[Xen-devel] [RFC 21/24] xen/arm: vexpress: Blacklist a list of board specific devices

[Julien Grall <julien.grall@xxxxxxxxxx>]

On Versatile there is a bunch of devices that must not pass-through to any
guest (power management and cache coherency devices).

This commit also blacklist the HDLCD device because then is unable to correctly
map the framebuffer. Therefore, when Linux will try to access to the 
framebuffer,
Xen will receive a non-handled data access.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/platforms/vexpress.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/xen/arch/arm/platforms/vexpress.c 
b/xen/arch/arm/platforms/vexpress.c
index 8fc30c4..ece7bd9 100644
--- a/xen/arch/arm/platforms/vexpress.c
+++ b/xen/arch/arm/platforms/vexpress.c
@@ -125,9 +125,26 @@ static const char const *vexpress_dt_compat[] __initdata =
     NULL
 };
 
+static const struct dt_device_match vexpress_blacklist_dev[] __initconst =
+{
+    /* Cache Coherent Interconnect */
+    DT_MATCH_COMPATIBLE("arm,cci-400"),
+    DT_MATCH_COMPATIBLE("arm,cci-400-pmu"),
+    /* Video device
+     * TODO: remove it once memreserve is handled properly by Xen
+     */
+    DT_MATCH_COMPATIBLE("arm,hdlcd"),
+    /* Hardware power management */
+    DT_MATCH_COMPATIBLE("arm,vexpress-reset"),
+    DT_MATCH_COMPATIBLE("arm,vexpress-reboot"),
+    DT_MATCH_COMPATIBLE("arm,vexpress-shutdown"),
+    { /* sentinel */ },
+};
+
 PLATFORM_START(vexpress, "VERSATILE EXPRESS")
     .compatible = vexpress_dt_compat,
     .reset = vexpress_reset,
+    .blacklist_dev = vexpress_blacklist_dev,
 PLATFORM_END
 
 /*
-- 
1.7.10.4


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