linux-kernel - [PATCH v2 11/11] irqdomain: Include hwirq number 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]

Date:	Fri, 14 Jun 2013 22:08:06 +0100
From:	Grant Likely <grant.likely@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: [PATCH v2 11/11] irqdomain: Include hwirq number in /proc/interrupts

From: Grant Likely <grant.likely@...retlab.ca>

Add the hardware interrupt number to the output of /proc/interrupts.
It is often important to have access to the hardware interrupt number because
it identifies exactly how an interrupt signal is wired up to the interrupt
controller.  This is especially important when using irq_domains since irq
numbers get dynamically allocated in that case, and have no relation to the
actual hardware number.

Note: This output is currently conditional on whether or not the irq_domain
pointer is set; however hwirq could still be used without irq_domain.  It
may be worthwhile to always output the hwirq number regardless of the
domain pointer.

Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
Tested-by: Olof Johansson <olof@...om.net>
Cc: Ben Herrenschmidt <benh@...nel.crashing.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/irq/proc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 19ed5c4..36f6ee1 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -462,6 +462,8 @@ int show_interrupts(struct seq_file *p, void *v)
 	} else {
 		seq_printf(p, " %8s", "None");
 	}
+	if (desc->irq_data.domain)
+		seq_printf(p, " %*d", prec, (int) desc->irq_data.hwirq);
 #ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL
 	seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
 #endif
-- 
1.8.1.2

--
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/