Re: [PATCH 5/6] arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register

[Anshuman Khandual]

On 03/20/2020 11:49 PM, Suzuki K Poulose wrote:
> On 01/28/2020 12:39 PM, Anshuman Khandual wrote:
>> ID_DFR0 based TraceFilt feature should not be exposed.
> 
> ... to guests.
> 
> ÂHence lets drop it.

Sure, will do.

> 
> Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> 
>>
>> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
>> Cc: Will Deacon <will@xxxxxxxxxx>
>> Cc: James Morse <james.morse@xxxxxxx>
>> Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
>> Cc: Marc Zyngier <maz@xxxxxxxxxx>
>> Cc: Mark Rutland <mark.rutland@xxxxxxx>
>> Cc: linux-kernel@xxxxxxxxxxxxxxx
>> Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
>> ---
>> Â arch/arm64/kernel/cpufeature.c | 1 -
>> Â 1 file changed, 1 deletion(-)
>>
>> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
>> index 2726bd6441da..a8ded1f0eeaf 100644
>> --- a/arch/arm64/kernel/cpufeature.c
>> +++ b/arch/arm64/kernel/cpufeature.c
>> @@ -374,7 +374,6 @@ static const struct arm64_ftr_bits ftr_id_pfr2[] = {
>> Â };
>> Â Â static const struct arm64_ftr_bits ftr_id_dfr0[] = {
>> -ÂÂÂ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0),
>> ÂÂÂÂÂ S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0xf),ÂÂÂ /* PerfMon */
>> ÂÂÂÂÂ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0),
>> ÂÂÂÂÂ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 16, 4, 0),
>>
> 
> 
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