linux-kernel - [PATCH 1/2] MCE, AMD: Make MC2 decoding part of amd_decoder

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Message-ID: <1355864771-13839-2-git-send-email-jacob.shin@amd.com>
Date:	Tue, 18 Dec 2012 15:06:10 -0600
From:	Jacob Shin <jacob.shin@....com>
To:	Borislav Petkov <bp@...en8.de>,
	Doug Thompson <dougthompson@...ssion.com>
CC:	<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Jacob Shin <jacob.shin@....com>
Subject: [PATCH 1/2] MCE, AMD: Make MC2 decoding part of amd_decoder_ops as well

Currently only AMD Family 15h processors have special handling for MC2
errors, since upcoming Family 16h will also need unique handling,
let's make MC2 handling part of amd_decoder_ops.

Signed-off-by: Jacob Shin <jacob.shin@....com>
---
 drivers/edac/mce_amd.c |   56 +++++++++++++++++++++++++-----------------------
 drivers/edac/mce_amd.h |    1 +
 2 files changed, 30 insertions(+), 27 deletions(-)

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index ad63757..e4752be 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -399,12 +399,9 @@ static void decode_mc1_mce(struct mce *m)
 		pr_emerg(HW_ERR "Corrupted MC1 MCE info?\n");
 }
 
-static void decode_mc2_mce(struct mce *m)
+static bool k8_mc2_mce(u16 ec, u8 xec)
 {
-	u16 ec = EC(m->status);
-	u8 xec = XEC(m->status, xec_mask);
-
-	pr_emerg(HW_ERR "MC2 Error");
+	bool ret = true;
 
 	if (xec == 0x1)
 		pr_cont(" in the write data buffers.\n");
@@ -429,24 +426,18 @@ static void decode_mc2_mce(struct mce *m)
 				pr_cont(": %s parity/ECC error during data "
 					"access from L2.\n", R4_MSG(ec));
 			else
-				goto wrong_mc2_mce;
+				ret = false;
 		} else
-			goto wrong_mc2_mce;
+			ret = false;
 	} else
-		goto wrong_mc2_mce;
-
-	return;
+		ret = false;
 
- wrong_mc2_mce:
-	pr_emerg(HW_ERR "Corrupted MC2 MCE info?\n");
+	return ret;
 }
 
-static void decode_f15_mc2_mce(struct mce *m)
+static bool f15h_mc2_mce(u16 ec, u8 xec)
 {
-	u16 ec = EC(m->status);
-	u8 xec = XEC(m->status, xec_mask);
-
-	pr_emerg(HW_ERR "MC2 Error: ");
+	bool ret = true;
 
 	if (TLB_ERROR(ec)) {
 		if (xec == 0x0)
@@ -454,10 +445,10 @@ static void decode_f15_mc2_mce(struct mce *m)
 		else if (xec == 0x1)
 			pr_cont("Poison data provided for TLB fill.\n");
 		else
-			goto wrong_f15_mc2_mce;
+			ret = false;
 	} else if (BUS_ERROR(ec)) {
 		if (xec > 2)
-			goto wrong_f15_mc2_mce;
+			ret = false;
 
 		pr_cont("Error during attempted NB data read.\n");
 	} else if (MEM_ERROR(ec)) {
@@ -471,14 +462,22 @@ static void decode_f15_mc2_mce(struct mce *m)
 			break;
 
 		default:
-			goto wrong_f15_mc2_mce;
+			ret = false;
 		}
 	}
 
-	return;
+	return ret;
+}
+
+static void decode_mc2_mce(struct mce *m)
+{
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, xec_mask);
 
- wrong_f15_mc2_mce:
-	pr_emerg(HW_ERR "Corrupted MC2 MCE info?\n");
+	pr_emerg(HW_ERR "MC2 Error: ");
+
+	if (!fam_ops->mc2_mce(ec, xec))
+		pr_cont(HW_ERR "Corrupted MC2 MCE info?\n");
 }
 
 static void decode_mc3_mce(struct mce *m)
@@ -702,10 +701,7 @@ int amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
 		break;
 
 	case 2:
-		if (c->x86 == 0x15)
-			decode_f15_mc2_mce(m);
-		else
-			decode_mc2_mce(m);
+		decode_mc2_mce(m);
 		break;
 
 	case 3:
@@ -783,33 +779,39 @@ static int __init mce_amd_init(void)
 	case 0xf:
 		fam_ops->mc0_mce = k8_mc0_mce;
 		fam_ops->mc1_mce = k8_mc1_mce;
+		fam_ops->mc2_mce = k8_mc2_mce;
 		break;
 
 	case 0x10:
 		fam_ops->mc0_mce = f10h_mc0_mce;
 		fam_ops->mc1_mce = k8_mc1_mce;
+		fam_ops->mc2_mce = k8_mc2_mce;
 		break;
 
 	case 0x11:
 		fam_ops->mc0_mce = k8_mc0_mce;
 		fam_ops->mc1_mce = k8_mc1_mce;
+		fam_ops->mc2_mce = k8_mc2_mce;
 		break;
 
 	case 0x12:
 		fam_ops->mc0_mce = f12h_mc0_mce;
 		fam_ops->mc1_mce = k8_mc1_mce;
+		fam_ops->mc2_mce = k8_mc2_mce;
 		break;
 
 	case 0x14:
 		nb_err_cpumask  = 0x3;
 		fam_ops->mc0_mce = f14h_mc0_mce;
 		fam_ops->mc1_mce = f14h_mc1_mce;
+		fam_ops->mc2_mce = k8_mc2_mce;
 		break;
 
 	case 0x15:
 		xec_mask = 0x1f;
 		fam_ops->mc0_mce = f15h_mc0_mce;
 		fam_ops->mc1_mce = f15h_mc1_mce;
+		fam_ops->mc2_mce = f15h_mc2_mce;
 		break;
 
 	default:
diff --git a/drivers/edac/mce_amd.h b/drivers/edac/mce_amd.h
index 6796799..000f6e2 100644
--- a/drivers/edac/mce_amd.h
+++ b/drivers/edac/mce_amd.h
@@ -78,6 +78,7 @@ extern const char * const ii_msgs[];
 struct amd_decoder_ops {
 	bool (*mc0_mce)(u16, u8);
 	bool (*mc1_mce)(u16, u8);
+	bool (*mc2_mce)(u16, u8);
 };
 
 void amd_report_gart_errors(bool);
-- 
1.7.9.5


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