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* [PATCH] xen: Make XEN_BACKEND selectable by DomU
@ 2018-09-20 14:32 Jason Andryuk
  2018-09-20 14:54 ` [Xen-devel] " Jan Beulich
  2018-09-20 14:54 ` Jan Beulich
  0 siblings, 2 replies; 6+ 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] 6+ messages in thread
* [PATCH] xen: Make XEN_BACKEND selectable by DomU
@ 2018-09-20 14:32 Jason Andryuk
  0 siblings, 0 replies; 6+ messages in thread
From: Jason Andryuk @ 2018-09-20 14:32 UTC (permalink / raw)
  To: Boris Ostrovsky, Juergen Gross; +Cc: xen-devel, linux-kernel, Jason Andryuk

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


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^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-09-20 15:30 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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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
2018-09-20 15:30   ` [Xen-devel] " Jason Andryuk
2018-09-20 14:54 ` Jan Beulich
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2018-09-20 14:32 Jason Andryuk

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