[PATCH v7 0/7] Relocate U-Boot in the last bank

Marek Vasut marek.vasut at mailbox.org
Tue Jun 23 15:16:19 CEST 2026


On 6/23/26 3:13 PM, Christophe Leroy (CS GROUP) wrote:

Hello Christophe,

> Le 17/06/2026 à 09:48, Ilias Apalodimas a écrit :
>> Hi all, this is v7 of [1][2][3][4][5][6]!
>>
>> There was a discussion recently on the mailing lists regarding our
>> management of memory above ram_top [0]. The tl;dr is that we have two 
>> problems.
>>
>> The first one is that U-Boot always relocates to the top of the first 
>> available
>> bank unless there's special board code to sidestep that. The second is 
>> we don't
>> successfully deal with devices that can only do 32-bit DMA.
>>
>> This patch series deals with the first problem by adding a Kconfig option
>> allowing platforms to relocate to the top of the last discovered bank.
>>
>> It's worth noting that this is easily testable with QEMU
> 
> Following discussion on patch 1/7 in v5, I boot tested this v7 series on 
> one of my powerpc boards. It could start Linux kernel v7.0 without any 
> problem.
> 
> FWIW,
> 
> Tested-by: Christophe Leroy (CS GROUP) <chleroy at kernel.org>
That is really nice, thank you.

Which PPC board did you use ?


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