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docs: Update documentation to reflect what TAINT_CPU_OUT_OF_SPEC means

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Here's a patch updating the meaning of TAINT_CPU_OUT_OF_SPEC after
Borislav introduced changes in a7e1f67ed2 and upcoming patches in tip.

TAINT_CPU_OUT_OF_SPEC now means a bit more what it implies as the
flag isn't set just because of a CPU misconfiguration or mismatch.
Historically it was for SMP kernel oops on an officially SMP incapable
processor but now it also covers CPUs whose MSRs have been incorrectly
poked at from userspace, drivers being used on non supported
architectures, broken firmware, mismatched CPUs, ...

Update documentation and script to reflect that.

Signed-off-by: Mathieu Chouquet-Stringer <me@mathieu.digital>
Link: https://lore.kernel.org/r/20201202153244.709752-1-me@mathieu.digital
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mathieu Chouquet-Stringer
2020-12-02 16:32:43 +01:00
committed by Jonathan Corbet
parent 907d1f143b
commit 547f574fd9
3 changed files with 20 additions and 7 deletions
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2
tools/debugging/kernel-chktaint
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@@ -72,7 +72,7 @@ if [ `expr $T % 2` -eq 0 ]; then
addout " "
else
addout "S"
echo " * SMP kernel oops on an officially SMP incapable processor (#2)"
echo " * kernel running on an out of specification system (#2)"
fi
T=`expr $T / 2`