Messages in this thread Patch in this message | | | From | Lars Persson <> | Subject | [PATCH 1/1] arm: Add generic smc wrapper | Date | Fri, 9 Oct 2015 17:33:33 +0200 |
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This adds an smc wrapper according to the ARM standard for secure monitor calling conventions (ARM DEN 0028A).
Signed-off-by: Lars Persson <larper@axis.com> --- arch/arm/include/asm/smc-call.h | 12 ++++++++++++ arch/arm/kernel/Makefile | 3 +++ arch/arm/kernel/smc-call.S | 22 ++++++++++++++++++++++ 3 files changed, 37 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..73c95e0 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -92,4 +92,7 @@ obj-y += psci-call.o obj-$(CONFIG_SMP) += psci_smp.o endif +obj-$(CONFIG_CPU_V6) += smc-call.o +obj-$(CONFIG_CPU_V7) += 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
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