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Date: Tue, 7 Feb 2012 15:26:05 +0100
From: Borislav Petkov <bp@...64.org>
To: EDAC devel <linux-edac@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH 4/6] MCE, AMD: Rework NB MCE signatures
From: Borislav Petkov <borislav.petkov@....com>
Correct their formulation, replace per-family functions with a single,
unified lookup table.
Signed-off-by: Borislav Petkov <borislav.petkov@....com>
Reviewed-by: Andreas Herrmann <andreas.herrmann3@....com>
---
drivers/edac/mce_amd.c | 176 +++++++++++++-----------------------------------
drivers/edac/mce_amd.h | 1 -
2 files changed, 48 insertions(+), 129 deletions(-)
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index bf6dd99..f6ebe5e 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -64,17 +64,6 @@ EXPORT_SYMBOL_GPL(to_msgs);
const char *ii_msgs[] = { "MEM", "RESV", "IO", "GEN" };
EXPORT_SYMBOL_GPL(ii_msgs);
-static const char *f10h_nb_mce_desc[] = {
- "HT link data error",
- "Protocol error (link, L3, probe filter, etc.)",
- "Parity error in NB-internal arrays",
- "Link Retry due to IO link transmission error",
- "L3 ECC data cache error",
- "ECC error in L3 cache tag",
- "L3 LRU parity bits error",
- "ECC Error in the Probe Filter directory"
-};
-
static const char * const f15h_ic_mce_desc[] = {
"UC during a demand linefill from L2",
"Parity error during data load from IC",
@@ -112,6 +101,28 @@ static const char * const f15h_cu_mce_desc[] = {
"PRB address parity error"
};
+static const char *nb_mce_desc[] = {
+ "DRAM ECC error detected on the NB",
+ "CRC error detected on HT link",
+ "Link-defined sync error packets detected on HT link",
+ "HT Master abort",
+ "HT Target abort",
+ "Invalid GART PTE entry during GART table walk",
+ "Unsupported atomic RMW received from an IO link",
+ "Watchdog timeout due to lack of progress",
+ "DRAM ECC error detected on the NB",
+ "SVM DMA Exclusion Vector error",
+ "HT data error detected on link",
+ "Protocol error (link, L3, probe filter)",
+ "NB internal arrays parity error",
+ "DRAM addr/ctl signals parity error",
+ "IO link transmission error",
+ "L3 data cache ECC error", /* xec = 0x1c */
+ "L3 cache tag error",
+ "L3 LRU parity bits error",
+ "ECC Error in the Probe Filter directory"
+};
+
static const char * const fr_ex_mce_desc[] = {
"CPU Watchdog timer expire",
"Wakeup array dest tag",
@@ -499,58 +510,31 @@ wrong_ls_mce:
pr_emerg(HW_ERR "Corrupted LS MCE info?\n");
}
-static bool k8_nb_mce(u16 ec, u8 xec)
+void amd_decode_nb_mce(struct mce *m)
{
- bool ret = true;
-
- switch (xec) {
- case 0x1:
- pr_cont("CRC error detected on HT link.\n");
- break;
-
- case 0x5:
- pr_cont("Invalid GART PTE entry during GART table walk.\n");
- break;
-
- case 0x6:
- pr_cont("Unsupported atomic RMW received from an IO link.\n");
- break;
-
- case 0x0:
- case 0x8:
- if (boot_cpu_data.x86 == 0x11)
- return false;
-
- pr_cont("DRAM ECC error detected on the NB.\n");
- break;
-
- case 0xd:
- pr_cont("Parity error on the DRAM addr/ctl signals.\n");
- break;
-
- default:
- ret = false;
- break;
- }
+ struct cpuinfo_x86 *c = &boot_cpu_data;
+ int node_id = amd_get_nb_id(m->extcpu);
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, 0x1f);
+ u8 offset = 0;
- return ret;
-}
+ pr_emerg(HW_ERR "Northbridge Error (node %d): ", node_id);
-static bool f10h_nb_mce(u16 ec, u8 xec)
-{
- bool ret = true;
- u8 offset = 0;
+ switch (xec) {
+ case 0x0 ... 0xe:
- if (k8_nb_mce(ec, xec))
- return true;
+ /* special handling for DRAM ECCs */
+ if (xec == 0x0 || xec == 0x8) {
+ /* no ECCs on F11h */
+ if (c->x86 == 0x11)
+ goto wrong_nb_mce;
- switch(xec) {
- case 0xa ... 0xc:
- offset = 10;
- break;
+ pr_cont("%s.\n", nb_mce_desc[xec]);
- case 0xe:
- offset = 11;
+ if (nb_bus_decoder)
+ nb_bus_decoder(node_id, m);
+ return;
+ }
break;
case 0xf:
@@ -559,83 +543,25 @@ static bool f10h_nb_mce(u16 ec, u8 xec)
else if (BUS_ERROR(ec))
pr_cont("DMA Exclusion Vector Table Walk error.\n");
else
- ret = false;
-
- goto out;
- break;
+ goto wrong_nb_mce;
+ return;
case 0x19:
if (boot_cpu_data.x86 == 0x15)
pr_cont("Compute Unit Data Error.\n");
else
- ret = false;
-
- goto out;
- break;
+ goto wrong_nb_mce;
+ return;
case 0x1c ... 0x1f:
- offset = 24;
+ offset = 13;
break;
default:
- ret = false;
-
- goto out;
- break;
- }
-
- pr_cont("%s.\n", f10h_nb_mce_desc[xec - offset]);
-
-out:
- return ret;
-}
-
-static bool nb_noop_mce(u16 ec, u8 xec)
-{
- return false;
-}
-
-void amd_decode_nb_mce(struct mce *m)
-{
- struct cpuinfo_x86 *c = &boot_cpu_data;
- int node_id = amd_get_nb_id(m->extcpu);
- u16 ec = EC(m->status);
- u8 xec = XEC(m->status, 0x1f);
-
- pr_emerg(HW_ERR "Northbridge Error (node %d): ", node_id);
-
- switch (xec) {
- case 0x2:
- pr_cont("Sync error (sync packets on HT link detected).\n");
- return;
-
- case 0x3:
- pr_cont("HT Master abort.\n");
- return;
-
- case 0x4:
- pr_cont("HT Target abort.\n");
- return;
-
- case 0x7:
- pr_cont("NB Watchdog timeout.\n");
- return;
-
- case 0x9:
- pr_cont("SVM DMA Exclusion Vector error.\n");
- return;
-
- default:
- break;
- }
-
- if (!fam_ops->nb_mce(ec, xec))
goto wrong_nb_mce;
+ }
- if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x15)
- if ((xec == 0x8 || xec == 0x0) && nb_bus_decoder)
- nb_bus_decoder(node_id, m);
-
+ pr_cont("%s.\n", nb_mce_desc[xec - offset]);
return;
wrong_nb_mce:
@@ -844,39 +770,33 @@ static int __init mce_amd_init(void)
case 0xf:
fam_ops->dc_mce = k8_dc_mce;
fam_ops->ic_mce = k8_ic_mce;
- fam_ops->nb_mce = k8_nb_mce;
break;
case 0x10:
fam_ops->dc_mce = f10h_dc_mce;
fam_ops->ic_mce = k8_ic_mce;
- fam_ops->nb_mce = f10h_nb_mce;
break;
case 0x11:
fam_ops->dc_mce = k8_dc_mce;
fam_ops->ic_mce = k8_ic_mce;
- fam_ops->nb_mce = f10h_nb_mce;
break;
case 0x12:
fam_ops->dc_mce = f12h_dc_mce;
fam_ops->ic_mce = k8_ic_mce;
- fam_ops->nb_mce = nb_noop_mce;
break;
case 0x14:
nb_err_cpumask = 0x3;
fam_ops->dc_mce = f14h_dc_mce;
fam_ops->ic_mce = f14h_ic_mce;
- fam_ops->nb_mce = nb_noop_mce;
break;
case 0x15:
xec_mask = 0x1f;
fam_ops->dc_mce = f15h_dc_mce;
fam_ops->ic_mce = f15h_ic_mce;
- fam_ops->nb_mce = f10h_nb_mce;
break;
default:
diff --git a/drivers/edac/mce_amd.h b/drivers/edac/mce_amd.h
index 0106747..6fcf599 100644
--- a/drivers/edac/mce_amd.h
+++ b/drivers/edac/mce_amd.h
@@ -82,7 +82,6 @@ extern const char *ii_msgs[];
struct amd_decoder_ops {
bool (*dc_mce)(u16, u8);
bool (*ic_mce)(u16, u8);
- bool (*nb_mce)(u16, u8);
};
void amd_report_gart_errors(bool);
--
1.7.8.rc0
--
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