Kernel 5.5

AmigaOne X5000 platform specific issues related to Linux only.
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xeno74
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Re: Kernel 5.5

Post by xeno74 »

Skateman wrote:Kernel 5.5 Alpha 6 up and running on the AmigaOne X5000
Hi Skateman,

Many thanks for testing the alpha6! :-)

Have a nice Sunday evening!

Cheers,
Christian
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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Skateman
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Re: Kernel 5.5

Post by Skateman »

Kernel 5.5 RC1 up and running on the AmigaOne X5000

Image

Big picture http://www.skateman.nl/wp-content/uploa ... 203937.png
AmigaOne X5000 -> 2GHz / 16GB RAM / Radeon R7 250 / M-Audio 5.1 -> AmigaOS 4.1 FE / Ubuntu Linux
Amiga 1200 -> Recapped / 68ec020 ACA 1221ec / CF HDD / RetroNET connected to the world

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

Skateman wrote:Kernel 5.5 RC1 up and running on the AmigaOne X5000
Thanks a lot for testing the RC1! :-)
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

Hi All,

The RC2 doesn't boot on the X1000 and X5000 currently.

Code: Select all

Oops: Kernel access of bad area, sig: 11 [#1]

.do_mount_root+0x4c/0x16c [unreliable]
Linus Torvalds has already fixed this issue. :-)

Link: Fix root mounting with no mount options

Cheers,
Christian
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

Hi All,

Here is the RC2 of kernel 5.5 for testing.

New:
Download: linux-image-5.5-rc2-X1000_X5000.tar.gz

Image

Please test the kernels.

Thanks,
Christian
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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Skateman
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Location: The Netherlands

Re: Kernel 5.5

Post by Skateman »

As expected... Kernel 5.5 RC2 running fine on the AmigaOne X5000 :-)

Image

Big picture http://www.skateman.nl/wp-content/uploa ... 191837.png
AmigaOne X5000 -> 2GHz / 16GB RAM / Radeon R7 250 / M-Audio 5.1 -> AmigaOS 4.1 FE / Ubuntu Linux
Amiga 1200 -> Recapped / 68ec020 ACA 1221ec / CF HDD / RetroNET connected to the world

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

Skateman wrote:As expected... Kernel 5.5 RC2 running fine on the AmigaOne X5000 :-)
Hi Skateman,

Thanks a lot for the fast testing! :-)

Have a nice evening!

Christian
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

Great news! :-)
Michael Ellerman wrote: On Wed, 2019-12-04 at 12:35:24 UTC, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Some powerpc platforms (e.g. 85xx) limit DMA-able memory way below 4G. If a
> system has more physical memory than this limit, the swiotlb buffer is not
> addressable because it is allocated from memblock using top-down mode.
>
> Force memblock to bottom-up mode before calling swiotlb_init() to ensure
> that the swiotlb buffer is DMA-able.
>
> Link: https://lkml.kernel.org/r/F1EBB706-73DF ... enosoft.de
> Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/8fabc6 ... 86c1fa33af

cheers
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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xeno74
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Re: Kernel 5.5

Post by xeno74 »

FYI: use generic DMA mapping code in powerpc V4
Hi All,

We still have some issues with PCI cards in our FSL P5020 and P5040
systems since the DMA mapping updates. [1, 2]

We have to limit the RAM to 3500MB for some problematic PCI cards.
(kernel boot argument 'mem=3500M')

The problematic DMA mapping code was added with the PowerPC updates
4.21-1 to the official kernel source code last year. [3]

We have created a bug report. [4]

The old 4.x kernels aren't affected because they use the old DMA code.

Please check the new DMA code again.

Thanks,
Christian

[1]
http://forum.hyperion-entertainment.com ... 486#p49486
[2]
http://forum.hyperion-entertainment.com ... =50#p49099
[3]
https://git.kernel.org/pub/scm/linux/ke ... a1186c96e2
[4] https://bugzilla.kernel.org/show_bug.cgi?id=205201


On 28 November 2018 at 4:55 pm, Christian Zigotzky wrote:
> On 28 November 2018 at 12:05PM, Michael Ellerman wrote:
>> Nothing specific yet.
>>
>> I'm a bit worried it might break one of the many old obscure platforms
>> we have that aren't well tested.
>>
> Please don't apply the new DMA mapping code if you don't be sure if it
> works on all supported PowerPC machines. Is the new DMA mapping code
> really necessary? It's not really nice, to rewrote code if the old
> code works perfect. We must not forget, that we work for the end
> users. Does the end user have advantages with this new code? Is it
> faster? The old code works without any problems. I am also worried
> about this code. How can I test this new DMA mapping code?
>
> Thanks
>
>
http://www.amigalinux.org
http://www.supertuxkart-amiga.de

Running Linux on AmigaONEs can require some tinkering.

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