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Message-ID: <aNxvde1KTtLeZEKy@liuwe-devbox-ubuntu-v2.lamzopl0uupeniq2etz1fddiyg.xx.internal.cloudapp.net>
Date: Wed, 1 Oct 2025 00:01:57 +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,
	linux-scsi@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-arch@...r.kernel.org, virtualization@...ts.linux.dev,
	maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
	tzimmermann@...e.de, airlied@...il.com, simona@...ll.ch,
	jikos@...nel.org, bentiss@...nel.org, kys@...rosoft.com,
	haiyangz@...rosoft.com, wei.liu@...nel.org, decui@...rosoft.com,
	dmitry.torokhov@...il.com, andrew+netdev@...n.ch,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, bhelgaas@...gle.com,
	James.Bottomley@...senpartnership.com, martin.petersen@...cle.com,
	gregkh@...uxfoundation.org, deller@....de, arnd@...db.de,
	sgarzare@...hat.com, horms@...nel.org
Subject: Re: [PATCH v2 0/2] Fix CONFIG_HYPERV and vmbus related anamoly

On Mon, Sep 15, 2025 at 04:46:02PM -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.
> 
> V2:
>  o rebased on hyper-next: commit 553d825fb2f0 
>         ("x86/hyperv: Switch to msi_create_parent_irq_domain()")
> 
> 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

I changed Driver to Drivers and applied both patches. Thanks.

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