linux-kernel - [RFC] arm: Add generic smc wrapper

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-next>] [day] [month] [year] [list]

Message-Id: <1443701047-10101-1-git-send-email-larper@axis.com>
Date:	Thu,  1 Oct 2015 14:04:07 +0200
From:	Lars Persson <lars.persson@...s.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	Lars Persson <larper@...s.com>
Subject: [RFC] arm: Add generic smc wrapper

This adds an smc wrapper according to the ARM standard for secure
monitor calling conventions (ARM DEN 0028A).

Signed-off-by: Lars Persson <larper@...s.com>
---
 arch/arm/include/asm/smc-call.h | 12 ++++++++++++
 arch/arm/kernel/Makefile        |  2 ++
 arch/arm/kernel/smc-call.S      | 22 ++++++++++++++++++++++
 3 files changed, 36 insertions(+)
 create mode 100644 arch/arm/include/asm/smc-call.h
 create mode 100644 arch/arm/kernel/smc-call.S

diff --git a/arch/arm/include/asm/smc-call.h b/arch/arm/include/asm/smc-call.h
new file mode 100644
index 0000000..88a83d4
--- /dev/null
+++ b/arch/arm/include/asm/smc-call.h
@@ -0,0 +1,12 @@
+/*
+ * Wrapper for secure monitor calls using the ARM SMC calling
+ * convention.
+ */
+#ifndef __ASM_SMC_CALL_H
+#define __ASM_SMC_CALL_H
+
+#include <linux/types.h>
+
+extern int invoke_smc(u32 function_id, u32 arg0, u32 arg1, u32 arg2);
+
+#endif
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index af9e59b..f09d2d6 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -92,4 +92,6 @@ obj-y				+= psci-call.o
 obj-$(CONFIG_SMP)		+= psci_smp.o
 endif
 
+obj-y		+= smc-call.o
+
 extra-y := $(head-y) vmlinux.lds
diff --git a/arch/arm/kernel/smc-call.S b/arch/arm/kernel/smc-call.S
new file mode 100644
index 0000000..a07ebf9
--- /dev/null
+++ b/arch/arm/kernel/smc-call.S
@@ -0,0 +1,22 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Copied from: psci-call.S.
+ */
+
+#include <linux/linkage.h>
+
+#include <asm/opcodes-sec.h>
+
+/* int invoke_smc(u32 function_id, u32 arg0, u32 arg1, u32 arg2) */
+ENTRY(invoke_smc)
+	__SMC(0)
+	bx	lr
+ENDPROC(invoke_smc)
-- 
2.1.4

--
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/