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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  amd64_edac: check NB MCE bank enable on the current node properly
  amd64_edac: Rewrite unganged mode code of f10_early_channel_count
  amd64_edac: cleanup amd64_check_ecc_enabled
  x86, EDAC: Provide function to return NodeId of a CPU
  amd64_edac: build driver only on AMD hardware
This commit is contained in:
Linus Torvalds 2009-09-17 09:55:52 -07:00
commit de55a8958f
5 changed files with 88 additions and 103 deletions
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2
arch/x86/include/asm/processor.h
View File

@ -1020,4 +1020,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
extern int get_tsc_mode(unsigned long adr);
extern int set_tsc_mode(unsigned int val);
extern int amd_get_nb_id(int cpu);
#endif /* _ASM_X86_PROCESSOR_H */

10
arch/x86/kernel/cpu/amd.c
View File

@ -333,6 +333,16 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c)
#endif
}
int amd_get_nb_id(int cpu)
{
int id = 0;
#ifdef CONFIG_SMP
id = per_cpu(cpu_llc_id, cpu);
#endif
return id;
}
EXPORT_SYMBOL_GPL(amd_get_nb_id);
static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
{
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)

2
drivers/edac/Kconfig
View File

@ -59,7 +59,7 @@ config EDAC_MM_EDAC
config EDAC_AMD64
tristate "AMD64 (Opteron, Athlon64) K8, F10h, F11h"
depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI
depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI && CPU_SUP_AMD
help
Support for error detection and correction on the AMD 64
Families of Memory Controllers (K8, F10h and F11h)

175
drivers/edac/amd64_edac.c
View File

@ -1255,7 +1255,9 @@ static int k8_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map)
*/
static int f10_early_channel_count(struct amd64_pvt *pvt)
{
int dbams[] = { DBAM0, DBAM1 };
int err = 0, channels = 0;
int i, j;
u32 dbam;
err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0);
@ -1288,46 +1290,19 @@ static int f10_early_channel_count(struct amd64_pvt *pvt)
* is more than just one DIMM present in unganged mode. Need to check
* both controllers since DIMMs can be placed in either one.
*/
channels = 0;
err = pci_read_config_dword(pvt->dram_f2_ctl, DBAM0, &dbam);
if (err)
goto err_reg;
if (DBAM_DIMM(0, dbam) > 0)
channels++;
if (DBAM_DIMM(1, dbam) > 0)
channels++;
if (DBAM_DIMM(2, dbam) > 0)
channels++;
if (DBAM_DIMM(3, dbam) > 0)
channels++;
/* If more than 2 DIMMs are present, then we have 2 channels */
if (channels > 2)
channels = 2;
else if (channels == 0) {
/* No DIMMs on DCT0, so look at DCT1 */
err = pci_read_config_dword(pvt->dram_f2_ctl, DBAM1, &dbam);
for (i = 0; i < ARRAY_SIZE(dbams); i++) {
err = pci_read_config_dword(pvt->dram_f2_ctl, dbams[i], &dbam);
if (err)
goto err_reg;
if (DBAM_DIMM(0, dbam) > 0)
channels++;
if (DBAM_DIMM(1, dbam) > 0)
channels++;
if (DBAM_DIMM(2, dbam) > 0)
channels++;
if (DBAM_DIMM(3, dbam) > 0)
channels++;
if (channels > 2)
channels = 2;
for (j = 0; j < 4; j++) {
if (DBAM_DIMM(j, dbam) > 0) {
channels++;
break;
}
}
}
/* If we found ALL 0 values, then assume just ONE DIMM-ONE Channel */
if (channels == 0)
channels = 1;
debugf0("MCT channel count: %d\n", channels);
return channels;
@ -2766,30 +2741,53 @@ static void amd64_restore_ecc_error_reporting(struct amd64_pvt *pvt)
wrmsr_on_cpus(cpumask, K8_MSR_MCGCTL, msrs);
}
static void check_mcg_ctl(void *ret)
/* get all cores on this DCT */
static void get_cpus_on_this_dct_cpumask(cpumask_t *mask, int nid)
{
u64 msr_val = 0;
u8 nbe;
int cpu;
rdmsrl(MSR_IA32_MCG_CTL, msr_val);
nbe = msr_val & K8_MSR_MCGCTL_NBE;
debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
raw_smp_processor_id(), msr_val,
(nbe ? "enabled" : "disabled"));
if (!nbe)
*(int *)ret = 0;
for_each_online_cpu(cpu)
if (amd_get_nb_id(cpu) == nid)
cpumask_set_cpu(cpu, mask);
}
/* check MCG_CTL on all the cpus on this node */
static int amd64_mcg_ctl_enabled_on_cpus(const cpumask_t *mask)
static bool amd64_nb_mce_bank_enabled_on_node(int nid)
{
int ret = 1;
preempt_disable();
smp_call_function_many(mask, check_mcg_ctl, &ret, 1);
preempt_enable();
cpumask_t mask;
struct msr *msrs;
int cpu, nbe, idx = 0;
bool ret = false;
cpumask_clear(&mask);
get_cpus_on_this_dct_cpumask(&mask, nid);
msrs = kzalloc(sizeof(struct msr) * cpumask_weight(&mask), GFP_KERNEL);
if (!msrs) {
amd64_printk(KERN_WARNING, "%s: error allocating msrs\n",
__func__);
return false;
}
rdmsr_on_cpus(&mask, MSR_IA32_MCG_CTL, msrs);
for_each_cpu(cpu, &mask) {
nbe = msrs[idx].l & K8_MSR_MCGCTL_NBE;
debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
cpu, msrs[idx].q,
(nbe ? "enabled" : "disabled"));
if (!nbe)
goto out;
idx++;
}
ret = true;
out:
kfree(msrs);
return ret;
}
@ -2799,71 +2797,46 @@ 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;
int err = 0;
u8 ecc_enabled = 0;
bool nb_mce_en = false;
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));
nb_mce_en = amd64_nb_mce_bank_enabled_on_node(pvt->mc_node_id);
if (!nb_mce_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);
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");
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 || !nb_mce_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) +

2
drivers/edac/edac_mce_amd.c
View File

@ -405,7 +405,7 @@ void decode_mce(struct mce *m)
regs.nbsh = (u32)(m->status >> 32);
regs.nbeal = (u32) m->addr;
regs.nbeah = (u32)(m->addr >> 32);
node = per_cpu(cpu_llc_id, m->extcpu);
node = amd_get_nb_id(m->extcpu);
amd_decode_nb_mce(node, &regs, 1);
break;