Re: [PATCH] ARM: tegra: add kexec support to defconfig

[Thierry Reding <thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org>]

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On Thu, Jan 03, 2013 at 02:45:02PM -0700, Stephen Warren wrote:
> On 01/03/2013 02:29 PM, Thierry Reding wrote:
> > On Thu, Jan 03, 2013 at 02:18:27PM -0700, Stephen Warren wrote:
> >> On 01/03/2013 02:05 PM, Thierry Reding wrote:
> >>> On Wed, Jan 02, 2013 at 02:12:21PM -0700, Stephen Warren
> >>> wrote:
> >>>> From: Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> >>>> 
> >>>> Signed-off-by: Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> --- 
> >>>> arch/arm/configs/tegra_defconfig |    1 + 1 file changed, 1 
> >>>> insertion(+)
> >>>> 
> >>>> diff --git a/arch/arm/configs/tegra_defconfig 
> >>>> b/arch/arm/configs/tegra_defconfig index 742dc41..e621603
> >>>> 100644 --- a/arch/arm/configs/tegra_defconfig +++ 
> >>>> b/arch/arm/configs/tegra_defconfig @@ -34,6 +34,7 @@ 
> >>>> CONFIG_AEABI=y CONFIG_HIGHMEM=y CONFIG_ZBOOT_ROM_TEXT=0x0 
> >>>> CONFIG_ZBOOT_ROM_BSS=0x0 +CONFIG_KEXEC=y CONFIG_CPU_FREQ=y 
> >>>> CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y CONFIG_CPU_IDLE=y
> >>> 
> >>> Interesting. What do you plan to use this for? kdump?
> >> 
> >> I plan to burn a kernel (and a small stub, and a DTB) into flash 
> >> instead of U-Boot, and hence not have to rely on any bootloader.
> > 
> > Why does that require kexec support?
> 
> Because I'd be using that kernel plus an initrd to download the "real"
> kernel over e.g. TFTP and kexec it.

Right, that makes sense. Thanks for explaining.

Thierry

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