[PATCH 18/60] kvm: Move kvm_vcpu->rcuwait to struct kvm_vcpu_common

[Jörg Rödel]

From: Joerg Roedel <joerg.roedel@xxxxxxx>

The rcuwait member is used to block and wake a VCPU thread. Since all
plane VCPUs share a thread, there must only be a single wait object.

Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
 arch/loongarch/kvm/timer.c | 2 +-
 arch/mips/kvm/mips.c       | 4 ++--
 include/linux/kvm_host.h   | 9 +++++----
 virt/kvm/kvm_main.c        | 7 ++++---
 4 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/arch/loongarch/kvm/timer.c b/arch/loongarch/kvm/timer.c
index 8356fce0043f..9da10aa90558 100644
--- a/arch/loongarch/kvm/timer.c
+++ b/arch/loongarch/kvm/timer.c
@@ -31,7 +31,7 @@ enum hrtimer_restart kvm_swtimer_wakeup(struct hrtimer *timer)
 
 	vcpu = container_of(timer, struct kvm_vcpu, arch.swtimer);
 	kvm_queue_irq(vcpu, INT_TI);
-	rcuwait_wake_up(&vcpu->wait);
+	rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu));
 
 	return HRTIMER_NORESTART;
 }
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index f928ba105104..6469ec246dd6 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -265,7 +265,7 @@ static enum hrtimer_restart kvm_mips_comparecount_wakeup(struct hrtimer *timer)
 	kvm_mips_callbacks->queue_timer_int(vcpu);
 
 	vcpu->arch.wait = 0;
-	rcuwait_wake_up(&vcpu->wait);
+	rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu));
 
 	return kvm_mips_count_timeout(vcpu);
 }
@@ -507,7 +507,7 @@ int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
 
 	dvcpu->arch.wait = 0;
 
-	rcuwait_wake_up(&dvcpu->wait);
+	rcuwait_wake_up(kvm_arch_vcpu_get_wait(dvcpu));
 
 	return 0;
 }
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index c8085c23e18e..c08ede1cefd2 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -337,6 +337,10 @@ struct kvm_vcpu_common {
 #endif
 	struct mutex mutex;
 
+#ifndef __KVM_HAVE_ARCH_WQP
+	struct rcuwait wait;
+#endif
+
 	/* Scheduling state */
 #ifdef CONFIG_PREEMPT_NOTIFIERS
 	struct preempt_notifier preempt_notifier;
@@ -361,9 +365,6 @@ struct kvm_vcpu {
 
 	struct kvm_run *run;
 
-#ifndef __KVM_HAVE_ARCH_WQP
-	struct rcuwait wait;
-#endif
 	struct pid *pid;
 	rwlock_t pid_lock;
 	int sigset_active;
@@ -1806,7 +1807,7 @@ static inline struct rcuwait *kvm_arch_vcpu_get_wait(struct kvm_vcpu *vcpu)
 #ifdef __KVM_HAVE_ARCH_WQP
 	return vcpu->arch.waitp;
 #else
-	return &vcpu->wait;
+	return &vcpu->common->wait;
 #endif
 }
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 9accca10c249..11e0d4af82df 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -468,6 +468,10 @@ static int kvm_vcpu_init_common(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned
 
 	mutex_init(&common->mutex);
 
+#ifndef __KVM_HAVE_ARCH_WQP
+	rcuwait_init(&common->wait);
+#endif
+
 	common->kvm = kvm;
 	common->current_vcpu = vcpu;
 
@@ -508,9 +512,6 @@ static void kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
 	vcpu->vcpu_id = id;
 	vcpu->pid = NULL;
 	rwlock_init(&vcpu->pid_lock);
-#ifndef __KVM_HAVE_ARCH_WQP
-	rcuwait_init(&vcpu->wait);
-#endif
 	kvm_async_pf_vcpu_init(vcpu);
 
 	kvm_vcpu_set_in_spin_loop(vcpu, false);
-- 
2.53.0