Kernel 5.5

[xeno74]

Kernel 5.5 Alpha3 up and running on the AmigaOne X5000

Hi Skateman,

Many thanks for testing the alpha3!

Cheers,
Christian

[xeno74]

Hi All,

I released the alpha4 of kernel 5.5 for the X1000 and X5000 today.

New:

• PowerPC updates 5.5-1
• X5000/20 and X5000/40: cyrus_5.5-2.patch
• X5000/20 and X5000/40: coherent_cache-v2.patch
• X5000/20 and X5000/40: mem-v3.patch
• Linux Git log
• Phoronix articles, reviews and news stories covering Linux 5.5

Download: linux-image-5.5-alpha4-X1000_X5000.tar.gz

I successfully tested the alpha4 of kernel 5.5 with Fienix PPC32, ubuntu MATE 16.04.6 LTS PPC32, Fedora 27 PPC64, and with openSUSE Tumbleweed 20190722 PPC64 today (see screenshots).







Please test the kernels.

Thanks,
Christian

[Skateman]

Kernel 5.5 Alpha 4 Running on the AmigaOne X5000



Big picture http://www.skateman.nl/wp-content/uploa ... 214718.png

[xeno74]

Kernel 5.5 Alpha 4 Running on the AmigaOne X5000

Thanks a lot for testing the alpha4!

[xeno74]

Great news!

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.

Code: Select all

arch/powerpc/mm/mem.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index be941d382c8d..14c2c53e3f9e 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -260,6 +260,14 @@ void __init mem_init(void)
 	BUILD_BUG_ON(MMU_PAGE_COUNT > 16);
 
 #ifdef CONFIG_SWIOTLB
+	/*
+	 * Some platforms (e.g. 85xx) limit DMA-able memory way below
+	 * 4G. We force memblock to bottom-up mode to ensure that the
+	 * memory allocated in swiotlb_init() is DMA-able.
+	 * As it's the last memblock allocation, no need to reset it
+	 * back to to-down.
+	 */
+	memblock_set_bottom_up(true);
 	swiotlb_init(0);
 #endif
 

Link to the thread: [PATCH] powerpc: ensure that swiotlb buffer is allocated from low memory

[xeno74]

Hi All,

Here is the alpha5 of the kernel 5.5 for testing.

New:

• X5000/20 and X5000/40: coherent_cache-v3.patch
• Linux Git log
• Phoronix articles, reviews and news stories covering Linux 5.5

Download: linux-image-5.5-alpha5-X1000_X5000.tar.gz



Please test the kernels.

Thanks,
Christian

[Skateman]

Kernel 5.5 Alpha 5 up and running on the AmigaOne X5000



Big picture http://www.skateman.nl/wp-content/uploa ... 202426.png

[xeno74]

Kernel 5.5 Alpha 5 up and running on the AmigaOne X5000

Many thanks for testing the alpha5!

[xeno74]

Hi All,

I released the alpha6 for testing today.

New:

• PowerPC fixes 5.5-2
• PowerPC fixes 5.5-3
• Linux Git log
• Phoronix articles, reviews and news stories covering Linux 5.5

Download: linux-image-5.5-alpha6-X1000_X5000.tar.gz



@Darren
Could you please submit your pcmcia patch to the kernel developers?

@All
Please test the kernels.

Thanks,
Christian

[Skateman]

Kernel 5.5 Alpha 6 up and running on the AmigaOne X5000



Big picture http://www.skateman.nl/wp-content/uploa ... 161036.png