linux-kernel - [PATCH v2 4/7] KVM: export kvm_kick_vcpu for pv

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Message-ID: <20120604050730.4560.98650.stgit@abhimanyu.in.ibm.com>
Date:	Mon, 04 Jun 2012 10:37:50 +0530
From:	"Nikunj A. Dadhania" <nikunj@...ux.vnet.ibm.com>
To:	peterz@...radead.org, mingo@...e.hu, mtosatti@...hat.com,
	avi@...hat.com
Cc:	raghukt@...ux.vnet.ibm.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, x86@...nel.org, jeremy@...p.org,
	vatsa@...ux.vnet.ibm.com, hpa@...or.com
Subject: [PATCH v2 4/7] KVM: export kvm_kick_vcpu for pv_flush


Signed-off-by: Nikunj A. Dadhania <nikunj@...ux.vnet.ibm.com>
---
 arch/x86/include/asm/kvm_para.h |    4 ++++
 arch/x86/kernel/kvm.c           |   18 +++++++++---------
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 684a285..651a305 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -206,6 +206,7 @@ void kvm_async_pf_task_wait(u32 token);
 void kvm_async_pf_task_wake(u32 token);
 u32 kvm_read_and_reset_pf_reason(void);
 extern void kvm_disable_steal_time(void);
+void kvm_kick_cpu(int cpu);
 
 #ifdef CONFIG_PARAVIRT_SPINLOCKS
 void __init kvm_spinlock_init(void);
@@ -229,6 +230,9 @@ static inline void kvm_disable_steal_time(void)
 {
 	return;
 }
+
+#define kvm_kick_cpu(T) do {} while (0)
+
 #endif
 
 #endif /* __KERNEL__ */
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 66db54e..5943285 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -487,6 +487,15 @@ static __init int activate_jump_labels(void)
 }
 arch_initcall(activate_jump_labels);
 
+/* Kick a cpu */
+void kvm_kick_cpu(int cpu)
+{
+	int apicid;
+
+	apicid = per_cpu(x86_cpu_to_apicid, cpu);
+	kvm_hypercall1(KVM_HC_KICK_CPU, apicid);
+}
+
 #ifdef CONFIG_PARAVIRT_SPINLOCKS
 
 enum kvm_contention_stat {
@@ -695,15 +704,6 @@ out:
 }
 PV_CALLEE_SAVE_REGS_THUNK(kvm_lock_spinning);
 
-/* Kick a cpu by its apicid*/
-static inline void kvm_kick_cpu(int cpu)
-{
-	int apicid;
-
-	apicid = per_cpu(x86_cpu_to_apicid, cpu);
-	kvm_hypercall1(KVM_HC_KICK_CPU, apicid);
-}
-
 /* Kick vcpu waiting on @lock->head to reach value @ticket */
 static void kvm_unlock_kick(struct arch_spinlock *lock, __ticket_t ticket)
 {

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