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| author |   Josh Poimboeuf <jpoimboe@redhat.com> | 2019-03-27 07:00:29 -0500 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-04-02 12:36:56 +0200 |
| commit | de7b77e5bb9451417ca57f1b6501da654587c048 (patch) | |
| tree | fd3602eff330452501e3489c865a7fc26e1bed8a /include/linux/cpu.h | |
| parent | Linux 5.1-rc3 (diff) | |
| download | wireguard-linux-de7b77e5bb9451417ca57f1b6501da654587c048.tar.xz wireguard-linux-de7b77e5bb9451417ca57f1b6501da654587c048.zip | |
cpu/hotplug: Create SMT sysfs interface for all arches
Make the /sys/devices/system/cpu/smt/* files available on all arches, so
user space has a consistent way to detect whether SMT is enabled.
The 'control' file now shows 'notimplemented' for architectures which
don't yet have CONFIG_HOTPLUG_SMT.
[ tglx: Make notimplemented a real state ]
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Kosina <jikos@kernel.org>
Link: https://lkml.kernel.org/r/469c2b98055f2c41e75748e06447d592a64080c9.1553635520.git.jpoimboe@redhat.com
Diffstat (limited to 'include/linux/cpu.h')
| -rw-r--r-- | include/linux/cpu.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 5041357d0297..ae99dde02320 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -175,6 +175,7 @@ enum cpuhp_smt_control { CPU_SMT_DISABLED, CPU_SMT_FORCE_DISABLED, CPU_SMT_NOT_SUPPORTED, + CPU_SMT_NOT_IMPLEMENTED, }; #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_SMT) @@ -182,7 +183,7 @@ extern enum cpuhp_smt_control cpu_smt_control; extern void cpu_smt_disable(bool force); extern void cpu_smt_check_topology(void); #else -# define cpu_smt_control (CPU_SMT_ENABLED) +# define cpu_smt_control (CPU_SMT_NOT_IMPLEMENTED) static inline void cpu_smt_disable(bool force) { } static inline void cpu_smt_check_topology(void) { } #endif |