linux-kernel - Re: [PATCH v1 0/2] Fix CONFIG_HYPERV and vmbus related anamoly

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Message-ID: <aNxuU6VI3dQVPYF7@liuwe-devbox-ubuntu-v2.lamzopl0uupeniq2etz1fddiyg.xx.internal.cloudapp.net>
Date: Tue, 30 Sep 2025 23:57:07 +0000
From: Wei Liu <wei.liu@...nel.org>
To: Mukesh Rathor <mrathor@...ux.microsoft.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org, linux-hyperv@...r.kernel.org,
	netdev@...r.kernel.org, linux-pci@...r.kernel.org,
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	linux-arch@...r.kernel.org, virtualization@...ts.linux.dev,
	maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
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Subject: Re: [PATCH v1 0/2] Fix CONFIG_HYPERV and vmbus related anamoly

On Fri, Sep 05, 2025 at 06:09:50PM -0700, Mukesh Rathor wrote:
> At present, drivers/Makefile will subst =m to =y for CONFIG_HYPERV
> for hv subdir. Also, drivers/hv/Makefile replaces =m to =y to build in
> hv_common.c that is needed for the drivers. Moreover, vmbus driver is
> built if CONFIG_HYPER is set, either loadable or builtin.
> 
> This is not a good approach. CONFIG_HYPERV is really an umbrella
> config that encompasses builtin code and various other things and not
> a dedicated config option for VMBus. VMBus should really have a config
> option just like CONFIG_HYPERV_BALLOON etc. This small series introduces
> CONFIG_HYPERV_VMBUS to build VMBus driver and make that distinction
> explicit. With that CONFIG_HYPERV could be changed to bool.
> 
> For now, hv_common.c is left as is to reduce conflicts for upcoming
> patches, but once merges are mostly done, that and some others should
> be moved to virt/hyperv directory.
> 
> V1:
>  o Change subject from hyper-v to "Drivers: hv:"
>  o Rewrite commit messages paying attention to VMBus and not vmbus
>  o Change some wordings in Kconfig
>  o Make new VMBUS config option default to HYPERV option for a smoother
>    transition
> 
> Mukesh Rathor (2):
>   Driver: hv: Add CONFIG_HYPERV_VMBUS option
>   Drivers: hv: Make CONFIG_HYPERV bool
> 

Applied. Thanks.