From: "Fernando Luis Vázquez Cao" <fernando@oss.ntt.co.jp>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Don Zickus <dzickus@redhat.com>,
linux-tip-commits@vger.kernel.org, torvalds@linux-foundation.org,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com,
mingo@elte.hu, Yinghai Lu <yinghai@kernel.org>,
akpm@linux-foundation.org, vgoyal@redhat.com
Subject: [PATCH 2/2] boot: add early NMI counter
Date: Wed, 07 Mar 2012 19:56:48 +0900 [thread overview]
Message-ID: <4F573EF0.1080501@oss.ntt.co.jp> (raw)
In-Reply-To: <4F573E74.5040504@oss.ntt.co.jp>
[-- Attachment #1: Type: text/plain, Size: 1 bytes --]
[-- Attachment #2: add-early-nmi-counter.patch --]
[-- Type: text/x-patch, Size: 2106 bytes --]
Subject: [PATCH] boot: add early NMI counter
From: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
We currently ignore early NMIs but it would be nice to be able to
know whether they actually occurred.
This patch adds an early NMI counter and exports it trough
/proc/interrupts with the name of ENM (Early NMI).
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
---
diff -urNp linux-3.3-rc6-orig/arch/x86/include/asm/processor.h linux-3.3-rc6/arch/x86/include/asm/processor.h
--- linux-3.3-rc6-orig/arch/x86/include/asm/processor.h 2012-03-07 15:49:01.826241682 +0900
+++ linux-3.3-rc6/arch/x86/include/asm/processor.h 2012-03-07 18:52:27.668054122 +0900
@@ -402,6 +402,7 @@ DECLARE_PER_CPU(char *, irq_stack_ptr);
DECLARE_PER_CPU(unsigned int, irq_count);
extern unsigned long kernel_eflags;
extern asmlinkage void ignore_sysret(void);
+extern unsigned int early_nmi_count;
#else /* X86_64 */
#ifdef CONFIG_CC_STACKPROTECTOR
/*
diff -urNp linux-3.3-rc6-orig/arch/x86/kernel/head_64.S linux-3.3-rc6/arch/x86/kernel/head_64.S
--- linux-3.3-rc6-orig/arch/x86/kernel/head_64.S 2012-03-07 18:51:17.583160114 +0900
+++ linux-3.3-rc6/arch/x86/kernel/head_64.S 2012-03-07 18:54:37.205699422 +0900
@@ -327,6 +327,7 @@ early_exception_handler:
jmp 1b
early_nmi_handler:
+ incl early_nmi_count(%rip) # exported as ENM in /proc/interrupts
iretq
#ifdef CONFIG_EARLY_PRINTK
@@ -340,6 +341,10 @@ early_idt_ripmsg:
#endif /* CONFIG_EARLY_PRINTK */
.previous
+ .globl early_nmi_count
+early_nmi_count:
+ .long 0
+
#define NEXT_PAGE(name) \
.balign PAGE_SIZE; \
ENTRY(name)
diff -urNp linux-3.3-rc6-orig/arch/x86/kernel/irq.c linux-3.3-rc6/arch/x86/kernel/irq.c
--- linux-3.3-rc6-orig/arch/x86/kernel/irq.c 2012-03-07 15:49:01.838241839 +0900
+++ linux-3.3-rc6/arch/x86/kernel/irq.c 2012-03-07 18:55:14.078179448 +0900
@@ -125,6 +125,7 @@ int arch_show_interrupts(struct seq_file
#if defined(CONFIG_X86_IO_APIC)
seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
#endif
+ seq_printf(p, "%*s: %10u\n", prec, "ENM", early_nmi_count);
return 0;
}
[-- Attachment #3: Type: text/plain, Size: 143 bytes --]
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WARNING: multiple messages have this Message-ID (diff)
From: "Fernando Luis Vázquez Cao" <fernando@oss.ntt.co.jp>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Don Zickus <dzickus@redhat.com>,
linux-tip-commits@vger.kernel.org,
Yinghai Lu <yinghai@kernel.org>,
mingo@elte.hu, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com,
akpm@linux-foundation.org, torvalds@linux-foundation.org,
tglx@linutronix.de, vgoyal@redhat.com
Subject: [PATCH 2/2] boot: add early NMI counter
Date: Wed, 07 Mar 2012 19:56:48 +0900 [thread overview]
Message-ID: <4F573EF0.1080501@oss.ntt.co.jp> (raw)
In-Reply-To: <4F573E74.5040504@oss.ntt.co.jp>
[-- Attachment #1: Type: text/plain, Size: 1 bytes --]
[-- Attachment #2: add-early-nmi-counter.patch --]
[-- Type: text/x-patch, Size: 2106 bytes --]
Subject: [PATCH] boot: add early NMI counter
From: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
We currently ignore early NMIs but it would be nice to be able to
know whether they actually occurred.
This patch adds an early NMI counter and exports it trough
/proc/interrupts with the name of ENM (Early NMI).
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
---
diff -urNp linux-3.3-rc6-orig/arch/x86/include/asm/processor.h linux-3.3-rc6/arch/x86/include/asm/processor.h
--- linux-3.3-rc6-orig/arch/x86/include/asm/processor.h 2012-03-07 15:49:01.826241682 +0900
+++ linux-3.3-rc6/arch/x86/include/asm/processor.h 2012-03-07 18:52:27.668054122 +0900
@@ -402,6 +402,7 @@ DECLARE_PER_CPU(char *, irq_stack_ptr);
DECLARE_PER_CPU(unsigned int, irq_count);
extern unsigned long kernel_eflags;
extern asmlinkage void ignore_sysret(void);
+extern unsigned int early_nmi_count;
#else /* X86_64 */
#ifdef CONFIG_CC_STACKPROTECTOR
/*
diff -urNp linux-3.3-rc6-orig/arch/x86/kernel/head_64.S linux-3.3-rc6/arch/x86/kernel/head_64.S
--- linux-3.3-rc6-orig/arch/x86/kernel/head_64.S 2012-03-07 18:51:17.583160114 +0900
+++ linux-3.3-rc6/arch/x86/kernel/head_64.S 2012-03-07 18:54:37.205699422 +0900
@@ -327,6 +327,7 @@ early_exception_handler:
jmp 1b
early_nmi_handler:
+ incl early_nmi_count(%rip) # exported as ENM in /proc/interrupts
iretq
#ifdef CONFIG_EARLY_PRINTK
@@ -340,6 +341,10 @@ early_idt_ripmsg:
#endif /* CONFIG_EARLY_PRINTK */
.previous
+ .globl early_nmi_count
+early_nmi_count:
+ .long 0
+
#define NEXT_PAGE(name) \
.balign PAGE_SIZE; \
ENTRY(name)
diff -urNp linux-3.3-rc6-orig/arch/x86/kernel/irq.c linux-3.3-rc6/arch/x86/kernel/irq.c
--- linux-3.3-rc6-orig/arch/x86/kernel/irq.c 2012-03-07 15:49:01.838241839 +0900
+++ linux-3.3-rc6/arch/x86/kernel/irq.c 2012-03-07 18:55:14.078179448 +0900
@@ -125,6 +125,7 @@ int arch_show_interrupts(struct seq_file
#if defined(CONFIG_X86_IO_APIC)
seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
#endif
+ seq_printf(p, "%*s: %10u\n", prec, "ENM", early_nmi_count);
return 0;
}
next prev parent reply other threads:[~2012-03-07 10:56 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-11 23:09 [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path tip-bot for Don Zickus
2012-02-12 1:04 ` Yinghai Lu
2012-02-12 1:04 ` Yinghai Lu
2012-02-12 3:13 ` Eric W. Biederman
2012-02-12 3:13 ` Eric W. Biederman
2012-02-12 4:17 ` Yinghai Lu
2012-02-12 4:17 ` Yinghai Lu
2012-02-13 12:52 ` Eric W. Biederman
2012-02-13 12:52 ` Eric W. Biederman
2012-02-13 16:51 ` Yinghai Lu
2012-02-13 16:51 ` Yinghai Lu
2012-02-13 18:16 ` Yinghai Lu
2012-02-13 18:16 ` Yinghai Lu
2012-02-16 17:27 ` Don Zickus
2012-02-16 17:27 ` Don Zickus
2012-02-16 21:53 ` Yinghai Lu
2012-02-16 21:53 ` Yinghai Lu
2012-02-16 21:56 ` Don Zickus
2012-02-16 21:56 ` Don Zickus
2012-02-17 3:38 ` Eric W. Biederman
2012-02-17 3:38 ` Eric W. Biederman
2012-02-17 12:41 ` Eric W. Biederman
2012-02-17 12:41 ` Eric W. Biederman
2012-02-17 15:49 ` HATAYAMA Daisuke
2012-02-17 15:49 ` HATAYAMA Daisuke
2012-02-17 20:18 ` Don Zickus
2012-02-17 20:18 ` Don Zickus
2012-02-20 5:17 ` HATAYAMA Daisuke
2012-02-20 5:17 ` HATAYAMA Daisuke
2012-02-20 15:24 ` Don Zickus
2012-02-20 15:24 ` Don Zickus
2012-02-17 19:54 ` Don Zickus
2012-02-17 19:54 ` Don Zickus
2012-02-18 3:21 ` Eric W. Biederman
2012-02-18 3:21 ` Eric W. Biederman
2012-02-20 15:14 ` Don Zickus
2012-02-20 15:14 ` Don Zickus
2012-02-21 8:01 ` Eric W. Biederman
2012-02-21 8:01 ` Eric W. Biederman
2012-02-21 13:59 ` Don Zickus
2012-02-21 13:59 ` Don Zickus
2012-02-29 23:19 ` Eric W. Biederman
2012-02-29 23:19 ` Eric W. Biederman
2012-03-07 10:53 ` Fernando Luis Vázquez Cao
2012-03-07 10:53 ` Fernando Luis Vázquez Cao
2012-03-07 10:54 ` [PATCH 1/2] boot: ignore early NMIs Fernando Luis Vázquez Cao
2012-03-07 10:54 ` Fernando Luis Vázquez Cao
2012-03-07 10:56 ` Fernando Luis Vázquez Cao [this message]
2012-03-07 10:56 ` [PATCH 2/2] boot: add early NMI counter Fernando Luis Vázquez Cao
2012-03-08 4:50 ` Eric W. Biederman
2012-03-08 4:50 ` Eric W. Biederman
2012-03-08 6:00 ` Fernando Luis Vázquez Cao
2012-03-08 6:00 ` Fernando Luis Vázquez Cao
2012-03-08 4:41 ` [PATCH 1/2] boot: ignore early NMIs Eric W. Biederman
2012-03-08 4:41 ` Eric W. Biederman
2012-03-08 5:53 ` Fernando Luis Vázquez Cao
2012-03-08 5:53 ` Fernando Luis Vázquez Cao
2012-03-08 16:35 ` Eric W. Biederman
2012-03-08 16:35 ` Eric W. Biederman
2012-03-09 9:31 ` Fernando Luis Vázquez Cao
2012-03-09 9:31 ` Fernando Luis Vázquez Cao
2012-03-09 9:51 ` [PATCH 1/3] boot: fortify early_idt_handlers definition Fernando Luis Vázquez Cao
2012-03-09 9:51 ` Fernando Luis Vázquez Cao
2012-03-09 9:55 ` [PATCH 2/3] boot: ignore early NMIs Fernando Luis Vázquez Cao
2012-03-09 9:55 ` Fernando Luis Vázquez Cao
2012-03-09 10:01 ` [PATCH 3/3] boot: add early NMI counter Fernando Luis Vázquez Cao
2012-03-09 10:01 ` Fernando Luis Vázquez Cao
2012-03-09 20:52 ` [PATCH 1/2] boot: ignore early NMIs H. Peter Anvin
2012-03-09 20:52 ` H. Peter Anvin
2012-03-12 5:43 ` Fernando Luis Vázquez Cao
2012-03-12 5:43 ` Fernando Luis Vázquez Cao
2012-03-12 5:49 ` H. Peter Anvin
2012-03-12 5:49 ` H. Peter Anvin
2012-03-12 6:14 ` Fernando Luis Vázquez Cao
2012-03-12 6:14 ` Fernando Luis Vázquez Cao
2012-03-12 13:36 ` Vivek Goyal
2012-03-12 13:36 ` Vivek Goyal
2012-03-12 19:02 ` Eric W. Biederman
2012-03-12 19:02 ` Eric W. Biederman
2012-03-12 19:58 ` Vivek Goyal
2012-03-12 19:58 ` Vivek Goyal
2012-03-12 20:02 ` H. Peter Anvin
2012-03-12 20:02 ` H. Peter Anvin
2012-03-12 18:40 ` H. Peter Anvin
2012-03-12 18:40 ` H. Peter Anvin
2012-03-12 20:01 ` Eric W. Biederman
2012-03-12 20:01 ` Eric W. Biederman
2012-03-12 20:04 ` H. Peter Anvin
2012-03-12 20:04 ` H. Peter Anvin
2012-03-12 20:16 ` H. Peter Anvin
2012-03-12 20:16 ` H. Peter Anvin
2012-03-13 2:11 ` Fernando Luis Vázquez Cao
2012-03-13 2:11 ` Fernando Luis Vázquez Cao
2012-03-13 13:33 ` Don Zickus
2012-03-13 13:33 ` Don Zickus
2012-03-15 0:43 ` Simon Horman
2012-03-15 0:43 ` Simon Horman
2012-03-13 1:43 ` Fernando Luis Vázquez Cao
2012-03-13 1:43 ` Fernando Luis Vázquez Cao
2012-03-12 14:41 ` Don Zickus
2012-03-12 14:41 ` Don Zickus
2012-03-07 15:50 ` [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path Vivek Goyal
2012-03-07 15:50 ` Vivek Goyal
2012-03-07 18:27 ` Yinghai Lu
2012-03-07 18:27 ` Yinghai Lu
2012-03-08 1:29 ` Fernando Luis Vázquez Cao
2012-03-08 1:29 ` Fernando Luis Vázquez Cao
2012-03-09 0:59 ` HATAYAMA Daisuke
2012-03-09 0:59 ` HATAYAMA Daisuke
2012-03-09 2:48 ` Eric W. Biederman
2012-03-09 2:48 ` Eric W. Biederman
2012-02-12 11:12 ` Ingo Molnar
2012-02-12 11:12 ` Ingo Molnar
2012-02-13 15:28 ` Don Zickus
2012-02-13 15:28 ` Don Zickus
2012-02-13 16:52 ` Yinghai Lu
2012-02-13 16:52 ` Yinghai Lu
2012-02-13 22:12 ` Don Zickus
2012-02-13 22:12 ` Don Zickus
2012-02-13 22:51 ` Don Zickus
2012-02-13 22:51 ` Don Zickus
2012-02-16 2:53 ` Don Zickus
2012-02-16 2:53 ` Don Zickus
2012-02-16 18:43 ` Yinghai Lu
2012-02-16 18:43 ` Yinghai Lu
2012-02-16 21:41 ` Don Zickus
2012-02-16 21:41 ` Don Zickus
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