From patchwork Thu Apr 25 17:13:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Neri X-Patchwork-Id: 13643588 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 769AA149E0E; Thu, 25 Apr 2024 17:06:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714064798; cv=none; b=olZA54SnQUW8DHPsecUtzSRUdEkuVvPckHSL8ot/GOSG1xri7zQgk+i7ZoyYOeRFaiwQ36Xk5Qc7JhDFqd+w9/u5eHQuVD4GAE8kPcrirXcK5mYUsiIJRGV+q7S8ggHOK5rAhyuPkwVNjdhzdIw669fQs1jTWm4/lhr8GMqy53k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714064798; c=relaxed/simple; bh=QulXFTzwZLbOFa0Os9JFQ5gDk74pSgjx91XU814wSuQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=gJyQKu7gVW4Q9Pelz8WBodOp0EZpuCbGzgqMm24ZyA6BCaRbq5BTvBnw5hBwuh0/L/Rb5HDr1ltLjR3JwyRNPP4OkzCJG2XEujyDzJLATr0Acl1Y0xMm1vM9bxmob7zmQ0GjH1Fway1CUSI7syUX713HJ4qlgoXO1L6at0YsQXo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=LtRXTy5V; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="LtRXTy5V" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1714064797; x=1745600797; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=QulXFTzwZLbOFa0Os9JFQ5gDk74pSgjx91XU814wSuQ=; b=LtRXTy5VrCOfaw1H0desRfef8RVuwhbJ7E0Ts7sxamFRQXfCDgGonUmR 6uHXFFPSs3JZDNccD8tLaiaiSRmCi+ZRrQgfcKoFo07b38MUT+HV+pPZP Aciis2ShRa/iop/UaNN1etklX/ahUm+CJKFdFN4w9n3DiPzkp/wJHiFMx ybSyzUHxxbjvc01XNzbSDIuWvzVYHOSfBb3JaA7fAaLlV876MHZUyfVeZ GYF88+zS833qfPPhLuIiq0UtREmfHpYVKEStNF5XUoHtrdMTkqJdHEEwb /7pVCdlM6hs1/yOChJWlNdRIp8zwLgFqvDSyRCxJh3jtZWh/HKQkER5xp g==; X-CSE-ConnectionGUID: z/x0mv3cT2yL8qEwWImymg== X-CSE-MsgGUID: 5cWzOnZIR2y9bklq1S204Q== X-IronPort-AV: E=McAfee;i="6600,9927,11055"; a="27225301" X-IronPort-AV: E=Sophos;i="6.07,230,1708416000"; d="scan'208";a="27225301" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Apr 2024 10:06:35 -0700 X-CSE-ConnectionGUID: eKAQbXk3RQuc9FrhWHJFMw== X-CSE-MsgGUID: emugg8T8RLCSXv1GRCMEVA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,230,1708416000"; d="scan'208";a="25548557" Received: from ranerica-svr.sc.intel.com ([172.25.110.23]) by orviesa006.jf.intel.com with ESMTP; 25 Apr 2024 10:06:34 -0700 From: Ricardo Neri To: "Rafael J. Wysocki" , Zhang Rui , Jean Delvare , Guenter Roeck Cc: Srinivas Pandruvada , Lukasz Luba , Daniel Lezcano , linux-pm@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Neri Subject: [PATCH v2 1/3] thermal: intel: intel_tcc: Add model checks for temperature registers Date: Thu, 25 Apr 2024 10:13:09 -0700 Message-Id: <20240425171311.19519-2-ricardo.neri-calderon@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240425171311.19519-1-ricardo.neri-calderon@linux.intel.com> References: <20240425171311.19519-1-ricardo.neri-calderon@linux.intel.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The register MSR_TEMPERATURE_TARGET is not architectural. Its fields may be defined differently for each processor model. TCC_OFFSET is an example of such case. Despite being specified as architectural, the registers IA32_[PACKAGE]_ THERM_STATUS have become model-specific: in recent processors, the digital temperature readout uses bits [23:16] whereas the Intel Software Developer's manual specifies bits [22:16]. Create an array of processor models and their bitmasks for TCC_OFFSET and the digital temperature readout fields. Do not include recent processors. Instead, use the bitmasks of these recent processors as default. Use these model-specific bitmasks when reading TCC_OFFSET or the temperature sensors. Initialize a model-specific data structure during subsys_initcall() to have it ready when thermal drivers are loaded. Expose the new interface intel_tcc_get_offset_mask(). The intel_tcc_cooling driver will use it. Signed-off-by: Ricardo Neri Reviewed-by: Zhang Rui --- Cc: Daniel Lezcano Cc: Lukasz Luba Cc: Srinivas Pandruvada Cc: linux-hwmon@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org # v6.7+ --- Changes since v1: * Renamed TCC_FAM6_MODEL_TEMP_MASKS as TCC_MODEL_TEMP_MASKS. (Rui) * Renamed get_tcc_offset_mask() as intel_tcc_get_offset_mask(). (Rui) * Do not export intel_tcc_get_temp_mask() as it is no longer used outside intel_tcc.c * Dropped stub functions for digital temperature readout and TCC offset. They are not needed as users select CONFIG_INTEL_TCC. --- drivers/thermal/intel/intel_tcc.c | 177 +++++++++++++++++++++++++++++- include/linux/intel_tcc.h | 1 + 2 files changed, 173 insertions(+), 5 deletions(-) diff --git a/drivers/thermal/intel/intel_tcc.c b/drivers/thermal/intel/intel_tcc.c index 5e8b7f34b395..9943c43c06df 100644 --- a/drivers/thermal/intel/intel_tcc.c +++ b/drivers/thermal/intel/intel_tcc.c @@ -6,8 +6,170 @@ #include #include +#include +#include #include +/** + * struct temp_masks - Bitmasks for temperature readings + * @tcc_offset: TCC offset in MSR_TEMPERATURE_TARGET + * @digital_readout: Digital readout in MSR_IA32_THERM_STATUS + * @pkg_digital_readout: Digital readout in MSR_IA32_PACKAGE_THERM_STATUS + * + * Bitmasks to extract the fields of the MSR_TEMPERATURE and IA32_[PACKAGE]_ + * THERM_STATUS registers for different processor models. + * + * The bitmask of TjMax is not included in this structure. It is always 0xff. + */ +struct temp_masks { + u32 tcc_offset; + u32 digital_readout; + u32 pkg_digital_readout; +}; + +#define TCC_MODEL_TEMP_MASKS(model, _tcc_offset, _digital_readout, \ + _pkg_digital_readout) \ + static const struct temp_masks temp_##model __initconst = { \ + .tcc_offset = _tcc_offset, \ + .digital_readout = _digital_readout, \ + .pkg_digital_readout = _pkg_digital_readout \ + } + +TCC_MODEL_TEMP_MASKS(nehalem, 0, 0x7f, 0x7f); +TCC_MODEL_TEMP_MASKS(haswell_x, 0xf, 0x7f, 0x7f); +TCC_MODEL_TEMP_MASKS(broadwell, 0x3f, 0x7f, 0x7f); +TCC_MODEL_TEMP_MASKS(goldmont, 0x7f, 0x7f, 0x7f); +TCC_MODEL_TEMP_MASKS(tigerlake, 0x3f, 0xff, 0xff); +TCC_MODEL_TEMP_MASKS(sapphirerapids, 0x3f, 0x7f, 0xff); + +/* Use these masks for processors not included in @tcc_cpu_ids. */ +static struct temp_masks intel_tcc_temp_masks __ro_after_init = { + .tcc_offset = 0x7f, + .digital_readout = 0xff, + .pkg_digital_readout = 0xff, +}; + +static const struct x86_cpu_id intel_tcc_cpu_ids[] __initconst = { + X86_MATCH_INTEL_FAM6_MODEL(CORE_YONAH, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(CORE2_MEROM, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(CORE2_MEROM_L, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(CORE2_PENRYN, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(CORE2_DUNNINGTON, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(NEHALEM, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_G, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EP, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EX, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(WESTMERE, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(WESTMERE_EP, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(WESTMERE_EX, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE_X, &temp_haswell_x), + X86_MATCH_INTEL_FAM6_MODEL(HASWELL, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(HASWELL_X, &temp_haswell_x), + X86_MATCH_INTEL_FAM6_MODEL(HASWELL_L, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(HASWELL_G, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(BROADWELL, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_G, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X, &temp_haswell_x), + X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_D, &temp_haswell_x), + X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_X, &temp_haswell_x), + X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(CANNONLAKE_L, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_L, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_NNPI, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X, &temp_sapphirerapids), + X86_MATCH_INTEL_FAM6_MODEL(EMERALDRAPIDS_X, &temp_sapphirerapids), + X86_MATCH_INTEL_FAM6_MODEL(LAKEFIELD, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_P, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_S, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_BONNELL, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_BONNELL_MID, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_SALTWELL, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_SALTWELL_MID, &temp_nehalem), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_D, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_MID, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT_MID, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT_NP, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, &temp_goldmont), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, &temp_goldmont), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS, &temp_goldmont), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_D, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_L, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_GRACEMONT, &temp_tigerlake), + X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL, &temp_broadwell), + X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM, &temp_broadwell), + {} +}; + +static int __init intel_tcc_init(void) +{ + const struct x86_cpu_id *id; + + id = x86_match_cpu(intel_tcc_cpu_ids); + if (id) + memcpy(&intel_tcc_temp_masks, (const void *)id->driver_data, + sizeof(intel_tcc_temp_masks)); + + return 0; +} +/* + * Use subsys_initcall to ensure temperature bitmasks are initialized before + * the drivers that use this library. + */ +subsys_initcall(intel_tcc_init); + +/** + * intel_tcc_get_offset_mask() - Returns the bitmask to read TCC offset + * + * Get the model-specific bitmask to extract TCC_OFFSET from the MSR + * TEMPERATURE_TARGET register. If the mask is 0, it means the processor does + * not support TCC offset. + * + * Return: The model-specific bitmask for TCC offset. + */ +u32 intel_tcc_get_offset_mask(void) +{ + return intel_tcc_temp_masks.tcc_offset; +} +EXPORT_SYMBOL_NS(intel_tcc_get_offset_mask, INTEL_TCC); + +/** + * get_temp_mask() - Returns the model-specific bitmask for temperature + * + * @pkg: true: Package Thermal Sensor. false: Core Thermal Sensor. + * + * Get the model-specific bitmask to extract the temperature reading from the + * MSR_IA32_[PACKAGE]_THERM_STATUS register. + * + * Callers must check if the thermal status registers are supported. + * + * Return: The model-specific bitmask for temperature reading + */ +static u32 get_temp_mask(bool pkg) +{ + return pkg ? intel_tcc_temp_masks.pkg_digital_readout : + intel_tcc_temp_masks.digital_readout; +} + /** * intel_tcc_get_tjmax() - returns the default TCC activation Temperature * @cpu: cpu that the MSR should be run on, nagative value means any cpu. @@ -56,7 +218,7 @@ int intel_tcc_get_offset(int cpu) if (err) return err; - return (low >> 24) & 0x3f; + return (low >> 24) & intel_tcc_temp_masks.tcc_offset; } EXPORT_SYMBOL_NS_GPL(intel_tcc_get_offset, INTEL_TCC); @@ -76,7 +238,10 @@ int intel_tcc_set_offset(int cpu, int offset) u32 low, high; int err; - if (offset < 0 || offset > 0x3f) + if (!intel_tcc_temp_masks.tcc_offset) + return -ENODEV; + + if (offset < 0 || offset > intel_tcc_temp_masks.tcc_offset) return -EINVAL; if (cpu < 0) @@ -90,7 +255,7 @@ int intel_tcc_set_offset(int cpu, int offset) if (low & BIT(31)) return -EPERM; - low &= ~(0x3f << 24); + low &= ~(intel_tcc_temp_masks.tcc_offset << 24); low |= offset << 24; if (cpu < 0) @@ -113,8 +278,8 @@ EXPORT_SYMBOL_NS_GPL(intel_tcc_set_offset, INTEL_TCC); */ 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; + u32 low, high, mask; int tjmax, err; tjmax = intel_tcc_get_tjmax(cpu); @@ -132,7 +297,9 @@ int intel_tcc_get_temp(int cpu, int *temp, bool pkg) if (!(low & BIT(31))) return -ENODATA; - *temp = tjmax - ((low >> 16) & 0x7f); + mask = get_temp_mask(pkg); + + *temp = tjmax - ((low >> 16) & mask); return 0; } diff --git a/include/linux/intel_tcc.h b/include/linux/intel_tcc.h index 8ff8eabb4a98..fa788817acfc 100644 --- a/include/linux/intel_tcc.h +++ b/include/linux/intel_tcc.h @@ -14,5 +14,6 @@ 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, int *temp, bool pkg); +u32 intel_tcc_get_offset_mask(void); #endif /* __INTEL_TCC_H__ */