linux-kernel - [ 18/95] parisc: show number of FPE and unaligned access handler calls in /proc/interrupts

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]

Message-Id: <20130625182155.703552446@linuxfoundation.org>
Date:	Tue, 25 Jun 2013 11:32:05 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Helge Deller <deller@....de>
Subject: [ 18/95] parisc: show number of FPE and unaligned access handler calls in /proc/interrupts

3.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Helge Deller <deller@....de>

commit d0c3be806a3fe7f4abdb0f7e7287addb55e73f35 upstream.

Show number of floating point assistant and unaligned access fixup
handler in /proc/interrupts file.

Signed-off-by: Helge Deller <deller@....de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/parisc/include/asm/hardirq.h |    2 ++
 arch/parisc/kernel/irq.c          |    8 ++++++++
 arch/parisc/kernel/traps.c        |    1 +
 arch/parisc/kernel/unaligned.c    |    3 +++
 4 files changed, 14 insertions(+)

--- a/arch/parisc/include/asm/hardirq.h
+++ b/arch/parisc/include/asm/hardirq.h
@@ -28,6 +28,8 @@ typedef struct {
 	unsigned int irq_resched_count;
 	unsigned int irq_call_count;
 #endif
+	unsigned int irq_unaligned_count;
+	unsigned int irq_fpassist_count;
 	unsigned int irq_tlb_count;
 } ____cacheline_aligned irq_cpustat_t;
 
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -188,6 +188,14 @@ int arch_show_interrupts(struct seq_file
 		seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
 	seq_puts(p, "  Function call interrupts\n");
 #endif
+	seq_printf(p, "%*s: ", prec, "UAH");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", irq_stats(j)->irq_unaligned_count);
+	seq_puts(p, "  Unaligned access handler traps\n");
+	seq_printf(p, "%*s: ", prec, "FPA");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", irq_stats(j)->irq_fpassist_count);
+	seq_puts(p, "  Floating point assist traps\n");
 	seq_printf(p, "%*s: ", prec, "TLB");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -652,6 +652,7 @@ void notrace handle_interruption(int cod
 	case 14:
 		/* Assist Exception Trap, i.e. floating point exception. */
 		die_if_kernel("Floating point exception", regs, 0); /* quiet */
+		__inc_irq_stat(irq_fpassist_count);
 		handle_fpe(regs);
 		return;
 		
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -27,6 +27,7 @@
 #include <linux/signal.h>
 #include <linux/ratelimit.h>
 #include <asm/uaccess.h>
+#include <asm/hardirq.h>
 
 /* #define DEBUG_UNALIGNED 1 */
 
@@ -454,6 +455,8 @@ void handle_unaligned(struct pt_regs *re
 	struct siginfo si;
 	register int flop=0;	/* true if this is a flop */
 
+	__inc_irq_stat(irq_unaligned_count);
+
 	/* log a message with pacing */
 	if (user_mode(regs)) {
 		if (current->thread.flags & PARISC_UAC_SIGBUS) {


--
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/