sparc: add basic support for 'perf'

This wires up the perf_counter_open() syscall so that basic
software support for perf is working.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index b847f88..2aa7cd3 100644 (file)
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -25,6 +25,7 @@ config SPARC
        select ARCH_WANT_OPTIONAL_GPIOLIB
        select RTC_CLASS
        select RTC_DRV_M48T59
+       select HAVE_PERF_COUNTERS
 
 config SPARC32
        def_bool !64BIT
@@ -44,6 +45,7 @@ config SPARC64
        select RTC_DRV_BQ4802
        select RTC_DRV_SUN4V
        select RTC_DRV_STARFIRE
+       select HAVE_PERF_COUNTERS
 
 config ARCH_DEFCONFIG
        string

diff --git a/arch/sparc/include/asm/perf_counter.h b/arch/sparc/include/asm/perf_counter.h
new file mode 100644 (file)
index 0000000..f07c587
--- /dev/null
+++ b/arch/sparc/include/asm/perf_counter.h
@@ -0,0 +1,8 @@
+#ifndef __ASM_SPARC_PERF_COUNTER_H
+#define __ASM_SPARC_PERF_COUNTER_H
+
+static inline void set_perf_counter_pending(void) { }
+
+#define        PERF_COUNTER_INDEX_OFFSET       0
+
+#endif

diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h
index b2c406d..706df66 100644 (file)
--- a/arch/sparc/include/asm/unistd.h
+++ b/arch/sparc/include/asm/unistd.h
@@ -395,8 +395,9 @@
 #define __NR_preadv            324
 #define __NR_pwritev           325
 #define __NR_rt_tgsigqueueinfo 326
+#define __NR_perf_counter_open 327
 
-#define NR_SYSCALLS            327
+#define NR_SYSCALLS            328
 
 #ifdef __32bit_syscall_numbers__
 /* Sparc 32-bit only has the "setresuid32", "getresuid32" variants,

diff --git a/arch/sparc/kernel/systbls_32.S b/arch/sparc/kernel/systbls_32.S
index 6909016..0418157 100644 (file)
--- a/arch/sparc/kernel/systbls_32.S
+++ b/arch/sparc/kernel/systbls_32.S
@@ -82,5 +82,5 @@ sys_call_table:
 /*310*/        .long sys_utimensat, sys_signalfd, sys_timerfd_create, sys_eventfd, sys_fallocate
 /*315*/        .long sys_timerfd_settime, sys_timerfd_gettime, sys_signalfd4, sys_eventfd2, sys_epoll_create1
 /*320*/        .long sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, sys_preadv
-/*325*/        .long sys_pwritev, sys_rt_tgsigqueueinfo
+/*325*/        .long sys_pwritev, sys_rt_tgsigqueueinfo, sys_perf_counter_open
 

diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 2ee7250..91b06b7 100644 (file)
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -83,7 +83,7 @@ sys_call_table32:
 /*310*/        .word compat_sys_utimensat, compat_sys_signalfd, sys_timerfd_create, sys_eventfd, compat_sys_fallocate
        .word compat_sys_timerfd_settime, compat_sys_timerfd_gettime, compat_sys_signalfd4, sys_eventfd2, sys_epoll_create1
 /*320*/        .word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, compat_sys_preadv
-       .word compat_sys_pwritev, compat_sys_rt_tgsigqueueinfo
+       .word compat_sys_pwritev, compat_sys_rt_tgsigqueueinfo, sys_perf_counter_open
 
 #endif /* CONFIG_COMPAT */
 
@@ -158,4 +158,4 @@ sys_call_table:
 /*310*/        .word sys_utimensat, sys_signalfd, sys_timerfd_create, sys_eventfd, sys_fallocate
        .word sys_timerfd_settime, sys_timerfd_gettime, sys_signalfd4, sys_eventfd2, sys_epoll_create1
 /*320*/        .word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, sys_preadv
-       .word sys_pwritev, sys_rt_tgsigqueueinfo
+       .word sys_pwritev, sys_rt_tgsigqueueinfo, sys_perf_counter_open

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index e5148e2..2abeb20 100644 (file)
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -41,6 +41,12 @@
 #define cpu_relax()    asm volatile("" ::: "memory");
 #endif
 
+#ifdef __sparc__
+#include "../../arch/sparc/include/asm/unistd.h"
+#define rmb()          asm volatile("":::"memory")
+#define cpu_relax()    asm volatile("":::"memory")
+#endif
+
 #include <time.h>
 #include <unistd.h>
 #include <sys/types.h>