Re: [Xen-devel] [PATCH] xen/arm: Blacklist PMU with "arm, cortex-a53-pmu"

[Amit Tomer <amittomer25@xxxxxxxxx>]

Hello,
>
> The proper way is to detect PPI before hand and completely skip the node if 
> any.

I tried the following change:

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index d983677..a9ecfed 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1353,7 +1353,7 @@ static int __init handle_node(struct domain *d,
struct kernel_info *kinfo,
         { /* sentinel */ },
     };
     struct dt_device_node *child;
-    int res;
+    int res, irq_id;
     const char *name;
     const char *path;

@@ -1399,6 +1399,16 @@ static int __init handle_node(struct domain *d,
struct kernel_info *kinfo,
         return 0;
     }

+    /*Skip the node, using PPI source */
+    irq_id = platform_get_irq(node, 0);
+
+    if ( irq_id > 16 && irq_id < 32 )
+    {
+        dt_dprintk(" Skip node with (PPI source)\n");
+        return 0;
+    }
+
+

After booting dom0, don't see PMU node is getting generated(its
skipped completely now).

Thanks,
-Amit.



> Julien Grall

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