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  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:	Mon, 28 Jul 2014 16:16:23 -0500
From:	Felipe Balbi <balbi@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>, <bcousson@...libre.com>,
	<linux@....linux.org.uk>, <khilman@...prootsystems.com>,
	<tglx@...utronix.de>, <jason@...edaemon.net>,
	<devicetree@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Felipe Balbi <balbi@...com>
Subject: [PATCH 35/35] irq: intc: enable IP protection

When PROTECTION bit in enabled in PROTECTION
register, INTC's registers are only accessible
from privileged mode.

Signed-off-by: Felipe Balbi <balbi@...com>
---
 drivers/irqchip/irq-omap-intc.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-omap-intc.c b/drivers/irqchip/irq-omap-intc.c
index 371ff5e..28c8b6d 100644
--- a/drivers/irqchip/irq-omap-intc.c
+++ b/drivers/irqchip/irq-omap-intc.c
@@ -52,6 +52,8 @@
 #define INTCPS_NR_ILR_REGS	128
 #define INTCPS_NR_MIR_REGS	3
 
+#define INTC_PROTECTION_ENABLE	(1 << 0)
+
 /*
  * OMAP2 has a number of different interrupt controllers, each interrupt
  * controller is identified as its own "bank". Register definitions are
@@ -291,12 +293,28 @@ static int __init omap_init_irq_legacy(u32 base)
 	return 0;
 }
 
+static void __init omap_irq_enable_protection(void)
+{
+	u32 reg;
+
+	reg = intc_readl(INTC_PROTECTION);
+	reg |= INTC_PROTECTION_ENABLE;
+	intc_writel(INTC_PROTECTION, reg);
+}
+
 static int __init omap_init_irq(u32 base, struct device_node *node)
 {
+	int ret;
+
 	if (node)
-		return omap_init_irq_of(node);
+		ret = omap_init_irq_of(node);
 	else
-		return omap_init_irq_legacy(base);
+		ret = omap_init_irq_legacy(base);
+
+	if (ret == 0)
+		omap_irq_enable_protection();
+
+	return ret;
 }
 
 static asmlinkage void __exception_irq_entry
-- 
2.0.1.563.g66f467c

--
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/

Powered by blists - more mailing lists