ARM: 8318/1: treat CPU feature register fields as signed quantities

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The various CPU feature registers consist of 4-bit blocks that
represent signed quantities, whose positive values represent
incremental features, and whose negative values are reserved.

To improve forward compatibility, update the feature detection
code to take possible future higher values into account, but
ignore negative values.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Ard Biesheuvel 2015-03-19 19:03:25 +01:00 • committed by Russell King

parent eb765c1ceb

commit b8c9592b4a

2 changed files with 25 additions and 13 deletions

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16

arch/arm/include/asm/cputype.h

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22

arch/arm/kernel/setup.c

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