[PATCH v4 11/14] KVM: SVM: Move SEV VMCB tracking allocation to sev.c

[Sean Christopherson <seanjc@xxxxxxxxxx>]

Move the allocation of the SEV VMCB array to sev.c to help pave the way
toward encapsulating SEV enabling wholly within sev.c.

No functional change intended.

Reviewed by: Tom Lendacky <thomas.lendacky@xxxxxxx>
Reviewed-by: Brijesh Singh <brijesh.singh@xxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
 arch/x86/kvm/svm/sev.c | 12 ++++++++++++
 arch/x86/kvm/svm/svm.c | 16 ++++++++--------
 arch/x86/kvm/svm/svm.h |  1 +
 3 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 63d4f624c742..4685be80f551 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -1406,6 +1406,18 @@ void sev_hardware_teardown(void)
 	sev_flush_asids();
 }
 
+int sev_cpu_init(struct svm_cpu_data *sd)
+{
+	if (!svm_sev_enabled())
+		return 0;
+
+	sd->sev_vmcbs = kcalloc(max_sev_asid + 1, sizeof(void *), GFP_KERNEL);
+	if (!sd->sev_vmcbs)
+		return -ENOMEM;
+
+	return 0;
+}
+
 /*
  * Pages used by hardware to hold guest encrypted state must be flushed before
  * returning them to the system.
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 0fa6c409b484..51cea470d0bb 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -549,22 +549,22 @@ static void svm_cpu_uninit(int cpu)
 static int svm_cpu_init(int cpu)
 {
 	struct svm_cpu_data *sd;
+	int ret;
 
 	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
 	if (!sd)
 		return -ENOMEM;
 	sd->cpu = cpu;
 	sd->save_area = alloc_page(GFP_KERNEL);
-	if (!sd->save_area)
+	if (!sd->save_area) {
+		ret = -ENOMEM;
 		goto free_cpu_data;
+	}
 	clear_page(page_address(sd->save_area));
 
-	if (svm_sev_enabled()) {
-		sd->sev_vmcbs = kcalloc(max_sev_asid + 1, sizeof(void *),
-					GFP_KERNEL);
-		if (!sd->sev_vmcbs)
-			goto free_save_area;
-	}
+	ret = sev_cpu_init(sd);
+	if (ret)
+		goto free_save_area;
 
 	per_cpu(svm_data, cpu) = sd;
 
@@ -574,7 +574,7 @@ static int svm_cpu_init(int cpu)
 	__free_page(sd->save_area);
 free_cpu_data:
 	kfree(sd);
-	return -ENOMEM;
+	return ret;
 
 }
 
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index aec70f6cd243..0953251232c8 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -562,6 +562,7 @@ int svm_unregister_enc_region(struct kvm *kvm,
 void pre_sev_run(struct vcpu_svm *svm, int cpu);
 void __init sev_hardware_setup(void);
 void sev_hardware_teardown(void);
+int sev_cpu_init(struct svm_cpu_data *sd);
 void sev_free_vcpu(struct kvm_vcpu *vcpu);
 int sev_handle_vmgexit(struct vcpu_svm *svm);
 int sev_es_string_io(struct vcpu_svm *svm, int size, unsigned int port, int in);
-- 
2.30.1.766.gb4fecdf3b7-goog