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    SubjectRe: [PATCH 1/8] arm64: cpufeature: Relax check for IESB support
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    Hi Will

    On 04/14/2020 10:31 PM, Will Deacon wrote:
    > From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
    >
    > We don't care if IESB is supported or not as we always set
    > SCTLR_ELx.IESB and, if it works, that's really great.
    >
    > Relax the ID_AA64MMFR2.IESB cpufeature check so that we don't warn and
    > taint if it's mismatched.
    >
    > Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
    > [will: rewrote commit message]
    > Signed-off-by: Will Deacon <will@kernel.org>

    Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>

    > ---
    > arch/arm64/kernel/cpufeature.c | 2 +-
    > 1 file changed, 1 insertion(+), 1 deletion(-)
    >
    > diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
    > index 9fac745aa7bb..63df28e6a425 100644
    > --- a/arch/arm64/kernel/cpufeature.c
    > +++ b/arch/arm64/kernel/cpufeature.c
    > @@ -247,7 +247,7 @@ static const struct arm64_ftr_bits ftr_id_aa64mmfr2[] = {
    > ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_FWB_SHIFT, 4, 0),
    > ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_AT_SHIFT, 4, 0),
    > ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_LVA_SHIFT, 4, 0),
    > - ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_IESB_SHIFT, 4, 0),
    > + ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_IESB_SHIFT, 4, 0),
    > ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_LSM_SHIFT, 4, 0),
    > ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_UAO_SHIFT, 4, 0),
    > ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_CNP_SHIFT, 4, 0),
    >

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