linux-kernel - [PATCH 01/12] EDAC, MCE: Select extended error code mask

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 10 Nov 2010 20:02:10 +0100
From:	Borislav Petkov <bp@...64.org>
To:	<linux-edac@...r.kernel.org>
Cc:	<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH 01/12] EDAC, MCE: Select extended error code mask

From: Borislav Petkov <borislav.petkov@....com>

F15h enlarges the extended error code of an MCE to a 5-bit field
(MCi_STATUS[20:16]). Add a mask variable which default 0xf is overridden
on F15h.

Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
 drivers/edac/mce_amd.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index c018109..01853ee 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -5,6 +5,7 @@
 
 static struct amd_decoder_ops *fam_ops;
 
+static u8 xec_mask	 = 0xf;
 static u8 nb_err_cpumask = 0xf;
 
 static bool report_gart_errors;
@@ -172,7 +173,7 @@ static bool f14h_dc_mce(u16 ec)
 static void amd_decode_dc_mce(struct mce *m)
 {
 	u16 ec = m->status & 0xffff;
-	u8 xec = (m->status >> 16) & 0xf;
+	u8 xec = (m->status >> 16) & xec_mask;
 
 	pr_emerg(HW_ERR "Data Cache Error: ");
 
@@ -257,7 +258,7 @@ static bool f14h_ic_mce(u16 ec)
 static void amd_decode_ic_mce(struct mce *m)
 {
 	u16 ec = m->status & 0xffff;
-	u8 xec = (m->status >> 16) & 0xf;
+	u8 xec = (m->status >> 16) & xec_mask;
 
 	pr_emerg(HW_ERR "Instruction Cache Error: ");
 
@@ -277,7 +278,7 @@ static void amd_decode_ic_mce(struct mce *m)
 static void amd_decode_bu_mce(struct mce *m)
 {
 	u32 ec = m->status & 0xffff;
-	u32 xec = (m->status >> 16) & 0xf;
+	u32 xec = (m->status >> 16) & xec_mask;
 
 	pr_emerg(HW_ERR "Bus Unit Error");
 
@@ -319,7 +320,7 @@ wrong_bu_mce:
 static void amd_decode_ls_mce(struct mce *m)
 {
 	u16 ec = m->status & 0xffff;
-	u8 xec = (m->status >> 16) & 0xf;
+	u8 xec = (m->status >> 16) & xec_mask;
 
 	if (boot_cpu_data.x86 == 0x14) {
 		pr_emerg("You shouldn't be seeing an LS MCE on this cpu family,"
@@ -651,6 +652,10 @@ static int __init mce_amd_init(void)
 		fam_ops->nb_mce = nb_noop_mce;
 		break;
 
+	case 0x15:
+		xec_mask = 0x1f;
+		break;
+
 	default:
 		printk(KERN_WARNING "Huh? What family is that: %d?!\n",
 				    boot_cpu_data.x86);
-- 
1.7.3.1.50.g1e633

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/