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powerpc/configs: Disable SCOM_DEBUGFS in powernv_defconfig 

SCOM_DEBUGFS is really not needed for anything other than low-level
hardware debugging.

mpe: It also introduces a large and poorly documented/understood
attack surface. Although the interface is only available to root, the
kernel still aspires to restrict root to accessing hardware through
well defined interfaces, which this is not.

opal-prd uses its own interface (/dev/prd) for SCOM access, so it
doesn't need SCOM_DEBUGFS.

At some point in the future we'll introduce a debug config fragment
where this can go instead.

Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190509051119.7694-5-ajd@linux.ibm.com
This commit is contained in:
Andrew Donnellan 2019-05-09 15:11:19 +10:00 committed by Michael Ellerman
parent 8c98db8d58
commit 8b856a0942
1 changed files with 1 additions and 1 deletions
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arch/powerpc/configs/powernv_defconfig
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@ -38,7 +38,7 @@ CONFIG_MODULE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_SCOM_DEBUGFS=y
# CONFIG_SCOM_DEBUGFS is not set
CONFIG_OPAL_PRD=y
CONFIG_PPC_MEMTRACE=y
# CONFIG_PPC_PSERIES is not set