Subject: [PATCH v3 06/16] KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_sregs

From: [email-masked] (Christoffer Dall)
Date: Mon, 4 Dec 2017 21:35:28 +0100

From: Christoffer Dall <[email-masked]>

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

Signed-off-by: Christoffer Dall <[email-masked]>
---
 arch/powerpc/kvm/book3s.c | 8 +++++++-
 arch/powerpc/kvm/booke.c  | 9 ++++++++-
 arch/s390/kvm/kvm-s390.c  | 4 ++++
 arch/x86/kvm/x86.c        | 3 +++
 virt/kvm/kvm_main.c       | 2 --
 5 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 24bc7aabfc44..6cc2377549f7 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -484,7 +484,13 @@ 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;
+
+	vcpu_load(vcpu);
+	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 bcbbeddc3430..f647e121070e 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1613,11 +1613,18 @@ 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;
+
+	vcpu_load(vcpu);
+
 	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 e3476430578a..18011fc4ac49 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2737,8 +2737,12 @@ 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)
 {
+	vcpu_load(vcpu);
+
 	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 75eacce78f59..20a5f6776eea 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7400,6 +7400,8 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 {
 	struct desc_ptr dt;
 
+	vcpu_load(vcpu);
+
 	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);
@@ -7431,6 +7433,7 @@ 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 963e249d7b79..779c03e39fa4 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2581,9 +2581,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
 		r = -ENOMEM;
 		if (!kvm_sregs)
 			goto out;
-		vcpu_load(vcpu);
 		r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs);
-		vcpu_put(vcpu);
 		if (r)
 			goto out;
 		r = -EFAULT;
-- 
2.14.2