Re: WARNING: CPU: 1 PID: 83 at arch/x86/kernel/cpu/sgx/main.c:446 ksgxd+0x1b7/0x1d0

[Dave Hansen]

On 8/23/22 15:33, Paul Menzel wrote:
>> Thanks for the extra debug info.  Unfortunately, nothing is really
>> sticking out as an obvious problem.
>>
>> The EREMOVE return codes would be interesting to know, as well as an
>> idea what the physical addresses are that fail and the _counts_ of how
>> many pages get sanitized versus fail.
> 
> Is there a knob to print out this information? Or way to get this
> information using ftrace? I’d like to avoid rebuilding the Linux kernel.

You can probably do it with a kprobe and ftrace, but it's a little bit
of a pain since the ENCL* instructions are all inlined and don't get
wrapped in actual function calls.

I'd just rebuild the kernel if it were me.

Maybe we just just uninline all of the ENCL* instruction so that we
*can* more easily trace them.  It's not like they are performance sensitive.