EDAC, MCE: Add F15h DC MCE decoder

Add a decoder for F15h DC MCEs to support the new types of DC MCEs
introduced by the BD microarchitecture.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

2 files changed, 62 insertions, 19 deletions

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 01853eed2019..12bae3b18e3d 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -75,7 +75,7 @@ static const char *f10h_nb_mce_desc[] = {
         "ECC Error in the Probe Filter directory"
 };
 
-static bool f12h_dc_mce(u16 ec)
+static bool f12h_dc_mce(u16 ec, u8 xec)
 {
         bool ret = false;
 
@@ -93,7 +93,7 @@ static bool f12h_dc_mce(u16 ec)
         return ret;
 }
 
-static bool f10h_dc_mce(u16 ec)
+static bool f10h_dc_mce(u16 ec, u8 xec)
 {
         u8 r4  = (ec >> 4) & 0xf;
         u8 ll  = ec & 0x3;
@@ -102,20 +102,20 @@ static bool f10h_dc_mce(u16 ec)
                 pr_cont("during data scrub.\n");
                 return true;
         }
-        return f12h_dc_mce(ec);
+        return f12h_dc_mce(ec, xec);
 }
 
-static bool k8_dc_mce(u16 ec)
+static bool k8_dc_mce(u16 ec, u8 xec)
 {
         if (BUS_ERROR(ec)) {
                 pr_cont("during system linefill.\n");
                 return true;
         }
 
-        return f10h_dc_mce(ec);
+        return f10h_dc_mce(ec, xec);
 }
 
-static bool f14h_dc_mce(u16 ec)
+static bool f14h_dc_mce(u16 ec, u8 xec)
 {
         u8 r4    = (ec >> 4) & 0xf;
         u8 ll    = ec & 0x3;
@@ -170,6 +170,54 @@ static bool f14h_dc_mce(u16 ec)
         return ret;
 }
 
+static bool f15h_dc_mce(u16 ec, u8 xec)
+{
+        bool ret = true;
+
+        if (MEM_ERROR(ec)) {
+
+                switch (xec) {
+                case 0x0:
+                        pr_cont("Data Array access error.\n");
+                        break;
+
+                case 0x1:
+                        pr_cont("UC error during a linefill from L2/NB.\n");
+                        break;
+
+                case 0x2:
+                case 0x11:
+                        pr_cont("STQ access error.\n");
+                        break;
+
+                case 0x3:
+                        pr_cont("SCB access error.\n");
+                        break;
+
+                case 0x10:
+                        pr_cont("Tag error.\n");
+                        break;
+
+                case 0x12:
+                        pr_cont("LDQ access error.\n");
+                        break;
+
+                default:
+                        ret = false;
+                }
+        } else if (BUS_ERROR(ec)) {
+
+                if (!xec)
+                        pr_cont("during system linefill.\n");
+                else
+                        pr_cont(" Internal %s condition.\n",
+                                ((xec == 1) ? "livelock" : "deadlock"));
+        } else
+                ret = false;
+
+        return ret;
+}
+
 static void amd_decode_dc_mce(struct mce *m)
 {
         u16 ec = m->status & 0xffff;
@@ -183,20 +231,14 @@ static void amd_decode_dc_mce(struct mce *m)
 
                 if (tt == TT_DATA) {
                         pr_cont("%s TLB %s.\n", LL_MSG(ec),
-                                (xec ? "multimatch" : "parity error"));
+                                ((xec == 2) ? "locked miss"
+                                            : (xec ? "multimatch" : "parity")));
                         return;
                 }
-                else
-                        goto wrong_dc_mce;
-        }
-
-        if (!fam_ops->dc_mce(ec))
-                goto wrong_dc_mce;
-
-        return;
-
-wrong_dc_mce:
-        pr_emerg(HW_ERR "Corrupted DC MCE info?\n");
+        } else if (fam_ops->dc_mce(ec, xec))
+                ;
+        else
+                pr_emerg(HW_ERR "Corrupted DC MCE info?\n");
 }
 
 static bool k8_ic_mce(u16 ec)
@@ -654,6 +696,7 @@ static int __init mce_amd_init(void)
 
         case 0x15:
                 xec_mask = 0x1f;
+                fam_ops->dc_mce = f15h_dc_mce;
                 break;
 
         default:
diff --git a/drivers/edac/mce_amd.h b/drivers/edac/mce_amd.h
index 35f6e0e3b297..c12394db9bdf 100644
--- a/drivers/edac/mce_amd.h
+++ b/drivers/edac/mce_amd.h
@@ -100,7 +100,7 @@ struct err_regs {
  * per-family decoder ops
  */
 struct amd_decoder_ops {
-        bool (*dc_mce)(u16);
+        bool (*dc_mce)(u16, u8);
         bool (*ic_mce)(u16);
         bool (*nb_mce)(u16, u8);
 };