X-Git-Url: https://repo.jachan.dev/linux.git/blobdiff_plain/ae574a5d7aa1d80469dfcbaa757db2bea536ee66..db1a19b38f3a85f475b4ad716c71be133d8ca48e:/arch/ia64/kernel/mca_drv.c

diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index 37c88eb55873..a45009d2bc90 100644
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -8,7 +8,6 @@
  * Copyright (C) 2005 Keith Owens <kaos@sgi.com>
  * Copyright (C) 2006 Russ Anderson <rja@sgi.com>
  */
-#include <linux/config.h>
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/sched.h>
@@ -62,6 +61,11 @@ typedef enum {
 	ISOLATE_NONE
 } isolate_status_t;
 
+typedef enum {
+	MCA_NOT_RECOVERED = 0,
+	MCA_RECOVERED	  = 1
+} recovery_status_t;
+
 /*
  *  This pool keeps pointers to the section part of SAL error record
  */
@@ -71,6 +75,34 @@ static struct {
 	int	     max_idx; /* Maximum index of section pointer list pool */
 } slidx_pool;
 
+static int
+fatal_mca(const char *fmt, ...)
+{
+	va_list args;
+	char buf[256];
+
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+	ia64_mca_printk(KERN_ALERT "MCA: %s\n", buf);
+
+	return MCA_NOT_RECOVERED;
+}
+
+static int
+mca_recovered(const char *fmt, ...)
+{
+	va_list args;
+	char buf[256];
+
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+	ia64_mca_printk(KERN_INFO "MCA: %s\n", buf);
+
+	return MCA_RECOVERED;
+}
+
 /**
  * mca_page_isolate - isolate a poisoned page in order not to use it later
  * @paddr:	poisoned memory location
@@ -124,6 +156,7 @@ mca_page_isolate(unsigned long paddr)
 void
 mca_handler_bh(unsigned long paddr, void *iip, unsigned long ipsr)
 {
+	ia64_mlogbuf_dump();
 	printk(KERN_ERR "OS_MCA: process [cpu %d, pid: %d, uid: %d, "
 		"iip: %p, psr: 0x%lx,paddr: 0x%lx](%s) encounters MCA.\n",
 		raw_smp_processor_id(), current->pid, current->uid,
@@ -424,7 +457,7 @@ recover_from_read_error(slidx_table_t *slidx,
 
 	/* Is target address valid? */
 	if (!pbci->tv)
-		return 0;
+		return fatal_mca("target address not valid");
 
 	/*
 	 * cpu read or memory-mapped io read
@@ -442,7 +475,7 @@ recover_from_read_error(slidx_table_t *slidx,
 
 	/* Is minstate valid? */
 	if (!peidx_bottom(peidx) || !(peidx_bottom(peidx)->valid.minstate))
-		return 0;
+		return fatal_mca("minstate not valid");
 	psr1 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_ipsr);
 	psr2 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_xpsr);
 
@@ -476,12 +509,14 @@ recover_from_read_error(slidx_table_t *slidx,
 			psr2->bn  = 1;
 			psr2->i  = 0;
 
-			return 1;
+			return mca_recovered("user memory corruption. "
+				"kill affected process - recovered.");
 		}
 
 	}
 
-	return 0;
+	return fatal_mca("kernel context not recovered, iip 0x%lx\n",
+			 pmsa->pmsa_iip);
 }
 
 /**
@@ -567,13 +602,13 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
 	 * The machine check is corrected.
 	 */
 	if (psp->cm == 1)
-		return 1;
+		return mca_recovered("machine check is already corrected.");
 
 	/*
 	 * The error was not contained.  Software must be reset.
 	 */
 	if (psp->us || psp->ci == 0)
-		return 0;
+		return fatal_mca("error not contained");
 
 	/*
 	 * The cache check and bus check bits have four possible states
@@ -584,20 +619,22 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
 	 *    1  1	Memory error, attempt recovery
 	 */
 	if (psp->bc == 0 || pbci == NULL)
-		return 0;
+		return fatal_mca("No bus check");
 
 	/*
 	 * Sorry, we cannot handle so many.
 	 */
 	if (peidx_bus_check_num(peidx) > 1)
-		return 0;
+		return fatal_mca("Too many bus checks");
 	/*
 	 * Well, here is only one bus error.
 	 */
-	if (pbci->ib || pbci->cc)
-		return 0;
+	if (pbci->ib)
+		return fatal_mca("Internal Bus error");
+	if (pbci->cc)
+		return fatal_mca("Cache-cache error");
 	if (pbci->eb && pbci->bsi > 0)
-		return 0;
+		return fatal_mca("External bus check fatal status");
 
 	/*
 	 * This is a local MCA and estimated as recoverble external bus error.
@@ -609,7 +646,7 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
 	/*
 	 * On account of strange SAL error record, we cannot recover.
 	 */
-	return 0;
+	return fatal_mca("Strange SAL record");
 }
 
 /**
@@ -638,12 +675,10 @@ mca_try_to_recover(void *rec, struct ia64_sal_os_state *sos)
 
 	 /* Now, OS can recover when there is one processor error section */
 	if (n_proc_err > 1)
-		return 0;
-	else if (n_proc_err == 0) {
-		/* Weird SAL record ... We need not to recover */
-
-		return 1;
-	}
+		return fatal_mca("Too Many Errors");
+	else if (n_proc_err == 0)
+		/* Weird SAL record ... We can't do anything */
+		return fatal_mca("Weird SAL record");
 
 	/* Make index of processor error section */
 	mca_make_peidx((sal_log_processor_info_t*)
@@ -654,7 +689,7 @@ mca_try_to_recover(void *rec, struct ia64_sal_os_state *sos)
 
 	/* Check whether MCA is global or not */
 	if (is_mca_global(&peidx, &pbci, sos))
-		return 0;
+		return fatal_mca("global MCA");
 	
 	/* Try to recover a processor error */
 	return recover_from_processor_error(platform_err, &slidx, &peidx,