diff options
Diffstat (limited to 'arch/x86/include/asm/ipi.h')
| -rw-r--r-- | arch/x86/include/asm/ipi.h | 61 |
1 files changed, 59 insertions, 2 deletions
diff --git a/arch/x86/include/asm/ipi.h b/arch/x86/include/asm/ipi.h index a8d717f2c7e..e2e8e4e0a65 100644 --- a/arch/x86/include/asm/ipi.h +++ b/arch/x86/include/asm/ipi.h @@ -1,6 +1,8 @@ #ifndef _ASM_X86_IPI_H #define _ASM_X86_IPI_H +#ifdef CONFIG_X86_LOCAL_APIC + /* * Copyright 2004 James Cleverdon, IBM. * Subject to the GNU Public License, v.2 @@ -56,8 +58,7 @@ static inline void __xapic_wait_icr_idle(void) } static inline void -__default_send_IPI_shortcut(unsigned int shortcut, - int vector, unsigned int dest) +__default_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest) { /* * Subtle. In the case of the 'never do double writes' workaround @@ -156,4 +157,60 @@ default_send_IPI_mask_allbutself(const struct cpumask *mask, int vector) local_irq_restore(flags); } + +/* Avoid include hell */ +#define NMI_VECTOR 0x02 + +void default_send_IPI_mask_bitmask(const struct cpumask *mask, int vector); +void default_send_IPI_mask_allbutself(const struct cpumask *mask, int vector); + +extern int no_broadcast; + +#ifdef CONFIG_X86_64 +#include <asm/genapic.h> +#else +static inline void default_send_IPI_mask(const struct cpumask *mask, int vector) +{ + default_send_IPI_mask_bitmask(mask, vector); +} +void default_send_IPI_mask_allbutself(const struct cpumask *mask, int vector); +#endif + +static inline void __default_local_send_IPI_allbutself(int vector) +{ + if (no_broadcast || vector == NMI_VECTOR) + apic->send_IPI_mask_allbutself(cpu_online_mask, vector); + else + __default_send_IPI_shortcut(APIC_DEST_ALLBUT, vector, apic->dest_logical); +} + +static inline void __default_local_send_IPI_all(int vector) +{ + if (no_broadcast || vector == NMI_VECTOR) + apic->send_IPI_mask(cpu_online_mask, vector); + else + __default_send_IPI_shortcut(APIC_DEST_ALLINC, vector, apic->dest_logical); +} + +#ifdef CONFIG_X86_32 +static inline void default_send_IPI_allbutself(int vector) +{ + /* + * if there are no other CPUs in the system then we get an APIC send + * error if we try to broadcast, thus avoid sending IPIs in this case. + */ + if (!(num_online_cpus() > 1)) + return; + + __default_local_send_IPI_allbutself(vector); +} + +static inline void default_send_IPI_all(int vector) +{ + __default_local_send_IPI_all(vector); +} +#endif + +#endif + #endif /* _ASM_X86_IPI_H */ |