From nobody Mon Dec 1 22:03:53 2025 Received: from smtpbguseast1.qq.com (smtpbguseast1.qq.com [54.204.34.129]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B463D225416 for ; Thu, 27 Nov 2025 03:33:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.204.34.129 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764214386; cv=none; b=FlADdmztMIo2aaYnsUqlVJMdQx0qFBsCppWIQrrZU2t2vxIsEsfqBkpsvQWlpiATYmQ8AHmA7XEfVQ3C1uEucsEMJDj7X/R7cdyQ51PVSIwIX8fY0L36G4HoLR7D8WFQqQQh9vMcUIVtRHNvIKASk7B4BRlw3dwYGG2tVMXQh2M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764214386; c=relaxed/simple; bh=Jt/SBI7/H0gS6WvYjVl+jJTRYNKzZeiAnbYlCoNuQ60=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XIpXFx40WRVtg4mri8VFDY09u0Mvz047PruV2vi9Pd4qybPGOg+K7pOF68/ORvgviOnhWadY4YI1cDLNcYymDpJyFIJCGbdnO0YM4dQNvvtA4x8DE8Mtv2gKZqs7lYNxgfgdd0sYNBd9IVU49fY4XnBZPPGkLTulYZQ5wbXf+5g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=Eh6jWIny; arc=none smtp.client-ip=54.204.34.129 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="Eh6jWIny" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1764214300; bh=9BbRKEnyGbB+PfTV01qDdALOPwkjwZNJFwux+GH4JZA=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=Eh6jWInykk59q5hZUXWqUeRjqzo4+eeBtf6iqF134XQi+MNHJnu1MPOTA4uInKHJI 08gdteawgMlPPG5V54bJNXyXQA2V+AXnbWc5lZUZdl4aQ8C+aj8w1lj034MbL434/z CRBER1WEsp61sWCx1p+B2gTd//EG/TP1H+YG7+OA= X-QQ-mid: esmtpsz16t1764214295t0ab471b8 X-QQ-Originating-IP: VefeIHbEXynRhZRui6Yv+PCOvCrphcKkEJ34Org98S0= Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 27 Nov 2025 11:31:33 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 12939922369823571880 EX-QQ-RecipientCnt: 6 From: Qiang Ma To: chenhuacai@kernel.org, kernel@xen0n.name, hengqi.chen@gmail.com Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, Qiang Ma Subject: [PATCH v2] LoongArch: Correct the calculation logic of thread_count Date: Thu, 27 Nov 2025 11:31:23 +0800 Message-Id: <20251127033123.3445519-1-maqianga@uniontech.com> X-Mailer: git-send-email 2.20.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-QQ-SENDSIZE: 520 Feedback-ID: esmtpsz:uniontech.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: Nb940SUM1Q7XSUl6C1MTBXceI0PWv5ZHj38JDlGjA76gLJ2F3lTwcx7U CINjNwRGnprTi6PyihE5QA6HewTBlKOlUQzLiMEJgEg9/gsTlovdIJ5Xe9WwklygvrMyFLu nKN5F3mNd3E7WY63KPBRRBifjh1Tg5daLIABhpVvk0d7r4MnW0fQTUEg9ues/I96ebxCmHI yVB2TCgO0Rge+0mafG+g78XdblObzy8248TsCcYt+vzW7Gaw5TRiC5jNhgR4OklOx1JDdKh UJwY6Ovc4cHl0bw8UVAHSZxOU59z2fZDeiExGyjSaVl2PNZk7zPctnpW/ehmAX+JUqYjIiA It+dcdS+eB3brh9lQALg2OOWlXFVb93FVE5px1LnqWlwwNR13IzBe//Y8pGVQCL5A1JwVEq i0RU08tN5xUb/ezUQR3JgtvYv0Uyp3VDYcvDrcMM5gx6kdk/nnfeLr6iBuwqosKFKa+Ufil jp4YE/iNC3nrO/f9h2bhn9nu94nyq9euDbIlqiu5szmkUNYjcuhla2sM6v1JA/vcbyXTF/Q hmyQRQkqaUppZhQvxGIsTtyLTo6ezAcMkwsK24g9j/mQZMtXYV8wBYexrp+CeiE6RPK/cAu IYifVPi0AZzTvaPjxWI+yZxSUseQx5D1lp+1ZjFGN1OMgBx7jRhq0LUX1DMsnWs4Z1bny/5 fsTcKP2irnklxCMwXOCe9BGaHJDgWjL4Mp9WDwJ0RBG+SzckESsqFeX2bSS58uvlniCqrcn uvn3sjqEbc55wVIKyStuqutCPgtHePNKZGifRVa+GaFStB5vcyZO5s1RJdb7iy8/VDd2A0W aJ5yi51JDIpQUFGu+KcxvrVScVXKUcuBTbeko7UujRzYh+/RoPRuEEj6Fok82wELvh7HhCj KFH0KdajnF7qeJze2QLMpibCsQx5totBvX+bGYWb9qCugDbjZNUOQlS7I8i5qyGzdCW6D4e gVbRWRwwnB/JfQdlJ7AZqmG34vwE/j2cIocnSdgDad46vBrpneVF987cjqRvZS1p2YBWoNl dQ4h4dHpnkNym+sc8DEZr0/UFjnleYva7/xJ/4nReNR+3P8J76 X-QQ-XMRINFO: NS+P29fieYNw95Bth2bWPxk= X-QQ-RECHKSPAM: 0 Content-Type: text/plain; charset="utf-8" For thread_count, the current calculation method has a maximum of 255, which may not be sufficient in the future. Therefore, we are correcting it now. Reference: SMBIOS Specification, 7.5 Processor Information (Type 4)[1] [1]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3= .9.0.pdf Signed-off-by: Qiang Ma --- arch/loongarch/kernel/setup.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c index 25a87378e48e..8dd25fc4bd13 100644 --- a/arch/loongarch/kernel/setup.c +++ b/arch/loongarch/kernel/setup.c @@ -56,6 +56,7 @@ #define SMBIOS_FREQLOW_MASK 0xFF #define SMBIOS_CORE_PACKAGE_OFFSET 0x23 #define SMBIOS_THREAD_PACKAGE_OFFSET 0x25 +#define SMBIOS_THREAD_PACKAGE_2_OFFSET 0x2E #define LOONGSON_EFI_ENABLE (1 << 3) =20 unsigned long fw_arg0, fw_arg1, fw_arg2; @@ -120,13 +121,19 @@ static void __init parse_cpu_table(const struct dmi_h= eader *dm) { long freq_temp =3D 0; char *dmi_data =3D (char *)dm; + u8 thread_count; =20 freq_temp =3D ((*(dmi_data + SMBIOS_FREQHIGH_OFFSET) << 8) + ((*(dmi_data + SMBIOS_FREQLOW_OFFSET)) & SMBIOS_FREQLOW_MASK)); cpu_clock_freq =3D freq_temp * 1000000; =20 loongson_sysconf.cpuname =3D (void *)dmi_string_parse(dm, dmi_data[16]); - loongson_sysconf.cores_per_package =3D *(dmi_data + SMBIOS_THREAD_PACKAGE= _OFFSET); + thread_count =3D *(dmi_data + SMBIOS_THREAD_PACKAGE_OFFSET); + if (thread_count !=3D 0) + loongson_sysconf.cores_per_package =3D + dm->length >=3D 0x30 && thread_count =3D=3D 0xFF ? + *(u16 *)(dmi_data + SMBIOS_THREAD_PACKAGE_2_OFFSET) : + thread_count; =20 pr_info("CpuClock =3D %llu\n", cpu_clock_freq); } --=20 2.20.1