linux-kernel - Re: [PATCH RFC V6 2/5] kvm : Fold pv_unhalt flag into GET_MP

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Message-ID: <4F9E4328.6060000@linux.vnet.ibm.com>
Date:	Mon, 30 Apr 2012 13:15:44 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alexander Graf <agraf@...e.de>,
	Randy Dunlap <rdunlap@...otime.net>, linux-doc@...r.kernel.org,
	KVM <kvm@...r.kernel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	X86 <x86@...nel.org>, Gleb Natapov <gleb@...hat.com>,
	Virtualization <virtualization@...ts.linux-foundation.org>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Xen <xen-devel@...ts.xensource.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Sasha Levin <levinsasha928@...il.com>
Subject: Re: [PATCH RFC V6 2/5] kvm : Fold pv_unhalt flag into GET_MP_STATE
 ioctl to aid migration

On 04/29/2012 06:57 PM, Avi Kivity wrote:
> On 04/23/2012 01:00 PM, Raghavendra K T wrote:
>> From: Raghavendra K T<raghavendra.kt@...ux.vnet.ibm.com>
>>
>> Signed-off-by: Raghavendra K T<raghavendra.kt@...ux.vnet.ibm.com>
>> ---
>> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>> index 6faa550..7354c1b 100644
>> --- a/arch/x86/kvm/x86.c
>> +++ b/arch/x86/kvm/x86.c
>> @@ -5691,7 +5691,9 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
>>   int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
>>   				    struct kvm_mp_state *mp_state)
>>   {
>> -	mp_state->mp_state = vcpu->arch.mp_state;
>> +	mp_state->mp_state = (vcpu->arch.mp_state == KVM_MP_STATE_HALTED&&
>> +				vcpu->arch.pv.pv_unhalted) ?
>> +	KVM_MP_STATE_RUNNABLE : vcpu->arch.mp_state;
>>   	return 0;
>>   }
>
> Not pretty.  Suggest rewriting using an if.
>

Ok.. 'll rewrite.

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