On Wed, Feb 25, 2015 at 05:21:05PM +0200, Aaro Koskinen wrote:
> Pass fw arguments on kexec to the new kernel.
>
> Tested with MIPS64 QEMU. Without the patch the new kernel will default to
> (likely) incorrect default memory and console setup, making kexec pretty
> much useless.
>
> Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxxxxx>
> ---
> arch/mips/mti-malta/malta-reset.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/arch/mips/mti-malta/malta-reset.c b/arch/mips/mti-malta/malta-reset.c
> index 2fd2cc2..f218ba8 100644
> --- a/arch/mips/mti-malta/malta-reset.c
> +++ b/arch/mips/mti-malta/malta-reset.c
> @@ -8,8 +8,10 @@
> */
> #include <linux/io.h>
> #include <linux/pm.h>
> +#include <linux/kexec.h>
>
> #include <asm/reboot.h>
> +#include <asm/bootinfo.h>
> #include <asm/mach-malta/malta-pm.h>
>
> #define SOFTRES_REG 0x1f000500
> @@ -36,8 +38,19 @@ static void mips_machine_power_off(void)
> mips_machine_restart(NULL);
> }
>
> +static int mips_kexec_prepare(struct kimage *image)
> +{
> + kexec_args[0] = fw_arg0;
> + kexec_args[1] = fw_arg1;
> + kexec_args[2] = fw_arg2;
> + kexec_args[3] = fw_arg3;
> +
> + return 0;
> +}
This makes arguments coming from the firmware non-overridable default?
Ralf
