linux-kernel - Re: [PATCH 03/13] KVM: MMU: split FNAME(prefetch_invalid

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Message-ID: <4F752DB0.6060309@linux.vnet.ibm.com>
Date:	Fri, 30 Mar 2012 11:51:12 +0800
From:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 03/13] KVM: MMU: split FNAME(prefetch_invalid_gpte)

On 03/29/2012 09:00 PM, Avi Kivity wrote:

> On 03/29/2012 11:22 AM, Xiao Guangrong wrote:
>> Split FNAME(prefetch_invalid_gpte) to check gpte independently which will
>> be used in the later patch
>>
>>
>> -static bool FNAME(prefetch_invalid_gpte)(struct kvm_vcpu *vcpu,
>> -				    struct kvm_mmu_page *sp, u64 *spte,
>> -				    pt_element_t gpte)
>> +static bool FNAME(invalid_gpte)(struct kvm_vcpu *vcpu, pt_element_t gpte)
>>  {
>>  	if (is_rsvd_bits_set(&vcpu->arch.mmu, gpte, PT_PAGE_TABLE_LEVEL))
>> -		goto no_present;
>> +		return true;
>>
>>  	if (!is_present_gpte(gpte))
>> -		goto no_present;
>> +		return true;
>>
>>  	if (!(gpte & PT_ACCESSED_MASK))
>> -		goto no_present;
>> +		return true;
>>
>>  	return false;
> 
> A comment (or a name change) is needed to indicate that we're not
> checking for an invalid gpte, just invalid for caching in an spte.


Yes, i will change the name to FNAME(is_cacheable_gpte) and and some
comments.

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