* [PATCH] xen: Make XEN_BACKEND selectable by DomU
@ 2018-09-20 14:32 Jason Andryuk
2018-09-20 14:54 ` [Xen-devel] " Jan Beulich
0 siblings, 1 reply; 3+ messages in thread
From: Jason Andryuk @ 2018-09-20 14:32 UTC (permalink / raw)
To: Boris Ostrovsky, Juergen Gross; +Cc: Jason Andryuk, xen-devel, linux-kernel
XEN_BACKEND doesn't actually depend on XEN_DOM0. DomUs can serve
backends to other DomUs. One example is a service VM providing network
backends.
The original Kconfig defaulted Dom0 to y and it could be disabled. DomU
could not select the option. With the new Kconfig, we default y for
Dom0 and n for DomU. Either can then toggle the selection.
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
---
OpenXT runs network backends in a network service DomU that shares out
PCI NICs.
drivers/xen/Kconfig | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index b459edfacff3..af1bf99318c6 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -101,8 +101,7 @@ config XEN_DEV_EVTCHN
config XEN_BACKEND
bool "Backend driver support"
- depends on XEN_DOM0
- default y
+ default y if XEN_DOM0
help
Support for backend device drivers that provide I/O services
to other virtual machines.
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Xen-devel] [PATCH] xen: Make XEN_BACKEND selectable by DomU
2018-09-20 14:32 [PATCH] xen: Make XEN_BACKEND selectable by DomU Jason Andryuk
@ 2018-09-20 14:54 ` Jan Beulich
2018-09-20 15:30 ` Jason Andryuk
0 siblings, 1 reply; 3+ messages in thread
From: Jan Beulich @ 2018-09-20 14:54 UTC (permalink / raw)
To: Jason Andryuk; +Cc: xen-devel, Boris Ostrovsky, Juergen Gross, linux-kernel
>>> On 20.09.18 at 16:32, <jandryuk@gmail.com> wrote:
> --- a/drivers/xen/Kconfig
> +++ b/drivers/xen/Kconfig
> @@ -101,8 +101,7 @@ config XEN_DEV_EVTCHN
>
> config XEN_BACKEND
> bool "Backend driver support"
> - depends on XEN_DOM0
> - default y
> + default y if XEN_DOM0
Why not the simpler "default XEN_DOM0"?
Jan
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Xen-devel] [PATCH] xen: Make XEN_BACKEND selectable by DomU
2018-09-20 14:54 ` [Xen-devel] " Jan Beulich
@ 2018-09-20 15:30 ` Jason Andryuk
0 siblings, 0 replies; 3+ messages in thread
From: Jason Andryuk @ 2018-09-20 15:30 UTC (permalink / raw)
To: Jan Beulich; +Cc: xen-devel, Boris Ostrovsky, Juergen Gross, open list
On Thu, Sep 20, 2018 at 10:54 AM Jan Beulich <JBeulich@suse.com> wrote:
>
> >>> On 20.09.18 at 16:32, <jandryuk@gmail.com> wrote:
> > --- a/drivers/xen/Kconfig
> > +++ b/drivers/xen/Kconfig
> > @@ -101,8 +101,7 @@ config XEN_DEV_EVTCHN
> >
> > config XEN_BACKEND
> > bool "Backend driver support"
> > - depends on XEN_DOM0
> > - default y
> > + default y if XEN_DOM0
>
> Why not the simpler "default XEN_DOM0"?
I didn't realize you could do that. :) Yes, that's nicer.
Thanks,
Jason
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2018-09-20 15:30 UTC | newest]
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2018-09-20 14:32 [PATCH] xen: Make XEN_BACKEND selectable by DomU Jason Andryuk
2018-09-20 14:54 ` [Xen-devel] " Jan Beulich
2018-09-20 15:30 ` Jason Andryuk
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