From 4cabfce1d55cf437b85ee10cd05504e88d4fa29b Mon Sep 17 00:00:00 2001
From: Ruidong Tian <[email protected]>
Date: Tue, 17 Dec 2024 14:39:42 +0800
Subject: [PATCH 83/85] rasdaemon: mce: decode io port for bus error

mcelog decode bus error with io port like:

  ...
  MCA: BUS error: 0 0 Level-3 Generic IO Request-did-not-timeout
  IO MCA reported by root port 0:7b:07.0
  ...

Introduce the code into rasdaemon.

Signed-off-by: Ruidong Tian <[email protected]>
---
 mce-intel.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/mce-intel.c b/mce-intel.c
index 3006e8f..a18cce4 100644
--- a/mce-intel.c
+++ b/mce-intel.c
@@ -21,6 +21,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <stdint.h>
 #include <string.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -233,6 +234,8 @@ static char *get_RRRR_str(uint8_t rrrr)
 static void decode_mca(struct mce_event *e, uint64_t track, int *ismemerr)
 {
 	uint32_t mca = e->status & 0xffffL;
+	uint64_t status = e->status;
+	uint64_t misc = e->misc;
 
 	if (mca & (1UL << 12)) {
 		mce_snprintf(e->mcastatus_msg,
@@ -282,6 +285,16 @@ static void decode_mca(struct mce_event *e, uint64_t track, int *ismemerr)
 			     get_RRRR_str((mca & BUS_RRRR_MASK) >> BUS_RRRR_SHIFT),
 			     decode_attr(II, (mca & BUS_II_MASK) >> BUS_II_SHIFT),
 			     decode_attr(T, (mca & BUS_T_MASK) >> BUS_T_SHIFT));
+		if ((status & MCI_STATUS_MISCV) && (status & 0xefff) == 0x0e0b) {
+			int seg, bus, dev, fn;
+
+			seg = EXTRACT(misc, 32, 39);
+			bus = EXTRACT(misc, 24, 31);
+			dev = EXTRACT(misc, 19, 23);
+			fn = EXTRACT(misc, 16, 18);
+			mce_snprintf(e->mcastatus_msg, "IO MCA reported by root port %x:%02x:%02x.%x",
+				     seg, bus, dev, fn);
+		}
 	} else if (test_prefix(7, mca)) {
 		decode_memory_controller(e, mca);
 		*ismemerr = 1;
-- 
2.33.1