diff options
Diffstat (limited to 'drivers/edac/skx_common.c')
| -rw-r--r-- | drivers/edac/skx_common.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c index 8d18099fd528..7cd074401167 100644 --- a/drivers/edac/skx_common.c +++ b/drivers/edac/skx_common.c @@ -739,6 +739,53 @@ void skx_remove(void) } EXPORT_SYMBOL_GPL(skx_remove); +#ifdef CONFIG_EDAC_DEBUG +/* + * Debug feature. + * Exercise the address decode logic by writing an address to + * /sys/kernel/debug/edac/{skx,i10nm}_test/addr. + */ +static struct dentry *skx_test; + +static int debugfs_u64_set(void *data, u64 val) +{ + struct mce m; + + pr_warn_once("Fake error to 0x%llx injected via debugfs\n", val); + + memset(&m, 0, sizeof(m)); + /* ADDRV + MemRd + Unknown channel */ + m.status = MCI_STATUS_ADDRV + 0x90; + /* One corrected error */ + m.status |= BIT_ULL(MCI_STATUS_CEC_SHIFT); + m.addr = val; + skx_mce_check_error(NULL, 0, &m); + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n"); + +void skx_setup_debug(const char *name) +{ + skx_test = edac_debugfs_create_dir(name); + if (!skx_test) + return; + + if (!edac_debugfs_create_file("addr", 0200, skx_test, + NULL, &fops_u64_wo)) { + debugfs_remove(skx_test); + skx_test = NULL; + } +} +EXPORT_SYMBOL_GPL(skx_setup_debug); + +void skx_teardown_debug(void) +{ + debugfs_remove_recursive(skx_test); +} +EXPORT_SYMBOL_GPL(skx_teardown_debug); +#endif /*CONFIG_EDAC_DEBUG*/ + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Tony Luck"); MODULE_DESCRIPTION("MC Driver for Intel server processors"); |