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| author | Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> | 2015-05-27 14:03:34 -0500 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2015-06-03 16:18:22 +0200 |
| commit | 685d46d72ba456569d739cc3ff43577f4001d52f (patch) | |
| tree | e42e289d0baa778239c2f01536261633bd2a5848 /drivers/edac | |
| parent | e7f2ea1dbec30d607f0017706aa25b77477dd69c (diff) | |
| download | op-kernel-dev-685d46d72ba456569d739cc3ff43577f4001d52f.zip op-kernel-dev-685d46d72ba456569d739cc3ff43577f4001d52f.tar.gz | |
EDAC, mce_amd_inj: Read out number of MCE banks from the hardware
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>
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/mce_amd_inj.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/edac/mce_amd_inj.c b/drivers/edac/mce_amd_inj.c index 7f3a97a..15f6aa1 100644 --- a/drivers/edac/mce_amd_inj.c +++ b/drivers/edac/mce_amd_inj.c @@ -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) |
