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authorQiuxu Zhuo <qiuxu.zhuo@intel.com>2018-11-16 07:35:05 (GMT)
committerBorislav Petkov <bp@suse.de>2018-11-16 10:19:53 (GMT)
commitfa1c071c1efb28baef2409e28c186d40c76d7839 (patch)
tree3e6e525617d11b3c87eff5788f84610b84e2dbef /drivers/edac
parent85b9c8bfee67ed151c44861c71adc816fc1b46a9 (diff)
EDAC, skx: Let EDAC core show the decoded result for debugfs
Current debugfs shows the decoded result in its own print format which is inconvenient for analysis/statistics. Use skx_mce_check_error() instead of skx_decode() for debugfs, then the decoded result is showed via EDAC core in a more readable format like "CPU_SrcID#[0-9]_MC#[0-9]_Chan#[0-9]_DIMM#[0-9]". Print a warning the first time this interface is used so the administrator can see the console log that error(s) have been faked. Co-developed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> CC: Mauro Carvalho Chehab <mchehab@kernel.org> CC: arozansk@redhat.com CC: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/1542353705-13531-1-git-send-email-qiuxu.zhuo@intel.com
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/skx_edac.c94
1 files changed, 48 insertions, 46 deletions
diff --git a/drivers/edac/skx_edac.c b/drivers/edac/skx_edac.c
index 6d38701..93ef161 100644
--- a/drivers/edac/skx_edac.c
+++ b/drivers/edac/skx_edac.c
@@ -921,52 +921,6 @@ static bool skx_decode(struct decoded_addr *res)
skx_rir_decode(res) && skx_mad_decode(res);
}
-#ifdef CONFIG_EDAC_DEBUG
-/*
- * Debug feature.
- * Exercise the address decode logic by writing an address to
- * /sys/kernel/debug/edac/skx_test/addr.
- */
-static struct dentry *skx_test;
-
-static int debugfs_u64_set(void *data, u64 val)
-{
- struct decoded_addr res;
-
- res.addr = val;
- skx_decode(&res);
-
- return 0;
-}
-DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
-
-static void setup_skx_debug(void)
-{
- skx_test = edac_debugfs_create_dir("skx_test");
- if (!skx_test)
- return;
-
- if (!edac_debugfs_create_file("addr", 0200, skx_test,
- NULL, &fops_u64_wo)) {
- debugfs_remove(skx_test);
- skx_test = NULL;
- }
-}
-
-static void teardown_skx_debug(void)
-{
- debugfs_remove_recursive(skx_test);
-}
-#else
-static void setup_skx_debug(void)
-{
-}
-
-static void teardown_skx_debug(void)
-{
-}
-#endif /*CONFIG_EDAC_DEBUG*/
-
static bool skx_adxl_decode(struct decoded_addr *res)
{
@@ -1171,6 +1125,54 @@ static struct notifier_block skx_mce_dec = {
.priority = MCE_PRIO_EDAC,
};
+#ifdef CONFIG_EDAC_DEBUG
+/*
+ * Debug feature.
+ * Exercise the address decode logic by writing an address to
+ * /sys/kernel/debug/edac/skx_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");
+
+static void setup_skx_debug(void)
+{
+ skx_test = edac_debugfs_create_dir("skx_test");
+ if (!skx_test)
+ return;
+
+ if (!edac_debugfs_create_file("addr", 0200, skx_test,
+ NULL, &fops_u64_wo)) {
+ debugfs_remove(skx_test);
+ skx_test = NULL;
+ }
+}
+
+static void teardown_skx_debug(void)
+{
+ debugfs_remove_recursive(skx_test);
+}
+#else
+static void setup_skx_debug(void) {}
+static void teardown_skx_debug(void) {}
+#endif /*CONFIG_EDAC_DEBUG*/
+
static void skx_remove(void)
{
int i, j;

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