[PATCH] lib/utils: fdt: Update FDT expand size to 1024 for reserved memory node

[Anup Patel]

> -----Original Message-----
> From: opensbi <opensbi-bounces at lists.infradead.org> On Behalf Of Atish
> Patra
> Sent: 25 June 2020 23:00
> To: Bin Meng <bmeng.cn at gmail.com>
> Cc: Atish Patra <Atish.Patra at wdc.com>; Bin Meng
> <bin.meng at windriver.com>; OpenSBI <opensbi at lists.infradead.org>
> Subject: Re: [PATCH] lib/utils: fdt: Update FDT expand size to 1024 for
> reserved memory node
> 
> On Thu, Jun 25, 2020 at 2:36 AM Bin Meng <bmeng.cn at gmail.com> wrote:
> >
> > From: Bin Meng <bin.meng at windriver.com>
> >
> > Currently 256 bytes is used for the FDT expand size when fixing up
> > reserved memory node. Increase it to 1024 bytes with an estimated size
> > of 64 bytes per PMP memory region by 16 regions in total.
> >
> > Signed-off-by: Bin Meng <bin.meng at windriver.com>
> > ---
> >
> >  lib/utils/fdt/fdt_fixup.c | 10 ++++++++--
> >  1 file changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/lib/utils/fdt/fdt_fixup.c b/lib/utils/fdt/fdt_fixup.c
> > index adf1be3..a3bccae 100644
> > --- a/lib/utils/fdt/fdt_fixup.c
> > +++ b/lib/utils/fdt/fdt_fixup.c
> > @@ -151,8 +151,14 @@ int fdt_reserved_memory_fixup(void *fdt)
> >         int na = fdt_address_cells(fdt, 0);
> >         int ns = fdt_size_cells(fdt, 0);
> >
> > -       /* expand the device tree to accommodate new node */
> > -       err  = fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + 256);
> > +       /*
> > +        * Expand the device tree to accommodate new node
> > +        * by the following estimated size:
> > +        *
> > +        * Each PMP memory region entry occupies 64 bytes.
> > +        * With 16 PMP memory regions we need 64 * 16 = 1024 bytes.
> > +        */
> > +       err = fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + 1024);
> >         if (err < 0)
> >                 return err;
> >
> > --
> > 2.7.4
> >
> >
> > --
> > opensbi mailing list
> > opensbi at lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/opensbi
> 
> 
> Reviewed-by: Atish Patra <atish.patra at wdc.com>

Applied this patch to the riscv/opensbi repo.

Thanks,
Anup