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EDAC, mce_amd_inj: Read out number of MCE banks from the hardware

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The number of banks for a given processor is encoded in
MSR_IA32_MCG_CAP[7:0]. So obtain the value from that MSR and use it for
sanity checking in inj_bank_set() instead of doing a family/model check.

Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: mchehab@osg.samsung.com
Link: http://lkml.kernel.org/r/1432753418-2985-3-git-send-email-Aravind.Gopalakrishnan@amd.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Aravind Gopalakrishnan 2015-05-27 14:03:34 -05:00 committed by Borislav Petkov
parent e7f2ea1dbe
commit 685d46d72b
1 changed files with 9 additions and 5 deletions
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14
drivers/edac/mce_amd_inj.c
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@ -25,6 +25,8 @@
static struct mce i_mce;
static struct dentry *dfs_inj;
static u8 n_banks;
#define MCE_INJECT_SET(reg) \
static int inj_##reg##_set(void *data, u64 val) \
{ \
@ -174,11 +176,9 @@ static int inj_bank_set(void *data, u64 val)
{
struct mce *m = (struct mce *)data;
if (val > 5) {
if (boot_cpu_data.x86 != 0x15 || val > 6) {
pr_err("Non-existent MCE bank: %llu\n", val);
return -EINVAL;
}
if (val >= n_banks) {
pr_err("Non-existent MCE bank: %llu\n", val);
return -EINVAL;
}
m->bank = val;
@ -207,6 +207,10 @@ static struct dfs_node {
static int __init init_mce_inject(void)
{
int i;
u64 cap;
rdmsrl(MSR_IA32_MCG_CAP, cap);
n_banks = cap & MCG_BANKCNT_MASK;
dfs_inj = debugfs_create_dir("mce-inject", NULL);
if (!dfs_inj)