[PATCH v3 13/16] KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_fpu

[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_set_fpu().

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---
 arch/s390/kvm/kvm-s390.c | 15 ++++++++++++---
 arch/x86/kvm/x86.c       |  8 ++++++--
 virt/kvm/kvm_main.c      |  2 --
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 88dcb89656be..43278f334ce3 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2752,15 +2752,24 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 
 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 {
-       if (test_fp_ctl(fpu->fpc))
-               return -EINVAL;
+       int ret = 0;
+
+       vcpu_load(vcpu);
+
+       if (test_fp_ctl(fpu->fpc)) {
+               ret = -EINVAL;
+               goto out;
+       }
        vcpu->run->s.regs.fpc = fpu->fpc;
        if (MACHINE_HAS_VX)
                convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
                                 (freg_t *) fpu->fprs);
        else
                memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
-       return 0;
+
+out:
+       vcpu_put(vcpu);
+       return ret;
 }
 
 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 19b70e016858..95a329580c8b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7698,8 +7698,11 @@ int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, 
struct kvm_fpu *fpu)
 
 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 {
-       struct fxregs_state *fxsave =
-                       &vcpu->arch.guest_fpu.state.fxsave;
+       struct fxregs_state *fxsave;
+
+       vcpu_load(vcpu);
+
+       fxsave = &vcpu->arch.guest_fpu.state.fxsave;
 
        memcpy(fxsave->st_space, fpu->fpr, 128);
        fxsave->cwd = fpu->fcw;
@@ -7710,6 +7713,7 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, 
struct kvm_fpu *fpu)
        fxsave->rdp = fpu->last_dp;
        memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
 
+       vcpu_put(vcpu);
        return 0;
 }
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 73ad70af6b2d..06751bbecd58 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2689,9 +2689,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
                        fpu = NULL;
                        goto out;
                }
-               vcpu_load(vcpu);
                r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu);
-               vcpu_put(vcpu);
                break;
        }
        default:
-- 
2.14.2