diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-08-30 14:11:33 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-08-30 14:11:33 +0200 |
| commit | 20b8f9e2dde171c69da4a79c34fccdc2a8492797 (patch) | |
| tree | 2f6b01f9fe686637f5a9c29d7c6f6b5075dffc24 | |
| parent | Linux 4.8-rc4 (diff) | |
| parent | KVM: s390: don't use current->thread.fpu.* when accessing registers (diff) | |
| download | linux-20b8f9e2dde171c69da4a79c34fccdc2a8492797.tar.xz linux-20b8f9e2dde171c69da4a79c34fccdc2a8492797.zip | |
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.
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 10 |
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; } |