diff options
| author | Vojtech Pavlik <vojtech@suse.cz> | 2006-09-26 08:52:28 (GMT) |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 08:52:28 (GMT) |
| commit | c08c820508233b424deab3302bc404bbecc6493a (patch) | |
| tree | d6ed79fb2d03513f6c71fc7e47705c4a19512f53 /include/asm-x86_64/smp.h | |
| parent | a670fad0adb1cc6202a607d250f10bd380593905 (diff) | |
| download | linux-c08c820508233b424deab3302bc404bbecc6493a.tar.xz | |
[PATCH] Add the vgetcpu vsyscall
This patch adds a vgetcpu vsyscall, which depending on the CPU RDTSCP
capability uses either the RDTSCP or CPUID to obtain a CPU and node
numbers and pass them to the program.
AK: Lots of changes over Vojtech's original code:
Better prototype for vgetcpu()
It's better to pass the cpu / node numbers as separate arguments
to avoid mistakes when going from SMP to NUMA.
Also add a fast time stamp based cache using a user supplied
argument to speed things more up.
Use fast method from Chuck Ebbert to retrieve node/cpu from
GDT limit instead of CPUID
Made sure RDTSCP init is always executed after node is known.
Drop printk
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/asm-x86_64/smp.h')
| -rw-r--r-- | include/asm-x86_64/smp.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h index 6805e1f..d61547f 100644 --- a/include/asm-x86_64/smp.h +++ b/include/asm-x86_64/smp.h @@ -133,13 +133,19 @@ static __inline int logical_smp_processor_id(void) /* we don't want to mark this access volatile - bad code generation */ return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR)); } -#endif #ifdef CONFIG_SMP #define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu] #else #define cpu_physical_id(cpu) boot_cpu_id -#endif - +static inline int smp_call_function_single(int cpuid, void (*func) (void *info), + void *info, int retry, int wait) +{ + /* Disable interrupts here? */ + func(info); + return 0; +} +#endif /* !CONFIG_SMP */ +#endif /* !__ASSEMBLY */ #endif |