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authorDaniel Axtens <dja@axtens.net>2019-06-27 15:30:08 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2019-08-22 23:12:48 +1000
commit7e04a46d84f73ef0f21d2257d6ba2a194c0f1511 (patch)
treefcd8106a218f3803ed52e2d15df8fc33faf4724c /tools/testing/selftests/powerpc/mm/subpage_prot.c
parentb8baa05a0e505f8311fb03f5c72e75fa0e13fd95 (diff)
powerpc/configs: Disable /dev/port in skiroot defconfig
While reviewing lockdown patches, I discovered that we still enable /dev/port (CONFIG_DEVPORT) in skiroot. /dev/port is used for old x86 style IO accesses. It's set up in drivers/char/mem.c, and is only created if arch_has_dev_port() returns true. Per arch/powerpc/include/asm/io.h, on PPC64 with PCI, this is only true if there's a legacy ISA bridge. Even if a system has a legacy ISA bridge installed, we have no business accessing it in skiroot. Deselect CONFIG_DEVPORT for skiroot. Signed-off-by: Daniel Axtens <dja@axtens.net> [mpe: Incorporate emailed comments into the change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190627053008.29315-1-dja@axtens.net
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