alpha: Add minimal support for software performance events

In the kernel the patch enables configuration of the perf event
option, adds the perf_event_open syscall, and includes a minimal
architecture specific asm/perf_event.h header file.

Signed-off-by: Michael Cree <mcree@orcon.net.nz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Michael Cree 2009-12-08 14:27:01 -05:00 committed by Matt Turner
parent 21797c599c
commit a582e6f01b
4 changed files with 13 additions and 1 deletions

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@ -9,6 +9,7 @@ config ALPHA
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_SYSCALL_WRAPPERS
select HAVE_PERF_EVENTS
help
The Alpha is a 64-bit general-purpose processor designed and
marketed by the Digital Equipment Corporation of blessed memory,

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@ -0,0 +1,9 @@
#ifndef __ASM_ALPHA_PERF_EVENT_H
#define __ASM_ALPHA_PERF_EVENT_H
/* Alpha only supports software events through this interface. */
static inline void set_perf_event_pending(void) { }
#define PERF_EVENT_INDEX_OFFSET 0
#endif /* __ASM_ALPHA_PERF_EVENT_H */

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@ -448,10 +448,11 @@
#define __NR_preadv 490
#define __NR_pwritev 491
#define __NR_rt_tgsigqueueinfo 492
#define __NR_perf_event_open 493
#ifdef __KERNEL__
#define NR_SYSCALLS 493
#define NR_SYSCALLS 494
#define __ARCH_WANT_IPC_PARSE_VERSION
#define __ARCH_WANT_OLD_READDIR

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@ -511,6 +511,7 @@ sys_call_table:
.quad sys_preadv /* 490 */
.quad sys_pwritev
.quad sys_rt_tgsigqueueinfo
.quad sys_perf_event_open
.size sys_call_table, . - sys_call_table
.type sys_call_table, @object