Messages in this thread Patch in this message | | | Date | Fri, 11 Dec 2009 12:54:33 GMT | From | tip-bot for Jamie Iles <> | Subject | [tip:perf/urgent] perf tools: Allow building for ARM |
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Commit-ID: 58e9f94138c1d9c47f6a63632ca7a78fc6dcc15f Gitweb: http://git.kernel.org/tip/58e9f94138c1d9c47f6a63632ca7a78fc6dcc15f Author: Jamie Iles <jamie.iles@picochip.com> AuthorDate: Fri, 11 Dec 2009 12:20:09 +0000 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Fri, 11 Dec 2009 13:50:21 +0100
perf tools: Allow building for ARM
Add definitions of rmb() and cpu_relax() and include the ARM unistd.h header. The __kuser_memory_barrier helper in the helper page is used to provide the correct memory barrier depending on the CPU type.
[ The rmb() will work on v6 and v7, segfault on v5. Dynamic detection to add v5 support will be added later. ]
Signed-off-by: Jamie Iles <jamie.iles@picochip.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mikael Pettersson <mikpe@it.uu.se> LKML-Reference: <1260534009-5394-1-git-send-email-jamie.iles@picochip.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- tools/perf/perf.h | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 454d5d5..75f941b 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -59,6 +59,18 @@ #define cpu_relax() asm volatile ("hint @pause" ::: "memory") #endif +#ifdef __arm__ +#include "../../arch/arm/include/asm/unistd.h" +/* + * Use the __kuser_memory_barrier helper in the CPU helper page. See + * arch/arm/kernel/entry-armv.S in the kernel source for details. + */ +#define rmb() asm volatile("mov r0, #0xffff0fff; mov lr, pc;" \ + "sub pc, r0, #95" ::: "r0", "lr", "cc", \ + "memory") +#define cpu_relax() asm volatile("":::"memory") +#endif + #include <time.h> #include <unistd.h> #include <sys/types.h>
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