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hw/rdma: Deprecate the pvrdma device and the rdma subsystem

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This subsystem is said to be in a bad shape (see e.g. [1], [2]
and [3]), and nobody seems to feel responsible to pick up patches
for this and send them via a pull request. For example there is
a patch for a CVE-worthy bug posted more than half a year ago [4]
which has never been merged. Thus let's mark it as deprecated and
finally remove it unless somebody steps up and improves the code
quality and adds proper regression tests.

[1] https://lore.kernel.org/qemu-devel/20230918144206.560120-1-armbru@redhat.com/
[2] https://lore.kernel.org/qemu-devel/ZQnojJOqoFu73995@redhat.com/
[3] https://lore.kernel.org/qemu-devel/1054981c-e8ae-c676-3b04-eeb030e11f65@tls.msk.ru/
[4] https://lore.kernel.org/qemu-devel/20230301142926.18686-1-yuval.shaia.ml@gmail.com/

Message-ID: <20230927133019.228495-1-thuth@redhat.com>
Acked-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2023-09-27 15:30:19 +02:00
parent 85fc35afa9
commit e9a54265f5
3 changed files with 11 additions and 1 deletions
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2
MAINTAINERS
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@ -3843,7 +3843,7 @@ F: docs/block-replication.txt
PVRDMA
M: Yuval Shaia <yuval.shaia.ml@gmail.com>
M: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
S: Maintained
S: Odd Fixes
F: hw/rdma/*
F: hw/rdma/vmw/*
F: docs/pvrdma.txt

8
docs/about/deprecated.rst
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@ -327,6 +327,14 @@ QEMU's ``vhost`` feature, which would eliminate the high latency costs under
which the 9p ``proxy`` backend currently suffers. However as of to date nobody
has indicated plans for such kind of reimplementation unfortunately.
``-device pvrdma`` and the rdma subsystem (since 8.2)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The pvrdma device and the whole rdma subsystem are in a bad shape and
without active maintenance. The QEMU project intends to remove this
device and subsystem from the code base in a future release without
replacement unless somebody steps up and improves the situation.
Block device options
''''''''''''''''''''

2
hw/rdma/vmw/pvrdma_main.c
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@ -615,6 +615,8 @@ static void pvrdma_realize(PCIDevice *pdev, Error **errp)
bool ram_shared = false;
PCIDevice *func0;
warn_report_once("pvrdma is deprecated and will be removed in a future release");
rdma_info_report("Initializing device %s %x.%x", pdev->name,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));