linux-kernel - Re: [PATCH 12/15] KVM: MTRR: introduce mtrr_for_each_mem

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Date:	Wed, 03 Jun 2015 10:57:30 +0800
From:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
CC:	gleb@...nel.org, mtosatti@...hat.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/15] KVM: MTRR: introduce mtrr_for_each_mem_type



On 06/01/2015 10:26 PM, Paolo Bonzini wrote:
>
>
> On 01/06/2015 11:33, Paolo Bonzini wrote:
>>> +	looker->mem_type = looker->mtrr_state->fixed_ranges[index];
>>>> +	looker->start = fixed_mtrr_range_end_addr(seg, index);
>>>> +	return true;
>> in mtrr_lookup_fixed_start is the same as this:
>>
>>>>
>>>> +	end = fixed_mtrr_range_end_addr(looker->seg, looker->index);
>>>> +
>>>> +	/* switch to next segment. */
>>>> +	if (end >= eseg->end) {
>>>> +		looker->seg++;
>>>> +		looker->index = 0;
>>>> +
>>>> +		/* have looked up for all fixed MTRRs. */
>>>> +		if (looker->seg >= ARRAY_SIZE(fixed_seg_table))
>>>> +			return mtrr_lookup_var_start(looker);
>>>> +
>>>> +		end = fixed_mtrr_range_end_addr(looker->seg, looker->index);
>>>> +	}
>>>> +
>>>> +	looker->mem_type = mtrr_state->fixed_ranges[looker->index];
>>>> +	looker->start = end;
>> in mtrr_lookup_fixed_next.  Can you try to make them more common?
>>
>> Basically you should have
>>
>> +#define mtrr_for_each_mem_type(_looker_, _mtrr_, _gpa_start_, _gpa_end_) \
>> +	for (mtrr_lookup_init(_looker_, _mtrr_, _gpa_start_, _gpa_end_); \
>> +	     !mtrr_lookup_end(_looker_); mtrr_lookup_next(_looker_))
>
> ... where the above code I quoted would be part of mtrr_lookup_end.

Okay, will do. :)
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