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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2022 ARM Limited
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sys/auxv.h>
#include <sys/prctl.h>
#include <asm/hwcap.h>
#include "kselftest.h"
static int set_tagged_addr_ctrl(int val)
{
int ret;
ret = prctl(PR_SET_TAGGED_ADDR_CTRL, val, 0, 0, 0);
if (ret < 0)
ksft_print_msg("PR_SET_TAGGED_ADDR_CTRL: failed %d %d (%s)\n",
ret, errno, strerror(errno));
return ret;
}
static int get_tagged_addr_ctrl(void)
{
int ret;
ret = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0);
if (ret < 0)
ksft_print_msg("PR_GET_TAGGED_ADDR_CTRL failed: %d %d (%s)\n",
ret, errno, strerror(errno));
return ret;
}
/*
* Read the current mode without having done any configuration, should
* run first.
*/
void check_basic_read(void)
{
int ret;
ret = get_tagged_addr_ctrl();
if (ret < 0) {
ksft_test_result_fail("check_basic_read\n");
return;
}
if (ret & PR_MTE_TCF_SYNC)
ksft_print_msg("SYNC enabled\n");
if (ret & PR_MTE_TCF_ASYNC)
ksft_print_msg("ASYNC enabled\n");
/* Any configuration is valid */
ksft_test_result_pass("check_basic_read\n");
}
/*
* Attempt to set a specified combination of modes.
*/
void set_mode_test(const char *name, int hwcap2, int mask)
{
int ret;
if ((getauxval(AT_HWCAP2) & hwcap2) != hwcap2) {
ksft_test_result_skip("%s\n", name);
return;
}
ret = set_tagged_addr_ctrl(mask);
if (ret < 0) {
ksft_test_result_fail("%s\n", name);
return;
}
ret = get_tagged_addr_ctrl();
if (ret < 0) {
ksft_test_result_fail("%s\n", name);
return;
}
if ((ret & PR_MTE_TCF_MASK) == mask) {
ksft_test_result_pass("%s\n", name);
} else {
ksft_print_msg("Got %x, expected %x\n",
(ret & PR_MTE_TCF_MASK), mask);
ksft_test_result_fail("%s\n", name);
}
}
struct mte_mode {
int mask;
int hwcap2;
const char *name;
} mte_modes[] = {
{ PR_MTE_TCF_NONE, 0, "NONE" },
{ PR_MTE_TCF_SYNC, HWCAP2_MTE, "SYNC" },
{ PR_MTE_TCF_ASYNC, HWCAP2_MTE, "ASYNC" },
{ PR_MTE_TCF_SYNC | PR_MTE_TCF_ASYNC, HWCAP2_MTE, "SYNC+ASYNC" },
};
int main(void)
{
int i;
ksft_print_header();
ksft_set_plan(5);
check_basic_read();
for (i = 0; i < ARRAY_SIZE(mte_modes); i++)
set_mode_test(mte_modes[i].name, mte_modes[i].hwcap2,
mte_modes[i].mask);
ksft_print_cnts();
return 0;
}
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