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From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Date: Fri, 23 Mar 2012 13:53:31 +0530
Message-Id: <20120323082310.17193.22446.sendpatchset@codeblue>
In-Reply-To: <20120323082242.17193.16289.sendpatchset@codeblue>
References: <20120323082242.17193.16289.sendpatchset@codeblue>
Subject: [Qemu-devel] [PATCH 1/2] QEMU kvm: Add PV_UNHALT feature support
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To: Avi Kivity <avi@redhat.com>, Jan Kiszka <jan.kiszka@siemens.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, KVM <kvm@vger.kernel.org>, Qemu-devel <qemu-devel@nongnu.org>, Marcelo Tosatti <mtosatti@redhat.com>, Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>, Alexander Graf <agraf@suse.de>

From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>

Extend the KVM Hypervisor to enable PVLOCK_KICK feature that allows
a vcpu to kick the halted vcpu to continue with execution in PV ticket
spinlock.

Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
---
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index e74a9e4..dbebd3a 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -98,6 +98,7 @@ struct kvm_para_features {
     { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY },
     { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP },
     { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF },
+    { KVM_CAP_PV_UNHALT, KVM_FEATURE_PV_UNHALT },
     { -1, -1 }
 };