Add new entry point to scan the device tree at boot in a guest,
looking for CAPI devices.
Co-authored-by: Christophe Lombard <clomb...@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbar...@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clomb...@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imun...@au1.ibm.com>
---
drivers/misc/cxl/base.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/misc/cxl/base.c b/drivers/misc/cxl/base.c
index 957f4dd..9b90ec6 100644
--- a/drivers/misc/cxl/base.c
+++ b/drivers/misc/cxl/base.c
@@ -11,6 +11,7 @@
#include <linux/rcupdate.h>
#include <asm/errno.h>
#include <misc/cxl-base.h>
+#include <linux/of_platform.h>
#include "cxl.h"
/* protected by rcu */
@@ -91,3 +92,27 @@ int cxl_update_properties(struct device_node *dn,
return of_update_property(dn, new_prop);
}
EXPORT_SYMBOL_GPL(cxl_update_properties);
+
+static int __init cxl_base_init(void)
+{
+ struct device_node *np = NULL;
+ struct platform_device *dev;
+ int count = 0;
+
+ /*
+ * Scan for compatible devices in guest only
+ */
+ if (cpu_has_feature(CPU_FTR_HVMODE))
+ return 0;
+
+ while ((np = of_find_compatible_node(np, NULL,
+ "ibm,coherent-platform-facility"))) {
+ dev = of_platform_device_create(np, NULL, NULL);
+ if (dev)
+ count++;
+ }
+ pr_devel("Found %d cxl device(s)\n", count);
+ return 0;
+}
+
+module_init(cxl_base_init);
--
1.9.1
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