From ba9f0951da9c47d8504d549f692fe154027fa587 Mon Sep 17 00:00:00 2001 From: Julien Grall Date: Wed, 15 Jun 2016 14:40:48 +0100 Subject: [PATCH] xen/arm: gic-v2: Only create GICv2m node when there are GICv2m frame available Xen will crash on platform where GICv2m is not available with the following error: (XEN) Can't find ranges property for the gic node (XEN) Device tree generation failed (-15). (XEN) (XEN) **************************************** (XEN) Panic on CPU 0: (XEN) Could not set up DOM0 guest OS (XEN) **************************************** This is because the property "ranges" may not be present in the GIC when there are no GICv2m frames. Skip the creation of the GICv2m node when the hardware does not support it. This fixes boot after commit "xen/arm: Export GICv2m register frames to DOM0 by device tree". Signed-off-by: Julien Grall Reviewed-by: Stefano Stabellini Acked-by: Wei Chen --- xen/arch/arm/gic-v2.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/xen/arch/arm/gic-v2.c b/xen/arch/arm/gic-v2.c index 2c1c0baa26..4e2f4c7b67 100644 --- a/xen/arch/arm/gic-v2.c +++ b/xen/arch/arm/gic-v2.c @@ -669,6 +669,10 @@ static int gicv2m_make_dt_node(const struct domain *d, const struct dt_device_node *v2m = NULL; const struct v2m_data *v2m_data; + /* It is not necessary to create the node if there are not GICv2m frames */ + if ( list_empty(&gicv2m_info) ) + return 0; + /* The sub-nodes require the ranges property */ prop = dt_get_property(gic, "ranges", &len); if ( !prop ) -- 2.30.2