T1042 kernel panic while booting secondary crash kernel in __poll_portal_fast function due to invalid memory access of frame queue

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T1042 kernel panic while booting secondary crash kernel in __poll_portal_fast function due to invalid memory access of frame queue

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arnobghosh
Contributor I

While booting secondary crash kernel in T1042 I can see its crashing in __poll_portal_fast due to invalid memory

access for qman_fq.

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arnobghosh
Contributor I

What is the procedure of hard resetting the FMAN while booting secondary kernel.

Please let me know if any FMAN Reg for resetting the FMAN state before booting crash kernel.

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bpe
NXP Employee
NXP Employee

I meant a signal-initiated reset, see T1040RM, Section 4.6.2. There is no way to selectively reset FMAN from a register.


Have a great day,
Platon

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bpe
NXP Employee
NXP Employee

FMAN requires special shutdown procedures to properly deallocate
all resources it was using. If the main kernel crashes, and the state
is lost, there is no way to shutdown FMAN properly, a hard reset is
required. A new attempt to initialize FMAN without
prior shutdown is likely to cause erratic behaviour. The suggestion
here is to completely remove DPAA support from the secondary kernel.


Have a great day,
Platon

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