[PATCH 41/45] KVM: PPC: Move all vcpu init code into kvm_arch_vcpu_create()

From: Sean Christopherson <sean.j.christopherson@intel.com>
To: "Marc Zyngier" <maz@kernel.org>,
	"James Hogan" <jhogan@kernel.org>,
	"Paul Mackerras" <paulus@ozlabs.org>,
	"Christian Borntraeger" <borntraeger@de.ibm.com>,
	"Janosch Frank" <frankja@linux.ibm.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>
Cc: James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	David Hildenbrand <david@redhat.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
	kvm-ppc@vger.kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 41/45] KVM: PPC: Move all vcpu init code into kvm_arch_vcpu_create()
Date: Mon, 21 Oct 2019 18:59:21 -0700	[thread overview]
Message-ID: <20191022015925.31916-42-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20191022015925.31916-1-sean.j.christopherson@intel.com>

Fold init() into create() now that the two are called back-to-back by
common KVM code (kvm_vcpu_init() calls kvm_arch_vcpu_init() as its last
action, and kvm_vm_ioctl_create_vcpu() calls kvm_arch_vcpu_create()
immediately thereafter).  Rinse and repeat for kvm_arch_vcpu_uninit()
and kvm_arch_vcpu_destroy().  This paves the way for removing
kvm_arch_vcpu_{un}init() entirely.

Note, calling kvmppc_mmu_destroy() if kvmppc_core_vcpu_create() fails
may or may not be necessary.  Move it along with the more obvious call
to kvmppc_subarch_vcpu_uninit() so as not to inadvertantly introduce a
functional change and/or bug.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/powerpc/kvm/powerpc.c | 36 ++++++++++++++++++++++--------------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index b14e1314f020..3078231bd384 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -725,13 +725,29 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 {
 	int err;
 
-	err = kvmppc_core_vcpu_create(vcpu);
+	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
+	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
+	vcpu->arch.dec_expires = get_tb();
+
+#ifdef CONFIG_KVM_EXIT_TIMING
+	mutex_init(&vcpu->arch.exit_timing_lock);
+#endif
+	err = kvmppc_subarch_vcpu_init(vcpu);
 	if (err)
 		return err;
 
+	err = kvmppc_core_vcpu_create(vcpu);
+	if (err)
+		goto out_vcpu_uninit;
+
 	vcpu->arch.wqp = &vcpu->wq;
 	kvmppc_create_vcpu_debugfs(vcpu, vcpu->vcpu_id);
 	return 0;
+
+out_vcpu_uninit:
+	kvmppc_mmu_destroy(vcpu);
+	kvmppc_subarch_vcpu_uninit(vcpu);
+	return err;
 }
 
 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
@@ -761,6 +777,9 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 	}
 
 	kvmppc_core_vcpu_free(vcpu);
+
+	kvmppc_mmu_destroy(vcpu);
+	kvmppc_subarch_vcpu_uninit(vcpu);
 }
 
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
@@ -780,23 +799,12 @@ static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 
 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 {
-	int ret;
-
-	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
-	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
-	vcpu->arch.dec_expires = get_tb();
-
-#ifdef CONFIG_KVM_EXIT_TIMING
-	mutex_init(&vcpu->arch.exit_timing_lock);
-#endif
-	ret = kvmppc_subarch_vcpu_init(vcpu);
-	return ret;
+	return 0;
 }
 
 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 {
-	kvmppc_mmu_destroy(vcpu);
-	kvmppc_subarch_vcpu_uninit(vcpu);
+
 }
 
 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
-- 
2.22.0

