| 1 | /* |
| 2 | * S390X specific proc functions for linux-user |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 5 | */ |
| 6 | #ifndef S390X_TARGET_PROC_H |
| 7 | #define S390X_TARGET_PROC_H |
| 8 | |
| 9 | /* |
| 10 | * Emulate what a Linux kernel running in qemu-system-s390x -M accel=tcg would |
| 11 | * show in /proc/cpuinfo. |
| 12 | * |
| 13 | * Skip the following in order to match the missing support in op_ecag(): |
| 14 | * - show_cacheinfo(). |
| 15 | * - show_cpu_topology(). |
| 16 | * - show_cpu_mhz(). |
| 17 | * |
| 18 | * Use fixed values for certain fields: |
| 19 | * - bogomips per cpu - from a qemu-system-s390x run. |
| 20 | * - max thread id = 0, since SMT / SIGP_SET_MULTI_THREADING is not supported. |
| 21 | * |
| 22 | * Keep the code structure close to arch/s390/kernel/processor.c. |
| 23 | */ |
| 24 | |
| 25 | static void show_facilities(int fd) |
| 26 | { |
| 27 | size_t sizeof_stfl_bytes = 2048; |
| 28 | g_autofree uint8_t *stfl_bytes = g_new0(uint8_t, sizeof_stfl_bytes); |
| 29 | unsigned int bit; |
| 30 | |
| 31 | dprintf(fd, "facilities :"); |
| 32 | s390_get_feat_block(S390_FEAT_TYPE_STFL, stfl_bytes); |
| 33 | for (bit = 0; bit < sizeof_stfl_bytes * 8; bit++) { |
| 34 | if (test_be_bit(bit, stfl_bytes)) { |
| 35 | dprintf(fd, " %d", bit); |
| 36 | } |
| 37 | } |
| 38 | dprintf(fd, "\n"); |
| 39 | } |
| 40 | |
| 41 | static int cpu_ident(unsigned long n) |
| 42 | { |
| 43 | return deposit32(0, CPU_ID_BITS - CPU_PHYS_ADDR_BITS, CPU_PHYS_ADDR_BITS, |
| 44 | n); |
| 45 | } |
| 46 | |
| 47 | static void show_cpu_summary(CPUArchState *cpu_env, int fd) |
| 48 | { |
| 49 | S390CPUModel *model = env_archcpu(cpu_env)->model; |
| 50 | int num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 51 | uint32_t elf_hwcap = get_elf_hwcap(env_cpu(cpu_env)); |
| 52 | const char *hwcap_str; |
| 53 | int i; |
| 54 | |
| 55 | dprintf(fd, "vendor_id : IBM/S390\n" |
| 56 | "# processors : %i\n" |
| 57 | "bogomips per cpu: 13370.00\n", |
| 58 | num_cpus); |
| 59 | dprintf(fd, "max thread id : 0\n"); |
| 60 | dprintf(fd, "features\t: "); |
| 61 | for (i = 0; i < sizeof(elf_hwcap) * 8; i++) { |
| 62 | if (!(elf_hwcap & (1 << i))) { |
| 63 | continue; |
| 64 | } |
| 65 | hwcap_str = elf_hwcap_str(i); |
| 66 | if (hwcap_str) { |
| 67 | dprintf(fd, "%s ", hwcap_str); |
| 68 | } |
| 69 | } |
| 70 | dprintf(fd, "\n"); |
| 71 | show_facilities(fd); |
| 72 | for (i = 0; i < num_cpus; i++) { |
| 73 | dprintf(fd, "processor %d: " |
| 74 | "version = %02X, " |
| 75 | "identification = %06X, " |
| 76 | "machine = %04X\n", |
| 77 | i, model->cpu_ver, cpu_ident(i), model->def->type); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | static void show_cpu_ids(CPUArchState *cpu_env, int fd, unsigned long n) |
| 82 | { |
| 83 | S390CPUModel *model = env_archcpu(cpu_env)->model; |
| 84 | |
| 85 | dprintf(fd, "version : %02X\n", model->cpu_ver); |
| 86 | dprintf(fd, "identification : %06X\n", cpu_ident(n)); |
| 87 | dprintf(fd, "machine : %04X\n", model->def->type); |
| 88 | } |
| 89 | |
| 90 | static void show_cpuinfo(CPUArchState *cpu_env, int fd, unsigned long n) |
| 91 | { |
| 92 | dprintf(fd, "\ncpu number : %ld\n", n); |
| 93 | show_cpu_ids(cpu_env, fd, n); |
| 94 | } |
| 95 | |
| 96 | static int open_cpuinfo(CPUArchState *cpu_env, int fd) |
| 97 | { |
| 98 | int num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 99 | int i; |
| 100 | |
| 101 | show_cpu_summary(cpu_env, fd); |
| 102 | for (i = 0; i < num_cpus; i++) { |
| 103 | show_cpuinfo(cpu_env, fd, i); |
| 104 | } |
| 105 | return 0; |
| 106 | } |
| 107 | #define HAVE_ARCH_PROC_CPUINFO |
| 108 | |
| 109 | #endif /* S390X_TARGET_PROC_H */ |