MIPS: kexec: Make a framework for both jumping and halting on nonboot CPUs
The existing implementation lets machine_kexec() CPU jump to reboot code
buffer, whereas other CPUs to relocated_kexec_smp_wait. The natural way to
bring up an SMP new kernel would be to let CPU0 do it while others being
halted. For those failing to do so, fall back to the jumping method.
Signed-off-by: Dengcheng Zhu <dzhu@wavecomp.com>
[paul.burton@mips.com: Guard kexec_nonboot_cpu_jump with CONFIG_SMP]
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20570/
Cc: pburton@wavecomp.com
Cc: ralf@linux-mips.org
Cc: linux-mips@linux-mips.org
Cc: rachel.mozes@intel.com
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
index 75e7c86..39f2a2e 100644
--- a/arch/mips/cavium-octeon/smp.c
+++ b/arch/mips/cavium-octeon/smp.c
@@ -15,6 +15,7 @@
#include <linux/sched/task_stack.h>
#include <linux/init.h>
#include <linux/export.h>
+#include <linux/kexec.h>
#include <asm/mmu_context.h>
#include <asm/time.h>
@@ -424,6 +425,9 @@ const struct plat_smp_ops octeon_smp_ops = {
.cpu_disable = octeon_cpu_disable,
.cpu_die = octeon_cpu_die,
#endif
+#ifdef CONFIG_KEXEC
+ .kexec_nonboot_cpu = kexec_nonboot_cpu_jump,
+#endif
};
static irqreturn_t octeon_78xx_reched_interrupt(int irq, void *dev_id)
@@ -501,6 +505,9 @@ static const struct plat_smp_ops octeon_78xx_smp_ops = {
.cpu_disable = octeon_cpu_disable,
.cpu_die = octeon_cpu_die,
#endif
+#ifdef CONFIG_KEXEC
+ .kexec_nonboot_cpu = kexec_nonboot_cpu_jump,
+#endif
};
void __init octeon_setup_smp(void)
