Re: [PATCH 5/6] vringh: fix copy direction of vringh_iov_push_kern()
On 2019/9/24 下午10:04, Alex Williamson wrote: > On Mon, 23 Sep 2019 12:00:41 -0400 > "Michael S. Tsirkin" wrote: > >> On Mon, Sep 23, 2019 at 09:45:59AM -0600, Alex Williamson wrote: >>> On Mon, 23 Sep 2019 21:03:30 +0800 >>> Jason Wang wrote: >>> We want to copy from iov to buf, so the direction was wrong. Signed-off-by: Jason Wang --- drivers/vhost/vringh.c | 8 +++- 1 file changed, 7 insertions(+), 1 deletion(-) >>> Why is this included in the series? Seems like an unrelated fix being >>> held up within a proposal for a new feature. Thanks, >>> >>> Alex >> It's better to have it as patch 1/6, but it's a dependency of the >> example driver in the series. I can reorder when I apply. > It's a fix, please submit it separately through virtio/vhost channels, > then it will already be in the base kernel we use for the rest of the > series. The remainder of the series certainly suggests a workflow > through the vfio tree rather than virtio/vhost. Thanks, > > Alex Ok. Thanks ___ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
Re: [PATCH 5/6] vringh: fix copy direction of vringh_iov_push_kern()
On Mon, 23 Sep 2019 12:00:41 -0400
"Michael S. Tsirkin" wrote:
> On Mon, Sep 23, 2019 at 09:45:59AM -0600, Alex Williamson wrote:
> > On Mon, 23 Sep 2019 21:03:30 +0800
> > Jason Wang wrote:
> >
> > > We want to copy from iov to buf, so the direction was wrong.
> > >
> > > Signed-off-by: Jason Wang
> > > ---
> > > drivers/vhost/vringh.c | 8 +++-
> > > 1 file changed, 7 insertions(+), 1 deletion(-)
> >
> >
> > Why is this included in the series? Seems like an unrelated fix being
> > held up within a proposal for a new feature. Thanks,
> >
> > Alex
>
> It's better to have it as patch 1/6, but it's a dependency of the
> example driver in the series. I can reorder when I apply.
It's a fix, please submit it separately through virtio/vhost channels,
then it will already be in the base kernel we use for the rest of the
series. The remainder of the series certainly suggests a workflow
through the vfio tree rather than virtio/vhost. Thanks,
Alex
> > > diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
> > > index 08ad0d1f0476..a0a2d74967ef 100644
> > > --- a/drivers/vhost/vringh.c
> > > +++ b/drivers/vhost/vringh.c
> > > @@ -852,6 +852,12 @@ static inline int xfer_kern(void *src, void *dst,
> > > size_t len)
> > > return 0;
> > > }
> > >
> > > +static inline int kern_xfer(void *dst, void *src, size_t len)
> > > +{
> > > + memcpy(dst, src, len);
> > > + return 0;
> > > +}
> > > +
> > > /**
> > > * vringh_init_kern - initialize a vringh for a kernelspace vring.
> > > * @vrh: the vringh to initialize.
> > > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern);
> > > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov,
> > >const void *src, size_t len)
> > > {
> > > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern);
> > > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer);
> > > }
> > > EXPORT_SYMBOL(vringh_iov_push_kern);
> > >
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Re: [PATCH 5/6] vringh: fix copy direction of vringh_iov_push_kern()
On Mon, Sep 23, 2019 at 09:45:59AM -0600, Alex Williamson wrote:
> On Mon, 23 Sep 2019 21:03:30 +0800
> Jason Wang wrote:
>
> > We want to copy from iov to buf, so the direction was wrong.
> >
> > Signed-off-by: Jason Wang
> > ---
> > drivers/vhost/vringh.c | 8 +++-
> > 1 file changed, 7 insertions(+), 1 deletion(-)
>
>
> Why is this included in the series? Seems like an unrelated fix being
> held up within a proposal for a new feature. Thanks,
>
> Alex
It's better to have it as patch 1/6, but it's a dependency of the
example driver in the series. I can reorder when I apply.
> > diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
> > index 08ad0d1f0476..a0a2d74967ef 100644
> > --- a/drivers/vhost/vringh.c
> > +++ b/drivers/vhost/vringh.c
> > @@ -852,6 +852,12 @@ static inline int xfer_kern(void *src, void *dst,
> > size_t len)
> > return 0;
> > }
> >
> > +static inline int kern_xfer(void *dst, void *src, size_t len)
> > +{
> > + memcpy(dst, src, len);
> > + return 0;
> > +}
> > +
> > /**
> > * vringh_init_kern - initialize a vringh for a kernelspace vring.
> > * @vrh: the vringh to initialize.
> > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern);
> > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov,
> > const void *src, size_t len)
> > {
> > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern);
> > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer);
> > }
> > EXPORT_SYMBOL(vringh_iov_push_kern);
> >
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Re: [PATCH 5/6] vringh: fix copy direction of vringh_iov_push_kern()
On Mon, 23 Sep 2019 21:03:30 +0800
Jason Wang wrote:
> We want to copy from iov to buf, so the direction was wrong.
>
> Signed-off-by: Jason Wang
> ---
> drivers/vhost/vringh.c | 8 +++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
Why is this included in the series? Seems like an unrelated fix being
held up within a proposal for a new feature. Thanks,
Alex
> diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
> index 08ad0d1f0476..a0a2d74967ef 100644
> --- a/drivers/vhost/vringh.c
> +++ b/drivers/vhost/vringh.c
> @@ -852,6 +852,12 @@ static inline int xfer_kern(void *src, void *dst, size_t
> len)
> return 0;
> }
>
> +static inline int kern_xfer(void *dst, void *src, size_t len)
> +{
> + memcpy(dst, src, len);
> + return 0;
> +}
> +
> /**
> * vringh_init_kern - initialize a vringh for a kernelspace vring.
> * @vrh: the vringh to initialize.
> @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern);
> ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov,
>const void *src, size_t len)
> {
> - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern);
> + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer);
> }
> EXPORT_SYMBOL(vringh_iov_push_kern);
>
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