Re: [OE-core] linux-yocto.inc: remove riscv-isa-clear.scc from KERNEL_FEATURES_RISCV?

[Michael Opdenacker <michael.opdenacker@rootcommit.com>]

On 11/27/25 12:03, Michael Opdenacker wrote:
> Hi Gyorgy
>
> On 11/27/25 11:46, Gyorgy Sarvari wrote:
>>
>> On 11/27/25 11:20, Michael Opdenacker via lists.openembedded.org wrote:
>>> Greetings,
>>>
>>> I'm getting the same issue trying a master build on several RISC-V 
>>> boards:
>>>
>>> ERROR: linux-milkv-duo-dev-1.0-r0 do_kernel_metadata: Feature
>>> 'arch/riscv/tunes/riscv-isa-clear.scc' not found, this will cause
>>> configuration failures.
>>> ERROR: linux-milkv-duo-dev-1.0-r0 do_kernel_metadata: Check the SRC_URI
>>> for meta-data repositories or directories that may be missing
>>> ERROR: linux-milkv-duo-dev-1.0-r0 do_kernel_metadata: Set
>>> KERNEL_DANGLING_FEATURES_WARN_ONLY to ignore this issue
>>>
>>> OK, I can set
>>> KERNEL_DANGLING_FEATURES_WARN_ONLY = "1"
>>> but is this a clean solution?
>>>
>>> Where are all the arch/riscv/tunes/riscv-isa-*.scc files supposed to 
>>> be?
>>> I didn't manage to find them anywhere...
>> Do you have the yocto-kernel-cache[1] repo in your SRC_URI? The scc
>> files come from there
>>
>> [1]: 
>> https://git.yoctoproject.org/yocto-kernel-cache/tree/arch/riscv/tunes
>
> Ho, thanks! That was exactly what I needed.
> I will add these to my kernel recipes.

Interestingly, the Linux 6.18-rc7 kernel on my OrangePi RV2 board hates 
the change.

It's not completely crashing, but many devices get initialized with the 
same kind of error:

"device non-coherent but no non-coherent operations supported"

0.111641] ------------[ cut here ]------------
[ 0.111652] spacemit,k1-ccu d4090000.clock-controller: device 
non-coherent but no non-coherent operations supported
[ 0.111659] WARNING: CPU: 0 PID: 1 at 
/usr/src/kernel/arch/riscv/mm/dma-noncoherent.c:139 
arch_setup_dma_ops+0x96/0xfc
[ 0.111673] Modules linked in:
[ 0.111682] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G S 6.18.0-rc7 
#1 NONE
[ 0.111690] Tainted: [S]=CPU_OUT_OF_SPEC
[ 0.111693] Hardware name: OrangePi RV2 (DT)
[ 0.111696] epc : arch_setup_dma_ops+0x96/0xfc
[ 0.111703] ra : arch_setup_dma_ops+0x96/0xfc
[ 0.111709] epc : ffffffff8001ea02 ra : ffffffff8001ea02 sp : 
ffffffc600043b70
[ 0.111713] gp : ffffffff81a1ae08 tp : ffffffd700230000 t0 : 
ffffffff81829520
[ 0.111717] t1 : ffffffff8181c228 t2 : 2d2d2d2d2d2d2d2d s0 : 
ffffffc600043b90
[ 0.111720] s1 : ffffffd700b79c10 a0 : 0000000000000067 a1 : 
00000000fffff264
[ 0.111724] a2 : 0000000000000000 a3 : 00000000fffff264 a4 : 
0000000000000000
[ 0.111728] a5 : 0000000000000000 a6 : 0000000000000004 a7 : 
0000000000000000
[ 0.111731] s2 : 0000000000000000 s3 : 0000000000000000 s4 : 
0000000000000000
[ 0.111734] s5 : ffffffff80e30800 s6 : 0000000000000008 s7 : 
0000000000000000
[ 0.111738] s8 : 0000000000000143 s9 : 0000000000000000 s10: 
0000000000000000
[ 0.111742] s11: 0000000000000000 t3 : 0000000000000070 t4 : 
00007fffffffffff
[ 0.111744] t5 : 00007fffffffffff t6 : ffffffff81a3de07
[ 0.111747] status: 0000000200000120 badaddr: 0000000000000000 cause: 
0000000000000003
[ 0.111752] [<ffffffff8001ea02>] arch_setup_dma_ops+0x96/0xfc
[ 0.111761] [<ffffffff80918f30>] of_dma_configure_id+0x94/0x208
[ 0.111770] [<ffffffff80720050>] platform_dma_configure+0xa4/0xac
[ 0.111778] [<ffffffff8071d8cc>] really_probe+0x54/0x22c
[ 0.111785] [<ffffffff8071db00>] __driver_probe_device+0x5c/0xd4
[ 0.111791] [<ffffffff8071dc3e>] driver_probe_device+0x2e/0xf4
[ 0.111796] [<ffffffff8071de66>] __driver_attach+0x6e/0x14c
[ 0.111802] [<ffffffff8071bae0>] bus_for_each_dev+0x60/0xb0
[ 0.111807] [<ffffffff8071d432>] driver_attach+0x1a/0x24
[ 0.111813] [<ffffffff8071cc9a>] bus_add_driver+0xca/0x1d8
[ 0.111820] [<ffffffff8071ebea>] driver_register+0x3e/0xdc
[ 0.111827] [<ffffffff8071fde4>] __platform_driver_register+0x1c/0x24
[ 0.111834] [<ffffffff80c2ee0a>] k1_ccu_driver_init+0x1a/0x24
[ 0.111843] [<ffffffff8000f8aa>] do_one_initcall+0x4e/0x1b8
[ 0.111849] [<ffffffff80c012ac>] kernel_init_freeable+0x264/0x2e4
[ 0.111858] [<ffffffff80b761b8>] kernel_init+0x1c/0x144
[ 0.111862] [<ffffffff800111b6>] ret_from_fork_kernel+0xe/0x60
[ 0.111870] [<ffffffff80b8081e>] ret_from_fork_kernel_asm+0x16/0x18
[ 0.111877] ---[ end trace 0000000000000000 ]---

  Is this expected?
Cheers
Michael.

-- 
Michael Opdenacker
Root Commit
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