Hi,
As the design proposal submitted beforeŁ¬https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/8033,we
are planning to add a new ETSS partition(External Trusted Secure Storage
partition) which supplies
external secure storage services based
on secure Flash.
To avoid circular dependency,this new
partition needs to access data in external secure Flash on its own rather
than relies on tfm ITS service.
Currently,the ETSS reuses tfm ITS filesystem
as a temporary solution, it needs to share this filesystem between ITS
and ETSS partition to reduce code size.
Should the code sharing between different
SP be the same as the code sharing between mcuboot and tf-m runtime firmware
implemented as this proposal,https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/4587
or other implementations?
Best Regards,
Poppy Wu
Macronix Microelectronics (Suzhou) Co.,Ltd
http://www.mxic.com.cn
| David Hu <David.Hu@arm.com>
2021/05/24 13:48
|
|
To
| Edward Yang <EdwardYang@mxic.com.cn>,
"tf-m@lists.trustedfirmware.org" <tf-m@lists.trustedfirmware.org>
|
|
cc
| nd <nd@arm.com>
|
|
Subject
| RE: [TF-M] A question on tfm its filesystem |
|
Hi Poppy,
SPRT requires the shared library shall
not own static R/W data. ITS filesystem may not satisfy this requirement.
Usually, a SP, for example Protected Storage,
can rely on ITS service to access data in non-volatile memory.
Best regards,
Hu Ziji
From: TF-M <tf-m-bounces@lists.trustedfirmware.org>
On Behalf Of Edward Yang via TF-M
Sent: Monday, May 24, 2021 12:54 PM
To: tf-m@lists.trustedfirmware.org
Subject: [TF-M] A question on tfm its filesystem
Hi,
I'd like to ask a question to see if the filesystem part of tf-m its partition
can be moved to lib/sprt folder,to make this filesystem a shared library
for PRoT part of tfm.
Therefore,besides its partition, other extra secure partitions can also
make use of this filesystem.
Best Regards,
Poppy Wu
Macronix Microelectronics (Suzhou) Co.,Ltd
Http: //www.mxic.com.cn
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