netdev - Re: [PATCH v1 2/2] Drivers: hv: Make CONFIG

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Message-ID: <a8c8305c-b518-c840-fc64-50bcba302725@linux.microsoft.com>
Date: Fri, 12 Sep 2025 11:10:00 -0700
From: Mukesh R <mrathor@...ux.microsoft.com>
To: Greg KH <gregkh@...uxfoundation.org>
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,
 deller@....de, arnd@...db.de, sgarzare@...hat.com, horms@...nel.org
Subject: Re: [PATCH v1 2/2] Drivers: hv: Make CONFIG_HYPERV bool

On 9/12/25 04:43, Greg KH wrote:
> On Mon, Sep 08, 2025 at 02:01:34PM -0700, Mukesh R wrote:
>> On 9/6/25 04:36, Greg KH wrote:
>>> On Fri, Sep 05, 2025 at 06:09:52PM -0700, Mukesh Rathor wrote:
>>>> With CONFIG_HYPERV and CONFIG_HYPERV_VMBUS separated, change CONFIG_HYPERV
>>>> to bool from tristate. CONFIG_HYPERV now becomes the core Hyper-V
>>>> hypervisor support, such as hypercalls, clocks/timers, Confidential
>>>> Computing setup, PCI passthru, etc. that doesn't involve VMBus or VMBus
>>>> devices.
>>>
>>> But why are you making it so that this can not be a module anymore?  You
>>> are now forcing ALL Linux distro users to always have this code in their
>>> system, despite not ever using the feature.  That feels like a waste to
>>> me.
>>>
>>> What is preventing this from staying as a module?  Why must you always
>>> have this code loaded at all times for everyone?
>>
>> This is currently not a module. I assume it was at the beginning. In
>> drivers/Makefile today:
>>
>> obj-$(subst m,y,$(CONFIG_HYPERV))       += hv/
>>
>>
>> More context: CONFIG_HYPERV doesn't really reflect one module. It is
>> both for kernel built in code and building of stuff in drivers/hv.
>>
>> drivers/hv then builds 4 modules:
>>
>> obj-$(CONFIG_HYPERV)            += hv_vmbus.o
>> obj-$(CONFIG_HYPERV_UTILS)      += hv_utils.o
>> obj-$(CONFIG_HYPERV_BALLOON)    += hv_balloon.o
>> obj-$(CONFIG_MSHV_ROOT)         += mshv_root.o
>>
>> Notice vmbus is using CONFIG_HYPERV because there is no 
>> CONFIG_HYPERV_VMBUS. We are trying to fix that here.
> 
> This series does not apply to my tree:
> 
> checking file drivers/gpu/drm/Kconfig
> checking file drivers/hid/Kconfig
> checking file drivers/hv/Kconfig
> Hunk #2 FAILED at 82.
> 1 out of 2 hunks FAILED
> checking file drivers/hv/Makefile
> checking file drivers/input/serio/Kconfig
> checking file drivers/net/hyperv/Kconfig
> checking file drivers/pci/Kconfig
> checking file drivers/scsi/Kconfig
> checking file drivers/uio/Kconfig
> checking file drivers/video/fbdev/Kconfig
> checking file include/asm-generic/mshyperv.h
> Hunk #1 succeeded at 162 with fuzz 2 (offset -3 lines).
> Hunk #2 succeeded at 198 (offset -3 lines).
> Hunk #3 succeeded at 215 (offset -3 lines).
> checking file net/vmw_vsock/Kconfig
> 
> What was it made against?
> 

Sorry to hear that. It was built against hyper-next, but perhaps I 
accidentally used our internal mirror. Let me rebase and send V2
right away.

Thanks,
-Mukesh