Kexec_load syscall in ARM checks that machine-specific code has the smp_ops.cpu_kill() before loading kernel image. This patch adds the cpu_kill(), as a result, kexec reboot and kernel crash dump become available in mach-socfpga.
Signed-off-by: Hiraku Toyooka <[email protected]> Cc: Dinh Nguyen <[email protected]> Cc: Russell King <[email protected]> Cc: [email protected] Cc: [email protected] --- arch/arm/mach-socfpga/platsmp.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm/mach-socfpga/platsmp.c b/arch/arm/mach-socfpga/platsmp.c index c64d89b..a8f0f84 100644 --- a/arch/arm/mach-socfpga/platsmp.c +++ b/arch/arm/mach-socfpga/platsmp.c @@ -95,11 +95,22 @@ static void socfpga_cpu_die(unsigned int cpu) cpu_do_idle(); } +/* + * We need a dummy function so that platform_can_cpu_hotplug() knows + * we support CPU hotplug. However, the function does not need to do + * anything, because CPUs going offline just do WFI. + */ +static int socfpga_cpu_kill(unsigned int cpu) +{ + return 1; +} + struct smp_operations socfpga_smp_ops __initdata = { .smp_init_cpus = socfpga_smp_init_cpus, .smp_prepare_cpus = socfpga_smp_prepare_cpus, .smp_boot_secondary = socfpga_boot_secondary, #ifdef CONFIG_HOTPLUG_CPU .cpu_die = socfpga_cpu_die, + .cpu_kill = socfpga_cpu_kill, #endif }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
