Re: [PATCH v2] remoteproc: remove rproc_elf32_sanity_check

[Suman Anna]

On 3/31/20 3:33 AM, 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@xxxxxxxxx>

Acked-by: Suman Anna <s-anna@xxxxxx>

regards
Suman

> ---
> Changes from v1 -> v2:
>  - Remove possibity to override sanity_check operation
> 
>  drivers/remoteproc/remoteproc_core.c       |  3 +--
>  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(+), 27 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index a9ac1d01e09b..191560048c1a 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -2068,8 +2068,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
>  		rproc->ops->load = rproc_elf_load_segments;
>  		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,
>  };
>  
>