Re: [PATCH v6 1/6] ARM: Add TTBR operator for kasan_init

Florian Fainelli
2019-07-11T16:55:19Z

On 7/2/19 2:03 PM, Linus Walleij wrote:
> Hi Florian!
>
> thanks for your patch!
>
> On Tue, Jun 18, 2019 at 12:11 AM Florian Fainelli <f.fainelli@gmail.com> wrote:
>
>> From: Abbott Liu <liuwenliang@huawei.com>
>>
>> The purpose of this patch is to provide set_ttbr0/get_ttbr0 to
>> kasan_init function. The definitions of cp15 registers should be in
>> arch/arm/include/asm/cp15.h rather than arch/arm/include/asm/kvm_hyp.h,
>> so move them.
>>
>> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
>> Reported-by: Marc Zyngier <marc.zyngier@arm.com>
>> Signed-off-by: Abbott Liu <liuwenliang@huawei.com>
>> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
>
>> +#include <linux/stringify.h>
>
> What is this for? I think it can be dropped.

Indeed, that can be dropped came from an earlier version of the patch.

>
> This stuff adding a whole bunch of accessors:
>
>> +static inline void set_par(u64 val)
>> +{
>> + if (IS_ENABLED(CONFIG_ARM_LPAE))
>> + write_sysreg(val, PAR_64);
>> + else
>> + write_sysreg(val, PAR_32);
>> +}
>
> Can we put that in a separate patch since it is not
> adding any users, so this is a pure refactoring patch for
> the current code?

Sure, that makes sense, first move all definitions, then add helper
functions, finally make use of them.
--
Florian