From nobody Mon Dec 1 22:03:44 2025 Received: from smtpbgsg2.qq.com (smtpbgsg2.qq.com [54.254.200.128]) (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 53966231858 for ; Thu, 27 Nov 2025 10:21:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.254.200.128 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764238888; cv=none; b=P8MPoNKnEbYLaRdrj7qi9MGqzx7bTkklQHdjR4Q6OikSAqv7APVbgd7XVVgto449Yr414mRBowDxAIPsuXBrbtnjIWEwIT0RCpb6g8eVrq3E2OEdKCMQ3PnVAFjKfd80UkRS8zFBWQp2YRTovChvOBSNBvek5lxZNfmOFNwI4Lo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764238888; c=relaxed/simple; bh=rTtiVbHcL4TDLSJhQbbgDII7Sg4nmInIRO3vYuuJqQ4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=GfQoOObQvFiCALPPXgRIohGdVKwqL+GHNQV50GTEAKV3z4x3Ps3l6z5yjnopn2c97h9hN+MAjfdbNNFbniPQ9KRb5JheYtm+k4XB1y29l5UvsknHSFsDXaEdsfIzKj0QxX0/7e1x84Us7dz0pvHkWSBuQ5lMwB7j55syG++SsjQ= 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=AIRrNB/T; arc=none smtp.client-ip=54.254.200.128 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="AIRrNB/T" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1764238850; bh=Ym5BSMc8jlSE9Ar0o4L61EHrYe+/qARB2zmvb0gWb0A=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=AIRrNB/T/8wdQYPGPtMKEg7XeomTN82C5fqT9lUkNpIOv2/qOjBYnlqo213xwOmTs J02C05UhN81W4VTpsnNmViaWN2IqW5jxg28vQoQtJhaKO30/tSaLpQNW7AtucC22T1 ksLDdgB0E0/im9rr//eZ1++PHp3N2PPYnfNfUjKM= X-QQ-mid: zesmtpsz3t1764238845tb51712f5 X-QQ-Originating-IP: T7eLNdh2Gt0MC59GBQs/rQ5F6izB+/yo+5fwcH0+VSU= Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 27 Nov 2025 18:20:43 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 14232503937551174294 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 v3] LoongArch: Correct the calculation logic of thread_count Date: Thu, 27 Nov 2025 18:19:46 +0800 Message-Id: <20251127101946.3531069-1-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: zesmtpsz:uniontech.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: MX+1SEN3H+wAu8MF6d4YTwNHDHUfLKf4820ZI0VCNb/AZ9iCw73uAADH CB6UoVz+76zbP6wDgF8A4Asi+pKgsKaLoDSD74zfxOkXYc+8FVGnZTkw27Rhpw8SL0/uyyM vqxqkHsTkCAwEU14xVGOUKFQSyHDSXKjqyeE3ciYDCRcMn718bltdnKSxDP4trSEwHT/xUt Vt+ARWye1EnPsKubiRcLlooGqJh/EmmAOgsJqsM4OBBGwGQJiSk5zQIQT0Xd7wkoxtuMt09 a7jX8TKEqoYPXg5HjaL8+XGCCVEpG33szL78716jlRka1hfVPKQRojiim0bdfY2o/2XvHGY h7+xGTUjjU2BbBGVyA55JF/mG/2D6zg9zZuN02pEhrFncez3peD4DP/7fWv22OoVKWWXwSx 8olcrGQRG+ESbTYpvpHkV+IvX+OYAKzG+jhY4Mv5t+wwWxit2qbAZ66EnOcbD2qpdDPvlJx W6AqQTFMPc/n/TqZS4fs794Bq5FDuRW7QtyE+Hp+v3jQjbkd2YVVk1AcR4k95c2QCnuvCsp 9NXBqKnbVuWgI2pZXE3UZbWEhJWESDfy4Ha9AuPgUCOHl44Cnd1+sdEKnCrdBgROLaTOZz1 qOcg+BgGszreLScf+eWz0MQPVejcOzl4XcYSP+Q/wqRR21Z7QxDxX0U86fsTuKwixyXkyHi b4FitOIgxeHls4lw/Ox3Zt0TDDk5Gckf04ocsl87OCfnX0e4NsKC2Mp62k9TQQmfXUzl3GP YNvhWwyyb2wOa9/ySXvHpfffv089hUtunr9clfPo1as9N9I/gSPf1QkuuLM2+gRBl60bKDO kkxvTAkr7jI1O7RoY9PSM1w2OCSDj2oOrQw8Wi6dKafRQqex+rblpGFJpotUJf8oqD4JF5+ LB7i0KeK5CpUJ5/CFRgEErb39FxsK7w+da8iUGLAoTi5I3MAS6VlhrDzO2QiGtT0xmHWG0K 8GEsqK6p0Ch3yYDVJzhiA2lGSCqCPvMt12Dfgr/n6ztptRMzTHEBVogAYclJ4sp2NPGhylO luINYBJ77RS95WqGGDy0rJxrbufq4ZiwrKuxM85pXqcPpYQDUabekENZwc0Uk= X-QQ-XMRINFO: MPJ6Tf5t3I/ycC2BItcBVIA= 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 | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c index 25a87378e48e..eb6e3ac27436 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; @@ -126,7 +127,12 @@ static void __init parse_cpu_table(const struct dmi_he= ader *dm) 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); + loongson_sysconf.cores_per_package =3D *(u8 *)(dmi_data + SMBIOS_THREAD_P= ACKAGE_OFFSET); + if (dm->length >=3D 0x30 && loongson_sysconf.cores_per_package =3D=3D 0xf= f) { + /* SMBIOS 3.0+ has ThreadCount2 for more than 255 threads */ + loongson_sysconf.cores_per_package =3D + *(u16 *)(dmi_data + SMBIOS_THREAD_PACKAGE_2_OFFSET); + } =20 pr_info("CpuClock =3D %llu\n", cpu_clock_freq); } --=20 2.20.1