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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c')
-rw-r--r-- | tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c b/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c new file mode 100644 index 000000000..bd1ace9a0 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2014, Michael Ellerman, IBM Corp. + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "ebb.h" + + +/* + * Test basic access to the EBB regs, they should be user accessible with no + * kernel interaction required. + */ +int reg_access(void) +{ + uint64_t val, expected; + + SKIP_IF(!ebb_is_supported()); + + expected = 0x8000000100000000ull; + mtspr(SPRN_BESCR, expected); + val = mfspr(SPRN_BESCR); + + FAIL_IF(val != expected); + + expected = 0x0000000001000000ull; + mtspr(SPRN_EBBHR, expected); + val = mfspr(SPRN_EBBHR); + + FAIL_IF(val != expected); + + return 0; +} + +int main(void) +{ + return test_harness(reg_access, "reg_access"); +} |