Re: [PATCH 2/3] arm64: dts: r8a7795: Add Cortex-A57 CPU cores

[Simon Horman <horms@verge.net.au>]

Hi Dirk,

On Tue, Dec 15, 2015 at 09:48:46AM +0100, Dirk Behme wrote:
> On 15.12.2015 09:38, Magnus Damm wrote:
> >Hi Simon,
> >
> >On Sat, Dec 12, 2015 at 8:07 AM, Simon Horman <horms@verge.net.au> wrote:
> >>On Fri, Dec 04, 2015 at 02:38:52PM +0100, Dirk Behme wrote:
> >>>From: Gaku Inami <gaku.inami.xw@bp.renesas.com>
> >>>
> >>>Add Cortex-A57 CPU cores to r8a7795 SoC for a total of 4 x Cortex-A57.
> >>>
> >>>Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
> >>>Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
> >>>Sigend-off-by: Dirk Behme <dirk.behme@gmail.com>
> >>
> >>Thanks, I have queued this up for v4.5.
> >
> >Thanks. May I ask if CPU hotplug is known to work?
> 
> 
> I didn't test that.

As a follow-up I am wondering if you subsequently observed CPU hotplug
working. My recent testing on v4.5 indicates that it isn't working in my
environment. It would be quite valuable to know if it has ever been known
to work.

> >Also, which version
> >of the boot loader stack is required?
> 
> 
> I've the U-Boot / boot loader stack from BSP v3.0.2 on the board. I haven't
> tested v3.0.3, yet.

For reference my environment is as follows:


    NOTICE:  BL2: R-Car H3 Loader Rev.1.0.1
    NOTICE:  BL2: DDR1600(rev.0.10)
    NOTICE:  BL2: DRAM Split is 4ch
    NOTICE:  BL2: QoS is Gfx Oriented(rev.0.24A)
    NOTICE:  BL2: v1.1(release):41099f4
    NOTICE:  BL2: Built : 11:47:26, Nov 19 2015
    NOTICE:  BL2: Normal boot
    NOTICE:  BL2: memdrv_block_read dst=0xe630e0b0 src=0x8180000 len=36(0x24)
    NOTICE:  BL2: memdrv_block_read dst=0x43f00000 src=0x8180400 len=3072(0xc00)
    NOTICE:  BL2: memdrv_block_read dst=0x44000000 src=0x81c0000 len=65536(0x10000)
    NOTICE:  BL2: memdrv_block_read dst=0x44100000 src=0x8200000 len=524288(0x80000)
    NOTICE:  BL2: memdrv_block_read dst=0x49000000 src=0x8640000 len=1048576(0x100000)

    U-Boot 2015.04 (Nov 19 2015 - 11:47:49)

    CPU: Renesas Electronics CPU rev 1.0
    Board: Salvator-X
    DRAM:  896 MiB
    MMC:   sh-sdhi: 0, sh-sdhi: 1, sh-sdhi: 2
    In:    serial
    Out:   serial
    Err:   serial
    Net:   ravb