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From: Dmitry Osipenko <digetx@gmail.com>
To: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Jens Axboe <axboe@kernel.dk>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	David Heidelberg <david@ixit.cz>,
	Peter Geis <pgwipeout@gmail.com>,
	Stephen Warren <swarren@wwwdotorg.org>,
	Nicolas Chauvet <kwizart@gmail.com>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Billy Laws <blaws05@gmail.com>,
	linux-tegra@vger.kernel.org, linux-block@vger.kernel.org,
	Andrey Danin <danindrey@mail.ru>,
	Gilles Grandou <gilles@grandou.net>,
	Ryan Grachek <ryan@edited.us>,
	linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 03/10] partitions: Introduce NVIDIA Tegra Partition Table
Date: Wed, 25 Mar 2020 03:27:13 +0300
Message-ID: <ff2b5121-0ff7-1494-9184-31ec7f6d2e1a@gmail.com> (raw)
In-Reply-To: <20200324205221.GA22063@qmqm.qmqm.pl>

24.03.2020 23:52, Michał Mirosław пишет:
> On Tue, Mar 24, 2020 at 02:22:34AM +0300, Dmitry Osipenko wrote:
>> 24.03.2020 00:35, Michał Mirosław пишет:
>>> On Mon, Mar 23, 2020 at 10:59:52PM +0300, Dmitry Osipenko wrote:
>>>> 23.03.2020 22:17, Michał Mirosław пишет:
>>>>> 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@gmail.com>
>>>>>> ---
>>>>>>  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.
> 
> Yes, but at least for diagnostic purposes, it would be nice to have the
> values from BCT exposed somewhere in /sys.

It could be useful indeed, but for now I'm not sure that it should be a
part of this patchset. I'll keep it mind, thank you for the suggestion.

  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 16:34 [PATCH v3 00/10] " Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 01/10] mmc: core: Add raw_boot_mult field to mmc_ext_csd Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 02/10] mmc: block: Add mmc_bdev_to_card() helper Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 03/10] partitions: Introduce NVIDIA Tegra Partition Table Dmitry Osipenko
2020-03-23 19:17   ` Michał Mirosław
2020-03-23 19:59     ` Dmitry Osipenko
2020-03-23 21:35       ` Michał Mirosław
2020-03-23 23:22         ` Dmitry Osipenko
2020-03-24 20:52           ` Michał Mirosław
2020-03-25  0:27             ` Dmitry Osipenko [this message]
2020-03-23 16:34 ` [PATCH v3 04/10] block: Introduce GENHD_FL_PART_SCAN_ONCE Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 05/10] mmc: block: Add mmc_bdev_to_part_type() helper Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 06/10] mmc: block: Add mmc_bdev_to_area_type() helper Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 07/10] mmc: block: Add MMC_QUIRK_RESCAN_MAIN_BLKDEV Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 08/10] mmc: block: Support partition-table scanning on boot partitions Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 09/10] mmc: sdhci-tegra: Enable boot partitions scanning on Tegra20 and Tegra30 Dmitry Osipenko
2020-03-23 16:34 ` [PATCH v3 10/10] partitions/tegra: Implement eMMC boot partitions scanning Dmitry Osipenko
2020-03-23 16:49 ` [PATCH v3 00/10] Introduce NVIDIA Tegra Partition Table Dmitry Osipenko
2020-03-23 18:07 ` Michał Mirosław
2020-03-23 19:44   ` Dmitry Osipenko

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