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

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Message-Id: <20120423100002.30893.60584.sendpatchset@codeblue.in.ibm.com>
Date:	Mon, 23 Apr 2012 15:30:02 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	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>,
	Avi Kivity <avi@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	Xen <xen-devel@...ts.xensource.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Sasha Levin <levinsasha928@...il.com>
Subject: [PATCH RFC V6 2/5] kvm : Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration

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;
 }
 

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