linux-kernel - Re: [PATCH V9 1/9] vhost: refine vhost and vringh kconfig

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Message-ID: <c11c2195-88eb-2096-af47-40f2da5b389f@redhat.com>
Date:   Thu, 2 Apr 2020 11:22:57 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        jgg@...lanox.com, maxime.coquelin@...hat.com,
        cunming.liang@...el.com, zhihong.wang@...el.com,
        rob.miller@...adcom.com, xiao.w.wang@...el.com,
        lingshan.zhu@...el.com, eperezma@...hat.com, lulu@...hat.com,
        parav@...lanox.com, kevin.tian@...el.com, stefanha@...hat.com,
        rdunlap@...radead.org, hch@...radead.org, aadam@...hat.com,
        jiri@...lanox.com, shahafs@...lanox.com, hanand@...inx.com,
        mhabets@...arflare.com, gdawar@...inx.com, saugatm@...inx.com,
        vmireyno@...vell.com, zhangweining@...jie.com.cn
Subject: Re: [PATCH V9 1/9] vhost: refine vhost and vringh kconfig


On 2020/4/2 上午12:08, Michael S. Tsirkin wrote:
> On Wed, Apr 01, 2020 at 10:29:32PM +0800, Jason Wang wrote:
>> >From 9b3a5d23b8bf6b0a11e65e688335d782f8e6aa5c Mon Sep 17 00:00:00 2001
>> From: Jason Wang <jasowang@...hat.com>
>> Date: Wed, 1 Apr 2020 22:17:27 +0800
>> Subject: [PATCH] vhost: let CONFIG_VHOST to be selected by drivers
>>
>> The defconfig on some archs enable vhost_net or vhost_vsock by
>> default. So instead of adding CONFIG_VHOST=m to all of those files,
>> simply letting CONFIG_VHOST to be selected by all of the vhost
>> drivers. This fixes the build on the archs with CONFIG_VHOST_NET=m in
>> their defconfig.
>>
>> Signed-off-by: Jason Wang <jasowang@...hat.com>
>> ---
>>   drivers/vhost/Kconfig | 15 +++++++++++----
>>   1 file changed, 11 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
>> index 2523a1d4290a..362b832f5338 100644
>> --- a/drivers/vhost/Kconfig
>> +++ b/drivers/vhost/Kconfig
>> @@ -11,19 +11,23 @@ config VHOST_RING
>>   	  This option is selected by any driver which needs to access
>>   	  the host side of a virtio ring.
>>   
>> -menuconfig VHOST
>> -	tristate "Host kernel accelerator for virtio (VHOST)"
>> -	depends on EVENTFD
>> +config VHOST
>> +	tristate
>>   	select VHOST_IOTLB
>>   	help
>>   	  This option is selected by any driver which needs to access
>>   	  the core of vhost.
>>   
>> -if VHOST
>> +menuconfig VHOST_MENU
>> +	bool "VHOST drivers"
>> +	default y
>> +
>> +if VHOST_MENU
>>   
>>   config VHOST_NET
>>   	tristate "Host kernel accelerator for virtio net"
>>   	depends on NET && EVENTFD && (TUN || !TUN) && (TAP || !TAP)
>> +	select VHOST
>>   	---help---
>>   	  This kernel module can be loaded in host kernel to accelerate
>>   	  guest networking with virtio_net. Not to be confused with virtio_net
>> @@ -35,6 +39,7 @@ config VHOST_NET
>>   config VHOST_SCSI
>>   	tristate "VHOST_SCSI TCM fabric driver"
>>   	depends on TARGET_CORE && EVENTFD
>> +	select VHOST
>>   	default n
>>   	---help---
>>   	Say M here to enable the vhost_scsi TCM fabric module
>> @@ -43,6 +48,7 @@ config VHOST_SCSI
>>   config VHOST_VSOCK
>>   	tristate "vhost virtio-vsock driver"
>>   	depends on VSOCKETS && EVENTFD
>> +	select VHOST
>>   	select VIRTIO_VSOCKETS_COMMON
>>   	default n
>>   	---help---
>> @@ -56,6 +62,7 @@ config VHOST_VSOCK
>>   config VHOST_VDPA
>>   	tristate "Vhost driver for vDPA-based backend"
>>   	depends on EVENTFD
>> +	select VHOST


This part is not squashed.


>>   	select VDPA
>>   	help
>>   	  This kernel module can be loaded in host kernel to accelerate
> OK so I squashed this into the original buggy patch.
> Could you please play with vhost branch of my tree on various
> arches? If it looks ok to you let me know I'll push
> this to next.


With the above part squashed. I've tested all the archs whose defconfig 
have VHOST_NET or VHOST_VSOCK enabled.

All looks fine.

Thanks