Re: [PATCH v3 03/10] partitions: Introduce NVIDIA Tegra Partition Table

[Dmitry Osipenko]

24.03.2020 00:35, MichaÅ MirosÅaw ÐÐÑÐÑ:
> On Mon, Mar 23, 2020 at 10:59:52PM +0300, Dmitry Osipenko wrote:
>> 23.03.2020 22:17, MichaÅ MirosÅaw ÐÐÑÐÑ:
>>> On Mon, Mar 23, 2020 at 07:34:24PM +0300, Dmitry Osipenko wrote:
>>>> All NVIDIA Tegra devices use a special partition table format for the
>>>> internal storage partitioning. Most of Tegra devices have GPT partition
>>>> in addition to TegraPT, but some older Android consumer-grade devices do
>>>> not or GPT is placed in a wrong sector, and thus, the TegraPT is needed
>>>> in order to support these devices properly in the upstream kernel. This
>>>> patch adds support for NVIDIA Tegra Partition Table format that is used
>>>> at least by all NVIDIA Tegra20 and Tegra30 devices.
>>>>
>>>> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
>>>> ---
>>>>  arch/arm/mach-tegra/tegra.c   |  54 ++++
>>> [...]
>>>
>>> Please split off this part and make the information available to
>>> userspace (pt_addr + pt_size) if found. This would make it easier
>>> to support use the partition table later in initrd instead.
>>
>> Please clarify what do you mean by "use the partition table later in
>> initrd instead".
> 
> Configure device-mapper to span eMMC boot+data partitions and then ask
> (modified) kpartx to partition the resulting device. All before rootfs
> is mounted and switched to in initrd.

The whole point of this series is to make partition handling generic in
the kernel, avoiding the need to customize anything.