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| author | Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com> | 2025-02-05 17:52:08 +0200 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2025-02-05 10:44:52 -0800 |
| commit | a7dd183f0b3848c056bbeed78ef5d5c52fe94d83 (patch) | |
| tree | db33818c1d8c401165e097991306676ecce87a1d /arch/x86/include/asm/smp.h | |
| parent | x86/cpu: Fix #define name for Intel CPU model 0x5A (diff) | |
| download | linux-a7dd183f0b3848c056bbeed78ef5d5c52fe94d83.tar.gz linux-a7dd183f0b3848c056bbeed78ef5d5c52fe94d83.zip | |
x86/smp: Allow calling mwait_play_dead with an arbitrary hint
Introduce a helper function to allow offlined CPUs to enter idle states
with a specific MWAIT hint. The new helper will be used in subsequent
patches by the acpi_idle and intel_idle drivers.
No functional change intended.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/all/20250205155211.329780-2-artem.bityutskiy%40linux.intel.com
Diffstat (limited to 'arch/x86/include/asm/smp.h')
| -rw-r--r-- | arch/x86/include/asm/smp.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h index ca073f40698f..80f8bfd83fc7 100644 --- a/arch/x86/include/asm/smp.h +++ b/arch/x86/include/asm/smp.h @@ -114,6 +114,7 @@ void wbinvd_on_cpu(int cpu); int wbinvd_on_all_cpus(void); void smp_kick_mwait_play_dead(void); +void mwait_play_dead(unsigned int eax_hint); void native_smp_send_reschedule(int cpu); void native_send_call_func_ipi(const struct cpumask *mask); @@ -164,6 +165,8 @@ static inline struct cpumask *cpu_llc_shared_mask(int cpu) { return (struct cpumask *)cpumask_of(0); } + +static inline void mwait_play_dead(unsigned int eax_hint) { } #endif /* CONFIG_SMP */ #ifdef CONFIG_DEBUG_NMI_SELFTEST |