From: Helge Deller <[email protected]> Mimic the entries for /proc/cpuinfo to what can be seen on the debian porterbox loomis.debian.org.
Cc: Song Gao <[email protected]> Cc: Bibo Mao <[email protected]> Cc: Jiaxun Yang <[email protected]> Signed-off-by: Helge Deller <[email protected]> --- linux-user/loongarch64/elfload.c | 20 +++++++ linux-user/loongarch64/target_proc.h | 79 +++++++++++++++++++++++++++- 2 files changed, 98 insertions(+), 1 deletion(-) diff --git a/linux-user/loongarch64/elfload.c b/linux-user/loongarch64/elfload.c index e53957e36d..2242f20202 100644 --- a/linux-user/loongarch64/elfload.c +++ b/linux-user/loongarch64/elfload.c @@ -28,6 +28,26 @@ enum { HWCAP_LOONGARCH_LBT_MIPS = (1 << 12), }; +const char *elf_hwcap_str(uint32_t bit) +{ + static const char *hwcap_str[] = { + [__builtin_ctz(HWCAP_LOONGARCH_CPUCFG )] = "cpucfg", + [__builtin_ctz(HWCAP_LOONGARCH_LAM )] = "lam", + [__builtin_ctz(HWCAP_LOONGARCH_UAL )] = "lam_bh", + [__builtin_ctz(HWCAP_LOONGARCH_FPU )] = "fpu", + [__builtin_ctz(HWCAP_LOONGARCH_LSX )] = "lsx", + [__builtin_ctz(HWCAP_LOONGARCH_LASX )] = "lasx", + [__builtin_ctz(HWCAP_LOONGARCH_CRC32 )] = "crc32", + [__builtin_ctz(HWCAP_LOONGARCH_COMPLEX )] = "complex", + [__builtin_ctz(HWCAP_LOONGARCH_CRYPTO )] = "crypto", + [__builtin_ctz(HWCAP_LOONGARCH_LVZ )] = "lvz", + [__builtin_ctz(HWCAP_LOONGARCH_LBT_X86 )] = "lbt_x86", + [__builtin_ctz(HWCAP_LOONGARCH_LBT_ARM )] = "lbt_arm", + [__builtin_ctz(HWCAP_LOONGARCH_LBT_MIPS)] = "lbt_mips", + }; + + return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL; +} abi_ulong get_elf_hwcap(CPUState *cs) { LoongArchCPU *cpu = LOONGARCH_CPU(cs); diff --git a/linux-user/loongarch64/target_proc.h b/linux-user/loongarch64/target_proc.h index 43fe29ca72..f739520fab 100644 --- a/linux-user/loongarch64/target_proc.h +++ b/linux-user/loongarch64/target_proc.h @@ -1 +1,78 @@ -/* No target-specific /proc support */ +/* + * Loongson specific proc functions for linux-user + * + * Copyright (c) 2026 Helge Deller + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#ifndef LOONGARCH_TARGET_PROC_H +#define LOONGARCH_TARGET_PROC_H + +static int open_cpuinfo(CPUArchState *cpu_env, int fd) +{ + uint32_t elf_hwcap = get_elf_hwcap(env_cpu(cpu_env)); + uint32_t prid, ser_id, pabits, vabits, i, n, num_cpus; + bool is_64bit = is_la64(cpu_env); + const char *hwcap_str; + struct timespec res; + double freq_mhz; + +#if TARGET_LONG_BITS == 32 + pabits = 31; + vabits = 31; +#else + pabits = FIELD_EX32(cpu_env->cpucfg[1], CPUCFG1, PALEN); + vabits = FIELD_EX32(cpu_env->cpucfg[1], CPUCFG1, VALEN); +#endif + + if (clock_getres(CLOCK_REALTIME, &res) == -1) { + res.tv_nsec = 1; + } + freq_mhz = 1000.0 / res.tv_nsec; + + ser_id = FIELD_EX32(cpu_env->cpucfg[0], CPUCFG0, SERID); + prid = FIELD_EX32(cpu_env->cpucfg[0], CPUCFG0, PRID); + + dprintf(fd, "system type\t\t: generic-loongson-machine\n"); + + num_cpus = sysconf(_SC_NPROCESSORS_ONLN); + for (n = 0; n < num_cpus; n++) { + dprintf(fd, "\nprocessor\t\t: %d\n", n); + dprintf(fd, "package\t\t\t: 0\n"); + dprintf(fd, "core\t\t\t: %d\n", n); + dprintf(fd, "global_id\t\t: %d\n", n); + dprintf(fd, "CPU Family\t\t: Loongson-%dbit\n", is_64bit ? 64 : 32); + dprintf(fd, "Model Name\t\t: QEMU_user-v" QEMU_VERSION "\n"); + dprintf(fd, "PRID\t\t\t: %s (%08x)\n", + ser_id == PRID_SERIES_LA464 ? "LA464" : + ser_id == PRID_SERIES_LA132 ? "LA132" : "Unknown", + cpu_env->cpucfg[0]); + dprintf(fd, "CPU Revision\t\t: 0x%02x\n", prid); + dprintf(fd, "FPU Revision\t\t: 0x%02x\n", + FIELD_EX32(cpu_env->cpucfg[2], CPUCFG2, FP_VER)); + dprintf(fd, "CPU MHz\t\t\t: %.2f\n", freq_mhz); + dprintf(fd, "Address Sizes\t\t: %d bits physical, %d bits virtual\n", + pabits + 1, vabits + 1); + + dprintf(fd, "ISA\t\t\t:%s", " loongarch32r loongarch32s"); + if (is_64bit) { + dprintf(fd, " loongarch64"); + } + + dprintf(fd, "\nFeatures\t\t:"); + for (i = 0; i < sizeof(elf_hwcap) * 8; i++) { + if (!(elf_hwcap & (1 << i))) { + continue; + } + hwcap_str = elf_hwcap_str(i); + if (hwcap_str) { + dprintf(fd, " %s", hwcap_str); + } + } + dprintf(fd, "\nHardware Watchpoint\t: no\n"); + } + return 0; +} +#define HAVE_ARCH_PROC_CPUINFO + +#endif /* LOONGARCH_TARGET_PROC_H */ -- 2.54.0
