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Will Deacon 86ba5fdc76 arm64: cpufeature: Fix feature comparison for CTR_EL0.{CWG,ERG}

commit 147b9635e6 upstream.

If CTR_EL0.{CWG,ERG} are 0b0000 then they must be interpreted to have
their architecturally maximum values, which defeats the use of
FTR_HIGHER_SAFE when sanitising CPU ID registers on heterogeneous
machines.

Introduce FTR_HIGHER_OR_ZERO_SAFE so that these fields effectively
saturate at zero.

Fixes: 3c739b5710 ("arm64: Keep track of CPU feature registers")
Cc: <stable@vger.kernel.org> # 4.4.x-
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-08-09 17:53:32 +02:00

alpha

…

arc

ARC: hide unused function unw_hdr_alloc

2019-07-21 09:04:41 +02:00

arm

ARM: dts: Add pinmuxing for i2c2 and i2c3 for LogicPD torpedo

2019-08-09 17:53:32 +02:00

arm64

arm64: cpufeature: Fix feature comparison for CTR_EL0.{CWG,ERG}

2019-08-09 17:53:32 +02:00