From patchwork Tue Feb 6 01:54:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 13546517 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (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 21EE556754; Tue, 6 Feb 2024 01:54:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707184462; cv=none; b=RSw86JvFDFwJlGKJtKlChsRGPsD9I12Pu16Gw52zXf9RE5xrq7ASb9VmUrOsFWfc8j2dzfHA4ayuQFU03dMAm9ahAn6eXgpL/xR49hx/+mTprJRSQknprEJ51bk4h8s+eKmlLgcV6KyfDa2qPxgFX6xdvRU20aN+DlC7hn0oRLc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707184462; c=relaxed/simple; bh=3VD20WQL3xgexpVKiN8NcOlVno2MagYksB604ZIZyvU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=ktkxejuQ8j4OKojek6DmYl8wdG7OIeJfa3tfsNicqA3wpUWkR8hsq4pUC8V7AgJWYfn6u22Ic5Z8uy1ykJWNIUnKJuuB6bEkv6WzuJ+fWUX5j6nuC8F+UCiKruvV6xemuhEA9VYnN3LtVcnHhTosvmd6BBjadbCX4MaJplz0JR0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=LogcS3LB; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="LogcS3LB" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1707184460; x=1738720460; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=3VD20WQL3xgexpVKiN8NcOlVno2MagYksB604ZIZyvU=; b=LogcS3LBTm/+GnOu6TUQQK0m+hqwk9/Iylmxw0DVbNMUPrJBdD0p8Rrn Uepxnur3o9ihhO4DovjTMmSI3kJePS+UwSPX6aGDe6HfZ8AQSgjk/UBCi 6sDRR3eFovEFMr6JnT+yKA6jZdsocpXzjaQEeEXxZ+ByURdxJsFvzcB0c UfBgDZDIkhsMPFpPQyWURbL4Cw0jQKSS00GUh1cWwfbYKPfzn3Z/yuYlA Y/CmxShqxgB8S7Zl6T4kVGxw9kStP6FWj50invJrPkEAFPF8bor0dgmzR TefMyGYIG8rtt65+hvVNf/11kxJQ2hGY/bLE7ltt8PZiGD+X00K4XSStF A==; X-IronPort-AV: E=McAfee;i="6600,9927,10975"; a="12001711" X-IronPort-AV: E=Sophos;i="6.05,245,1701158400"; d="scan'208";a="12001711" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2024 17:54:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,245,1701158400"; d="scan'208";a="1200612" Received: from weizhihu-mobl.ccr.corp.intel.com (HELO rzhang1-mobl7.ccr.corp.intel.com) ([10.254.211.111]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2024 17:54:18 -0800 From: Zhang Rui To: rafael.j.wysocki@intel.com Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, srinivas.pandruvada@intel.com Subject: [PATCH] thermal/intel: Fix intel_tcc_get_temp() to support negative CPU temperature Date: Tue, 6 Feb 2024 09:54:09 +0800 Message-Id: <20240206015409.619127-1-rui.zhang@intel.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 CPU temperature can be negative in some cases. Thus the negative CPU temperature should not be considered as a failure. Fix intel_tcc_get_temp() and its users to support negative CPU temperature. Fixes: a3c1f066e1c5 ("thermal/intel: Introduce Intel TCC library") Signed-off-by: Zhang Rui Reviewed-by: Stanislaw Gruszka --- .../intel/int340x_thermal/processor_thermal_device.c | 8 ++++---- drivers/thermal/intel/intel_tcc.c | 12 ++++++------ drivers/thermal/intel/x86_pkg_temp_thermal.c | 8 ++++---- include/linux/intel_tcc.h | 2 +- 4 files changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c index 649f67fdf345..d75fae7b7ed2 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c @@ -176,14 +176,14 @@ static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone, int *temp) { int cpu; - int curr_temp; + int curr_temp, ret; *temp = 0; for_each_online_cpu(cpu) { - curr_temp = intel_tcc_get_temp(cpu, false); - if (curr_temp < 0) - return curr_temp; + ret = intel_tcc_get_temp(cpu, &curr_temp, false); + if (ret < 0) + return ret; if (!*temp || curr_temp > *temp) *temp = curr_temp; } diff --git a/drivers/thermal/intel/intel_tcc.c b/drivers/thermal/intel/intel_tcc.c index 2e5c741c41ca..5e8b7f34b395 100644 --- a/drivers/thermal/intel/intel_tcc.c +++ b/drivers/thermal/intel/intel_tcc.c @@ -103,18 +103,19 @@ EXPORT_SYMBOL_NS_GPL(intel_tcc_set_offset, INTEL_TCC); /** * intel_tcc_get_temp() - returns the current temperature * @cpu: cpu that the MSR should be run on, nagative value means any cpu. + * @temp: pointer to the memory for saving cpu temperature. * @pkg: true: Package Thermal Sensor. false: Core Thermal Sensor. * * Get the current temperature returned by the CPU core/package level * thermal sensor, in degrees C. * - * Return: Temperature in degrees C on success, negative error code otherwise. + * Return: 0 on success, negative error code otherwise. */ -int intel_tcc_get_temp(int cpu, bool pkg) +int intel_tcc_get_temp(int cpu, int *temp, bool pkg) { u32 low, high; u32 msr = pkg ? MSR_IA32_PACKAGE_THERM_STATUS : MSR_IA32_THERM_STATUS; - int tjmax, temp, err; + int tjmax, err; tjmax = intel_tcc_get_tjmax(cpu); if (tjmax < 0) @@ -131,9 +132,8 @@ int intel_tcc_get_temp(int cpu, bool pkg) if (!(low & BIT(31))) return -ENODATA; - temp = tjmax - ((low >> 16) & 0x7f); + *temp = tjmax - ((low >> 16) & 0x7f); - /* Do not allow negative CPU temperature */ - return temp >= 0 ? temp : -ENODATA; + return 0; } EXPORT_SYMBOL_NS_GPL(intel_tcc_get_temp, INTEL_TCC); diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c index 11a7f8108bbb..61c3d450ee60 100644 --- a/drivers/thermal/intel/x86_pkg_temp_thermal.c +++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c @@ -108,11 +108,11 @@ static struct zone_device *pkg_temp_thermal_get_dev(unsigned int cpu) static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp) { struct zone_device *zonedev = thermal_zone_device_priv(tzd); - int val; + int val, ret; - val = intel_tcc_get_temp(zonedev->cpu, true); - if (val < 0) - return val; + ret = intel_tcc_get_temp(zonedev->cpu, &val, true); + if (ret < 0) + return ret; *temp = val * 1000; pr_debug("sys_get_curr_temp %d\n", *temp); diff --git a/include/linux/intel_tcc.h b/include/linux/intel_tcc.h index f422612c28d6..8ff8eabb4a98 100644 --- a/include/linux/intel_tcc.h +++ b/include/linux/intel_tcc.h @@ -13,6 +13,6 @@ int intel_tcc_get_tjmax(int cpu); int intel_tcc_get_offset(int cpu); int intel_tcc_set_offset(int cpu, int offset); -int intel_tcc_get_temp(int cpu, bool pkg); +int intel_tcc_get_temp(int cpu, int *temp, bool pkg); #endif /* __INTEL_TCC_H__ */