On Mon Oct 27, 2025 at 5:45 PM CET, Bjorn Andersson wrote:
> On Thu, Oct 09, 2025 at 11:06:33AM +0200, Luca Weiss wrote:
>> From: Alexander Martinz <[email protected]>
>>
>> It seems we also need to reserve a region of 81 MiB called "removed_mem"
>> otherwise we can easily hit memory errors with higher RAM usage.
>>
>
> If you make sure CONFIG_MEMTEST is enabled, you can boot with memtest=1
> on the command line to catch such issues, without relying on "higher RAM
> usage" (or randomness).
Good idea, ran it now and no issue seen.
[ 0.000000] Machine model: SHIFT SHIFTphone 8
<...>
[ 0.000000] early_memtest: # of tests: 1
[ 0.000000] 0x0000000080880000 - 0x0000000080884000 pattern
0000000000000000
[ 0.000000] 0x0000000080894000 - 0x00000000808ff000 pattern
0000000000000000
[ 0.000000] 0x0000000081800000 - 0x0000000086700000 pattern
0000000000000000
[ 0.000000] 0x000000008ad00000 - 0x000000008b200000 pattern
0000000000000000
[ 0.000000] 0x000000008b710000 - 0x000000008b71a000 pattern
0000000000000000
[ 0.000000] 0x000000008b71c000 - 0x000000008b800000 pattern
0000000000000000
[ 0.000000] 0x000000009c700000 - 0x00000000a0080000 pattern
0000000000000000
[ 0.000000] 0x00000000a18b0000 - 0x00000000af41e000 pattern
0000000000000000
[ 0.000000] 0x00000000af43fe53 - 0x00000000af61f000 pattern
0000000000000000
[ 0.000000] 0x00000000affff000 - 0x00000000b7100000 pattern
0000000000000000
[ 0.000000] 0x00000000c5100000 - 0x00000000e1000000 pattern
0000000000000000
[ 0.000000] 0x00000000e3300000 - 0x00000000f8500000 pattern
0000000000000000
[ 0.000000] 0x00000000f8b00000 - 0x000000037e857c78 pattern
0000000000000000
[ 0.000000] 0x000000037e857ca7 - 0x000000037e857ca8 pattern
0000000000000000
[ 0.000000] 0x000000037e857cd7 - 0x000000037e857cd8 pattern
0000000000000000
[ 0.000000] 0x000000037e857d04 - 0x000000037e857d08 pattern
0000000000000000
[ 0.000000] 0x000000037e857d34 - 0x000000037e857d38 pattern
0000000000000000
[ 0.000000] 0x000000037e857d64 - 0x000000037e857d68 pattern
0000000000000000
[ 0.000000] 0x000000037e857d94 - 0x000000037e857d98 pattern
0000000000000000
[ 0.000000] 0x000000037e857dc4 - 0x000000037e857dc8 pattern
0000000000000000
[ 0.000000] 0x000000037e857df4 - 0x000000037e857df8 pattern
0000000000000000
[ 0.000000] 0x000000037e857e24 - 0x000000037e857e28 pattern
0000000000000000
[ 0.000000] 0x000000037e857e54 - 0x000000037e857e58 pattern
0000000000000000
[ 0.000000] 0x000000037e857e84 - 0x000000037e857e88 pattern
0000000000000000
[ 0.000000] 0x000000037e857eb4 - 0x000000037e857eb8 pattern
0000000000000000
[ 0.000000] 0x000000037e857ee4 - 0x000000037e857ee8 pattern
0000000000000000
[ 0.000000] 0x000000037e857f14 - 0x000000037e857f18 pattern
0000000000000000
[ 0.000000] 0x000000037e857f44 - 0x000000037e857f48 pattern
0000000000000000
[ 0.000000] 0x000000037e857f74 - 0x000000037e857f78 pattern
0000000000000000
[ 0.000000] 0x000000037e857fa4 - 0x000000037e857fa8 pattern
0000000000000000
[ 0.000000] 0x000000037e857fd4 - 0x000000037e857fd8 pattern
0000000000000000
[ 0.000000] 0x000000037e858004 - 0x000000037e858008 pattern
0000000000000000
[ 0.000000] 0x000000037e858034 - 0x000000037e858038 pattern
0000000000000000
[ 0.000000] 0x000000037e858064 - 0x000000037e858068 pattern
0000000000000000
[ 0.000000] 0x000000037e858094 - 0x000000037e858098 pattern
0000000000000000
[ 0.000000] 0x000000037e8580c4 - 0x000000037e8580c8 pattern
0000000000000000
[ 0.000000] 0x000000037e8580f4 - 0x000000037e8580f8 pattern
0000000000000000
[ 0.000000] 0x000000037e858124 - 0x000000037e858128 pattern
0000000000000000
[ 0.000000] 0x000000037e858154 - 0x000000037e858158 pattern
0000000000000000
[ 0.000000] 0x000000037e858184 - 0x000000037e858188 pattern
0000000000000000
[ 0.000000] 0x000000037e8581b4 - 0x000000037e8581b8 pattern
0000000000000000
[ 0.000000] 0x000000037e8581e4 - 0x000000037e8581e8 pattern
0000000000000000
[ 0.000000] 0x000000037e858214 - 0x000000037e858218 pattern
0000000000000000
[ 0.000000] 0x000000037e858244 - 0x000000037e858248 pattern
0000000000000000
[ 0.000000] 0x000000037e858274 - 0x000000037e858278 pattern
0000000000000000
[ 0.000000] 0x000000037e8582a4 - 0x000000037e8582a8 pattern
0000000000000000
[ 0.000000] 0x000000037e8582d4 - 0x000000037e8582d8 pattern
0000000000000000
[ 0.000000] 0x000000037e858304 - 0x000000037e858308 pattern
0000000000000000
[ 0.000000] 0x000000037e858334 - 0x000000037e858338 pattern
0000000000000000
Regards
Luca
>
> Regards,
> Bjorn
>
>> Fixes: 249666e34c24 ("arm64: dts: qcom: add QCM6490 SHIFTphone 8")
>> Signed-off-by: Alexander Martinz <[email protected]>
>> Reviewed-by: Konrad Dybcio <[email protected]>
>> Signed-off-by: Luca Weiss <[email protected]>
>> ---
>> arch/arm64/boot/dts/qcom/qcm6490-shift-otter.dts | 5 +++++
>> 1 file changed, 5 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/qcm6490-shift-otter.dts
>> b/arch/arm64/boot/dts/qcom/qcm6490-shift-otter.dts
>> index 0d331bda4a82..31650c29b1ca 100644
>> --- a/arch/arm64/boot/dts/qcom/qcm6490-shift-otter.dts
>> +++ b/arch/arm64/boot/dts/qcom/qcm6490-shift-otter.dts
>> @@ -118,6 +118,11 @@ cdsp_mem: cdsp@88f00000 {
>> no-map;
>> };
>>
>> + removed_mem: removed@c0000000 {
>> + reg = <0x0 0xc0000000 0x0 0x5100000>;
>> + no-map;
>> + };
>> +
>> rmtfs_mem: rmtfs@f8500000 {
>> compatible = "qcom,rmtfs-mem";
>> reg = <0x0 0xf8500000 0x0 0x600000>;
>>
>> --
>> 2.51.0
>>
