ARMv8: Allowing user space to perform cache-maintenance

[Rajan Srivastava]

I am referring to ARM for ARMv8-A, "ARM DDI 0487A.a_errata_2013_Q3 (ID100313)", section D8.2.79 'System Control Register (EL1)'.

Thanks,
Rajan


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> Date: Wed, 30 Apr 2014 11:58:20 +0100
> From: catalin.marinas at arm.com
> To: rajan_srivastava at hotmail.com
> CC: linaro-kernel at lists.linaro.org; linux-arm-kernel at lists.infradead.org
> Subject: Re: ARMv8: Allowing user space to perform cache-maintenance
>
> On Wed, Apr 30, 2014 at 02:01:38PM +0530, Rajan Srivastava wrote:
>> ARMv8 allows AArch64-EL0 to execute cache maintenance instructions
>> (eg, by setting SCTLR_EL1.UCI). It looks like the current ARMv8 kernel
>> doesn't support the above feature.
>
> Where have you looked and came up to this conclusion?
>
> --
> Catalin