41 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright 2014, Michael Ellerman, IBM Corp.4 */5 6#include <stdio.h>7#include <stdlib.h>8 9#include "ebb.h"10 11 12/*13 * Test basic access to the EBB regs, they should be user accessible with no14 * kernel interaction required.15 */16int reg_access(void)17{18 uint64_t val, expected;19 20 SKIP_IF(!ebb_is_supported());21 22 expected = 0x8000000100000000ull;23 mtspr(SPRN_BESCR, expected);24 val = mfspr(SPRN_BESCR);25 26 FAIL_IF(val != expected);27 28 expected = 0x0000000001000000ull;29 mtspr(SPRN_EBBHR, expected);30 val = mfspr(SPRN_EBBHR);31 32 FAIL_IF(val != expected);33 34 return 0;35}36 37int main(void)38{39 return test_harness(reg_access, "reg_access");40}41