Commit a582e6f0 authored by Michael Cree's avatar Michael Cree Committed by Matt Turner
Browse files

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: default avatarMichael 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: default avatarMatt Turner <mattst88@gmail.com>
parent 21797c59

arch/alpha/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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,

arch/alpha/include/asm/perf_event.h

0 → 100644
+9 −0
Original line number Diff line number Diff line 
#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 */

arch/alpha/include/asm/unistd.h

+2 −1
Original line number Diff line number Diff line
@@ -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

arch/alpha/kernel/systbls.S

+1 −0
Original line number Diff line number Diff line
@@ -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

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