linux-kernel - [PATCH v2 13/45] KVM: PPC: Book3S PR: Allocate book3s and shadow vcpu after common init

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Date:   Wed, 18 Dec 2019 13:54:58 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Marc Zyngier <maz@...nel.org>, James Hogan <jhogan@...nel.org>,
        Paul Mackerras <paulus@...abs.org>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-mips@...r.kernel.org, kvm-ppc@...r.kernel.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kurz <groug@...d.org>
Subject: [PATCH v2 13/45] KVM: PPC: Book3S PR: Allocate book3s and shadow vcpu after common init

Call kvm_vcpu_init() in kvmppc_core_vcpu_create_pr() prior to allocating
the book3s and shadow_vcpu objects in preparation of moving said call to
common PPC code.  Although kvm_vcpu_init() has an arch callback, the
callback is empty for Book3S PR, i.e. barring unseen black magic, moving
the allocation has no real functional impact.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/powerpc/kvm/book3s_pr.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 0d7c8a7bcb7b..10c65d412e81 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -1748,12 +1748,18 @@ static int kvmppc_core_vcpu_create_pr(struct kvm *kvm, struct kvm_vcpu *vcpu,
 				      unsigned int id)
 {
 	struct kvmppc_vcpu_book3s *vcpu_book3s;
-	int err = -ENOMEM;
 	unsigned long p;
+	int err;
+
+	err = kvm_vcpu_init(vcpu, kvm, id);
+	if (err)
+		return err;
+
+	err = -ENOMEM;
 
 	vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
 	if (!vcpu_book3s)
-		goto out;
+		goto uninit_vcpu;
 	vcpu->arch.book3s = vcpu_book3s;
 
 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
@@ -1763,14 +1769,9 @@ static int kvmppc_core_vcpu_create_pr(struct kvm *kvm, struct kvm_vcpu *vcpu,
 		goto free_vcpu3s;
 #endif
 
-	err = kvm_vcpu_init(vcpu, kvm, id);
-	if (err)
-		goto free_shadow_vcpu;
-
-	err = -ENOMEM;
 	p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
 	if (!p)
-		goto uninit_vcpu;
+		goto free_shadow_vcpu;
 	vcpu->arch.shared = (void *)p;
 #ifdef CONFIG_PPC_BOOK3S_64
 	/* Always start the shared struct in native endian mode */
@@ -1807,15 +1808,14 @@ static int kvmppc_core_vcpu_create_pr(struct kvm *kvm, struct kvm_vcpu *vcpu,
 
 free_shared_page:
 	free_page((unsigned long)vcpu->arch.shared);
-uninit_vcpu:
-	kvm_vcpu_uninit(vcpu);
 free_shadow_vcpu:
 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 	kfree(vcpu->arch.shadow_vcpu);
 free_vcpu3s:
 #endif
 	vfree(vcpu_book3s);
-out:
+uninit_vcpu:
+	kvm_vcpu_uninit(vcpu);
 	return err;
 }
 
-- 
2.24.1