On 04.12.2017 21:35, Christoffer Dall wrote:
> From: Christoffer Dall <christoffer.dall@linaro.org>
>
> Move vcpu_load() and vcpu_put() into the architecture specific
> implementations of kvm_arch_vcpu_ioctl_get_sregs().
>
> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
> ---
> arch/powerpc/kvm/book3s.c | 8 +++++++-
> arch/powerpc/kvm/booke.c | 9 ++++++++-
> arch/s390/kvm/kvm-s390.c | 4 ++++
> arch/x86/kvm/x86.c | 3 +++
> virt/kvm/kvm_main.c | 2 --
> 5 files changed, 22 insertions(+), 4 deletions(-)
>
> diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
> index 24bc7aabfc44..6cc2377549f7 100644
> --- a/arch/powerpc/kvm/book3s.c
> +++ b/arch/powerpc/kvm/book3s.c
> @@ -484,7 +484,13 @@ void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
> int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
> struct kvm_sregs *sregs)
> {
> - return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
> + int ret;
> +
> + vcpu_load(vcpu);
> + ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
> + vcpu_put(vcpu);
> +
> + return ret;
> }
>
> int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
> diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
> index bcbbeddc3430..f647e121070e 100644
> --- a/arch/powerpc/kvm/booke.c
> +++ b/arch/powerpc/kvm/booke.c
> @@ -1613,11 +1613,18 @@ int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu,
> struct kvm_sregs *sregs)
> int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
> struct kvm_sregs *sregs)
> {
> + int ret;
> +
> + vcpu_load(vcpu);
> +
> sregs->pvr = vcpu->arch.pvr;
>
> get_sregs_base(vcpu, sregs);
> get_sregs_arch206(vcpu, sregs);
> - return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
> + ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
> +
> + vcpu_put(vcpu);
> + return ret;
> }
>
> int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index e3476430578a..18011fc4ac49 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -2737,8 +2737,12 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
> *vcpu,
> int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
> struct kvm_sregs *sregs)
> {
> + vcpu_load(vcpu);
> +
> memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
> memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
> +
> + vcpu_put(vcpu);
> return 0;
> }
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 75eacce78f59..20a5f6776eea 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -7400,6 +7400,8 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
> {
> struct desc_ptr dt;
>
> + vcpu_load(vcpu);
> +
> kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
> kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
> kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
> @@ -7431,6 +7433,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
> set_bit(vcpu->arch.interrupt.nr,
> (unsigned long *)sregs->interrupt_bitmap);
>
> + vcpu_put(vcpu);
> return 0;
> }
>
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 963e249d7b79..779c03e39fa4 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -2581,9 +2581,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
> r = -ENOMEM;
> if (!kvm_sregs)
> goto out;
> - vcpu_load(vcpu);
> r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs);
> - vcpu_put(vcpu);
> if (r)
> goto out;
> r = -EFAULT;
>
Reviewed-by: David Hildenbrand <david@redhat.com>
--
Thanks,
David / dhildenb
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