Hi Jason, On Thu, Mar 26, 2020 at 3:07 PM Jason Wang <jasowang at redhat.com> wrote:> This patch implements a software vDPA networking device. The datapath > is implemented through vringh and workqueue. The device has an on-chip > IOMMU which translates IOVA to PA. For kernel virtio drivers, vDPA > simulator driver provides dma_ops. For vhost driers, set_map() methods > of vdpa_config_ops is implemented to accept mappings from vhost. > > Currently, vDPA device simulator will loopback TX traffic to RX. So > the main use case for the device is vDPA feature testing, prototyping > and development. > > Note, there's no management API implemented, a vDPA device will be > registered once the module is probed. We need to handle this in the > future development. > > Signed-off-by: Jason Wang <jasowang at redhat.com>This is now commit 2c53d0f64c06f458 ("vdpasim: vDPA device simulator").> --- a/drivers/virtio/vdpa/Kconfig > +++ b/drivers/virtio/vdpa/Kconfig > @@ -5,3 +5,22 @@ config VDPA > 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* * VDPA drivers * VDPA drivers (VDPA_MENU) [N/y/?] (NEW) ? There is no help available for this option. Symbol: VDPA_MENU [=n] Type : bool Defined at drivers/vdpa/Kconfig:9 Prompt: VDPA drivers Location: -> Device Drivers I think this deserves a help text, so users know if they want to enable this option or not. I had a quick look, but couldn't find the meaning of "vdpa" in the whole kernel source tree. Thanks!> + > +if VDPA_MENU > + > +config VDPA_SIM > + tristate "vDPA device simulator" > + depends on RUNTIME_TESTING_MENU > + select VDPA > + select VHOST_RING > + default n > + help > + vDPA networking device simulator which loop TX traffic back > + to RX. This device is used for testing, prototyping and > + development of vDPA. > + > +endif # VDPA_MENUGr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
On 2020/4/10 ??3:45, Geert Uytterhoeven wrote:> Hi Jason, > > On Thu, Mar 26, 2020 at 3:07 PM Jason Wang <jasowang at redhat.com> wrote: >> This patch implements a software vDPA networking device. The datapath >> is implemented through vringh and workqueue. The device has an on-chip >> IOMMU which translates IOVA to PA. For kernel virtio drivers, vDPA >> simulator driver provides dma_ops. For vhost driers, set_map() methods >> of vdpa_config_ops is implemented to accept mappings from vhost. >> >> Currently, vDPA device simulator will loopback TX traffic to RX. So >> the main use case for the device is vDPA feature testing, prototyping >> and development. >> >> Note, there's no management API implemented, a vDPA device will be >> registered once the module is probed. We need to handle this in the >> future development. >> >> Signed-off-by: Jason Wang <jasowang at redhat.com> > This is now commit 2c53d0f64c06f458 ("vdpasim: vDPA device simulator"). > >> --- a/drivers/virtio/vdpa/Kconfig >> +++ b/drivers/virtio/vdpa/Kconfig >> @@ -5,3 +5,22 @@ config VDPA >> 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 > * > * VDPA drivers > * > VDPA drivers (VDPA_MENU) [N/y/?] (NEW) ? > > There is no help available for this option. > Symbol: VDPA_MENU [=n] > Type : bool > Defined at drivers/vdpa/Kconfig:9 > Prompt: VDPA drivers > Location: > -> Device Drivers > > I think this deserves a help text, so users know if they want to enable this > option or not.Will add a help text for this.> > I had a quick look, but couldn't find the meaning of "vdpa" in the whole kernel > source tree.The meaning was explained in the commit log of 961e9c84077f6c8579d7a628cbe94a675cb67ae4 and help text for CONFIG_VDPA. Thanks> > Thanks! > >> + >> +if VDPA_MENU >> + >> +config VDPA_SIM >> + tristate "vDPA device simulator" >> + depends on RUNTIME_TESTING_MENU >> + select VDPA >> + select VHOST_RING >> + default n >> + help >> + vDPA networking device simulator which loop TX traffic back >> + to RX. This device is used for testing, prototyping and >> + development of vDPA. >> + >> +endif # VDPA_MENU > Gr{oetje,eeting}s, > > Geert >