diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2023-05-12 23:07:29 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-05-15 13:44:56 +0200 |
| commit | 2711b8e2b71fa3cce9c28b0f07b75882f141adfe (patch) | |
| tree | 19bb6bf401793544a552de96d0488e7e267f717f /arch/x86/include/asm/smp.h | |
| parent | cpu/hotplug: Add CPU state tracking and synchronization (diff) | |
| download | linux-2711b8e2b71fa3cce9c28b0f07b75882f141adfe.tar.xz linux-2711b8e2b71fa3cce9c28b0f07b75882f141adfe.zip | |
x86/smpboot: Switch to hotplug core state synchronization
The new AP state tracking and synchronization mechanism in the CPU hotplug
core code allows to remove quite some x86 specific code:
1) The AP alive synchronization based on cpumasks
2) The decision whether an AP can be brought up again
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Helge Deller <deller@gmx.de> # parisc
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck
Link: https://lore.kernel.org/r/20230512205256.529657366@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/smp.h')
| -rw-r--r-- | arch/x86/include/asm/smp.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h index 0ec4c64a1981..693c9997c069 100644 --- a/arch/x86/include/asm/smp.h +++ b/arch/x86/include/asm/smp.h @@ -38,6 +38,8 @@ struct smp_ops { void (*crash_stop_other_cpus)(void); void (*smp_send_reschedule)(int cpu); + void (*cleanup_dead_cpu)(unsigned cpu); + void (*poll_sync_state)(void); int (*cpu_up)(unsigned cpu, struct task_struct *tidle); int (*cpu_disable)(void); void (*cpu_die)(unsigned int cpu); @@ -90,7 +92,8 @@ static inline int __cpu_disable(void) static inline void __cpu_die(unsigned int cpu) { - smp_ops.cpu_die(cpu); + if (smp_ops.cpu_die) + smp_ops.cpu_die(cpu); } static inline void __noreturn play_dead(void) @@ -123,8 +126,6 @@ void native_smp_cpus_done(unsigned int max_cpus); int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); int native_cpu_disable(void); -int common_cpu_die(unsigned int cpu); -void native_cpu_die(unsigned int cpu); void __noreturn hlt_play_dead(void); void native_play_dead(void); void play_dead_common(void); |