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| author | Michael Ellerman <mpe@ellerman.id.au> | 2014-06-10 12:23:10 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-06-11 07:03:58 (GMT) |
| commit | 3752e453f6bafd78e5586cc2b2e33ee4b6e1566d (patch) | |
| tree | 2c5d88b6d9f759844249a36ce8b729dcb5c274ad /tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S | |
| parent | 33b4819f3b93bbcb934e02cbc64ff3c5e9d0149b (diff) | |
| download | linux-3752e453f6bafd78e5586cc2b2e33ee4b6e1566d.tar.xz | |
selftests/powerpc: Add tests of PMU EBBs
The Power8 Performance Monitor Unit (PMU) has a new feature called Event
Based Branches (EBB). This commit adds tests of the kernel API for using
EBBs.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S')
| -rw-r--r-- | tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S b/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S new file mode 100644 index 0000000..b866a05 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S @@ -0,0 +1,43 @@ +/* + * Copyright 2014, Michael Ellerman, IBM Corp. + * Licensed under GPLv2. + */ + +#include <ppc-asm.h> + + .text + +FUNC_START(thirty_two_instruction_loop) + cmpwi r3,0 + beqlr + addi r4,r3,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 + addi r4,r4,1 # 28 addi's + subi r3,r3,1 + b FUNC_NAME(thirty_two_instruction_loop) +FUNC_END(thirty_two_instruction_loop) |