2 * APEI Error INJection support
4 * EINJ provides a hardware error injection mechanism, this is useful
5 * for debugging and testing of other APEI and RAS features.
7 * For more information about EINJ, please refer to ACPI Specification
8 * version 4.0, section 17.5.
10 * Copyright 2009-2010 Intel Corp.
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License version
15 * 2 as published by the Free Software Foundation.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/init.h>
27 #include <linux/debugfs.h>
28 #include <linux/seq_file.h>
29 #include <linux/nmi.h>
30 #include <linux/delay.h>
32 #include <asm/unaligned.h>
34 #include "apei-internal.h"
37 #define pr_fmt(fmt) "EINJ: " fmt
39 #define SPIN_UNIT 100 /* 100ns */
40 /* Firmware should respond within 1 milliseconds */
41 #define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC)
42 #define ACPI5_VENDOR_BIT BIT(31)
43 #define MEM_ERROR_MASK (ACPI_EINJ_MEMORY_CORRECTABLE | \
44 ACPI_EINJ_MEMORY_UNCORRECTABLE | \
45 ACPI_EINJ_MEMORY_FATAL)
48 * ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action.
52 struct set_error_type_with_address {
58 u64 memory_address_range;
62 SETWA_FLAGS_APICID = 1,
64 SETWA_FLAGS_PCIE_SBDF = 4,
68 * Vendor extensions for platform specific operations
70 struct vendor_error_type_extension {
81 static u32 vendor_flags;
82 static struct debugfs_blob_wrapper vendor_blob;
83 static char vendor_dev[64];
86 * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
87 * EINJ table through an unpublished extension. Use with caution as
88 * most will ignore the parameter and make their own choice of address
89 * for error injection. This extension is used only if
90 * param_extension module parameter is specified.
92 struct einj_parameter {
100 #define EINJ_OP_BUSY 0x1
101 #define EINJ_STATUS_SUCCESS 0x0
102 #define EINJ_STATUS_FAIL 0x1
103 #define EINJ_STATUS_INVAL 0x2
105 #define EINJ_TAB_ENTRY(tab) \
106 ((struct acpi_whea_header *)((char *)(tab) + \
107 sizeof(struct acpi_table_einj)))
109 static bool param_extension;
110 module_param(param_extension, bool, 0);
112 static struct acpi_table_einj *einj_tab;
114 static struct apei_resources einj_resources;
116 static struct apei_exec_ins_type einj_ins_type[] = {
117 [ACPI_EINJ_READ_REGISTER] = {
118 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
119 .run = apei_exec_read_register,
121 [ACPI_EINJ_READ_REGISTER_VALUE] = {
122 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
123 .run = apei_exec_read_register_value,
125 [ACPI_EINJ_WRITE_REGISTER] = {
126 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
127 .run = apei_exec_write_register,
129 [ACPI_EINJ_WRITE_REGISTER_VALUE] = {
130 .flags = APEI_EXEC_INS_ACCESS_REGISTER,
131 .run = apei_exec_write_register_value,
135 .run = apei_exec_noop,
140 * Prevent EINJ interpreter to run simultaneously, because the
141 * corresponding firmware implementation may not work properly when
142 * invoked simultaneously.
144 static DEFINE_MUTEX(einj_mutex);
146 static void *einj_param;
148 static void einj_exec_ctx_init(struct apei_exec_context *ctx)
150 apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type),
151 EINJ_TAB_ENTRY(einj_tab), einj_tab->entries);
154 static int __einj_get_available_error_type(u32 *type)
156 struct apei_exec_context ctx;
159 einj_exec_ctx_init(&ctx);
160 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE);
163 *type = apei_exec_ctx_get_output(&ctx);
168 /* Get error injection capabilities of the platform */
169 static int einj_get_available_error_type(u32 *type)
173 mutex_lock(&einj_mutex);
174 rc = __einj_get_available_error_type(type);
175 mutex_unlock(&einj_mutex);
180 static int einj_timedout(u64 *t)
182 if ((s64)*t < SPIN_UNIT) {
183 pr_warning(FW_WARN "Firmware does not respond in time\n");
188 touch_nmi_watchdog();
192 static void check_vendor_extension(u64 paddr,
193 struct set_error_type_with_address *v5param)
195 int offset = v5param->vendor_extension;
196 struct vendor_error_type_extension *v;
201 v = acpi_os_map_iomem(paddr + offset, sizeof(*v));
205 sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n",
206 sbdf >> 24, (sbdf >> 16) & 0xff,
207 (sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7,
208 v->vendor_id, v->device_id, v->rev_id);
209 acpi_os_unmap_iomem(v, sizeof(*v));
212 static void *einj_get_parameter_address(void)
215 u64 pa_v4 = 0, pa_v5 = 0;
216 struct acpi_whea_header *entry;
218 entry = EINJ_TAB_ENTRY(einj_tab);
219 for (i = 0; i < einj_tab->entries; i++) {
220 if (entry->action == ACPI_EINJ_SET_ERROR_TYPE &&
221 entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
222 entry->register_region.space_id ==
223 ACPI_ADR_SPACE_SYSTEM_MEMORY)
224 pa_v4 = get_unaligned(&entry->register_region.address);
225 if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS &&
226 entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
227 entry->register_region.space_id ==
228 ACPI_ADR_SPACE_SYSTEM_MEMORY)
229 pa_v5 = get_unaligned(&entry->register_region.address);
233 struct set_error_type_with_address *v5param;
235 v5param = acpi_os_map_iomem(pa_v5, sizeof(*v5param));
238 check_vendor_extension(pa_v5, v5param);
242 if (param_extension && pa_v4) {
243 struct einj_parameter *v4param;
245 v4param = acpi_os_map_iomem(pa_v4, sizeof(*v4param));
248 if (v4param->reserved1 || v4param->reserved2) {
249 acpi_os_unmap_iomem(v4param, sizeof(*v4param));
258 /* do sanity check to trigger table */
259 static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
261 if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger))
263 if (trigger_tab->table_size > PAGE_SIZE ||
264 trigger_tab->table_size < trigger_tab->header_size)
266 if (trigger_tab->entry_count !=
267 (trigger_tab->table_size - trigger_tab->header_size) /
268 sizeof(struct acpi_einj_entry))
274 static struct acpi_generic_address *einj_get_trigger_parameter_region(
275 struct acpi_einj_trigger *trigger_tab, u64 param1, u64 param2)
278 struct acpi_whea_header *entry;
280 entry = (struct acpi_whea_header *)
281 ((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
282 for (i = 0; i < trigger_tab->entry_count; i++) {
283 if (entry->action == ACPI_EINJ_TRIGGER_ERROR &&
284 entry->instruction == ACPI_EINJ_WRITE_REGISTER_VALUE &&
285 entry->register_region.space_id ==
286 ACPI_ADR_SPACE_SYSTEM_MEMORY &&
287 (entry->register_region.address & param2) == (param1 & param2))
288 return &entry->register_region;
294 /* Execute instructions in trigger error action table */
295 static int __einj_error_trigger(u64 trigger_paddr, u32 type,
296 u64 param1, u64 param2)
298 struct acpi_einj_trigger *trigger_tab = NULL;
299 struct apei_exec_context trigger_ctx;
300 struct apei_resources trigger_resources;
301 struct acpi_whea_header *trigger_entry;
305 struct acpi_generic_address *trigger_param_region = NULL;
307 r = request_mem_region(trigger_paddr, sizeof(*trigger_tab),
308 "APEI EINJ Trigger Table");
310 pr_err("Can not request [mem %#010llx-%#010llx] for Trigger table\n",
311 (unsigned long long)trigger_paddr,
312 (unsigned long long)trigger_paddr +
313 sizeof(*trigger_tab) - 1);
316 trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab));
318 pr_err("Failed to map trigger table!\n");
321 rc = einj_check_trigger_header(trigger_tab);
323 pr_warning(FW_BUG "Invalid trigger error action table.\n");
327 /* No action structures in the TRIGGER_ERROR table, nothing to do */
328 if (!trigger_tab->entry_count)
332 table_size = trigger_tab->table_size;
333 r = request_mem_region(trigger_paddr + sizeof(*trigger_tab),
334 table_size - sizeof(*trigger_tab),
335 "APEI EINJ Trigger Table");
337 pr_err("Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n",
338 (unsigned long long)trigger_paddr + sizeof(*trigger_tab),
339 (unsigned long long)trigger_paddr + table_size - 1);
342 iounmap(trigger_tab);
343 trigger_tab = ioremap_cache(trigger_paddr, table_size);
345 pr_err("Failed to map trigger table!\n");
348 trigger_entry = (struct acpi_whea_header *)
349 ((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
350 apei_resources_init(&trigger_resources);
351 apei_exec_ctx_init(&trigger_ctx, einj_ins_type,
352 ARRAY_SIZE(einj_ins_type),
353 trigger_entry, trigger_tab->entry_count);
354 rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources);
357 rc = apei_resources_sub(&trigger_resources, &einj_resources);
361 * Some firmware will access target address specified in
362 * param1 to trigger the error when injecting memory error.
363 * This will cause resource conflict with regular memory. So
364 * remove it from trigger table resources.
366 if ((param_extension || acpi5) && (type & MEM_ERROR_MASK) && param2) {
367 struct apei_resources addr_resources;
368 apei_resources_init(&addr_resources);
369 trigger_param_region = einj_get_trigger_parameter_region(
370 trigger_tab, param1, param2);
371 if (trigger_param_region) {
372 rc = apei_resources_add(&addr_resources,
373 trigger_param_region->address,
374 trigger_param_region->bit_width/8, true);
377 rc = apei_resources_sub(&trigger_resources,
380 apei_resources_fini(&addr_resources);
384 rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger");
387 rc = apei_exec_pre_map_gars(&trigger_ctx);
391 rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR);
393 apei_exec_post_unmap_gars(&trigger_ctx);
395 apei_resources_release(&trigger_resources);
397 apei_resources_fini(&trigger_resources);
399 release_mem_region(trigger_paddr + sizeof(*trigger_tab),
400 table_size - sizeof(*trigger_tab));
402 release_mem_region(trigger_paddr, sizeof(*trigger_tab));
405 iounmap(trigger_tab);
410 static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
411 u64 param3, u64 param4)
413 struct apei_exec_context ctx;
414 u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT;
417 einj_exec_ctx_init(&ctx);
419 rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION);
422 apei_exec_ctx_set_input(&ctx, type);
424 struct set_error_type_with_address *v5param = einj_param;
426 v5param->type = type;
427 if (type & ACPI5_VENDOR_BIT) {
428 switch (vendor_flags) {
429 case SETWA_FLAGS_APICID:
430 v5param->apicid = param1;
432 case SETWA_FLAGS_MEM:
433 v5param->memory_address = param1;
434 v5param->memory_address_range = param2;
436 case SETWA_FLAGS_PCIE_SBDF:
437 v5param->pcie_sbdf = param1;
440 v5param->flags = vendor_flags;
442 v5param->flags = flags;
443 v5param->memory_address = param1;
444 v5param->memory_address_range = param2;
445 v5param->apicid = param3;
446 v5param->pcie_sbdf = param4;
449 case ACPI_EINJ_PROCESSOR_CORRECTABLE:
450 case ACPI_EINJ_PROCESSOR_UNCORRECTABLE:
451 case ACPI_EINJ_PROCESSOR_FATAL:
452 v5param->apicid = param1;
453 v5param->flags = SETWA_FLAGS_APICID;
455 case ACPI_EINJ_MEMORY_CORRECTABLE:
456 case ACPI_EINJ_MEMORY_UNCORRECTABLE:
457 case ACPI_EINJ_MEMORY_FATAL:
458 v5param->memory_address = param1;
459 v5param->memory_address_range = param2;
460 v5param->flags = SETWA_FLAGS_MEM;
462 case ACPI_EINJ_PCIX_CORRECTABLE:
463 case ACPI_EINJ_PCIX_UNCORRECTABLE:
464 case ACPI_EINJ_PCIX_FATAL:
465 v5param->pcie_sbdf = param1;
466 v5param->flags = SETWA_FLAGS_PCIE_SBDF;
471 rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
475 struct einj_parameter *v4param = einj_param;
476 v4param->param1 = param1;
477 v4param->param2 = param2;
480 rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
484 rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS);
487 val = apei_exec_ctx_get_output(&ctx);
488 if (!(val & EINJ_OP_BUSY))
490 if (einj_timedout(&timeout))
493 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS);
496 val = apei_exec_ctx_get_output(&ctx);
497 if (val != EINJ_STATUS_SUCCESS)
500 rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE);
503 trigger_paddr = apei_exec_ctx_get_output(&ctx);
504 if (notrigger == 0) {
505 rc = __einj_error_trigger(trigger_paddr, type, param1, param2);
509 rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);
514 /* Inject the specified hardware error */
515 static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
516 u64 param3, u64 param4)
521 /* If user manually set "flags", make sure it is legal */
522 if (flags && (flags &
523 ~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF)))
527 * We need extra sanity checks for memory errors.
528 * Other types leap directly to injection.
531 /* ensure param1/param2 existed */
532 if (!(param_extension || acpi5))
535 /* ensure injection is memory related */
536 if (type & ACPI5_VENDOR_BIT) {
537 if (vendor_flags != SETWA_FLAGS_MEM)
539 } else if (!(type & MEM_ERROR_MASK) && !(flags & SETWA_FLAGS_MEM))
543 * Disallow crazy address masks that give BIOS leeway to pick
544 * injection address almost anywhere. Insist on page or
545 * better granularity and that target address is normal RAM or
548 base_addr = param1 & param2;
551 if (((param2 & PAGE_MASK) != PAGE_MASK) ||
552 ((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)
553 != REGION_INTERSECTS) &&
554 (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY)
555 != REGION_INTERSECTS)))
559 mutex_lock(&einj_mutex);
560 rc = __einj_error_inject(type, flags, param1, param2, param3, param4);
561 mutex_unlock(&einj_mutex);
566 static u32 error_type;
567 static u32 error_flags;
568 static u64 error_param1;
569 static u64 error_param2;
570 static u64 error_param3;
571 static u64 error_param4;
572 static struct dentry *einj_debug_dir;
574 static int available_error_type_show(struct seq_file *m, void *v)
577 u32 available_error_type = 0;
579 rc = einj_get_available_error_type(&available_error_type);
582 if (available_error_type & 0x0001)
583 seq_printf(m, "0x00000001\tProcessor Correctable\n");
584 if (available_error_type & 0x0002)
585 seq_printf(m, "0x00000002\tProcessor Uncorrectable non-fatal\n");
586 if (available_error_type & 0x0004)
587 seq_printf(m, "0x00000004\tProcessor Uncorrectable fatal\n");
588 if (available_error_type & 0x0008)
589 seq_printf(m, "0x00000008\tMemory Correctable\n");
590 if (available_error_type & 0x0010)
591 seq_printf(m, "0x00000010\tMemory Uncorrectable non-fatal\n");
592 if (available_error_type & 0x0020)
593 seq_printf(m, "0x00000020\tMemory Uncorrectable fatal\n");
594 if (available_error_type & 0x0040)
595 seq_printf(m, "0x00000040\tPCI Express Correctable\n");
596 if (available_error_type & 0x0080)
597 seq_printf(m, "0x00000080\tPCI Express Uncorrectable non-fatal\n");
598 if (available_error_type & 0x0100)
599 seq_printf(m, "0x00000100\tPCI Express Uncorrectable fatal\n");
600 if (available_error_type & 0x0200)
601 seq_printf(m, "0x00000200\tPlatform Correctable\n");
602 if (available_error_type & 0x0400)
603 seq_printf(m, "0x00000400\tPlatform Uncorrectable non-fatal\n");
604 if (available_error_type & 0x0800)
605 seq_printf(m, "0x00000800\tPlatform Uncorrectable fatal\n");
610 static int available_error_type_open(struct inode *inode, struct file *file)
612 return single_open(file, available_error_type_show, NULL);
615 static const struct file_operations available_error_type_fops = {
616 .open = available_error_type_open,
619 .release = single_release,
622 static int error_type_get(void *data, u64 *val)
629 static int error_type_set(void *data, u64 val)
632 u32 available_error_type = 0;
636 * Vendor defined types have 0x80000000 bit set, and
637 * are not enumerated by ACPI_EINJ_GET_ERROR_TYPE
639 vendor = val & ACPI5_VENDOR_BIT;
640 tval = val & 0x7fffffff;
642 /* Only one error type can be specified */
643 if (tval & (tval - 1))
646 rc = einj_get_available_error_type(&available_error_type);
649 if (!(val & available_error_type))
657 DEFINE_SIMPLE_ATTRIBUTE(error_type_fops, error_type_get,
658 error_type_set, "0x%llx\n");
660 static int error_inject_set(void *data, u64 val)
665 return einj_error_inject(error_type, error_flags, error_param1, error_param2,
666 error_param3, error_param4);
669 DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL,
670 error_inject_set, "%llu\n");
672 static int einj_check_table(struct acpi_table_einj *einj_tab)
674 if ((einj_tab->header_length !=
675 (sizeof(struct acpi_table_einj) - sizeof(einj_tab->header)))
676 && (einj_tab->header_length != sizeof(struct acpi_table_einj)))
678 if (einj_tab->header.length < sizeof(struct acpi_table_einj))
680 if (einj_tab->entries !=
681 (einj_tab->header.length - sizeof(struct acpi_table_einj)) /
682 sizeof(struct acpi_einj_entry))
688 static int __init einj_init(void)
692 struct dentry *fentry;
693 struct apei_exec_context ctx;
696 pr_warn("ACPI disabled.\n");
700 status = acpi_get_table(ACPI_SIG_EINJ, 0,
701 (struct acpi_table_header **)&einj_tab);
702 if (status == AE_NOT_FOUND) {
703 pr_warn("EINJ table not found.\n");
706 else if (ACPI_FAILURE(status)) {
707 pr_err("Failed to get EINJ table: %s\n",
708 acpi_format_exception(status));
712 rc = einj_check_table(einj_tab);
714 pr_warn(FW_BUG "Invalid EINJ table.n");
719 einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
720 if (!einj_debug_dir) {
721 pr_err("Error creating debugfs node.\n");
725 fentry = debugfs_create_file("available_error_type", S_IRUSR,
726 einj_debug_dir, NULL,
727 &available_error_type_fops);
731 fentry = debugfs_create_file("error_type", S_IRUSR | S_IWUSR,
732 einj_debug_dir, NULL, &error_type_fops);
735 fentry = debugfs_create_file("error_inject", S_IWUSR,
736 einj_debug_dir, NULL, &error_inject_fops);
740 apei_resources_init(&einj_resources);
741 einj_exec_ctx_init(&ctx);
742 rc = apei_exec_collect_resources(&ctx, &einj_resources);
744 pr_err("Error collecting EINJ resources.\n");
748 rc = apei_resources_request(&einj_resources, "APEI EINJ");
750 pr_err("Error requesting memory/port resources.\n");
754 rc = apei_exec_pre_map_gars(&ctx);
756 pr_err("Error pre-mapping GARs.\n");
761 einj_param = einj_get_parameter_address();
762 if ((param_extension || acpi5) && einj_param) {
763 fentry = debugfs_create_x32("flags", S_IRUSR | S_IWUSR,
764 einj_debug_dir, &error_flags);
767 fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
768 einj_debug_dir, &error_param1);
771 fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
772 einj_debug_dir, &error_param2);
775 fentry = debugfs_create_x64("param3", S_IRUSR | S_IWUSR,
776 einj_debug_dir, &error_param3);
779 fentry = debugfs_create_x64("param4", S_IRUSR | S_IWUSR,
780 einj_debug_dir, &error_param4);
784 fentry = debugfs_create_x32("notrigger", S_IRUSR | S_IWUSR,
785 einj_debug_dir, ¬rigger);
791 vendor_blob.data = vendor_dev;
792 vendor_blob.size = strlen(vendor_dev);
793 fentry = debugfs_create_blob("vendor", S_IRUSR,
794 einj_debug_dir, &vendor_blob);
797 fentry = debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR,
798 einj_debug_dir, &vendor_flags);
803 pr_info("Error INJection is initialized.\n");
809 acpi_size size = (acpi5) ?
810 sizeof(struct set_error_type_with_address) :
811 sizeof(struct einj_parameter);
813 acpi_os_unmap_iomem(einj_param, size);
814 pr_err("Error creating param extension debugfs nodes.\n");
816 apei_exec_post_unmap_gars(&ctx);
818 apei_resources_release(&einj_resources);
820 apei_resources_fini(&einj_resources);
822 pr_err("Error creating primary debugfs nodes.\n");
823 debugfs_remove_recursive(einj_debug_dir);
828 static void __exit einj_exit(void)
830 struct apei_exec_context ctx;
833 acpi_size size = (acpi5) ?
834 sizeof(struct set_error_type_with_address) :
835 sizeof(struct einj_parameter);
837 acpi_os_unmap_iomem(einj_param, size);
839 einj_exec_ctx_init(&ctx);
840 apei_exec_post_unmap_gars(&ctx);
841 apei_resources_release(&einj_resources);
842 apei_resources_fini(&einj_resources);
843 debugfs_remove_recursive(einj_debug_dir);
846 module_init(einj_init);
847 module_exit(einj_exit);
849 MODULE_AUTHOR("Huang Ying");
850 MODULE_DESCRIPTION("APEI Error INJection support");
851 MODULE_LICENSE("GPL");