Messages in this thread | | | From | "Verdun, Jean-Marie" <> | Subject | Re: [PATCH] [v1] arch: arm: configs: gxp_defconfig | Date | Wed, 23 Mar 2022 01:01:39 +0000 |
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Hi,
> Unfortunately that is not possible at the moment, as this is a 'bool' > option rather than > a 'tristate'. I don't know if it might be possible to change that, but > this is probably > done for a good reason.
You are right.
> I think it should be possible to detect this erratum at runtime, especially now > that we understand what the hardware issue is.
> We should probably add a CONFIG_ARM_ERRATA_764319 Kconfig > option that controls whether a workaround is enabled or not. One > way that I think this can be handled is to have a custom inline asm > for the trapping register CP14 accesses, using a __ex_table fixup, > similar to what we do for trapping user space memory access.
I like this idea. Let me try to implement it and propose something. Thanks for the feedbacks.
> Another option would be to detect affected systems by the CPU > revision register or from some DT properties.
ARM might be able to provide that. Let me ask them
vejmarie
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