Running kexec on mx6

[linux@arm.linux.org.uk (Russell King - ARM Linux)]

On Fri, Jun 12, 2015 at 10:53:13AM -0300, Fabio Estevam wrote:
> On Thu, Jun 11, 2015 at 9:08 PM, Fabio Estevam <festevam@gmail.com> wrote:
> > Hi,
> >
> > I am trying to load a kernel and dtb via kexec on a mx6solo wandboard
> > board running 4.1-rc7:
> >
> > root at wandboard-solo:~# kexec -d -l /mnt/zImage --dtb /mnt/imx6dl-wandboard.dtb -
> > -command-line="console=ttymxc0,115200 root=/dev/mmcblk2p2 rootwait rw"
> > my_load:667: do
> > kernel: 0x75da4008 kernel_size: 0x5be000
> > kexec_load: entry = 0x10008000 flags = 0x280000
> > nr_segments = 2
> > segment[0].buf   = 0x75da4008
> > segment[0].bufsz = 0x5be000
> > segment[0].mem   = 0x10008000
> > segment[0].memsz = 0x5be000
> > segment[1].buf   = 0x1ce9008
> > segment[1].bufsz = 0x6c87
> > segment[1].mem   = 0x116f9000
> > segment[1].memsz = 0x7000
> > root at wandboard-solo:~# kexec -e
> > [   62.581795] kexec: Starting new kernel
> > [   62.585570] Disabling non-boot CPUs ...
> > [   62.589485] Bye!
> >
> > And then nothing comes out.
> 
> If I use a 4.1-rc7 to be loaded via kexec then I get the
> "Uncompressing Linux... done, booting the kernel" message.
> 
> Initially I was loading a 3.10 kernel from a running 4.1-rc7.
> 
> Now I see:
> 
> root at wandboard-solo:~# kexec -d -l /tmp/zImage --dtb /tmp/imx6dl-wandboard.dtb -
> -command-line="console=ttymxc0,115200 root=/dev/mmcblk0p2 rootwait rw"
> my_load:667: do
> kernel: 0x75d95008 kernel_size: 0x5c99d8
> kexec_load: entry = 0x10008000 flags = 0x280000
> nr_segments = 2
> segment[0].buf   = 0x75d95008
> segment[0].bufsz = 0x5c99d8
> segment[0].mem   = 0x10008000
> segment[0].memsz = 0x5ca000
> segment[1].buf   = 0x1f4008
> segment[1].bufsz = 0x6d63
> segment[1].mem   = 0x11728000
> segment[1].memsz = 0x7000
> root at wandboard-solo:~# kexec -e
> [   27.591555] kexec: Starting new kernel
> [   27.595331] Disabling non-boot CPUs ...
> [   27.599250] Bye!
> Uncompressing Linux... done, booting the kernel.

Has it ever worked, or is this a regression?

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