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RAS/CEC: Add CONFIG_RAS_CEC_DEBUG and move CEC debug features there

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The pfn and array files in (debugfs)/ras/cec are intended for debugging
the CEC code itself. They are not needed on production systems, so the
default setting for this CONFIG option is "n".

 [ bp: Have it with less ifdeffery by using IS_ENABLED(). ]

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Tony Luck 2019-05-06 13:13:22 +02:00 committed by Borislav Petkov
parent f57518cd56
commit 60fd42d26c
2 changed files with 24 additions and 12 deletions
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10
arch/x86/ras/Kconfig
View File

@ -11,3 +11,13 @@ config RAS_CEC
Bear in mind that this is absolutely useless if your platform doesn't Bear in mind that this is absolutely useless if your platform doesn't
have ECC DIMMs and doesn't have DRAM ECC checking enabled in the BIOS. have ECC DIMMs and doesn't have DRAM ECC checking enabled in the BIOS.
config RAS_CEC_DEBUG
bool "CEC debugging machinery"
default n
depends on RAS_CEC
help
Add extra files to (debugfs)/ras/cec to test the correctable error
collector feature. "pfn" is a writable file that allows user to
simulate an error in a particular page frame. "array" is a read-only
file that dumps out the current state of all pages logged so far.

26
drivers/ras/cec.c
View File

@ -486,18 +486,6 @@ static int __init create_debugfs_nodes(void)
return -1; return -1;
} }
pfn = debugfs_create_file("pfn", S_IRUSR | S_IWUSR, d, &dfs_pfn, &pfn_ops);
if (!pfn) {
pr_warn("Error creating pfn debugfs node!\n");
goto err;
}
array = debugfs_create_file("array", S_IRUSR, d, NULL, &array_ops);
if (!array) {
pr_warn("Error creating array debugfs node!\n");
goto err;
}
decay = debugfs_create_file("decay_interval", S_IRUSR | S_IWUSR, d, decay = debugfs_create_file("decay_interval", S_IRUSR | S_IWUSR, d,
&decay_interval, &decay_interval_ops); &decay_interval, &decay_interval_ops);
if (!decay) { if (!decay) {
@ -512,6 +500,20 @@ static int __init create_debugfs_nodes(void)
goto err; goto err;
} }
if (!IS_ENABLED(CONFIG_RAS_CEC_DEBUG))
return 0;
pfn = debugfs_create_file("pfn", S_IRUSR | S_IWUSR, d, &dfs_pfn, &pfn_ops);
if (!pfn) {
pr_warn("Error creating pfn debugfs node!\n");
goto err;
}
array = debugfs_create_file("array", S_IRUSR, d, NULL, &array_ops);
if (!array) {
pr_warn("Error creating array debugfs node!\n");
goto err;
}
return 0; return 0;