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Message-ID: <2b04eac1-b0e1-ec70-34dd-5bd64af8ada2@arm.com>
Date: Thu, 2 Apr 2020 08:30:25 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
linux-arm-kernel@...ts.infradead.org
Cc: mark.rutland@....com, catalin.marinas@....com,
linux-kernel@...r.kernel.org, james.morse@....com, maz@...nel.org,
will@...nel.org
Subject: Re: [PATCH 5/6] arm64/cpufeature: Drop TraceFilt feature exposure
from ID_DFR0 register
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.
>
> Hence lets drop it.
Sure, will do.
>
> Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>
>
>>
>> Cc: Catalin Marinas <catalin.marinas@....com>
>> Cc: Will Deacon <will@...nel.org>
>> Cc: James Morse <james.morse@....com>
>> Cc: Suzuki K Poulose <suzuki.poulose@....com>
>> Cc: Marc Zyngier <maz@...nel.org>
>> Cc: Mark Rutland <mark.rutland@....com>
>> Cc: linux-kernel@...r.kernel.org
>> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
>> ---
>> arch/arm64/kernel/cpufeature.c | 1 -
>> 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[] = {
>> };
>> static const struct arm64_ftr_bits ftr_id_dfr0[] = {
>> - ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0),
>> S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0xf), /* PerfMon */
>> ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0),
>> ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 16, 4, 0),
>>
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
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