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taint: Add TAINT_FWCTL

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Requesting a fwctl scope of access that includes mutating device debug
data will cause the kernel to be tainted. Changing the device operation
through things in the debug scope may cause the device to malfunction in
undefined ways. This should be reflected in the TAINT flags to help any
debuggers understand that something has been done.

Link: https://patch.msgid.link/r/4-v5-642aa0c94070+4447f-fwctl_jgg@nvidia.com
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Tested-by: Dave Jiang <dave.jiang@intel.com>
Tested-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe
2025-02-27 20:26:32 -04:00
parent fb39e9092b
commit 8eea4e7447
4 changed files with 16 additions and 1 deletions
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8
tools/debugging/kernel-chktaint
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@@ -204,6 +204,14 @@ else
echo " * an in-kernel test (such as a KUnit test) has been run (#18)"
fi
T=`expr $T / 2`
if [ `expr $T % 2` -eq 0 ]; then
addout " "
else
addout "J"
echo " * fwctl's mutating debug interface was used (#19)"
fi
echo "For a more detailed explanation of the various taint flags see"
echo " Documentation/admin-guide/tainted-kernels.rst in the Linux kernel sources"
echo " or https://kernel.org/doc/html/latest/admin-guide/tainted-kernels.html"