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Date:   Fri, 27 Mar 2020 10:17:33 -0600
From:   Mathieu Poirier <mathieu.poirier@linaro.org>
To:     Clement Leger <cleger@kalray.eu>
Cc:     Ohad Ben-Cohen <ohad@wizery.com>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Patrice Chotard <patrice.chotard@st.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-stm32@st-md-mailman.stormreply.com
Subject: Re: [PATCH] remoteproc: remove rproc_elf32_sanity_check
Message-ID: <20200327161733.GA18041@xps15>
References: <20200327084939.8321-1-cleger@kalray.eu>
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On Fri, Mar 27, 2020 at 09:49:39AM +0100, Clement Leger wrote:
> Since checks are present in the remoteproc elf loader before calling
> da_to_va, loading a elf64 will work on 32bits flavors of kernel.
> Indeed, if a segment size is larger than what size_t can hold, the
> loader will return an error so the functionality is equivalent to
> what exists today.
> 
> Signed-off-by: Clement Leger <cleger@kalray.eu>
> ---
>  drivers/remoteproc/remoteproc_core.c       |  2 +-
>  drivers/remoteproc/remoteproc_elf_loader.c | 21 ---------------------
>  drivers/remoteproc/remoteproc_internal.h   |  1 -
>  drivers/remoteproc/st_remoteproc.c         |  2 +-
>  drivers/remoteproc/st_slim_rproc.c         |  2 +-
>  drivers/remoteproc/stm32_rproc.c           |  2 +-
>  6 files changed, 4 insertions(+), 26 deletions(-)

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index a9ac1d01e09b..02ff076b0122 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -2069,7 +2069,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
>  		rproc->ops->parse_fw = rproc_elf_load_rsc_table;
>  		rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
>  		if (!rproc->ops->sanity_check)
> -			rproc->ops->sanity_check = rproc_elf32_sanity_check;
> +			rproc->ops->sanity_check = rproc_elf_sanity_check;
>  		rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
>  	}
>  
> diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
> index 16e2c496fd45..29034f99898d 100644
> --- a/drivers/remoteproc/remoteproc_elf_loader.c
> +++ b/drivers/remoteproc/remoteproc_elf_loader.c
> @@ -112,27 +112,6 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
>  }
>  EXPORT_SYMBOL(rproc_elf_sanity_check);
>  
> -/**
> - * rproc_elf_sanity_check() - Sanity Check ELF32 firmware image
> - * @rproc: the remote processor handle
> - * @fw: the ELF32 firmware image
> - *
> - * Make sure this fw image is sane.
> - */
> -int rproc_elf32_sanity_check(struct rproc *rproc, const struct firmware *fw)
> -{
> -	int ret = rproc_elf_sanity_check(rproc, fw);
> -
> -	if (ret)
> -		return ret;
> -
> -	if (fw_elf_get_class(fw) == ELFCLASS32)
> -		return 0;
> -
> -	return -EINVAL;
> -}
> -EXPORT_SYMBOL(rproc_elf32_sanity_check);
> -
>  /**
>   * rproc_elf_get_boot_addr() - Get rproc's boot address.
>   * @rproc: the remote processor handle
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index b389dc79da81..31994715fd43 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -54,7 +54,6 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len);
>  phys_addr_t rproc_va_to_pa(void *cpu_addr);
>  int rproc_trigger_recovery(struct rproc *rproc);
>  
> -int rproc_elf32_sanity_check(struct rproc *rproc, const struct firmware *fw);
>  int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw);
>  u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw);
>  int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw);
> diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
> index a6cbfa452764..a3268d95a50e 100644
> --- a/drivers/remoteproc/st_remoteproc.c
> +++ b/drivers/remoteproc/st_remoteproc.c
> @@ -233,7 +233,7 @@ static const struct rproc_ops st_rproc_ops = {
>  	.parse_fw		= st_rproc_parse_fw,
>  	.load			= rproc_elf_load_segments,
>  	.find_loaded_rsc_table	= rproc_elf_find_loaded_rsc_table,
> -	.sanity_check		= rproc_elf32_sanity_check,
> +	.sanity_check		= rproc_elf_sanity_check,
>  	.get_boot_addr		= rproc_elf_get_boot_addr,
>  };
>  
> diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
> index 3cca8b65a8db..09bcb4d8b9e0 100644
> --- a/drivers/remoteproc/st_slim_rproc.c
> +++ b/drivers/remoteproc/st_slim_rproc.c
> @@ -203,7 +203,7 @@ static const struct rproc_ops slim_rproc_ops = {
>  	.da_to_va       = slim_rproc_da_to_va,
>  	.get_boot_addr	= rproc_elf_get_boot_addr,
>  	.load		= rproc_elf_load_segments,
> -	.sanity_check	= rproc_elf32_sanity_check,
> +	.sanity_check	= rproc_elf_sanity_check,
>  };
>  
>  /**
> diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
> index 6a66dbf2df40..2e07a95439c8 100644
> --- a/drivers/remoteproc/stm32_rproc.c
> +++ b/drivers/remoteproc/stm32_rproc.c
> @@ -505,7 +505,7 @@ static struct rproc_ops st_rproc_ops = {
>  	.load		= rproc_elf_load_segments,
>  	.parse_fw	= stm32_rproc_parse_fw,
>  	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
> -	.sanity_check	= rproc_elf32_sanity_check,
> +	.sanity_check	= rproc_elf_sanity_check,
>  	.get_boot_addr	= rproc_elf_get_boot_addr,
>  };
>  
> -- 
> 2.17.1
>