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Date: Fri, 11 Jun 2021 10:01:18 -0700
From: Tony Luck <tony.luck@...el.com>
To: tony.luck@...el.com
Cc: Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
Aristeu Rozanski <aris@...hat.com>,
Borislav Petkov <bp@...en8.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] EDAC/skx_common: Add new ADXL components for 2-level memory
From: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
Some Intel servers may configure memory in 2 levels, using
fast "near" memory (e.g. DDR) as a cache for larger, slower,
"far" memory (e.g. 3D X-point).
In these configurations the BIOS ADXL address translation for
an address in a 2-level memory range will provide details of
both the "near" and far components.
Current exported ADXL components are only for 1-level memory
system or for 2nd level memory of 2-level memory system. So
add new ADXL components for 1st level memory of 2-level memory
system to fully support 2-level memory system and the detection
of memory error source(1st level memory or 2nd level memory).
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
drivers/edac/skx_common.c | 67 ++++++++++++++++++++++++++++++++-------
drivers/edac/skx_common.h | 11 +++++++
2 files changed, 67 insertions(+), 11 deletions(-)
diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c
index 81c3e2ec6f56..c8691abb720d 100644
--- a/drivers/edac/skx_common.c
+++ b/drivers/edac/skx_common.c
@@ -23,10 +23,13 @@
#include "skx_common.h"
static const char * const component_names[] = {
- [INDEX_SOCKET] = "ProcessorSocketId",
- [INDEX_MEMCTRL] = "MemoryControllerId",
- [INDEX_CHANNEL] = "ChannelId",
- [INDEX_DIMM] = "DimmSlotId",
+ [INDEX_SOCKET] = "ProcessorSocketId",
+ [INDEX_MEMCTRL] = "MemoryControllerId",
+ [INDEX_CHANNEL] = "ChannelId",
+ [INDEX_DIMM] = "DimmSlotId",
+ [INDEX_NM_MEMCTRL] = "NmMemoryControllerId",
+ [INDEX_NM_CHANNEL] = "NmChannelId",
+ [INDEX_NM_DIMM] = "NmDimmSlotId",
};
static int component_indices[ARRAY_SIZE(component_names)];
@@ -34,12 +37,14 @@ static int adxl_component_count;
static const char * const *adxl_component_names;
static u64 *adxl_values;
static char *adxl_msg;
+static unsigned long adxl_nm_bitmap;
static char skx_msg[MSG_SIZE];
static skx_decode_f skx_decode;
static skx_show_retry_log_f skx_show_retry_rd_err_log;
static u64 skx_tolm, skx_tohm;
static LIST_HEAD(dev_edac_list);
+static bool skx_mem_cfg_2lm;
int __init skx_adxl_get(void)
{
@@ -56,14 +61,25 @@ int __init skx_adxl_get(void)
for (j = 0; names[j]; j++) {
if (!strcmp(component_names[i], names[j])) {
component_indices[i] = j;
+
+ if (i >= INDEX_NM_FIRST)
+ adxl_nm_bitmap |= 1 << i;
+
break;
}
}
- if (!names[j])
+ if (!names[j] && i < INDEX_NM_FIRST)
goto err;
}
+ if (skx_mem_cfg_2lm) {
+ if (!adxl_nm_bitmap)
+ skx_printk(KERN_NOTICE, "Not enough ADXL components for 2-level memory.\n");
+ else
+ edac_dbg(2, "adxl_nm_bitmap: 0x%lx\n", adxl_nm_bitmap);
+ }
+
adxl_component_names = names;
while (*names++)
adxl_component_count++;
@@ -99,7 +115,7 @@ void __exit skx_adxl_put(void)
kfree(adxl_msg);
}
-static bool skx_adxl_decode(struct decoded_addr *res)
+static bool skx_adxl_decode(struct decoded_addr *res, bool error_in_1st_level_mem)
{
struct skx_dev *d;
int i, len = 0;
@@ -116,11 +132,20 @@ static bool skx_adxl_decode(struct decoded_addr *res)
}
res->socket = (int)adxl_values[component_indices[INDEX_SOCKET]];
- res->imc = (int)adxl_values[component_indices[INDEX_MEMCTRL]];
- res->channel = (int)adxl_values[component_indices[INDEX_CHANNEL]];
- res->dimm = (int)adxl_values[component_indices[INDEX_DIMM]];
+ if (error_in_1st_level_mem) {
+ res->imc = (adxl_nm_bitmap & BIT_NM_MEMCTRL) ?
+ (int)adxl_values[component_indices[INDEX_NM_MEMCTRL]] : -1;
+ res->channel = (adxl_nm_bitmap & BIT_NM_CHANNEL) ?
+ (int)adxl_values[component_indices[INDEX_NM_CHANNEL]] : -1;
+ res->dimm = (adxl_nm_bitmap & BIT_NM_DIMM) ?
+ (int)adxl_values[component_indices[INDEX_NM_DIMM]] : -1;
+ } else {
+ res->imc = (int)adxl_values[component_indices[INDEX_MEMCTRL]];
+ res->channel = (int)adxl_values[component_indices[INDEX_CHANNEL]];
+ res->dimm = (int)adxl_values[component_indices[INDEX_DIMM]];
+ }
- if (res->imc > NUM_IMC - 1) {
+ if (res->imc > NUM_IMC - 1 || res->imc < 0) {
skx_printk(KERN_ERR, "Bad imc %d\n", res->imc);
return false;
}
@@ -151,6 +176,11 @@ static bool skx_adxl_decode(struct decoded_addr *res)
return true;
}
+void skx_set_mem_cfg(bool mem_cfg_2lm)
+{
+ skx_mem_cfg_2lm = mem_cfg_2lm;
+}
+
void skx_set_decode(skx_decode_f decode, skx_show_retry_log_f show_retry_log)
{
skx_decode = decode;
@@ -578,6 +608,21 @@ static void skx_mce_output_error(struct mem_ctl_info *mci,
optype, skx_msg);
}
+static bool skx_error_in_1st_level_mem(const struct mce *m)
+{
+ u32 errcode;
+
+ if (!skx_mem_cfg_2lm)
+ return false;
+
+ errcode = GET_BITFIELD(m->status, 0, 15);
+
+ if ((errcode & 0xef80) != 0x280)
+ return false;
+
+ return true;
+}
+
int skx_mce_check_error(struct notifier_block *nb, unsigned long val,
void *data)
{
@@ -597,7 +642,7 @@ int skx_mce_check_error(struct notifier_block *nb, unsigned long val,
res.addr = mce->addr;
if (adxl_component_count) {
- if (!skx_adxl_decode(&res))
+ if (!skx_adxl_decode(&res, skx_error_in_1st_level_mem(mce)))
return NOTIFY_DONE;
} else if (!skx_decode || !skx_decode(&res)) {
return NOTIFY_DONE;
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index bf56bebff138..8b5a49058ce4 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -9,6 +9,8 @@
#ifndef _SKX_COMM_EDAC_H
#define _SKX_COMM_EDAC_H
+#include <linux/bits.h>
+
#define MSG_SIZE 1024
/*
@@ -92,9 +94,17 @@ enum {
INDEX_MEMCTRL,
INDEX_CHANNEL,
INDEX_DIMM,
+ INDEX_NM_FIRST,
+ INDEX_NM_MEMCTRL = INDEX_NM_FIRST,
+ INDEX_NM_CHANNEL,
+ INDEX_NM_DIMM,
INDEX_MAX
};
+#define BIT_NM_MEMCTRL BIT_ULL(INDEX_NM_MEMCTRL)
+#define BIT_NM_CHANNEL BIT_ULL(INDEX_NM_CHANNEL)
+#define BIT_NM_DIMM BIT_ULL(INDEX_NM_DIMM)
+
struct decoded_addr {
struct skx_dev *dev;
u64 addr;
@@ -133,6 +143,7 @@ typedef void (*skx_show_retry_log_f)(struct decoded_addr *res, char *msg, int le
int __init skx_adxl_get(void);
void __exit skx_adxl_put(void);
void skx_set_decode(skx_decode_f decode, skx_show_retry_log_f show_retry_log);
+void skx_set_mem_cfg(bool mem_cfg_2lm);
int skx_get_src_id(struct skx_dev *d, int off, u8 *id);
int skx_get_node_id(struct skx_dev *d, u8 *id);
--
2.29.2
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