linux-kernel - Re: [PATCH 05/13] KVM: x86: pass host_initiated to functions that read MSRs

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Message-ID: <55479895.4030400@redhat.com>
Date:	Mon, 04 May 2015 18:04:37 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Radim Krčmář <rkrcmar@...hat.com>
CC:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org, bsd@...hat.com,
	guangrong.xiao@...ux.intel.com,
	Yang Zhang <yang.z.zhang@...el.com>, wanpeng.li@...ux.intel.com
Subject: Re: [PATCH 05/13] KVM: x86: pass host_initiated to functions that
 read MSRs



On 04/05/2015 16:01, Radim Krčmář wrote:
>>  static int emulator_get_msr(struct x86_emulate_ctxt *ctxt,
>>  			    u32 msr_index, u64 *pdata)
>>  {
>> -	return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata);
>> +	struct msr_data msr;
>> +	int r;
>> +
>> +	msr.index = msr_index;
>> +	msr.host_initiated = false;
>> +	r = kvm_get_msr(emul_to_vcpu(ctxt), &msr);
>> +	if (r)
>> +		return r;
>> +
>> +	*pdata = msr.data;
>> +	return 0;
>>  }
> 
> (Only msr.host_initiated changed from do_get_msr() ...
>  I'd add a function with an extra bool arg and call it twice.)

True, but the same situation is there already for do_set_msr vs.
emulator_set_msr

Paolo
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