On Thu, 2015-03-19 at 15:55 +0100, Eric Auger wrote:
> Those 3 new wrapper functions call the respective VFIO external
> functions.
>
> Signed-off-by: Eric Auger <eric.au...@linaro.org>
>
> ---
>
> v4: creation
> ---
> include/linux/vfio.h | 8 +++-----
> virt/kvm/vfio.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 47 insertions(+), 5 deletions(-)
>
> diff --git a/include/linux/vfio.h b/include/linux/vfio.h
> index 7aa6330..78c1202 100644
> --- a/include/linux/vfio.h
> +++ b/include/linux/vfio.h
> @@ -108,14 +108,12 @@ extern struct device *vfio_external_base_device(struct
> vfio_device *vdev);
> struct vfio_platform_device;
> extern void vfio_external_mask(struct vfio_platform_device *vdev, int index);
> /*
> - * returns whether the VFIO IRQ is active:
> - * true if not yet deactivated at interrupt controller level or if
> - * automasked (level sensitive IRQ). Unfortunately there is no way to
> - * discriminate between handler auto-masking and user-space masking
> + * returns whether the VFIO IRQ is active at interrupt controller level
> + * or VFIO-masked. Note that if the use-space masked the IRQ index it
> + * cannot be discriminated from automasked handler situation.
> */
> extern bool vfio_external_is_active(struct vfio_platform_device *vdev,
> int index);
> -
> extern void vfio_external_set_automasked(struct vfio_platform_device *vdev,
> int index, bool automasked);
>
> diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c
> index 80a45e4..c995e51 100644
> --- a/virt/kvm/vfio.c
> +++ b/virt/kvm/vfio.c
> @@ -134,6 +134,50 @@ static void kvm_vfio_put_vfio_device(struct vfio_device
> *vdev)
> kvm_vfio_device_put_external_user(vdev);
> }
>
> +bool kvm_vfio_external_is_active(struct vfio_platform_device *vpdev,
> + int index)
> +{
> + bool (*fn)(struct vfio_platform_device *, int index);
> + bool active;
> +
> + fn = symbol_get(vfio_external_is_active);
> + if (!fn)
> + return -1;
> +
> + active = fn(vpdev, index);
> +
> + symbol_put(vfio_external_is_active);
> + return active;
> +}
> +
> +void kvm_vfio_external_mask(struct vfio_platform_device *vpdev,
> + int index)
> +{
> + void (*fn)(struct vfio_platform_device *, int index);
> +
> + fn = symbol_get(vfio_external_mask);
> + if (!fn)
> + return;
> +
> + fn(vpdev, index);
> +
> + symbol_put(vfio_external_mask);
> +}
> +
> +void kvm_vfio_external_set_automasked(struct vfio_platform_device *vpdev,
> + int index, bool automasked)
> +{
> + void (*fn)(struct vfio_platform_device *, int index, bool automasked);
> +
> + fn = symbol_get(vfio_external_set_automasked);
> + if (!fn)
> + return;
> +
> + fn(vpdev, index, automasked);
> +
> + symbol_put(vfio_external_set_automasked);
> +}
> +
I think we'd really prefer not to be dealing with vfio_platform_devices
here.
> static bool kvm_vfio_group_is_coherent(struct vfio_group *vfio_group)
> {
> long (*fn)(struct vfio_group *, unsigned long);
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