[PATCH 12/14] amd64_edac: decode bus unit MCEs

Borislav Petkov
2009-07-20T16:13:53Z

according to Table 69, Fam10h BKDG (31116, rev. 3.28).

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
---
drivers/edac/amd64_edac.c | 46 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 2a810c1..603599e 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2343,6 +2343,48 @@ wrong_ic_mce:
pr_warning("Corrupted IC MCE info?\n");
}

+static void amd64_decode_bu_mce(u64 mc2_status)
+{
+ u32 ec = mc2_status & 0xffff;
+ u32 xec = (mc2_status >> 16) & 0xf;
+
+ pr_emerg(" Bus Unit Error");
+
+ if (xec == 0x1)
+ pr_cont(" in the write data buffers.\n");
+ else if (xec == 0x3)
+ pr_cont(" in the victim data buffers.\n");
+ else if (xec == 0x2 && MEM_ERROR(ec))
+ pr_cont(": %s error in the L2 cache tags.\n", RRRR(ec));
+ else if (xec == 0x0) {
+ if (TLB_ERROR(ec))
+ pr_cont(": %s error in a Page Descriptor Cache or "
+ "Guest TLB.\n", TT(ec));
+ else if (BUS_ERROR(ec))
+ pr_cont(": %s/ECC error in data read from NB: %s.\n",
+ RRRR(ec), PP(ec));
+ else if (MEM_ERROR(ec)) {
+ u8 rrrr = (ec >> 4) & 0xf;
+
+ if (rrrr >= 0x7)
+ pr_cont(": %s error during data copyback.\n",
+ RRRR(ec));
+ else if (rrrr <= 0x1)
+ pr_cont(": %s parity/ECC error during data "
+ "access from L2.\n", RRRR(ec));
+ else
+ goto wrong_bu_mce;
+ } else
+ goto wrong_bu_mce;
+ } else
+ goto wrong_bu_mce;
+
+ return;
+
+wrong_bu_mce:
+ pr_warning("Corrupted BU MCE info?\n");
+}
+
void amd64_decode_nb_mce(struct mem_ctl_info *mci, struct err_regs *regs,
int handle_errors, int ecc)
{
@@ -2444,6 +2486,10 @@ void decode_mce(struct mce *m)
amd64_decode_ic_mce(m->status);
break;

+ case 2:
+ amd64_decode_bu_mce(m->status);
+ break;
+
case 4:
regs.nbsl = (u32) m->status;
regs.nbsh = (u32)(m->status >> 32);
--
1.6.3.3