1. 29 Nov, 2018 1 commit
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  5. 22 Jan, 2018 1 commit
    • Leo Yan's avatar
      Hikey960: Enable invalid FIQ handling · b79f7ed0
      Leo Yan authored
      
      
      When some interrupts are configured as group 0 in GICv2, these
      interrupts trigger FIQ signal; this results in the Linux kernel panic
      by reporting log: "Bad mode in FIQ handler detected on CPU0, code
      0x00000000 -- Unknown/Uncategorized".  Unfortunately from kernel side it
      has no permission to read the GIC register for group 0 interrupts so we
      have no chance to get to know which interrupt is configured as secure
      interrupt and cause the kernel panic.
      
      For upper reason, this commit enables FIQ exception handling for
      SPD_none case.  If the system has not enabled SPD the FIQ interrupt is
      trapped into EL3 and the FIQ handler can report the interrupt number so
      we can easily narrow down which FIQ introduce unexpected interrupt.
      After enable SPD we can rely on SPD interrupt route model to handle FIQ.
      Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
      b79f7ed0
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