lkml.org 
[lkml]   [2018]   [Dec]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH v16 06/16] lib: fdt: add a helper function for handling memory range property
    On Tue, Dec 11, 2018 at 10:09:07AM +0000, James Morse wrote:
    > Hi Akashi,
    >
    > On 11/12/2018 06:17, AKASHI, Takahiro wrote:
    > > On Fri, Dec 07, 2018 at 10:12:47AM +0000, James Morse wrote:
    > >> On 06/12/2018 15:54, Will Deacon wrote:
    > >>> On Thu, Dec 06, 2018 at 08:47:04AM -0600, Rob Herring wrote:
    > >>>> On Wed, Nov 14, 2018 at 11:52 PM AKASHI Takahiro
    > >>>> <takahiro.akashi@linaro.org> wrote:
    > >>>>>
    > >>>>> Added function, fdt_setprop_reg(), will be used later to handle
    > >>>>> kexec-specific property in arm64's kexec_file implementation.
    > >>>>> It will possibly be merged into libfdt in the future.
    > >>>>
    > >>>> You generally can't modify libfdt files. Any changes will be blown
    > >>>> away with the next dtc sync (there's one in -next now). Though here
    > >>>> you are creating a new location with fdt code. lib/ is just a shim to
    > >>>> the actual libfdt code. Don't put any implementation there. You can
    > >>>> add this to drivers/of/fdt_address.c for the short term, but it still
    > >>>> needs to go upstream.
    > >>>>
    > >>>> Otherwise, the implementation looks fine to me.
    > >>>
    > >>> I agree, but I don't think there's a real need for us to hack
    > >>> drivers/of/fdt_address.c in the meantime -- let's just target upstream
    > >>> and not carry this in the kernel.
    > >>>
    > >>> Akashi -- for now, I'll drop the kdump parts of this series which rely
    > >>> on this helper. The majority of the series is actually independent and
    > >>> can go in as-is.
    > >>>
    > >>> I've pushed out a kexec branch to the arm64 tree for you to take a look
    > >>> at:
    > >>>
    > >>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=kexec
    > >>
    > >> I gave this a quick spin. Without the elfcorehdr/usable-memory-range arm64 needs
    > >> to explicitly forbid kdump via kexec_file_load. (like powerpc does already).
    > >
    > > Thank you for pointing this out.
    > >
    > >> Without this kdump works, but the second kernel overwrites the first as those DT
    > >> properties are missing.
    > >>
    > >> I'll post a patch momentarily,
    > >
    > > Fine, but anyhow I'm going to submit a new version (*without* kdump),
    > > I will fix the issue along with others.
    >
    > I had a quick look at the arm64 for-next/core branch. Will has queued the
    > non-kdump parts of this series.
    >
    > If you have changes, they need to be against the arm64 tree.

    Okay!

    -Takahiro Akashi

    >
    > Thanks,
    >
    > James

    \
     
     \ /
      Last update: 2018-12-12 02:26    [W:3.173 / U:0.036 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site