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authorDengcheng Zhu <dzhu@wavecomp.com>2018-09-12 00:49:21 +0300
committerPaul Burton <paul.burton@mips.com>2018-09-22 20:31:50 +0300
commit62cac480f33f8f9413d609cb1601b0ee521a86b8 (patch)
tree92d3e1e0e580cbc175cd27b77b0ddf7c931ac338 /arch/mips/loongson64
parentdc57aaf95a516f70e2d527d8287a0332c481a226 (diff)
downloadlinux-62cac480f33f8f9413d609cb1601b0ee521a86b8.tar.xz
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
Diffstat (limited to 'arch/mips/loongson64')
-rw-r--r--arch/mips/loongson64/loongson-3/smp.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/loongson64/loongson-3/smp.c b/arch/mips/loongson64/loongson-3/smp.c
index 361239bd6b78..b5c1e0aa955e 100644
--- a/arch/mips/loongson64/loongson-3/smp.c
+++ b/arch/mips/loongson64/loongson-3/smp.c
@@ -21,6 +21,7 @@
#include <linux/sched/task_stack.h>
#include <linux/smp.h>
#include <linux/cpufreq.h>
+#include <linux/kexec.h>
#include <asm/processor.h>
#include <asm/time.h>
#include <asm/clock.h>
@@ -749,4 +750,7 @@ const struct plat_smp_ops loongson3_smp_ops = {
.cpu_disable = loongson3_cpu_disable,
.cpu_die = loongson3_cpu_die,
#endif
+#ifdef CONFIG_KEXEC
+ .kexec_nonboot_cpu = kexec_nonboot_cpu_jump,
+#endif
};