[SLOF] [Slof] [PATCH 4/5] cas: Increase FDT buffer size to accomodate larger ibm, cas node properties

[Alexey Kardashevskiy]

On 07/06/2015 09:02 PM, Nikunj A Dadhania wrote:
> From: Bharata B Rao <bharata at linux.vnet.ibm.com>
>
> When QEMU starts with a higher value of maxmem, ibm,dynamic-memory
> property under ibm,client-architecture-support device tree node can
> consume a large FDT buffer space.
>
> Accommodate this by increasing the FDT buffer size passed from SLOF
> to QEMU to 128KB from the current 32KB.
>
> Tested with QEMU options:
> "-m 2G,slots=16,maxmem=1024G -smp 255 -cpu host,compat=power7"
> on a POWER8 host with /sys/devices/system/cpu/subcores_per_core=4
>
> Signed-off-by: Bharata B Rao <bharata at linux.vnet.ibm.com>
> Cc: Nikunj A Dadhania <nikunj at linux.vnet.ibm.com>
> Signed-off-by: Nikunj A Dadhania <nikunj at linux.vnet.ibm.com>
> ---
>   slof/fs/archsupport.fs | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/slof/fs/archsupport.fs b/slof/fs/archsupport.fs
> index cc46687..f564ab4 100644
> --- a/slof/fs/archsupport.fs
> +++ b/slof/fs/archsupport.fs
> @@ -10,9 +10,9 @@
>   \ *     IBM Corporation - initial implementation
>   \ ****************************************************************************/
>
> -\ Qemu supports max 256cpus, 32K will be able to accomodate the fdt changes if
> -\ needed.
> -8000 VALUE size
> +\ 128KB FDT buffer size is enough to accommodate 255 CPU cores and 1TB of
> +\ maxmem specification.
> +20000 VALUE size
>   : ibm,client-architecture-support         ( vec -- err? )
>       \ Store require parameters in nvram
>       \ to come back to right boot device
>

I pushed just this one to github, waiting for others.




-- 
Alexey