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acpi: Disable ACPI table override if securelevel is set
From the kernel documentation (initrd_table_override.txt): If the ACPI_INITRD_TABLE_OVERRIDE compile option is true, it is possible to override nearly any ACPI table provided by the BIOS with an instrumented, modified one. When securelevel is set, the kernel should disallow any unauthenticated changes to kernel space. ACPI tables contain code invoked by the kernel, so do not allow ACPI tables to be overridden if securelevel is set. Signed-off-by: Linn Crosetto <linn@hpe.com>
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Linn Crosetto
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Matthew Garrett
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Apr 3, 2016
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