Drivers: hv: vmbus: Add module parameter to cap the VMBus version

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Currently, Linux guests negotiate the VMBus version with Hyper-V
and use the highest available VMBus version they can connect to.
This has some drawbacks: by using the highest available version,
certain code paths are never executed and can not be tested when
the guest runs on the newest host.

Add the module parameter "max_version", to upper-bound the VMBus
versions guests can negotiate.

Suggested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Andrea Parri 2019-10-15 13:46:46 +02:00 • committed by Sasha Levin

parent 2d4f49b3e1

commit 931cccc967

1 changed files with 13 additions and 0 deletions

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drivers/hv/connection.c

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