diff options
| author | Simon Glass <sjg@chromium.org> | 2020-07-17 08:48:20 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-20 09:46:46 +0800 |
| commit | 99a573fb326faf5a7bff50e4f9875f2066728d95 (patch) | |
| tree | 7a7efde7ccc0fce8c5ce88a4bbafe98d7647b0c0 /arch/x86/include/asm/mp.h | |
| parent | 84d3ed125ad91c5973c4a071be5eea913bea34e5 (diff) | |
x86: mp: Park CPUs before running the OS
With the new MP features the CPUs are no-longer parked when the OS is run.
Fix this by calling a special function to park them, just before the OS is
started.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/include/asm/mp.h')
| -rw-r--r-- | arch/x86/include/asm/mp.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mp.h b/arch/x86/include/asm/mp.h index eb49e690f2..f9d6c8e6bf 100644 --- a/arch/x86/include/asm/mp.h +++ b/arch/x86/include/asm/mp.h @@ -109,6 +109,15 @@ typedef void (*mp_run_func)(void *arg); * @return 0 on success, -ve on error */ int mp_run_on_cpus(int cpu_select, mp_run_func func, void *arg); + +/** + * mp_park_aps() - Park the APs ready for the OS + * + * This halts all CPUs except the main one, ready for the OS to use them + * + * @return 0 if OK, -ve on error + */ +int mp_park_aps(void); #else static inline int mp_run_on_cpus(int cpu_select, mp_run_func func, void *arg) { @@ -117,6 +126,14 @@ static inline int mp_run_on_cpus(int cpu_select, mp_run_func func, void *arg) return 0; } + +static inline int mp_park_aps(void) +{ + /* No APs to park */ + + return 0; +} + #endif #endif /* _X86_MP_H_ */ |