EDAC, AMD: carve out decoding of MCi_STATUS ErrorCode

This is the MCE error code from the MCi_STATUS banks, bits [15:0] which
describe what type of error was encountered: GART TLB, Memory or Bus
error. The semantics of those bits are identical across all MCE banks so
decode those separately, irrespectively of MCE type.

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

2 files changed, 22 insertions, 19 deletions

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index c81ca2cf8dc..173dc4a8416 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2289,10 +2289,6 @@ static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci,
         u32 xec = EXT_ERROR_CODE(info->nbsl);
         int ecc_type = info->nbsh & (0x3 << 13);
 
-        pr_emerg(" Transaction type: %s(%s), %s, Cache Level: %s, %s\n",
-                 RRRR_MSG(ec), II_MSG(ec), TO_MSG(ec), LL_MSG(ec), PP_MSG(ec));
-
-
         /* Bail early out if this was an 'observed' error */
         if (PP(ec) == K8_NBSL_PP_OBS)
                 return;
diff --git a/drivers/edac/edac_mce_amd.c b/drivers/edac/edac_mce_amd.c
index 0ba92d65db4..81f812eb3ae 100644
--- a/drivers/edac/edac_mce_amd.c
+++ b/drivers/edac/edac_mce_amd.c
@@ -150,6 +150,16 @@ void amd_decode_nb_mce(int node_id, struct err_regs *regs, int handle_errors)
                 pr_cont(", core: %d\n", ilog2((regs->nbsh & 0xf)));
         }
 
+
+        pr_emerg("%s.\n", EXT_ERR_MSG(xec));
+
+        if (BUS_ERROR(ec) && nb_bus_decoder)
+                nb_bus_decoder(node_id, regs);
+}
+EXPORT_SYMBOL_GPL(amd_decode_nb_mce);
+
+static inline void amd_decode_err_code(unsigned int ec)
+{
         if (TLB_ERROR(ec)) {
                 /*
                  * GART errors are intended to help graphics driver developers
@@ -166,33 +176,28 @@ void amd_decode_nb_mce(int node_id, struct err_regs *regs, int handle_errors)
                 if (!report_gart_errors)
                         return;
 
-                pr_emerg(" GART TLB error, Transaction: %s, Cache Level %s\n",
+                pr_emerg(" Transaction: %s, Cache Level %s\n",
                          TT_MSG(ec), LL_MSG(ec));
         } else if (MEM_ERROR(ec)) {
-                pr_emerg(" Memory/Cache error, Transaction: %s, Type: %s,"
-                         " Cache Level: %s",
+                pr_emerg(" Transaction: %s, Type: %s, Cache Level: %s",
                          RRRR_MSG(ec), TT_MSG(ec), LL_MSG(ec));
         } else if (BUS_ERROR(ec)) {
-                pr_emerg(" Bus (Link/DRAM) error\n");
-                if (nb_bus_decoder)
-                        nb_bus_decoder(node_id, regs);
-        } else {
-                /* shouldn't reach here! */
-                pr_warning("%s: unknown MCE error 0x%x\n", __func__, ec);
-        }
-
-        pr_emerg("%s.\n", EXT_ERR_MSG(xec));
+                pr_emerg(" Transaction type: %s(%s), %s, Cache Level: %s, "
+                         "Participating Processor: %s\n",
+                          RRRR_MSG(ec), II_MSG(ec), TO_MSG(ec), LL_MSG(ec),
+                          PP_MSG(ec));
+        } else
+                pr_warning("Huh? Unknown MCE error 0x%x\n", ec);
 }
-EXPORT_SYMBOL_GPL(amd_decode_nb_mce);
 
 void decode_mce(struct mce *m)
 {
         struct err_regs regs;
         int node, ecc;
 
-        pr_emerg("MC%d_STATUS:\n", m->bank);
+        pr_emerg("MC%d_STATUS: ", m->bank);
 
-        pr_emerg(" Error: %sorrected, Report: %s, MiscV: %svalid, "
+        pr_cont("%sorrected error, report: %s, MiscV: %svalid, "
                  "CPU context corrupt: %s",
                  ((m->status & MCI_STATUS_UC) ? "Unc"  : "C"),
                  ((m->status & MCI_STATUS_EN) ? "yes"  : "no"),
@@ -206,6 +211,8 @@ void decode_mce(struct mce *m)
 
         pr_cont("\n");
 
+        amd_decode_err_code(m->status & 0xffff);
+
         if (m->bank == 4) {
                 regs.nbsl  = (u32) m->status;
                 regs.nbsh  = (u32)(m->status >> 32);