3752e453f6
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>
40 lines
642 B
C
40 lines
642 B
C
/*
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* Copyright 2014, Michael Ellerman, IBM Corp.
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* Licensed under GPLv2.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "ebb.h"
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#include "reg.h"
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/*
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* Test basic access to the EBB regs, they should be user accessible with no
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* kernel interaction required.
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*/
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int reg_access(void)
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{
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uint64_t val, expected;
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expected = 0x8000000100000000ull;
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mtspr(SPRN_BESCR, expected);
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val = mfspr(SPRN_BESCR);
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FAIL_IF(val != expected);
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expected = 0x0000000001000000ull;
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mtspr(SPRN_EBBHR, expected);
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val = mfspr(SPRN_EBBHR);
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FAIL_IF(val != expected);
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return 0;
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}
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int main(void)
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{
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return test_harness(reg_access, "reg_access");
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}
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