Thread (15 messages) 15 messages, 5 authors, 2017-12-11

[PATCH 0/2] acpi, x86: Add SPCR table support

From: mingo@kernel.org (Ingo Molnar)
Date: 2017-12-11 14:42:50
Also in: linux-acpi, linux-pm, linux-serial, lkml

* Prarit Bhargava [off-list ref] wrote:
If I disable "Serial Port Console Debug" in my BIOS I still see the SPCR configured:

[root at prarit-lab ~]# dmesg | grep SPCR
[    0.000000] ACPI: SPCR 0x0000000069031000 000050 (v01
00000000      00000000)

AFAICT the SPCR is always enabled on some systems.
Fair enough.
quoted
If so then we should pick up that serial console configuration and activate it, 
regardless of any kernel boot options!
I'm worried about someone who doesn't want a console on ttyS0 suddenly ending up
with one.  The SPCR could contain incorrect data, etc.
Yeah, that's not good.

Thanks,

	Ingo
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