[Xen-devel] [RFC v1 7/8] xen: unwrap XEN_BACKEND from XEN_DOM0

["Luis R. Rodriguez" <mcgrof@xxxxxxxxxxxxxxxx>]

From: "Luis R. Rodriguez" <mcgrof@xxxxxxxx>

This unwraps XEN_BACKEND from depending on XEN_DOM0, it
instead makes it depend on the possible x86 backends and
under what scenerios its allowed under ARM. This is as per
the agreed upon Xen Kconfig changes [0].

[0] http://comments.gmane.org/gmane.comp.emulators.xen.devel/231579

Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxx>
---
 arch/x86/xen/Kconfig | 2 ++
 drivers/xen/Kconfig  | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 50e2fb4..9298eb3 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -16,8 +16,10 @@ config XEN
 
 config XEN_DOM0
        def_bool y
+       select XEN_BACKEND
        depends on XEN && PCI_XEN && SWIOTLB_XEN
        depends on X86_LOCAL_APIC && X86_IO_APIC && ACPI && PCI
+       depends on XEN_PV || XEN_PVH
 
 config XEN_PVHVM
        def_bool y
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 31391bc..d8bd3f6 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -77,7 +77,8 @@ config XEN_DEV_EVTCHN
 
 config XEN_BACKEND
        bool "Backend driver support"
-       depends on XEN_DOM0
+       depends on ARM || ARM64 || (X86 && (XEN_PV || XEN_PVH || XEN_PVHVM))
+       select SWIOTLB_XEN if ARM || ARM64
        default y
        help
          Support for backend device drivers that provide I/O services
-- 
2.2.2


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