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From: Sam Ravnborg <sam@ravnborg.org>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH v2 04/10] ARM: add file for HYP mode related setup
Date: Sat, 24 Mar 2018 11:10:19 +0100	[thread overview]
Message-ID: <20180324101019.GB3784@ravnborg.org> (raw)
In-Reply-To: <20180323231422.21137-4-l.stach@pengutronix.de>

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@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

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  reply	other threads:[~2018-03-24 10:10 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-23 23:14 [PATCH v2 01/10] ARM: import opcode helpers from Linux kernel Lucas Stach
2018-03-23 23:14 ` [PATCH v2 02/10] ARM: safely switch from HYP to SVC mode if required Lucas Stach
2018-03-24 10:06   ` Sam Ravnborg
2018-03-23 23:14 ` [PATCH v2 03/10] ARM: allow secure monitor code to be built without PSCI Lucas Stach
2018-03-23 23:14 ` [PATCH v2 04/10] ARM: add file for HYP mode related setup Lucas Stach
2018-03-24 10:10   ` Sam Ravnborg [this message]
2018-03-23 23:14 ` [PATCH v2 05/10] ARM: don't try to install secure monitor when entered in HYP mode Lucas Stach
2018-03-23 23:14 ` [PATCH v2 06/10] ARM: default to starting kernel in HYP mode when entered in HYP Lucas Stach
2018-03-23 23:14 ` [PATCH v2 07/10] ARM: install HYP vectors at PBL and Barebox entry Lucas Stach
2018-03-23 23:14 ` [PATCH v2 08/10] ARM: rpi: add revision IDs for Pi 3 Model B and Pi Zero Lucas Stach
2018-03-24 10:13   ` Sam Ravnborg
2018-03-23 23:14 ` [PATCH v2 09/10] ARM: rpi: add raspberry pi 3 support Lucas Stach
2018-03-23 23:14 ` [PATCH v2 10/10] ARM: rpi: autosize malloc area Lucas Stach
2018-03-26 10:06 ` [PATCH v2 01/10] ARM: import opcode helpers from Linux kernel Roland Hieber

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