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KVM: s390: Sanitize fpc registers for KVM_SET_FPU 

commit 7eef87dc99 (KVM: s390: fix
register setting) added a load of the floating point control register
to the KVM_SET_FPU path. Lets make sure that the fpc is valid.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Christian Borntraeger 2012-02-06 10:59:02 +01:00 committed by Avi Kivity
parent 6dbf79e716
commit 851755871c
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kvm/kvm-s390.c
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@ -460,7 +460,7 @@ 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) int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{ {
memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs));
vcpu->arch.guest_fpregs.fpc = fpu->fpc; vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK;
restore_fp_regs(&vcpu->arch.guest_fpregs); restore_fp_regs(&vcpu->arch.guest_fpregs);
return 0; return 0;
} }