When a device is hot-unplugged, a sigbus error will occur of the datapath
can still read/write to the device. A handler is required here to capture
the sigbus signal and handle it appropriately.
This patch introduces a bus ops to handle sigbus errors. Each bus can
implement its own case-dependent logic to handle the sigbus errors.
Signed-off-by: Jeff Guo <jia....@intel.com>
Acked-by: Shaopeng He <shaopeng...@intel.com>
---
v13->v12:
reword the ops comment.
---
lib/librte_eal/common/include/rte_bus.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/lib/librte_eal/common/include/rte_bus.h
b/lib/librte_eal/common/include/rte_bus.h
index 1bb53dc..6be4b5c 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -182,6 +182,21 @@ typedef int (*rte_bus_parse_t)(const char *name, void
*addr);
typedef int (*rte_bus_hot_unplug_handler_t)(struct rte_device *dev);
/**
+ * Implement a specific sigbus handler, which is responsible for handling
+ * the sigbus error which is either original memory error, or specific memory
+ * error that caused of device be hot-unplugged. When sigbus error be captured,
+ * it could call this function to handle sigbus error.
+ * @param failure_addr
+ * Pointer of the fault address of the sigbus error.
+ *
+ * @return
+ * 0 for success handle the sigbus for hot-unplug.
+ * 1 for not process it, because it is a generic sigbus error.
+ * -1 for failed to handle the sigbus for hot-unplug.
+ */
+typedef int (*rte_bus_sigbus_handler_t)(const void *failure_addr);
+
+/**
* Bus scan policies
*/
enum rte_bus_scan_mode {
@@ -228,6 +243,9 @@ struct rte_bus {
rte_dev_iterate_t dev_iterate; /**< Device iterator. */
rte_bus_hot_unplug_handler_t hot_unplug_handler;
/**< handle hot-unplug failure on the bus */
+ rte_bus_sigbus_handler_t sigbus_handler;
+ /**< handle sigbus error on the bus */
+
};
/**
--
2.7.4
