[PATCH v2 04/10] ARM: add file for HYP mode related setup

[Sam Ravnborg]

On Sat, Mar 24, 2018 at 12:14:16AM +0100, Lucas Stach wrote:
> This adds routines to add hyp mode vectors and switch back to HYP
> mode from SVC. This is needed in both the PBL and Barebox proper.
> 
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
> ---
>  arch/arm/cpu/Makefile         |   4 ++
>  arch/arm/cpu/hyp.S            | 115 ++++++++++++++++++++++++++++++++++++++++++
>  arch/arm/cpu/sm_as.S          |  11 ----
>  arch/arm/include/asm/secure.h |   8 +++
>  4 files changed, 127 insertions(+), 11 deletions(-)
>  create mode 100644 arch/arm/cpu/hyp.S
> 
> diff --git a/arch/arm/cpu/Makefile b/arch/arm/cpu/Makefile
> index 13fe12c31f6f..f86dff975bb4 100644
> --- a/arch/arm/cpu/Makefile
> +++ b/arch/arm/cpu/Makefile
> @@ -9,6 +9,10 @@ obj-$(CONFIG_ARM_EXCEPTIONS) += exceptions.o
>  obj-$(CONFIG_MMU) += mmu.o mmu-early.o
>  pbl-$(CONFIG_MMU) += mmu-early.o
>  lwl-y += lowlevel.o
> +obj-y += hyp.o
> +AFLAGS_hyp.o :=-Wa,-march=armv7-a -Wa,-mcpu=all
> +pbl-y += hyp.o
> +AFLAGS_pbl-hyp.o :=-Wa,-march=armv7-a -Wa,-mcpu=all
>  endif
>  
>  obj-$(CONFIG_ARM_EXCEPTIONS) += interrupts.o
> diff --git a/arch/arm/cpu/hyp.S b/arch/arm/cpu/hyp.S
> new file mode 100644
> index 000000000000..435d416f980a
> --- /dev/null
> +++ b/arch/arm/cpu/hyp.S
> @@ -0,0 +1,115 @@
> +#include <linux/linkage.h>
> +#include <asm/system.h>
> +#include <asm/opcodes-virt.h>
> +
> +.arch_extension sec
> +.arch_extension virt
> +
> +.section ".text_bare_init_","ax"
Here you could use __BARE_INIT - from init.h

	Sam