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authorPaolo Bonzini <pbonzini@redhat.com>2016-08-30 14:11:33 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2016-08-30 14:11:33 +0200
commit20b8f9e2dde171c69da4a79c34fccdc2a8492797 (patch)
tree2f6b01f9fe686637f5a9c29d7c6f6b5075dffc24 /arch/s390
parent3eab887a55424fc2c27553b7bfe32330df83f7b8 (diff)
parenta7d4b8f2565ad0dfdff9a222d1d87990c73b36e8 (diff)
Merge tag 'kvm-s390-master-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master
KVM: s390: Fix for fpu register errors since 4.7 This fixes a regression that was introduced by a semantic change in commit 3f6813b9a5e0 ("s390/fpu: allocate 'struct fpu' with the task_struct"). Symptoms are broken host userspace fpu registers if the old FPU set/get ioctls are used.
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/kvm-s390.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index f142215ed30d..607ec91966c7 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2231,9 +2231,10 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
return -EINVAL;
current->thread.fpu.fpc = fpu->fpc;
if (MACHINE_HAS_VX)
- convert_fp_to_vx(current->thread.fpu.vxrs, (freg_t *)fpu->fprs);
+ convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
+ (freg_t *) fpu->fprs);
else
- memcpy(current->thread.fpu.fprs, &fpu->fprs, sizeof(fpu->fprs));
+ memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
return 0;
}
@@ -2242,9 +2243,10 @@ int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
/* make sure we have the latest values */
save_fpu_regs();
if (MACHINE_HAS_VX)
- convert_vx_to_fp((freg_t *)fpu->fprs, current->thread.fpu.vxrs);
+ convert_vx_to_fp((freg_t *) fpu->fprs,
+ (__vector128 *) vcpu->run->s.regs.vrs);
else
- memcpy(fpu->fprs, current->thread.fpu.fprs, sizeof(fpu->fprs));
+ memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
fpu->fpc = current->thread.fpu.fpc;
return 0;
}