Re: [PATCH V2] vhost: do not enable VHOST_MENU by default

[Jason Wang <jasowang@redhat.com>]

On 2020/4/17 上午6:55, Michael S. Tsirkin wrote:
> On Wed, Apr 15, 2020 at 10:43:56AM +0800, Jason Wang wrote:
>> We try to keep the defconfig untouched after decoupling CONFIG_VHOST
>> out of CONFIG_VIRTUALIZATION in commit 20c384f1ea1a
>> ("vhost: refine vhost and vringh kconfig") by enabling VHOST_MENU by
>> default. Then the defconfigs can keep enabling CONFIG_VHOST_NET
>> without the caring of CONFIG_VHOST.
>>
>> But this will leave a "CONFIG_VHOST_MENU=y" in all defconfigs and even
>> for the ones that doesn't want vhost. So it actually shifts the
>> burdens to the maintainers of all other to add "CONFIG_VHOST_MENU is
>> not set". So this patch tries to enable CONFIG_VHOST explicitly in
>> defconfigs that enables CONFIG_VHOST_NET and CONFIG_VHOST_VSOCK.
>>
>> Acked-by: Christian Borntraeger<borntraeger@de.ibm.com>  (s390)
>> Acked-by: Michael Ellerman<mpe@ellerman.id.au>  (powerpc)
>> Cc: Thomas Bogendoerfer<tsbogend@alpha.franken.de>
>> Cc: Benjamin Herrenschmidt<benh@kernel.crashing.org>
>> Cc: Paul Mackerras<paulus@samba.org>
>> Cc: Michael Ellerman<mpe@ellerman.id.au>
>> Cc: Heiko Carstens<heiko.carstens@de.ibm.com>
>> Cc: Vasily Gorbik<gor@linux.ibm.com>
>> Cc: Christian Borntraeger<borntraeger@de.ibm.com>
>> Reported-by: Geert Uytterhoeven<geert@linux-m68k.org>
>> Signed-off-by: Jason Wang<jasowang@redhat.com>
> I rebased this on top of OABI fix since that
> seems more orgent to fix.
> Pushed to my vhost branch pls take a look and
> if possible test.
> Thanks!


I test this patch by generating the defconfigs that wants vhost_net or 
vhost_vsock. All looks fine.

But having CONFIG_VHOST_DPN=y may end up with the similar situation that 
this patch want to address.

Maybe we can let CONFIG_VHOST depends on !ARM || AEABI then add another 
menuconfig for VHOST_RING and do something similar?

Thanks