From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AFFF7CD98F0 for ; Thu, 18 Jun 2026 21:55:24 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1waKgv-0003gS-Qu; Thu, 18 Jun 2026 17:54:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1waKgu-0003fp-Gt for qemu-devel@nongnu.org; Thu, 18 Jun 2026 17:54:28 -0400 Received: from sea.source.kernel.org ([172.234.252.31]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1waKgs-0002KE-OM for qemu-devel@nongnu.org; Thu, 18 Jun 2026 17:54:28 -0400 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 4327443CD9; Thu, 18 Jun 2026 21:54:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 520081F000E9; Thu, 18 Jun 2026 21:54:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781819659; bh=Il/D/59EcDGFMbeKx110OhFMLzw22+Wm+90eKW+Hs6k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=UNeHbB6w1oKKdo3zLf8BWamjxmDnlyhF5y8YKMj8pT3qN/Kqg1VaW0f4dBFvU0o8X 5i2QDhn+AzEU73A/lHQtLD99RlQ+nW8asnM4SY9YUKA1o/gGcpxdet2a5b4B3zuxHy d/fC/H/O1ZsQVme61N/93g2TaE8ZiFt5MfnaKml6QNvtldDDYOBqJsg4YMu2ABRN1X Ojy4fv/pqaZ/Gj9/UcjPebLVIWJkoOgHb/TQPO/ed2DppSqwGTxxJ9VUpaWUMzOxSa iCnxPrOcuXS9/nJbGcu/tDtQdXhh66EvE8RmpU7WFd9suZ3iIz3nqFZA0+z8naFjCO 6cBSpv32DTMxQ== From: Helge Deller To: qemu-devel@nongnu.org, Stefan Hajnoczi Cc: Pierrick Bouvier , Laurent Vivier , deller@gmx.de, Song Gao , Bibo Mao , Jiaxun Yang Subject: [PULL 2/4] linux-user: Implement /proc/cpuinfo for loongarch cpus Date: Thu, 18 Jun 2026 23:54:09 +0200 Message-ID: <20260618215411.22057-3-deller@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260618215411.22057-1-deller@kernel.org> References: <20260618215411.22057-1-deller@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=172.234.252.31; envelope-from=deller@kernel.org; helo=sea.source.kernel.org X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Helge Deller Mimic the entries for /proc/cpuinfo to what can be seen on the debian porterbox loomis.debian.org. Cc: Song Gao Cc: Bibo Mao Cc: Jiaxun Yang Signed-off-by: Helge Deller --- 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