linux-kernel - Re: [PATCH 1/2] remoteproc: add rproc_coredump_set_elf

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Date:   Sun, 19 Apr 2020 22:57:46 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Cl?ment Leger <cleger@...rayinc.com>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linux-remoteproc <linux-remoteproc@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-stm32 <linux-stm32@...md-mailman.stormreply.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] remoteproc: add rproc_coredump_set_elf_info

On Fri 17 Apr 12:43 PDT 2020, Cl?ment Leger wrote:

> ----- On 17 Apr, 2020, at 21:38, Mathieu Poirier mathieu.poirier@...aro.org wrote:
> 
> > On Fri, Apr 10, 2020 at 12:24:32PM +0200, Clement Leger wrote:
> >> This function allows drivers to correctly setup the coredump output
> >> elf information.
> >> 
> >> Signed-off-by: Clement Leger <cleger@...ray.eu>
> >> ---
> >>  drivers/remoteproc/remoteproc_core.c       | 32 ++++++++++++++++++++--
> >>  drivers/remoteproc/remoteproc_elf_loader.c |  3 --
> >>  include/linux/remoteproc.h                 |  2 ++
> >>  3 files changed, 32 insertions(+), 5 deletions(-)
> >> 
> >> diff --git a/drivers/remoteproc/remoteproc_core.c
> >> b/drivers/remoteproc/remoteproc_core.c
> >> index a9ac1d01e09b..382443bab583 100644
> >> --- a/drivers/remoteproc/remoteproc_core.c
> >> +++ b/drivers/remoteproc/remoteproc_core.c
> >> @@ -1562,6 +1562,28 @@ int rproc_coredump_add_custom_segment(struct rproc
> >> *rproc,
> >>  }
> >>  EXPORT_SYMBOL(rproc_coredump_add_custom_segment);
> >>  
> >> +/**
> >> + * rproc_coredump_set_elf_info() - set coredump elf information
> >> + * @rproc:	handle of a remote processor
> >> + * @class:	elf class for coredump elf file
> >> + * @size:	elf machine for coredump elf file
> 
> I just noticed that there is a typo, this should be "machine" and not "size".
> Let me know if you'll fix it when applying.
> 

Thanks for noticing, I fixed this up and applied the two patches.

Thanks,
Bjorn

> Thanks,
> 
> Clément
> 
> >> + *
> >> + * Set elf information which will be used for coredump elf file.
> >> + *
> >> + * Return: 0 on success, negative errno on error.
> >> + */
> >> +int rproc_coredump_set_elf_info(struct rproc *rproc, u8 class, u16 machine)
> >> +{
> >> +	if (class != ELFCLASS64 && class != ELFCLASS32)
> >> +		return -EINVAL;
> >> +
> >> +	rproc->elf_class = class;
> >> +	rproc->elf_machine = machine;
> >> +
> >> +	return 0;
> >> +}
> >> +EXPORT_SYMBOL(rproc_coredump_set_elf_info);
> >> +
> >>  /**
> >>   * rproc_coredump() - perform coredump
> >>   * @rproc:	rproc handle
> >> @@ -1584,6 +1606,11 @@ static void rproc_coredump(struct rproc *rproc)
> >>  	if (list_empty(&rproc->dump_segments))
> >>  		return;
> >>  
> >> +	if (class == ELFCLASSNONE) {
> >> +		dev_err(&rproc->dev, "Elf class is not set\n");
> >> +		return;
> >> +	}
> >> +
> >>  	data_size = elf_size_of_hdr(class);
> >>  	list_for_each_entry(segment, &rproc->dump_segments, node) {
> >>  		data_size += elf_size_of_phdr(class) + segment->size;
> >> @@ -1602,7 +1629,7 @@ static void rproc_coredump(struct rproc *rproc)
> >>  	elf_hdr_init_ident(ehdr, class);
> >>  
> >>  	elf_hdr_set_e_type(class, ehdr, ET_CORE);
> >> -	elf_hdr_set_e_machine(class, ehdr, EM_NONE);
> >> +	elf_hdr_set_e_machine(class, ehdr, rproc->elf_machine);
> >>  	elf_hdr_set_e_version(class, ehdr, EV_CURRENT);
> >>  	elf_hdr_set_e_entry(class, ehdr, rproc->bootaddr);
> >>  	elf_hdr_set_e_phoff(class, ehdr, elf_size_of_hdr(class));
> >> @@ -2043,7 +2070,8 @@ struct rproc *rproc_alloc(struct device *dev, const char
> >> *name,
> >>  	rproc->name = name;
> >>  	rproc->priv = &rproc[1];
> >>  	rproc->auto_boot = true;
> >> -	rproc->elf_class = ELFCLASS32;
> >> +	rproc->elf_class = ELFCLASSNONE;
> >> +	rproc->elf_machine = EM_NONE;
> >>  
> >>  	device_initialize(&rproc->dev);
> >>  	rproc->dev.parent = dev;
> >> diff --git a/drivers/remoteproc/remoteproc_elf_loader.c
> >> b/drivers/remoteproc/remoteproc_elf_loader.c
> >> index 16e2c496fd45..4869fb7d8fe4 100644
> >> --- a/drivers/remoteproc/remoteproc_elf_loader.c
> >> +++ b/drivers/remoteproc/remoteproc_elf_loader.c
> >> @@ -248,9 +248,6 @@ int rproc_elf_load_segments(struct rproc *rproc, const
> >> struct firmware *fw)
> >>  			memset(ptr + filesz, 0, memsz - filesz);
> >>  	}
> >>  
> >> -	if (ret == 0)
> >> -		rproc->elf_class = class;
> >> -
> >>  	return ret;
> >>  }
> >>  EXPORT_SYMBOL(rproc_elf_load_segments);
> >> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> >> index ed127b2d35ca..d67eb5a40476 100644
> >> --- a/include/linux/remoteproc.h
> >> +++ b/include/linux/remoteproc.h
> >> @@ -515,6 +515,7 @@ struct rproc {
> >>  	struct list_head dump_segments;
> >>  	int nb_vdev;
> >>  	u8 elf_class;
> >> +	u16 elf_machine;
> >>  };
> > 
> > Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> > 
> >>  
> >>  /**
> >> @@ -619,6 +620,7 @@ int rproc_coredump_add_custom_segment(struct rproc *rproc,
> >>  						     struct rproc_dump_segment *segment,
> >>  						     void *dest),
> >>  				      void *priv);
> >> +int rproc_coredump_set_elf_info(struct rproc *rproc, u8 class, u16 machine);
> >>  
> >>  static inline struct rproc_vdev *vdev_to_rvdev(struct virtio_device *vdev)
> >>  {
> >> --
> >> 2.17.1