[PATCH v3 08/16] KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_mpstate

[Christoffer Dall <cdall@kernel.org>]

From: Christoffer Dall <christoffer.dall@linaro.org>

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

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---
 arch/s390/kvm/kvm-s390.c | 11 +++++++++--
 arch/x86/kvm/x86.c       |  3 +++
 virt/kvm/arm/arm.c       |  3 +++
 virt/kvm/kvm_main.c      |  2 --
 4 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index d95b4f15e52b..396fc3db6d63 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2836,9 +2836,16 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu 
*vcpu,
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
 {
+       int ret;
+
+       vcpu_load(vcpu);
+
        /* CHECK_STOP and LOAD are not supported yet */
-       return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
-                                      KVM_MP_STATE_OPERATING;
+       ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
+                                     KVM_MP_STATE_OPERATING;
+
+       vcpu_put(vcpu);
+       return ret;
 }
 
 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a31a80aee0b9..9bf62c336aa5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7440,6 +7440,8 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
 {
+       vcpu_load(vcpu);
+
        kvm_apic_accept_events(vcpu);
        if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED &&
                                        vcpu->arch.pv.pv_unhalted)
@@ -7447,6 +7449,7 @@ int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
        else
                mp_state->mp_state = vcpu->arch.mp_state;
 
+       vcpu_put(vcpu);
        return 0;
 }
 
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 1f448b208686..a7171701df44 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -381,11 +381,14 @@ static void vcpu_power_off(struct kvm_vcpu *vcpu)
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
 {
+       vcpu_load(vcpu);
+
        if (vcpu->arch.power_off)
                mp_state->mp_state = KVM_MP_STATE_STOPPED;
        else
                mp_state->mp_state = KVM_MP_STATE_RUNNABLE;
 
+       vcpu_put(vcpu);
        return 0;
 }
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 19cf2d11f80f..eac3c29697db 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2603,9 +2603,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
        case KVM_GET_MP_STATE: {
                struct kvm_mp_state mp_state;
 
-               vcpu_load(vcpu);
                r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state);
-               vcpu_put(vcpu);
                if (r)
                        goto out;
                r = -EFAULT;
-- 
2.14.2