[Xen-devel] [PATCH v2] xen: arm: Do not expose PMU to domain 0

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

It uses a PPI which we cannot route to a guest, and will surely need
more support than just that anyway.

I noticed this on Mustang with UEFI where the built in DTB contains a
node of this type.

According to linux/Documentation/devicetree/bindings/arm/pmu.txt the
ARM v7 (Cortex-A{7,15}) PMUs require a PPI too, so blacklist them as
well.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/domain_build.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 1e545fe..e9cb8a9 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1105,6 +1105,9 @@ static int handle_node(struct domain *d, struct 
kernel_info *kinfo,
         DT_MATCH_COMPATIBLE("multiboot,module"),
         DT_MATCH_COMPATIBLE("arm,psci"),
         DT_MATCH_COMPATIBLE("arm,psci-0.2"),
+        DT_MATCH_COMPATIBLE("arm,cortex-a7-pmu"),
+        DT_MATCH_COMPATIBLE("arm,cortex-a15-pmu"),
+        DT_MATCH_COMPATIBLE("arm,armv8-pmuv3"),
         DT_MATCH_PATH("/cpus"),
         DT_MATCH_TYPE("memory"),
         /* The memory mapped timer is not supported by Xen. */
-- 
1.7.10.4


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