KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_sregs

Web:        https://git.kernel.org/torvalds/c/bcdec41cefbea525ad424050650acb0f2eed1378
Commit:     bcdec41cefbea525ad424050650acb0f2eed1378
Parent:     875656fe0c8473c544860d557ca1512753d6aeef
Refname:    refs/heads/master
Author:     Christoffer Dall <[email protected]>
AuthorDate: Mon Dec 4 21:35:28 2017 +0100
Committer:  Paolo Bonzini <[email protected]>
CommitDate: Thu Dec 14 09:26:52 2017 +0100

    KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_sregs
    
    Move vcpu_load() and vcpu_put() into the architecture specific
    implementations of kvm_arch_vcpu_ioctl_get_sregs().
    
    Signed-off-by: Christoffer Dall <[email protected]>
    Reviewed-by: David Hildenbrand <[email protected]>
    Reviewed-by: Cornelia Huck <[email protected]>
    Signed-off-by: Paolo Bonzini <[email protected]>
---
 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 ab08823a854b..87544beff507 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2734,8 +2734,12 @@ 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 f82e87bb3a51..66a8d8cd00f6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7425,6 +7425,8 @@ 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);
@@ -7456,6 +7458,7 @@ 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 e25c1a1a4120..4c2f6a4d1852 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2612,9 +2612,7 @@ out_free1:
 		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;
--
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