linux-kernel - Re: [GIT PULL] virtio: features

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Message-ID: <CACGkMEvoGOO0jtq5T7arAjRoB_0_fHB2+hPJe1JsPqcAuvr98w@mail.gmail.com>
Date:   Wed, 29 Nov 2023 17:16:49 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Ning, Hongyu" <hongyu.ning@...ux.intel.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>, xuanzhuo@...ux.alibaba.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        eperezma@...hat.com, shannon.nelson@....com,
        yuanyaogoog@...omium.org, yuehaibing@...wei.com,
        kirill.shutemov@...ux.intel.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com,
        alexander.shishkin@...ux.intel.com
Subject: Re: [GIT PULL] virtio: features

On Wed, Nov 29, 2023 at 5:05 PM Ning, Hongyu
<hongyu.ning@...ux.intel.com> wrote:
>
>
>
> On 2023/9/4 6:13, Michael S. Tsirkin wrote:
> > The following changes since commit 2dde18cd1d8fac735875f2e4987f11817cc0bc2c:
> >
> >    Linux 6.5 (2023-08-27 14:49:51 -0700)
> >
> > are available in the Git repository at:
> >
> >    https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus
> >
> > for you to fetch changes up to 1acfe2c1225899eab5ab724c91b7e1eb2881b9ab:
> >
> >    virtio_ring: fix avail_wrap_counter in virtqueue_add_packed (2023-09-03 18:10:24 -0400)
> >
> > ----------------------------------------------------------------
> > virtio: features
> >
> > a small pull request this time around, mostly because the
> > vduse network got postponed to next relase so we can be sure
> > we got the security store right.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> >
> > ----------------------------------------------------------------
> > Eugenio Pérez (4):
> >        vdpa: add VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK flag
> >        vdpa: accept VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK backend feature
> >        vdpa: add get_backend_features vdpa operation
> >        vdpa_sim: offer VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK
> >
> > Jason Wang (1):
> >        virtio_vdpa: build affinity masks conditionally
> >
> > Xuan Zhuo (12):
> >        virtio_ring: check use_dma_api before unmap desc for indirect
> >        virtio_ring: put mapping error check in vring_map_one_sg
> >        virtio_ring: introduce virtqueue_set_dma_premapped()
> >        virtio_ring: support add premapped buf
> >        virtio_ring: introduce virtqueue_dma_dev()
> >        virtio_ring: skip unmap for premapped
> >        virtio_ring: correct the expression of the description of virtqueue_resize()
> >        virtio_ring: separate the logic of reset/enable from virtqueue_resize
> >        virtio_ring: introduce virtqueue_reset()
> >        virtio_ring: introduce dma map api for virtqueue
> >        virtio_ring: introduce dma sync api for virtqueue
> >        virtio_net: merge dma operations when filling mergeable buffers
>
> Hi,
> above patch (upstream commit 295525e29a5b) seems causing a virtnet
> related Call Trace after WARNING from kernel/dma/debug.c.
>
> details (log and test setup) tracked in
> https://bugzilla.kernel.org/show_bug.cgi?id=218204
>
> it's recently noticed in a TDX guest testing since v6.6.0 release cycle
> and can still be reproduced in latest v6.7.0-rc3.
>
> as local bisects results show, above WARNING and Call Trace is linked
> with this patch, do you mind to take a look?

Looks like virtqueue_dma_sync_single_range_for_cpu() use
DMA_BIDIRECTIONAL unconditionally.

We should use dir here.

Mind to try?

Thanks

>
> >
> > Yuan Yao (1):
> >        virtio_ring: fix avail_wrap_counter in virtqueue_add_packed
> >
> > Yue Haibing (1):
> >        vdpa/mlx5: Remove unused function declarations
> >
> >   drivers/net/virtio_net.c           | 230 ++++++++++++++++++---
> >   drivers/vdpa/mlx5/core/mlx5_vdpa.h |   3 -
> >   drivers/vdpa/vdpa_sim/vdpa_sim.c   |   8 +
> >   drivers/vhost/vdpa.c               |  15 +-
> >   drivers/virtio/virtio_ring.c       | 412 ++++++++++++++++++++++++++++++++-----
> >   drivers/virtio/virtio_vdpa.c       |  17 +-
> >   include/linux/vdpa.h               |   4 +
> >   include/linux/virtio.h             |  22 ++
> >   include/uapi/linux/vhost_types.h   |   4 +
> >   9 files changed, 625 insertions(+), 90 deletions(-)
> >
>