debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

 kernel/drivers/firmware/arm_sdei.c
..
..
@@ -1140,14 +1140,14 @@
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1140
 	return true;
1141
1141
 }
1142
1142
 
1143
-static int __init sdei_init(void)
1143
+void __init sdei_init(void)
1144
1144
 {
1145
1145
 	struct platform_device *pdev;
1146
1146
 	int ret;
1147
1147
 
1148
1148
 	ret = platform_driver_register(&sdei_driver);
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 	if (ret || !sdei_present_acpi())
1150
-		return ret;
1150
+		return;
1151
1151
 
1152
1152
 	pdev = platform_device_register_simple(sdei_driver.driver.name,
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1153
 					       0, NULL, 0);
..
..
@@ -1157,16 +1157,7 @@
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1157
 		pr_info("Failed to register ACPI:SDEI platform device %d\n",
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1158
 			ret);
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1159
 	}
1160
-
1161
-	return ret;
1162
1160
 }
1163
-
1164
-/*
1165
- * On an ACPI system SDEI needs to be ready before HEST:GHES tries to register
1166
- * its events. ACPI is initialised from a subsys_initcall(), GHES is initialised
1167
- * by device_initcall(). We want to be called in the middle.
1168
- */
1169
-subsys_initcall_sync(sdei_init);
1170
1161
 
1171
1162
 int sdei_event_handler(struct pt_regs *regs,
1172
1163
 		       struct sdei_registered_event *arg)
..
..
@@ -1195,3 +1186,22 @@
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1186
 	return err;
1196
1187
 }
1197
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 NOKPROBE_SYMBOL(sdei_event_handler);
1189
+
1190
+void sdei_handler_abort(void)
1191
+{
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+	/*
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+	 * If the crash happened in an SDEI event handler then we need to
1194
+	 * finish the handler with the firmware so that we can have working
1195
+	 * interrupts in the crash kernel.
1196
+	 */
1197
+	if (__this_cpu_read(sdei_active_critical_event)) {
1198
+	        pr_warn("still in SDEI critical event context, attempting to finish handler.\n");
1199
+	        __sdei_handler_abort();
1200
+	        __this_cpu_write(sdei_active_critical_event, NULL);
1201
+	}
1202
+	if (__this_cpu_read(sdei_active_normal_event)) {
1203
+	        pr_warn("still in SDEI normal event context, attempting to finish handler.\n");
1204
+	        __sdei_handler_abort();
1205
+	        __this_cpu_write(sdei_active_normal_event, NULL);
1206
+	}
1207
+}