* [PATCH] vhost: drop vring dependency on iotlb
@ 2020-04-02 14:12 Michael S. Tsirkin
2020-04-02 14:28 ` Jason Wang
2020-04-03 15:22 ` kbuild test robot
0 siblings, 2 replies; 5+ messages in thread
From: Michael S. Tsirkin @ 2020-04-02 14:12 UTC (permalink / raw)
To: linux-kernel; +Cc: Jason Wang, virtualization, kvm, netdev
vringh can now be built without IOTLB.
Select IOTLB directly where it's used.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
This is on top of my previous patch (in vhost tree now).
drivers/vdpa/Kconfig | 1 +
drivers/vhost/Kconfig | 1 -
2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index 7db1460104b7..08b615f2da39 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -17,6 +17,7 @@ config VDPA_SIM
depends on RUNTIME_TESTING_MENU
select VDPA
select VHOST_RING
+ select VHOST_IOTLB
default n
help
vDPA networking device simulator which loop TX traffic back
diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
index 21feea0d69c9..bdd270fede26 100644
--- a/drivers/vhost/Kconfig
+++ b/drivers/vhost/Kconfig
@@ -6,7 +6,6 @@ config VHOST_IOTLB
config VHOST_RING
tristate
- select VHOST_IOTLB
help
This option is selected by any driver which needs to access
the host side of a virtio ring.
--
MST
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] vhost: drop vring dependency on iotlb
2020-04-02 14:12 [PATCH] vhost: drop vring dependency on iotlb Michael S. Tsirkin
@ 2020-04-02 14:28 ` Jason Wang
2020-04-02 14:36 ` Michael S. Tsirkin
2020-04-03 15:22 ` kbuild test robot
1 sibling, 1 reply; 5+ messages in thread
From: Jason Wang @ 2020-04-02 14:28 UTC (permalink / raw)
To: Michael S. Tsirkin, linux-kernel; +Cc: virtualization, kvm, netdev
On 2020/4/2 下午10:12, Michael S. Tsirkin wrote:
> vringh can now be built without IOTLB.
> Select IOTLB directly where it's used.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>
> This is on top of my previous patch (in vhost tree now).
>
> drivers/vdpa/Kconfig | 1 +
> drivers/vhost/Kconfig | 1 -
> 2 files changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
> index 7db1460104b7..08b615f2da39 100644
> --- a/drivers/vdpa/Kconfig
> +++ b/drivers/vdpa/Kconfig
> @@ -17,6 +17,7 @@ config VDPA_SIM
> depends on RUNTIME_TESTING_MENU
> select VDPA
> select VHOST_RING
> + select VHOST_IOTLB
> default n
> help
> vDPA networking device simulator which loop TX traffic back
> diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
> index 21feea0d69c9..bdd270fede26 100644
> --- a/drivers/vhost/Kconfig
> +++ b/drivers/vhost/Kconfig
> @@ -6,7 +6,6 @@ config VHOST_IOTLB
>
> config VHOST_RING
> tristate
> - select VHOST_IOTLB
> help
> This option is selected by any driver which needs to access
> the host side of a virtio ring.
Do we need to mention driver need to select VHOST_IOTLB by itself here?
Thanks
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] vhost: drop vring dependency on iotlb
2020-04-02 14:28 ` Jason Wang
@ 2020-04-02 14:36 ` Michael S. Tsirkin
2020-04-02 14:59 ` Jason Wang
0 siblings, 1 reply; 5+ messages in thread
From: Michael S. Tsirkin @ 2020-04-02 14:36 UTC (permalink / raw)
To: Jason Wang; +Cc: linux-kernel, virtualization, kvm, netdev
On Thu, Apr 02, 2020 at 10:28:28PM +0800, Jason Wang wrote:
>
> On 2020/4/2 下午10:12, Michael S. Tsirkin wrote:
> > vringh can now be built without IOTLB.
> > Select IOTLB directly where it's used.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> > ---
> >
> > This is on top of my previous patch (in vhost tree now).
> >
> > drivers/vdpa/Kconfig | 1 +
> > drivers/vhost/Kconfig | 1 -
> > 2 files changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
> > index 7db1460104b7..08b615f2da39 100644
> > --- a/drivers/vdpa/Kconfig
> > +++ b/drivers/vdpa/Kconfig
> > @@ -17,6 +17,7 @@ config VDPA_SIM
> > depends on RUNTIME_TESTING_MENU
> > select VDPA
> > select VHOST_RING
> > + select VHOST_IOTLB
> > default n
> > help
> > vDPA networking device simulator which loop TX traffic back
> > diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
> > index 21feea0d69c9..bdd270fede26 100644
> > --- a/drivers/vhost/Kconfig
> > +++ b/drivers/vhost/Kconfig
> > @@ -6,7 +6,6 @@ config VHOST_IOTLB
> > config VHOST_RING
> > tristate
> > - select VHOST_IOTLB
> > help
> > This option is selected by any driver which needs to access
> > the host side of a virtio ring.
>
>
> Do we need to mention driver need to select VHOST_IOTLB by itself here?
>
> Thanks
>
OK but I guess it's best to do it near where VHOST_IOTLB is defined.
Like this?
diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
index bdd270fede26..ce51126f51e7 100644
--- a/drivers/vhost/Kconfig
+++ b/drivers/vhost/Kconfig
@@ -3,6 +3,8 @@ config VHOST_IOTLB
tristate
help
Generic IOTLB implementation for vhost and vringh.
+ This option is selected by any driver which needs to support
+ an IOMMU in software.
config VHOST_RING
tristate
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] vhost: drop vring dependency on iotlb
2020-04-02 14:36 ` Michael S. Tsirkin
@ 2020-04-02 14:59 ` Jason Wang
0 siblings, 0 replies; 5+ messages in thread
From: Jason Wang @ 2020-04-02 14:59 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: linux-kernel, virtualization, kvm, netdev
On 2020/4/2 下午10:36, Michael S. Tsirkin wrote:
> On Thu, Apr 02, 2020 at 10:28:28PM +0800, Jason Wang wrote:
>> On 2020/4/2 下午10:12, Michael S. Tsirkin wrote:
>>> vringh can now be built without IOTLB.
>>> Select IOTLB directly where it's used.
>>>
>>> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
>>> ---
>>>
>>> This is on top of my previous patch (in vhost tree now).
>>>
>>> drivers/vdpa/Kconfig | 1 +
>>> drivers/vhost/Kconfig | 1 -
>>> 2 files changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
>>> index 7db1460104b7..08b615f2da39 100644
>>> --- a/drivers/vdpa/Kconfig
>>> +++ b/drivers/vdpa/Kconfig
>>> @@ -17,6 +17,7 @@ config VDPA_SIM
>>> depends on RUNTIME_TESTING_MENU
>>> select VDPA
>>> select VHOST_RING
>>> + select VHOST_IOTLB
>>> default n
>>> help
>>> vDPA networking device simulator which loop TX traffic back
>>> diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
>>> index 21feea0d69c9..bdd270fede26 100644
>>> --- a/drivers/vhost/Kconfig
>>> +++ b/drivers/vhost/Kconfig
>>> @@ -6,7 +6,6 @@ config VHOST_IOTLB
>>> config VHOST_RING
>>> tristate
>>> - select VHOST_IOTLB
>>> help
>>> This option is selected by any driver which needs to access
>>> the host side of a virtio ring.
>>
>> Do we need to mention driver need to select VHOST_IOTLB by itself here?
>>
>> Thanks
>>
> OK but I guess it's best to do it near where VHOST_IOTLB is defined.
> Like this?
>
>
> diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
> index bdd270fede26..ce51126f51e7 100644
> --- a/drivers/vhost/Kconfig
> +++ b/drivers/vhost/Kconfig
> @@ -3,6 +3,8 @@ config VHOST_IOTLB
> tristate
> help
> Generic IOTLB implementation for vhost and vringh.
> + This option is selected by any driver which needs to support
> + an IOMMU in software.
>
> config VHOST_RING
> tristate
>
Yes, probably.
Thanks
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] vhost: drop vring dependency on iotlb
2020-04-02 14:12 [PATCH] vhost: drop vring dependency on iotlb Michael S. Tsirkin
2020-04-02 14:28 ` Jason Wang
@ 2020-04-03 15:22 ` kbuild test robot
1 sibling, 0 replies; 5+ messages in thread
From: kbuild test robot @ 2020-04-03 15:22 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 4453 bytes --]
Hi "Michael,
I love your patch! Yet something to improve:
[auto build test ERROR on vhost/linux-next]
[also build test ERROR on next-20200403]
[cannot apply to linus/master linux/master v5.6]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
url: https://github.com/0day-ci/linux/commits/Michael-S-Tsirkin/vhost-drop-vring-dependency-on-iotlb/20200403-203000
base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
config: s390-randconfig-a001-20200403 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=9.3.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
s390-linux-ld: drivers/vhost/vringh.o: in function `iotlb_translate':
>> drivers/vhost/vringh.c:1079: undefined reference to `vhost_iotlb_itree_first'
vim +1079 drivers/vhost/vringh.c
f558a845c3a043d Dave Jones 2013-05-03 1061
9ad9c49cfe970b0 Jason Wang 2020-03-26 1062 static int iotlb_translate(const struct vringh *vrh,
9ad9c49cfe970b0 Jason Wang 2020-03-26 1063 u64 addr, u64 len, struct bio_vec iov[],
9ad9c49cfe970b0 Jason Wang 2020-03-26 1064 int iov_size, u32 perm)
9ad9c49cfe970b0 Jason Wang 2020-03-26 1065 {
9ad9c49cfe970b0 Jason Wang 2020-03-26 1066 struct vhost_iotlb_map *map;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1067 struct vhost_iotlb *iotlb = vrh->iotlb;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1068 int ret = 0;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1069 u64 s = 0;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1070
9ad9c49cfe970b0 Jason Wang 2020-03-26 1071 while (len > s) {
9ad9c49cfe970b0 Jason Wang 2020-03-26 1072 u64 size, pa, pfn;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1073
9ad9c49cfe970b0 Jason Wang 2020-03-26 1074 if (unlikely(ret >= iov_size)) {
9ad9c49cfe970b0 Jason Wang 2020-03-26 1075 ret = -ENOBUFS;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1076 break;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1077 }
9ad9c49cfe970b0 Jason Wang 2020-03-26 1078
9ad9c49cfe970b0 Jason Wang 2020-03-26 @1079 map = vhost_iotlb_itree_first(iotlb, addr,
9ad9c49cfe970b0 Jason Wang 2020-03-26 1080 addr + len - 1);
9ad9c49cfe970b0 Jason Wang 2020-03-26 1081 if (!map || map->start > addr) {
9ad9c49cfe970b0 Jason Wang 2020-03-26 1082 ret = -EINVAL;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1083 break;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1084 } else if (!(map->perm & perm)) {
9ad9c49cfe970b0 Jason Wang 2020-03-26 1085 ret = -EPERM;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1086 break;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1087 }
9ad9c49cfe970b0 Jason Wang 2020-03-26 1088
9ad9c49cfe970b0 Jason Wang 2020-03-26 1089 size = map->size - addr + map->start;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1090 pa = map->addr + addr - map->start;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1091 pfn = pa >> PAGE_SHIFT;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1092 iov[ret].bv_page = pfn_to_page(pfn);
9ad9c49cfe970b0 Jason Wang 2020-03-26 1093 iov[ret].bv_len = min(len - s, size);
9ad9c49cfe970b0 Jason Wang 2020-03-26 1094 iov[ret].bv_offset = pa & (PAGE_SIZE - 1);
9ad9c49cfe970b0 Jason Wang 2020-03-26 1095 s += size;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1096 addr += size;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1097 ++ret;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1098 }
9ad9c49cfe970b0 Jason Wang 2020-03-26 1099
9ad9c49cfe970b0 Jason Wang 2020-03-26 1100 return ret;
9ad9c49cfe970b0 Jason Wang 2020-03-26 1101 }
9ad9c49cfe970b0 Jason Wang 2020-03-26 1102
:::::: The code at line 1079 was first introduced by commit
:::::: 9ad9c49cfe970b053bb0ef323b682dd1b4d4f8a0 vringh: IOTLB support
:::::: TO: Jason Wang <jasowang@redhat.com>
:::::: CC: Michael S. Tsirkin <mst@redhat.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 23597 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-04-03 15:22 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-02 14:12 [PATCH] vhost: drop vring dependency on iotlb Michael S. Tsirkin
2020-04-02 14:28 ` Jason Wang
2020-04-02 14:36 ` Michael S. Tsirkin
2020-04-02 14:59 ` Jason Wang
2020-04-03 15:22 ` kbuild test robot
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