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Date:   Mon, 13 Apr 2020 11:57:44 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:     virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2] vdpa: make vhost, virtio depend on menu


On 2020/4/12 下午8:50, Michael S. Tsirkin wrote:
> If user did not configure any vdpa drivers, neither vhost
> nor virtio vdpa are going to be useful. So there's no point
> in prompting for these and selecting vdpa core automatically.
> Simplify configuration by making virtio and vhost vdpa
> drivers depend on vdpa menu entry. Once done, we no longer
> need a separate menu entry, so also get rid of this.
> While at it, fix up the IFC entry: VDPA->vDPA for consistency
> with other places.
>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>


Acked-by: Jason Wang <jasowang@...hat.com>


> ---
>
> changes from v1:
> 	fix up virtio vdpa Kconfig
>
>   drivers/vdpa/Kconfig   | 16 +++++-----------
>   drivers/vhost/Kconfig  |  2 +-
>   drivers/virtio/Kconfig |  2 +-
>   3 files changed, 7 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
> index d0cb0e583a5d..71d9a64f2c7d 100644
> --- a/drivers/vdpa/Kconfig
> +++ b/drivers/vdpa/Kconfig
> @@ -1,21 +1,16 @@
>   # SPDX-License-Identifier: GPL-2.0-only
> -config VDPA
> -	tristate
> +menuconfig VDPA
> +	tristate "vDPA drivers"
>   	help
>   	  Enable this module to support vDPA device that uses a
>   	  datapath which complies with virtio specifications with
>   	  vendor specific control path.
>   
> -menuconfig VDPA_MENU
> -	bool "VDPA drivers"
> -	default n
> -
> -if VDPA_MENU
> +if VDPA
>   
>   config VDPA_SIM
>   	tristate "vDPA device simulator"
>   	depends on RUNTIME_TESTING_MENU && HAS_DMA
> -	select VDPA
>   	select VHOST_RING
>   	select VHOST_IOTLB
>   	default n
> @@ -25,9 +20,8 @@ config VDPA_SIM
>   	  development of vDPA.
>   
>   config IFCVF
> -	tristate "Intel IFC VF VDPA driver"
> +	tristate "Intel IFC VF vDPA driver"
>   	depends on PCI_MSI
> -	select VDPA
>   	default n
>   	help
>   	  This kernel module can drive Intel IFC VF NIC to offload
> @@ -35,4 +29,4 @@ config IFCVF
>   	  To compile this driver as a module, choose M here: the module will
>   	  be called ifcvf.
>   
> -endif # VDPA_MENU
> +endif # VDPA
> diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
> index cb6b17323eb2..e79cbbdfea45 100644
> --- a/drivers/vhost/Kconfig
> +++ b/drivers/vhost/Kconfig
> @@ -64,7 +64,7 @@ config VHOST_VDPA
>   	tristate "Vhost driver for vDPA-based backend"
>   	depends on EVENTFD
>   	select VHOST
> -	select VDPA
> +	depends on VDPA
>   	help
>   	  This kernel module can be loaded in host kernel to accelerate
>   	  guest virtio devices with the vDPA-based backends.
> diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
> index 2aadf398d8cc..395c3f4d49cb 100644
> --- a/drivers/virtio/Kconfig
> +++ b/drivers/virtio/Kconfig
> @@ -45,7 +45,7 @@ config VIRTIO_PCI_LEGACY
>   
>   config VIRTIO_VDPA
>   	tristate "vDPA driver for virtio devices"
> -	select VDPA
> +	depends on VDPA
>   	select VIRTIO
>   	help
>   	  This driver provides support for virtio based paravirtual

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