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Date: Tue, 10 Mar 2020 13:18:00 -0600
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Clément Leger <cleger@...rayinc.com>
Cc: Bjorn Andersson <bjorn.andersson@...aro.org>,
Ohad Ben-Cohen <ohad@...ery.com>,
Jonathan Corbet <corbet@....net>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
linux-remoteproc <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 <linux-doc@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-arm-msm <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 5/8] remoteproc: Rename rproc_elf_sanity_check for elf32
On Tue, 10 Mar 2020 at 09:38, Clément Leger <cleger@...rayinc.com> wrote:
>
> Hi Mathieu,
>
> ----- On 10 Mar, 2020, at 16:20, Mathieu Poirier mathieu.poirier@...aro.org wrote:
>
> > On Mon, Mar 09, 2020 at 05:00:05PM -0700, Bjorn Andersson wrote:
> >> On Tue 03 Mar 00:02 PST 2020, Cl?ment Leger wrote:
> >>
> >> > Hi Bjorn,
> >> >
> >> > ----- On 3 Mar, 2020, at 00:13, Bjorn Andersson bjorn.andersson@...aro.org
> >> > wrote:
> >> >
> >> > > On Mon 02 Mar 01:38 PST 2020, Clement Leger wrote:
> >> > >
> >> > >> Since this function will be modified to support both elf32 and elf64,
> >> > >> rename the existing one to elf32 (which is the only supported format
> >> > >> at the moment). This will allow not to introduce possible side effect
> >> > >> when adding elf64 support (ie: all backends will still support only
> >> > >> elf32 if not requested explicitely using rproc_elf_sanity_check).
> >> > >>
> >> > >
> >> > > Is there a reason for preventing ELF64 binaries be loaded?
> >> >
> >> > I decided to go this way to let driver maintainer decide if they want
> >> > to support elf64 to avoid problems with 64bits addresses/sizes which do
> >> > not fit in their native type (size_t for instance). This is probably
> >> > not going to happen and there are additionnal checks before calling
> >> > rproc_da_to_va. And addresses should be filtered by rproc_da_to_va.
> >> > So, actually it seems there is no reason to forbid supporting elf32/64
> >> > for all drivers.
> >> >
> >>
> >> I was hoping to hear some additional feedback on this from others.
> >
> > I didn't follow up on this one because I agreed with your assesment and didn't
> > think it was needed.
> >
> > Simply put I would rather see rproc_elf_sanity_check() gain support for elf64
> > and let the platform code decide what to do with format they don't support
> > rather than spinning a new function.
> >
> >>
> >> I've merge the patch as is, but think it would be nice to clean this up
> >> and just have the driver ignore if fed a 32 or 64-elf.
> >
> > It would be really nice to see this cleaned up in time for the coming merge
> > window...
>
> I could have sent a V7, but Bjorn was faster than my comment ;)
> Bjorn, Is there any way to revert that or it's already pushed ?
> I already have a clean V7.
Just send another patchset that applies on top of this one.
>
> Thanks,
>
> Clément
>
> >
> > Thanks
> > Mathieu
> >
> >>
> >> Regards,
> >> Bjorn
> >>
> >> > Regards,
> >> >
> >> > Clément
> >> >
> >> > >
> >> > > Regards,
> >> > > Bjorn
> >> > >
> >> > >> Signed-off-by: Clement Leger <cleger@...ray.eu>
> >> > >> ---
> >> > >> drivers/remoteproc/remoteproc_core.c | 2 +-
> >> > >> drivers/remoteproc/remoteproc_elf_loader.c | 6 +++---
> >> > >> drivers/remoteproc/remoteproc_internal.h | 2 +-
> >> > >> drivers/remoteproc/st_remoteproc.c | 2 +-
> >> > >> drivers/remoteproc/st_slim_rproc.c | 2 +-
> >> > >> drivers/remoteproc/stm32_rproc.c | 2 +-
> >> > >> 6 files changed, 8 insertions(+), 8 deletions(-)
> >> > >>
> >> > >> diff --git a/drivers/remoteproc/remoteproc_core.c
> >> > >> b/drivers/remoteproc/remoteproc_core.c
> >> > >> index 4bfaf4a3c4a3..99f0b796fbc7 100644
> >> > >> --- a/drivers/remoteproc/remoteproc_core.c
> >> > >> +++ b/drivers/remoteproc/remoteproc_core.c
> >> > >> @@ -2055,7 +2055,7 @@ 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;
> >> > >> - rproc->ops->sanity_check = rproc_elf_sanity_check;
> >> > >> + rproc->ops->sanity_check = rproc_elf32_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 c2a9783cfb9a..5a67745f2638 100644
> >> > >> --- a/drivers/remoteproc/remoteproc_elf_loader.c
> >> > >> +++ b/drivers/remoteproc/remoteproc_elf_loader.c
> >> > >> @@ -25,13 +25,13 @@
> >> > >> #include "remoteproc_internal.h"
> >> > >>
> >> > >> /**
> >> > >> - * rproc_elf_sanity_check() - Sanity Check ELF firmware image
> >> > >> + * rproc_elf_sanity_check() - Sanity Check ELF32 firmware image
> >> > >> * @rproc: the remote processor handle
> >> > >> * @fw: the ELF firmware image
> >> > >> *
> >> > >> * Make sure this fw image is sane.
> >> > >> */
> >> > >> -int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
> >> > >> +int rproc_elf32_sanity_check(struct rproc *rproc, const struct firmware *fw)
> >> > >> {
> >> > >> const char *name = rproc->firmware;
> >> > >> struct device *dev = &rproc->dev;
> >> > >> @@ -89,7 +89,7 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct
> >> > >> firmware *fw)
> >> > >>
> >> > >> return 0;
> >> > >> }
> >> > >> -EXPORT_SYMBOL(rproc_elf_sanity_check);
> >> > >> +EXPORT_SYMBOL(rproc_elf32_sanity_check);
> >> > >>
> >> > >> /**
> >> > >> * rproc_elf_get_boot_addr() - Get rproc's boot address.
> >> > >> diff --git a/drivers/remoteproc/remoteproc_internal.h
> >> > >> b/drivers/remoteproc/remoteproc_internal.h
> >> > >> index 0deae5f237b8..28639c588d58 100644
> >> > >> --- a/drivers/remoteproc/remoteproc_internal.h
> >> > >> +++ b/drivers/remoteproc/remoteproc_internal.h
> >> > >> @@ -54,7 +54,7 @@ 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_elf_sanity_check(struct rproc *rproc, const struct firmware *fw);
> >> > >> +int rproc_elf32_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);
> >> > >> int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw);
> >> > >> diff --git a/drivers/remoteproc/st_remoteproc.c
> >> > >> b/drivers/remoteproc/st_remoteproc.c
> >> > >> index a3268d95a50e..a6cbfa452764 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_elf_sanity_check,
> >> > >> + .sanity_check = rproc_elf32_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 09bcb4d8b9e0..3cca8b65a8db 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_elf_sanity_check,
> >> > >> + .sanity_check = rproc_elf32_sanity_check,
> >> > >> };
> >> > >>
> >> > >> /**
> >> > >> diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
> >> > >> index a18f88044111..9a8b5f5e2572 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_elf_sanity_check,
> >> > >> + .sanity_check = rproc_elf32_sanity_check,
> >> > >> .get_boot_addr = rproc_elf_get_boot_addr,
> >> > >> };
> >> > >>
> >> > >> --
> > > > >> 2.15.0.276.g89ea799
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