// 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"); }