jailhouse fails, if there is only a
> very short period of time between jailhouse disable and jailhouse
> enable.
>
> Reenabling only works if I wait a few seconds after jailhouse disable,
> otherwise the platforms freezes, no UART output.
>
> I first thought that my patches somehow triggered that behavior, but
> this also happens on mainline jailhouse.

I think i have seen that on the zynqmp and heard Jan say that that it is
a kown issue, but i am not 100% sure.

Henning

[Claudio Scordino]

Dear Raph,

2017-06-12 16:44 GMT+02:00 Ralf Ramsauer <ralf.r...@oth-regensburg.de>:

I've made a few experiments and I wasn't able of reproducing this issue.
I've tried the current master on both the 3.10 and the 4.9 kernels.

Cheers,

Claudio

[Claudio Scordino]

2017-06-16 16:45 GMT+02:00 Ralf Ramsauer <ra...@ramses-pyramidenbau.de>:
> Hi Claudio,

> thanks. Strange...
>
> A "jailhouse disable; jailhouse enable configs/..." triggers this
> behaviour on my TX1.

Quite strange. Are you using the current master branch?

Could it be depending on the kernel config or the kernel version?
If you send me your .config I can schedule some further tests next week.

Cheers,

Claudio

[Ralf Ramsauer]

Hi Claudio,

On 06/16/2017 02:00 PM, Claudio Scordino wrote:

thanks. Strange...

A "jailhouse disable; jailhouse enable configs/..." triggers this
behaviour on my TX1.

Cheers
Ralf
>
> Cheers,
>
> Claudio
>


--
Ralf Ramsauer
GPG: 0x8F10049B