From nobody Mon Dec 1 23:33:40 2025 Received: from smtpbguseast2.qq.com (smtpbguseast2.qq.com [54.204.34.130]) (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 0D14430C350 for ; Wed, 26 Nov 2025 02:37:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.204.34.130 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764124647; cv=none; b=CeKLVTx3wG1zh7KliHsB42F8Hib9SnaVGHmy1B7HoUtcJXahD4KwUZ2CmJxbRwmiJ/+4r1LAiPyvZgEUXYAZu/UOpRWKK/dWr5ZkYxsUxJtdHPbxF1FvMwmX7C9oeLrXVy3k8XYb4VZYNd1L/r1Qi+APXxUepDWopYQyU0hNjLw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764124647; c=relaxed/simple; bh=dyyanO4xf46BrgF90hRvJfjaltHLB731vnGFPzKsTBk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=LqDfupGLLd5oyQWBSVkLkNfpnpiuUJAENcfGmIualnbB7i9+aFFPYurZCIevOS39af1xfLwlAZepwgH8BsuHEA91OcDWumx2znwgd7j61ZaHMwfor4oLpm5azy4ZIgtB9uneEqJetMoDHHykczz9WahjK04bJ8Vo/bvldD1zPR8= 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=MIwL8Wuo; arc=none smtp.client-ip=54.204.34.130 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="MIwL8Wuo" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1764124619; bh=snyP4dIJhVEfL1cF1W/gxNri0KGx1YAG3Ccl2YjNfMY=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=MIwL8WuoTxK+RAyiVrNHD1cui5ba0J54TyL4XTZ64P9rgHlpBlaJhMpioA59t/3rn ImpsHBV2SC3rIUdz2+1AU/XbFZxCfsKBoAlPeYO9T6/d9i2dngJnAwk8LCNe8UVbqr IkXSd7lsSPwTcATFsWTJfKQRpqKzQFoQq8gaGFrY= X-QQ-mid: zesmtpgz8t1764124614t217512b7 X-QQ-Originating-IP: Q63GKU/1qu4B8wEpnDEqLyCnEcTYnImTKca4hRmrqk8= Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 26 Nov 2025 10:36:52 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 14159429218752448158 EX-QQ-RecipientCnt: 5 From: Qiang Ma To: chenhuacai@kernel.org, kernel@xen0n.name Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, Qiang Ma Subject: [PATCH] LoongArch: Correct the calculation logic of thread_count Date: Wed, 26 Nov 2025 10:36:31 +0800 Message-Id: <20251126023631.3143434-1-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: zesmtpgz:uniontech.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: Oe8iwmjPdG65O1tnfD9PUZWdcqz5dY0Dn1ISGyH6fZELtB1I7baZQ1bU aJk8L+rFHTDQAvnFefqDFH5lPhOrSTrJkMhrBLdh7/JND1Jdcitkh3TbQqTa+VhCQQ10W0T iQ0++PrlI/+vJnk1IZsvK5XbHFas2MFayizVAhKOc/LmoiA0Sl4iwQtqdeZxzFM2L6Z5Jgx WMMoAgTVgTqvEEd+Z16iPUSieZHm0/YGT6hJTxxPT2d+HmfdyJNlIZkqveoZ6Z/+2Vz8CoF zZLwqX5hhh8+2YVFrE7PjbEbsVgXDvoDhr9jDMqicKMxI3CR0TS82KxSuLAKPZ+s/k4PaA9 vNF/Xw/YjvbFjhaoSqs+VYFXXcZV/ssXUumBaYaeaCYWFSALqY+qWBaHSKdQvQOe/u5DWMA xPAR3vBIkj+4ruSnVTelTCi5UWvOP3jdJjdPEq5w8gtl2yxgqflPkvkjWxWXq9nCFrD4Xs/ wDT6EbLWMD9Vj0KK6rKqocd3QLyiyJ93NMHE8r2hGIivg6gMDhDMDSuqeavd5u+ch7N7dQu EcGaArBqeqjd6KpE6PBxZspjdIyciy6TAdrBqDwfiHsUaaT6r/1THteN4YQO8Vv3XjvISd/ 7iEWx1hQX0gHdlZrQxZ8f7MmUs8p+txoe+tlZ+Q+FMQiiGE2Sv2eMTzqFn5goo/RRH1Xw3d cl2dFJCvsoOgxsez8B2niFPgDZiZcIvomSCtQ7cJOS5bB/r2QG9NQKh8Vv7m1e5vYu5VAh3 I4oNzkz5UXIATVmd9GtJLTOnrf1VGNCYeb/ZZb59k8Y34k+wdxFUHxOKNINHqTuAbrj0pJh iXbyeqsgKVI+48R3NTw2GTqLMY23q2LvT3r5mdPhAYOWb2DjbYbL7AWDmTIblIGGzVNZjKi Uq6ANRBsDMV1kGuoAUhpyJ7xQGj24V5xYWW1RyuYNbBZZgT0QWkxD0/Bnr/mhTZjnnG4JeS eYOs1YUAjwr/wx/C2NmWDuFoWV2ZQe02Dq6LpopVvirr9Pp59pOolGNEREwEJYn4dnLYtzG Za63VfNsTXGMclfZRhM16wNk9n++k= X-QQ-XMRINFO: OD9hHCdaPRBwq3WW+NvGbIU= 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..760f5ce44384 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; + u16 thread_count2; =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); + thread_count2 =3D *(u16 *)(dmi_data + SMBIOS_THREAD_PACKAGE_2_OFFSET); + if (thread_count !=3D 0) + loongson_sysconf.cores_per_package =3D dm->length >=3D 0x30 && thread_co= unt =3D=3D 0xFF ? + thread_count2 : thread_count; =20 pr_info("CpuClock =3D %llu\n", cpu_clock_freq); } --=20 2.20.1