linux-kernel - Re: [PATCH] kvm: selftests: Support dirty log initial-all-set test

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Date:   Tue, 3 Mar 2020 11:14:34 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     "Zhoujian (jay)" <jianjay.zhou@...wei.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
Cc:     "peterx@...hat.com" <peterx@...hat.com>,
        "shuah@...nel.org" <shuah@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "wangxin (U)" <wangxinxin.wang@...wei.com>,
        "Huangweidong (C)" <weidong.huang@...wei.com>,
        "Liujinsong (Paul)" <liu.jinsong@...wei.com>
Subject: Re: [PATCH] kvm: selftests: Support dirty log initial-all-set test

On 03/03/20 11:00, Zhoujian (jay) wrote:
> 
> 
>> -----Original Message-----
>> From: Paolo Bonzini [mailto:pbonzini@...hat.com]
>> Sent: Tuesday, March 3, 2020 4:54 PM
>> To: Zhoujian (jay) <jianjay.zhou@...wei.com>; kvm@...r.kernel.org
>> Cc: peterx@...hat.com; shuah@...nel.org; linux-kselftest@...r.kernel.org;
>> linux-kernel@...r.kernel.org; wangxin (U) <wangxinxin.wang@...wei.com>;
>> Huangweidong (C) <weidong.huang@...wei.com>; Liujinsong (Paul)
>> <liu.jinsong@...wei.com>
>> Subject: Re: [PATCH] kvm: selftests: Support dirty log initial-all-set test
>>
>> On 03/03/20 09:07, Jay Zhou wrote:
>>>  #ifdef USE_CLEAR_DIRTY_LOG
>>> -	if (!kvm_check_cap(KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2)) {
>>> -		fprintf(stderr, "KVM_CLEAR_DIRTY_LOG not available, skipping
>> tests\n");
>>> +	dirty_log_manual_caps =
>>> +		kvm_check_cap(KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2);
>>> +	if (!dirty_log_manual_caps) {
>>> +		fprintf(stderr, "KVM_CLEAR_DIRTY_LOG not available, "
>>> +				"skipping tests\n");
>>> +		exit(KSFT_SKIP);
>>> +	}
>>> +	if (dirty_log_manual_caps != KVM_DIRTY_LOG_MANUAL_CAPS &&
>>> +		dirty_log_manual_caps !=
>> KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE) {
>>> +		fprintf(stderr, "KVM_CLEAR_DIRTY_LOG not valid caps "
>>> +				"%"PRIu64", skipping tests\n",
>>> +				dirty_log_manual_caps);
>>>  		exit(KSFT_SKIP);
>>>  	}
>>>  #endif
>>>
>>
>> Thanks, instead of this final "if" it should be enough to do
>>
>> 	dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE
>> |
>> 				  KVM_DIRTY_LOG_INITIALLY_SET);
>>
>>
>> Otherwise looks good, I'll test it and eventually apply both patches.
> 
> Do I need to resubmit this patch with this modification?

No, thanks.

Paolo