blob: 46dc0ed8f7e48a2bff8c713572c3ea4d03fbe620 [file] [log] [blame]
/* 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>
#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 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);
psw_mask_set_bits(PSW_MASK_EXT);
/* Arm watchdog */
lowcore.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();
}