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Bug 2119809 - mlx Fixes for vDPA control virtqueue
Summary: mlx Fixes for vDPA control virtqueue
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: kernel
Version: unspecified
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Eugenio Pérez Martín
QA Contact: Lei Yang
URL:
Whiteboard:
Depends On: 1939367 2116876
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-08-19 13:09 UTC by Eugenio Pérez Martín
Modified: 2023-05-09 09:43 UTC (History)
13 users (show)

Fixed In Version: kernel-5.14.0-163.el9
Doc Type: Enhancement
Doc Text:
Clone Of: 1939367
Environment:
Last Closed: 2023-05-09 08:00:16 UTC
Type: Feature Request
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Gitlab redhat/centos-stream/src/kernel centos-stream-9 merge_requests 1285 0 None opened vdpa/mlx5: Update Control VQ callback information 2022-08-19 14:05:34 UTC
Red Hat Issue Tracker RHELPLAN-131739 0 None None None 2022-08-19 13:12:04 UTC
Red Hat Product Errata RHSA-2023:2458 0 None None None 2023-05-09 08:01:14 UTC

Description Eugenio Pérez Martín 2022-08-19 13:09:12 UTC 
MLX driver fixes pending after bz #1939367, that enable total live migration if the device is running all the time with shadow virtqueue enabled:

commit ace9252446ec615cd79a5f77d90edb25c0b9d024
Author: Eli Cohen <elic>
Date:   Mon Jun 13 10:59:58 2022 +0300

    vdpa/mlx5: Initialize CVQ vringh only once
    
    Currently, CVQ vringh is initialized inside setup_virtqueues() which is
    called every time a memory update is done. This is undesirable since it
    resets all the context of the vring, including the available and used
    indices.
    
    Move the initialization to mlx5_vdpa_set_status() when
    VIRTIO_CONFIG_S_DRIVER_OK is set.
    
    Signed-off-by: Eli Cohen <elic>
    Message-Id: <20220613075958.511064-2-elic>
    Signed-off-by: Michael S. Tsirkin <mst>
    Acked-by: Jason Wang <jasowang>
    Acked-by: Eugenio Pérez <eperezma>

commit 40f2f3e94178d45e4ee6078effba2dfc76f6f5ba
Author: Eli Cohen <elic>
Date:   Mon Jun 13 10:59:57 2022 +0300

    vdpa/mlx5: Update Control VQ callback information
    
    The control VQ specific information is stored in the dedicated struct
    mlx5_control_vq. When the callback is updated through
    mlx5_vdpa_set_vq_cb(), make sure to update the control VQ struct.
    
    Fixes: 5262912ef3cf ("vdpa/mlx5: Add support for control VQ and MAC setting")
    Signed-off-by: Eli Cohen <elic>
    Message-Id: <20220613075958.511064-1-elic>
    Signed-off-by: Michael S. Tsirkin <mst>
    Acked-by: Jason Wang <jasowang)
Comment 20 errata-xmlrpc 2023-05-09 08:00:16 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Important: kernel security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2023:2458
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