linux-kernel - Re: [PATCH] doc: kvm: fix return description of KVM_SET

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Date:   Wed, 4 Sep 2019 14:04:14 +0800
From:   Xiaoyao Li <xiaoyao.li@...el.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Jonathan Corbet <corbet@....net>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] doc: kvm: fix return description of KVM_SET_MSRS

On 9/4/2019 12:33 AM, Sean Christopherson wrote:
> On Mon, Sep 02, 2019 at 06:12:14PM +0800, Xiaoyao Li wrote:
> 
> It may seem silly, but a proper changelog would be helpful even here,
> e.g. to explain how and when a positive return value can diverge from the
> number of MSRs specific in struct kvm_msrs.
> 
>> Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
>> ---
>>   Documentation/virt/kvm/api.txt | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/Documentation/virt/kvm/api.txt b/Documentation/virt/kvm/api.txt
>> index 2d067767b617..a2efc19e0f4e 100644
>> --- a/Documentation/virt/kvm/api.txt
>> +++ b/Documentation/virt/kvm/api.txt
>> @@ -586,7 +586,7 @@ Capability: basic
>>   Architectures: x86
>>   Type: vcpu ioctl
>>   Parameters: struct kvm_msrs (in)
>> -Returns: 0 on success, -1 on error
>> +Returns: number of msrs successfully set, -1 on error
> 
> Similar to the changelong comment, it'd be helpful to elaborate on the
> positive return value, e.g.:
> 
>    Returns: number of msrs successfully set (see below), -1 on error
> 
> and then something in the free form text explaining how the ioctl stops
> processing MSRs if setting an MSR fails.
>

Do it in v2, thanks!

>>   Writes model-specific registers to the vcpu.  See KVM_GET_MSRS for the
>>   data structures.
>> -- 
>> 2.19.1
>>