[Xen-devel] [PATCH V1 18/29] xen/arm: Don't map disabled device in DOM0

[Julien Grall <julien.grall@xxxxxxxxxx>]

Linux should cope with 'status = "disabled"' in the Device Tree.
This solution can be used later to pass-through device to a specific guest.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

---
    Changes in v2:
        - Add a comment
---
 xen/arch/arm/domain_build.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index d56bc70a..11f247b 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -416,9 +416,13 @@ static int handle_node(struct domain *d, struct 
kernel_info *kinfo,
      *  - Device used by Xen: Obviously dom0 can't use them
      *  - Memory: the guest will see a different view of memory. It will
      *  be allocated later.
+     *  - Disabled device: Linux is able to cope with status="disabled"
+     *  property. Therefore these device doesn't need to be mapped. This
+     *  solution can be use later for pass through.
      */
     if ( dt_device_used_by(np) != DOMID_XEN &&
-         !dt_device_type_is_equal(np, "memory") )
+         !dt_device_type_is_equal(np, "memory") &&
+         dt_device_is_available(np) )
     {
         res = map_device(d, np);
 
-- 
1.7.10.4


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