| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Timer Event DIAG288 test |
| * |
| * Copyright (c) 2019 IBM Corp |
| * |
| * Authors: |
| * Janosch Frank <frankja@linux.ibm.com> |
| */ |
| |
| #include <libcflat.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/interrupt.h> |
| |
| struct lowcore *lc = (struct lowcore *)0x0; |
| |
| #define CODE_INIT 0 |
| #define CODE_CHANGE 1 |
| #define CODE_CANCEL 2 |
| |
| #define ACTION_RESTART 0 |
| |
| static inline void diag288(unsigned long code, unsigned long time, |
| unsigned long action) |
| { |
| register unsigned long fc asm("0") = code; |
| register unsigned long tm asm("1") = time; |
| register unsigned long ac asm("2") = action; |
| |
| asm volatile("diag %0,%2,0x288" |
| : : "d" (fc), "d" (tm), "d" (ac)); |
| } |
| |
| static void test_specs(void) |
| { |
| report_prefix_push("specification"); |
| |
| report_prefix_push("uneven"); |
| expect_pgm_int(); |
| asm volatile("diag 1,2,0x288"); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_push("unsupported action"); |
| expect_pgm_int(); |
| diag288(CODE_INIT, 15, 42); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_push("unsupported function"); |
| expect_pgm_int(); |
| diag288(42, 15, ACTION_RESTART); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_push("no init"); |
| expect_pgm_int(); |
| diag288(CODE_CANCEL, 15, ACTION_RESTART); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_push("min timer"); |
| expect_pgm_int(); |
| diag288(CODE_INIT, 14, ACTION_RESTART); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_pop(); |
| } |
| |
| static void test_priv(void) |
| { |
| report_prefix_push("privileged"); |
| expect_pgm_int(); |
| enter_pstate(); |
| diag288(CODE_INIT, 15, ACTION_RESTART); |
| check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION); |
| report_prefix_pop(); |
| } |
| |
| static void test_bite(void) |
| { |
| uint64_t mask, time; |
| |
| /* If watchdog doesn't bite, the cpu timer does */ |
| asm volatile("stck %0" : "=Q" (time) : : "cc"); |
| time += (uint64_t)(16000 * 1000) << 12; |
| asm volatile("sckc %0" : : "Q" (time)); |
| ctl_set_bit(0, CTL0_CLOCK_COMPARATOR); |
| mask = extract_psw_mask(); |
| mask |= PSW_MASK_EXT; |
| load_psw_mask(mask); |
| |
| /* Arm watchdog */ |
| lc->restart_new_psw.mask = extract_psw_mask() & ~PSW_MASK_EXT; |
| diag288(CODE_INIT, 15, ACTION_RESTART); |
| asm volatile(" larl %r0, 1f\n" |
| " stg %r0, 424\n" |
| "0: nop\n" |
| " j 0b\n" |
| "1:"); |
| report_pass("restart"); |
| } |
| |
| int main(void) |
| { |
| report_prefix_push("diag288"); |
| test_priv(); |
| test_specs(); |
| test_bite(); |
| return report_summary(); |
| } |