EDAC, amd64: Extend ecc_enabled() to Fam17h
Update the ecc_enabled() function to work on Fam17h. This entails
reading a different set of registers and using the SMN (System
Management Network) rather than PCI devices.
Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1479423463-8536-9-git-send-email-Yazen.Ghannam@amd.com
[ Fixup ecc_en assignment and get_umc_base(). ]
Signed-off-by: Borislav Petkov <bp@suse.de>
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index ca1d63a..870f567 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2664,21 +2664,51 @@ static const char *ecc_msg =
static bool ecc_enabled(struct pci_dev *F3, u16 nid)
{
- u32 value;
- u8 ecc_en = 0;
bool nb_mce_en = false;
+ u8 ecc_en = 0, i;
+ u32 value;
- amd64_read_pci_cfg(F3, NBCFG, &value);
+ if (boot_cpu_data.x86 >= 0x17) {
+ u8 umc_en_mask = 0, ecc_en_mask = 0;
- ecc_en = !!(value & NBCFG_ECC_ENABLE);
+ for (i = 0; i < NUM_UMCS; i++) {
+ u32 base = get_umc_base(i);
+
+ /* Only check enabled UMCs. */
+ if (amd_smn_read(nid, base + UMCCH_SDP_CTRL, &value))
+ continue;
+
+ if (!(value & UMC_SDP_INIT))
+ continue;
+
+ umc_en_mask |= BIT(i);
+
+ if (amd_smn_read(nid, base + UMCCH_UMC_CAP_HI, &value))
+ continue;
+
+ if (value & UMC_ECC_ENABLED)
+ ecc_en_mask |= BIT(i);
+ }
+
+ /* Check whether at least one UMC is enabled: */
+ if (umc_en_mask)
+ ecc_en = umc_en_mask == ecc_en_mask;
+
+ /* Assume UMC MCA banks are enabled. */
+ nb_mce_en = true;
+ } else {
+ amd64_read_pci_cfg(F3, NBCFG, &value);
+
+ ecc_en = !!(value & NBCFG_ECC_ENABLE);
+
+ nb_mce_en = nb_mce_bank_enabled_on_node(nid);
+ if (!nb_mce_en)
+ amd64_notice("NB MCE bank disabled, set MSR 0x%08x[4] on node %d to enable.\n",
+ MSR_IA32_MCG_CTL, nid);
+ }
+
amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
- nb_mce_en = nb_mce_bank_enabled_on_node(nid);
- if (!nb_mce_en)
- amd64_notice("NB MCE bank disabled, set MSR "
- "0x%08x[4] on node %d to enable.\n",
- MSR_IA32_MCG_CTL, nid);
-
if (!ecc_en || !nb_mce_en) {
amd64_notice("%s", ecc_msg);
return false;