On 29.11.2017 17:41, Christoffer Dall wrote:
> Move vcpu_load() and vcpu_put() into the architecture specific
> implementations of kvm_arch_vcpu_ioctl_set_fpu().
>
> Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
> ---
> 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 88dcb89..43278f3 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 8b54567..fd8b92f 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -7699,8 +7699,11 @@ 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;
> @@ -7711,6 +7714,7 @@ 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 73ad70a..06751bb 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:
>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
--
Thanks,
David / dhildenb
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