From nobody Sun Jul 26 13:26:57 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; t=1781638536; cv=none; d=zohomail.com; s=zohoarc; b=dmP4nPHJLLFHgzyoDfYDvaFy3PN41qLrh2YkGX1yY+W72Od5MxY5EX/3an2Q010WThGwEXuFXh1oKKLANjtdTFXageOdtIu9ZAM/jEd6KyZTatgYbZFABoHXbJQqE+leAL2e/mCElXGCqA3ISEbDVAZk6qdYt+aHgYz1vpBKHso= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1781638536; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=Il/D/59EcDGFMbeKx110OhFMLzw22+Wm+90eKW+Hs6k=; b=Gia0DTjW0VYqXxc7zmTu6KXkn2ix+b0CG93Ru9d3VxKENAw+HCLSDroT1sBN5DIL9HIKMFQtX2szogYNSnYSYtdNGxeJ/expjVM0REf3NIRa1I9NsEX7AJXQPOHLhXQl2ScPX43ampbLOjCauC9hPbgpm2Y1FLOP0GHOohOFCWE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1781638536992849.8898467054414; Tue, 16 Jun 2026 12:35:36 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wZZYr-000409-42; Tue, 16 Jun 2026 15:35:01 -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 1wZZYp-0003zQ-32 for qemu-devel@nongnu.org; Tue, 16 Jun 2026 15:34:59 -0400 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wZZYm-00010f-A2 for qemu-devel@nongnu.org; Tue, 16 Jun 2026 15:34:58 -0400 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id C942844326; Tue, 16 Jun 2026 19:34:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14DC61F000E9; Tue, 16 Jun 2026 19:34:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781638486; bh=Il/D/59EcDGFMbeKx110OhFMLzw22+Wm+90eKW+Hs6k=; h=From:To:Cc:Subject:Date; b=EFW4rISsPgS42B9DaNyTCP7mc9H/KJ0b8UNidbD00Yp+WujfPnYfEfL85MNvoB9Jp 6Uwo0mF1oWFl1VqQ+XFkhLhXiTTgc4tO56dF5/t2L78bAfwMUe/uNZwmV51f7WtU+r HRJB7IgdgMr8X/1k87ueFgZypWeVBeE/mixs9/hgTq8qutb37mraHRvMFmXSzmB46W v99dIZeWD3NgntsdTJ9RSElG1QvBA0Deatt5CUFSjH1mE7j/BgTo08lppAljL3Adhl LSi66P3QLc76yc+ncc+dgAUD2vG13QFRIEprnOSjw9ratlpe0kgVExdjmqlPMVWJ+p yMMqpRjF35ENA== From: Helge Deller To: qemu-devel@nongnu.org Cc: Helge Deller , Song Gao , Bibo Mao , Jiaxun Yang Subject: [PATCH] linux-user: Implement /proc/cpuinfo for loongarch cpus Date: Tue, 16 Jun 2026 21:34:32 +0200 Message-ID: <20260616193432.39387-1-deller@kernel.org> X-Mailer: git-send-email 2.54.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=2600:3c0a:e001:78e:0:1991:8:25; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @kernel.org) X-ZM-MESSAGEID: 1781638538304158500 Content-Type: text/plain; charset="utf-8" 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/elfl= oad.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 =3D (1 << 12), }; =20 +const char *elf_hwcap_str(uint32_t bit) +{ + static const char *hwcap_str[] =3D { + [__builtin_ctz(HWCAP_LOONGARCH_CPUCFG )] =3D "cpucfg", + [__builtin_ctz(HWCAP_LOONGARCH_LAM )] =3D "lam", + [__builtin_ctz(HWCAP_LOONGARCH_UAL )] =3D "lam_bh", + [__builtin_ctz(HWCAP_LOONGARCH_FPU )] =3D "fpu", + [__builtin_ctz(HWCAP_LOONGARCH_LSX )] =3D "lsx", + [__builtin_ctz(HWCAP_LOONGARCH_LASX )] =3D "lasx", + [__builtin_ctz(HWCAP_LOONGARCH_CRC32 )] =3D "crc32", + [__builtin_ctz(HWCAP_LOONGARCH_COMPLEX )] =3D "complex", + [__builtin_ctz(HWCAP_LOONGARCH_CRYPTO )] =3D "crypto", + [__builtin_ctz(HWCAP_LOONGARCH_LVZ )] =3D "lvz", + [__builtin_ctz(HWCAP_LOONGARCH_LBT_X86 )] =3D "lbt_x86", + [__builtin_ctz(HWCAP_LOONGARCH_LBT_ARM )] =3D "lbt_arm", + [__builtin_ctz(HWCAP_LOONGARCH_LBT_MIPS)] =3D "lbt_mips", + }; + + return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL; +} abi_ulong get_elf_hwcap(CPUState *cs) { LoongArchCPU *cpu =3D 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 =3D get_elf_hwcap(env_cpu(cpu_env)); + uint32_t prid, ser_id, pabits, vabits, i, n, num_cpus; + bool is_64bit =3D is_la64(cpu_env); + const char *hwcap_str; + struct timespec res; + double freq_mhz; + +#if TARGET_LONG_BITS =3D=3D 32 + pabits =3D 31; + vabits =3D 31; +#else + pabits =3D FIELD_EX32(cpu_env->cpucfg[1], CPUCFG1, PALEN); + vabits =3D FIELD_EX32(cpu_env->cpucfg[1], CPUCFG1, VALEN); +#endif + + if (clock_getres(CLOCK_REALTIME, &res) =3D=3D -1) { + res.tv_nsec =3D 1; + } + freq_mhz =3D 1000.0 / res.tv_nsec; + + ser_id =3D FIELD_EX32(cpu_env->cpucfg[0], CPUCFG0, SERID); + prid =3D FIELD_EX32(cpu_env->cpucfg[0], CPUCFG0, PRID); + + dprintf(fd, "system type\t\t: generic-loongson-machine\n"); + + num_cpus =3D sysconf(_SC_NPROCESSORS_ONLN); + for (n =3D 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 =3D=3D PRID_SERIES_LA464 ? "LA464" : + ser_id =3D=3D 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 =3D 0; i < sizeof(elf_hwcap) * 8; i++) { + if (!(elf_hwcap & (1 << i))) { + continue; + } + hwcap_str =3D 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 */ --=20 2.54.0