Re: [PATCH] arm64: cpufeature: Fix feature comparison for CTR_EL0.{CWG,ERG}
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2019-07-31 17:12:05
On Tue, Jul 30, 2019 at 03:40:20PM +0100, Will Deacon wrote:
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.
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Fixes: 3c739b571084 ("arm64: Keep track of CPU feature registers")
Signed-off-by: Will Deacon <will@kernel.org>Queued for 5.3-rc3 (with a cc stable tag). Thanks. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel