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path: root/drivers/edac/amd64_edac.c
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Diffstat (limited to 'drivers/edac/amd64_edac.c')
-rw-r--r--drivers/edac/amd64_edac.c76
1 files changed, 25 insertions, 51 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 173dc4a8416..bde3d027c2d 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2783,7 +2783,7 @@ static void check_mcg_ctl(void *ret)
}
/* check MCG_CTL on all the cpus on this node */
-static int amd64_mcg_ctl_enabled_on_cpus(const cpumask_t *mask)
+static int mcg_ctl_enabled_on_node(const struct cpumask *mask)
{
int ret = 1;
preempt_disable();
@@ -2799,71 +2799,45 @@ static int amd64_mcg_ctl_enabled_on_cpus(const cpumask_t *mask)
* the memory system completely. A command line option allows to force-enable
* hardware ECC later in amd64_enable_ecc_error_reporting().
*/
+static const char *ecc_warning =
+ "WARNING: ECC is disabled by BIOS. Module will NOT be loaded.\n"
+ " Either Enable ECC in the BIOS, or set 'ecc_enable_override'.\n"
+ " Also, use of the override can cause unknown side effects.\n";
+
static int amd64_check_ecc_enabled(struct amd64_pvt *pvt)
{
u32 value;
- int err = 0, ret = 0;
- u8 ecc_enabled = 0;
+ int err = 0;
+ u8 ecc_enabled = 0, mcg_ctl_en = 0;
err = pci_read_config_dword(pvt->misc_f3_ctl, K8_NBCFG, &value);
if (err)
debugf0("Reading K8_NBCTL failed\n");
ecc_enabled = !!(value & K8_NBCFG_ECC_ENABLE);
+ if (!ecc_enabled)
+ amd64_printk(KERN_WARNING, "This node reports that Memory ECC "
+ "is currently disabled, set F3x%x[22] (%s).\n",
+ K8_NBCFG, pci_name(pvt->misc_f3_ctl));
+ else
+ amd64_printk(KERN_INFO, "ECC is enabled by BIOS.\n");
- ret = amd64_mcg_ctl_enabled_on_cpus(cpumask_of_node(pvt->mc_node_id));
-
- debugf0("K8_NBCFG=0x%x, DRAM ECC is %s\n", value,
- (value & K8_NBCFG_ECC_ENABLE ? "enabled" : "disabled"));
-
- if (!ecc_enabled || !ret) {
- if (!ecc_enabled) {
- amd64_printk(KERN_WARNING, "This node reports that "
- "Memory ECC is currently "
- "disabled.\n");
+ mcg_ctl_en = mcg_ctl_enabled_on_node(cpumask_of_node(pvt->mc_node_id));
+ if (!mcg_ctl_en)
+ amd64_printk(KERN_WARNING, "NB MCE bank disabled, set MSR "
+ "0x%08x[4] on node %d to enable.\n",
+ MSR_IA32_MCG_CTL, pvt->mc_node_id);
- amd64_printk(KERN_WARNING, "bit 0x%lx in register "
- "F3x%x of the MISC_CONTROL device (%s) "
- "should be enabled\n", K8_NBCFG_ECC_ENABLE,
- K8_NBCFG, pci_name(pvt->misc_f3_ctl));
- }
- if (!ret) {
- amd64_printk(KERN_WARNING, "bit 0x%016lx in MSR 0x%08x "
- "of node %d should be enabled\n",
- K8_MSR_MCGCTL_NBE, MSR_IA32_MCG_CTL,
- pvt->mc_node_id);
- }
+ if (!ecc_enabled || !mcg_ctl_en) {
if (!ecc_enable_override) {
- amd64_printk(KERN_WARNING, "WARNING: ECC is NOT "
- "currently enabled by the BIOS. Module "
- "will NOT be loaded.\n"
- " Either Enable ECC in the BIOS, "
- "or use the 'ecc_enable_override' "
- "parameter.\n"
- " Might be a BIOS bug, if BIOS says "
- "ECC is enabled\n"
- " Use of the override can cause "
- "unknown side effects.\n");
- ret = -ENODEV;
- } else
- /*
- * enable further driver loading if ECC enable is
- * overridden.
- */
- ret = 0;
- } else {
- amd64_printk(KERN_INFO,
- "ECC is enabled by BIOS, Proceeding "
- "with EDAC module initialization\n");
-
- /* Signal good ECC status */
- ret = 0;
-
+ amd64_printk(KERN_WARNING, "%s", ecc_warning);
+ return -ENODEV;
+ }
+ } else
/* CLEAR the override, since BIOS controlled it */
ecc_enable_override = 0;
- }
- return ret;
+ return 0;
}
struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) +