linux-kernel - Re: [PATCH v1 1/2] s390/kvm: split kvm_s390_real_to

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Date:   Mon, 22 Mar 2021 10:53:46 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Thomas Huth <thuth@...hat.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        linux-kernel@...r.kernel.org
Cc:     borntraeger@...ibm.com, frankja@...ux.ibm.com, cohuck@...hat.com,
        kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v1 1/2] s390/kvm: split kvm_s390_real_to_abs

On 20.03.21 05:57, Thomas Huth wrote:
> On 19/03/2021 20.33, Claudio Imbrenda wrote:
>> A new function _kvm_s390_real_to_abs will apply prefixing to a real address
>> with a given prefix value.
>>
>> The old kvm_s390_real_to_abs becomes now a wrapper around the new function.
>>
>> This is needed to avoid code duplication in vSIE.
>>
>> Cc: stable@...r.kernel.org
>> Signed-off-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>
>> ---
>>    arch/s390/kvm/gaccess.h | 23 +++++++++++++++++------
>>    1 file changed, 17 insertions(+), 6 deletions(-)
>>
>> diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
>> index daba10f76936..7c72a5e3449f 100644
>> --- a/arch/s390/kvm/gaccess.h
>> +++ b/arch/s390/kvm/gaccess.h
>> @@ -18,17 +18,14 @@
>>    
>>    /**
>>     * kvm_s390_real_to_abs - convert guest real address to guest absolute address
>> - * @vcpu - guest virtual cpu
>> + * @prefix - guest prefix
>>     * @gra - guest real address
>>     *
>>     * Returns the guest absolute address that corresponds to the passed guest real
>> - * address @gra of a virtual guest cpu by applying its prefix.
>> + * address @gra of by applying the given prefix.
>>     */
>> -static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
>> -						 unsigned long gra)
>> +static inline unsigned long _kvm_s390_real_to_abs(u32 prefix, unsigned long gra)
> 
> <bikeshedding>
> Just a matter of taste, but maybe this could be named differently?
> kvm_s390_real2abs_prefix() ? kvm_s390_prefix_real_to_abs()?
> </bikeshedding>

+1, I also dislike these "_.*" style functions here.

Reviewed-by: David Hildenbrand <david@...hat.com>

> 
> Anyway:
> Reviewed-by: Thomas Huth <thuth@...hat.com>
> 


-- 
Thanks,

David / dhildenb