linux-kernel - Re: [PATCH v5 3/8] remoteproc: Use u64 type for boot

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Date:   Mon, 9 Mar 2020 13:52:47 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Clement Leger <cleger@...ray.eu>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-remoteproc@...r.kernel.org,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Andy Gross <agross@...nel.org>,
        Patrice Chotard <patrice.chotard@...com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org,
        Arnaud Pouliquen <arnaud.pouliquen@...com>,
        Loic PALLARDY <loic.pallardy@...com>, s-anna <s-anna@...com>
Subject: Re: [PATCH v5 3/8] remoteproc: Use u64 type for boot_addr

On Mon, Mar 02, 2020 at 10:38:57AM +0100, Clement Leger wrote:
> elf64 entry is defined as a u64. Since boot_addr is used to store the
> elf entry point, change boot_addr type to u64 to support both elf32
> and elf64. In the same time, fix users that were using this variable.
> 
> Signed-off-by: Clement Leger <cleger@...ray.eu>
> ---
>  drivers/remoteproc/remoteproc_elf_loader.c | 2 +-
>  drivers/remoteproc/remoteproc_internal.h   | 2 +-
>  drivers/remoteproc/st_remoteproc.c         | 2 +-
>  include/linux/remoteproc.h                 | 4 ++--
>  4 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
> index 606aae166eba..c2a9783cfb9a 100644
> --- a/drivers/remoteproc/remoteproc_elf_loader.c
> +++ b/drivers/remoteproc/remoteproc_elf_loader.c
> @@ -102,7 +102,7 @@ EXPORT_SYMBOL(rproc_elf_sanity_check);
>   * Note that the boot address is not a configurable property of all remote
>   * processors. Some will always boot at a specific hard-coded address.
>   */
> -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
> +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
>  {
>  	struct elf32_hdr *ehdr  = (struct elf32_hdr *)fw->data;
>  
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index 58580210575c..0deae5f237b8 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -55,7 +55,7 @@ phys_addr_t rproc_va_to_pa(void *cpu_addr);
>  int rproc_trigger_recovery(struct rproc *rproc);
>  
>  int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw);
> -u32 rproc_elf_get_boot_addr(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);
>  int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw);
>  struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,

The return type of function rproc_get_boot_addr() should also be changed from
u32 to u64.  Or perhaps this is intentional to make sure rproc->bootaddr never
occupies more than 32bit?

> diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
> index ee13d23b43a9..a3268d95a50e 100644
> --- a/drivers/remoteproc/st_remoteproc.c
> +++ b/drivers/remoteproc/st_remoteproc.c
> @@ -190,7 +190,7 @@ static int st_rproc_start(struct rproc *rproc)
>  		}
>  	}
>  
> -	dev_info(&rproc->dev, "Started from 0x%x\n", rproc->bootaddr);
> +	dev_info(&rproc->dev, "Started from 0x%llx\n", rproc->bootaddr);
>  
>  	return 0;
>  
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index bee559330204..1683d6c386a6 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -382,7 +382,7 @@ struct rproc_ops {
>  				struct rproc *rproc, const struct firmware *fw);
>  	int (*load)(struct rproc *rproc, const struct firmware *fw);
>  	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
> -	u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
> +	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>  };
>  
>  /**
> @@ -498,7 +498,7 @@ struct rproc {
>  	int num_traces;
>  	struct list_head carveouts;
>  	struct list_head mappings;
> -	u32 bootaddr;
> +	u64 bootaddr;
>  	struct list_head rvdevs;
>  	struct list_head subdevs;
>  	struct idr notifyids;
> -- 
> 2.15.0.276.g89ea799
>