| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (C) 2022 ARM Limited |
| 3 | |
| 4 | #include <stdbool.h> |
| 5 | #include <stdio.h> |
| 6 | #include <string.h> |
| 7 | |
| 8 | #include <sys/auxv.h> |
| 9 | #include <sys/prctl.h> |
| 10 | |
| 11 | #include <asm/hwcap.h> |
| 12 | |
| 13 | #include "kselftest.h" |
| 14 | |
| 15 | static int set_tagged_addr_ctrl(int val) |
| 16 | { |
| 17 | int ret; |
| 18 | |
| 19 | ret = prctl(PR_SET_TAGGED_ADDR_CTRL, val, 0, 0, 0); |
| 20 | if (ret < 0) |
| 21 | ksft_print_msg("PR_SET_TAGGED_ADDR_CTRL: failed %d %d (%s)\n" , |
| 22 | ret, errno, strerror(errno)); |
| 23 | return ret; |
| 24 | } |
| 25 | |
| 26 | static int get_tagged_addr_ctrl(void) |
| 27 | { |
| 28 | int ret; |
| 29 | |
| 30 | ret = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0); |
| 31 | if (ret < 0) |
| 32 | ksft_print_msg("PR_GET_TAGGED_ADDR_CTRL failed: %d %d (%s)\n" , |
| 33 | ret, errno, strerror(errno)); |
| 34 | return ret; |
| 35 | } |
| 36 | |
| 37 | /* |
| 38 | * Read the current mode without having done any configuration, should |
| 39 | * run first. |
| 40 | */ |
| 41 | void check_basic_read(void) |
| 42 | { |
| 43 | int ret; |
| 44 | |
| 45 | ret = get_tagged_addr_ctrl(); |
| 46 | if (ret < 0) { |
| 47 | ksft_test_result_fail("check_basic_read\n" ); |
| 48 | return; |
| 49 | } |
| 50 | |
| 51 | if (ret & PR_MTE_TCF_SYNC) |
| 52 | ksft_print_msg("SYNC enabled\n" ); |
| 53 | if (ret & PR_MTE_TCF_ASYNC) |
| 54 | ksft_print_msg("ASYNC enabled\n" ); |
| 55 | |
| 56 | /* Any configuration is valid */ |
| 57 | ksft_test_result_pass("check_basic_read\n" ); |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Attempt to set a specified combination of modes. |
| 62 | */ |
| 63 | void set_mode_test(const char *name, int hwcap2, int mask) |
| 64 | { |
| 65 | int ret; |
| 66 | |
| 67 | if ((getauxval(AT_HWCAP2) & hwcap2) != hwcap2) { |
| 68 | ksft_test_result_skip("%s\n" , name); |
| 69 | return; |
| 70 | } |
| 71 | |
| 72 | ret = set_tagged_addr_ctrl(mask); |
| 73 | if (ret < 0) { |
| 74 | ksft_test_result_fail("%s\n" , name); |
| 75 | return; |
| 76 | } |
| 77 | |
| 78 | ret = get_tagged_addr_ctrl(); |
| 79 | if (ret < 0) { |
| 80 | ksft_test_result_fail("%s\n" , name); |
| 81 | return; |
| 82 | } |
| 83 | |
| 84 | if ((ret & PR_MTE_TCF_MASK) == mask) { |
| 85 | ksft_test_result_pass("%s\n" , name); |
| 86 | } else { |
| 87 | ksft_print_msg("Got %x, expected %x\n" , |
| 88 | (ret & (int)PR_MTE_TCF_MASK), mask); |
| 89 | ksft_test_result_fail("%s\n" , name); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | struct mte_mode { |
| 94 | int mask; |
| 95 | int hwcap2; |
| 96 | const char *name; |
| 97 | } mte_modes[] = { |
| 98 | { PR_MTE_TCF_NONE, 0, "NONE" }, |
| 99 | { PR_MTE_TCF_SYNC, HWCAP2_MTE, "SYNC" }, |
| 100 | { PR_MTE_TCF_ASYNC, HWCAP2_MTE, "ASYNC" }, |
| 101 | { PR_MTE_TCF_SYNC | PR_MTE_TCF_ASYNC, HWCAP2_MTE, "SYNC+ASYNC" }, |
| 102 | }; |
| 103 | |
| 104 | int main(void) |
| 105 | { |
| 106 | int i; |
| 107 | |
| 108 | ksft_print_header(); |
| 109 | ksft_set_plan(5); |
| 110 | |
| 111 | check_basic_read(); |
| 112 | for (i = 0; i < ARRAY_SIZE(mte_modes); i++) |
| 113 | set_mode_test(name: mte_modes[i].name, hwcap2: mte_modes[i].hwcap2, |
| 114 | mask: mte_modes[i].mask); |
| 115 | |
| 116 | ksft_print_cnts(); |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |