[PATCH 06/15] KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_sregs

[Christoffer Dall]

Move vcpu_load() and vcpu_put() into the architecture specific
implementations of kvm_arch_vcpu_ioctl_get_sregs().

Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
---
 arch/powerpc/kvm/book3s.c | 10 +++++++++-
 arch/powerpc/kvm/booke.c  | 11 ++++++++++-
 arch/s390/kvm/kvm-s390.c  |  8 ++++++++
 arch/x86/kvm/x86.c        |  6 ++++++
 virt/kvm/kvm_main.c       |  4 ----
 5 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 047d3178d70f..b7db75010843 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -484,7 +484,15 @@ void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs)
 {
-	return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
+	int ret;
+
+	ret = vcpu_load(vcpu);
+	if (ret)
+		return ret;
+	ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
+
+	vcpu_put(vcpu);
+	return ret;
 }
 
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 47b3d11345ed..d770f465cb9d 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1620,11 +1620,20 @@ int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
                                   struct kvm_sregs *sregs)
 {
+	int ret;
+
+	ret = vcpu_load(vcpu);
+	if (ret)
+		return ret;
+
 	sregs->pvr = vcpu->arch.pvr;
 
 	get_sregs_base(vcpu, sregs);
 	get_sregs_arch206(vcpu, sregs);
-	return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
+	ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
+
+	vcpu_put(vcpu);
+	return ret;
 }
 
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index eb2724d6e524..93a19e7e4f59 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2746,8 +2746,16 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs)
 {
+	int r;
+
+	r = vcpu_load(vcpu);
+	if (r)
+		return r;
+
 	memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
 	memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
+
+	vcpu_put(vcpu);
 	return 0;
 }
 
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e4e34af97ba0..7faa9479e8d8 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7381,8 +7381,13 @@ EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs)
 {
+	int r;
 	struct desc_ptr dt;
 
+	r = vcpu_load(vcpu);
+	if (r)
+		return r;
+
 	kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
 	kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
 	kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
@@ -7414,6 +7419,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 		set_bit(vcpu->arch.interrupt.nr,
 			(unsigned long *)sregs->interrupt_bitmap);
 
+	vcpu_put(vcpu);
 	return 0;
 }
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 7671ebb5971f..dbfaf190fca3 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2589,11 +2589,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
 		r = -ENOMEM;
 		if (!kvm_sregs)
 			goto out;
-		r = vcpu_load(vcpu);
-		if (r)
-			goto out;
 		r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs);
-		vcpu_put(vcpu);
 		if (r)
 			goto out;
 		r = -EFAULT;
-- 
2.14.2