From nobody Mon Feb 9 19:04:48 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 01B5C25CC59; Tue, 22 Apr 2025 21:34:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745357692; cv=none; b=q1pFRPw3kKXdxp7vEwYle9sgMDPeKve5k8BkkSv/PWSA77qGfmnnpM6rKFPM499eSMCmyvUfcqT1QnCKCF7NFiCRUyp5o4aNweg56WD6GxK5ZOVpV3gUrz7BzEc+4MABNgnOdB67v8PWYi3upkJ8VYpiC8lcQIXPPcSs5vt/uIY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745357692; c=relaxed/simple; bh=Lsz0SmSLHBuNAOhBY+Z7GEFPJPrtXYFlVmulYacxyns=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GvpHmnaEQst2lWd9zpZi+a1jgDAzY+SnfsohTwl3gzqr4u/QfJuj75HH/LYewbxus1q3/l07DsUIQ2rL8NSblSDjN3CD34Bxlo/kNd4qI0sg9zkrS3iZ5TNv72LSHYT4BNJO553v7V5or7UgGefBAQrKxBr6AMd/CymnTO50QB4= 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=RpJd7j2w; arc=none smtp.client-ip=192.198.163.19 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="RpJd7j2w" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1745357689; x=1776893689; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Lsz0SmSLHBuNAOhBY+Z7GEFPJPrtXYFlVmulYacxyns=; b=RpJd7j2wfpmDHFy09wSh6MIYglgEaHlSPgNuFyW+BiSx4ZdYHnO8oFLa 8LtsjwP3zd2nPicu4QF9FvuRx+lsflGp25Ud8dWfGuVzZnOByvNwySFkN +xSy135c1XRiPXbUrde1xAcs4QFwVe/vvfpv82RQ3zownutkDW558dLOX +/pjqP4FsSp+DtKQuYU7hRQgMScN4UwV2kRe+bweUeS4LKIf/7Hmnp9mb mN/oYllL1jFeV97sffzNUWdzmEZL3JSaFfuHkW/fVHkN3fiAIh/zE0lDD VlMaW7HI2urRyMukac0KeYHCHYC5OkMG9GUzet8Vmly7E/O7V9JnkuLIw A==; X-CSE-ConnectionGUID: PdHx6LhUSD6cLEXir8jCzg== X-CSE-MsgGUID: II1W1QLqTyyPOjFFf8dgUQ== X-IronPort-AV: E=McAfee;i="6700,10204,11411"; a="46053990" X-IronPort-AV: E=Sophos;i="6.15,232,1739865600"; d="scan'208";a="46053990" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2025 14:34:44 -0700 X-CSE-ConnectionGUID: ZZ/6caK2SeyVT2FnRkQcMg== X-CSE-MsgGUID: LEtV1NOXToucSih3/zmnhQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,232,1739865600"; d="scan'208";a="133070685" Received: from spandruv-desk.jf.intel.com ([10.54.75.16]) by orviesa008.jf.intel.com with ESMTP; 22 Apr 2025 14:34:43 -0700 From: Srinivas Pandruvada To: hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH 3/5] platform/x86/intel: power-domains: Add interface to get Linux die ID Date: Tue, 22 Apr 2025 14:34:25 -0700 Message-ID: <20250422213427.1943328-4-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250422213427.1943328-1-srinivas.pandruvada@linux.intel.com> References: <20250422213427.1943328-1-srinivas.pandruvada@linux.intel.com> 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 Content-Type: text/plain; charset="utf-8" The die ID in the Linux topology sysfs is a logical identifier that differs from the one presented in CPUID leaf 0x1F or via MSR 0x54. Introduce an interface that returns the Linux CPU die ID based on a given package ID and power domain ID. This mapping is stored during the CPU online callback in an array. Signed-off-by: Srinivas Pandruvada --- .../platform/x86/intel/tpmi_power_domains.c | 34 ++++++++++++++++--- .../platform/x86/intel/tpmi_power_domains.h | 1 + 2 files changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/platform/x86/intel/tpmi_power_domains.c b/drivers/plat= form/x86/intel/tpmi_power_domains.c index 2f01cd22a6ee..9aaebd74a2af 100644 --- a/drivers/platform/x86/intel/tpmi_power_domains.c +++ b/drivers/platform/x86/intel/tpmi_power_domains.c @@ -74,6 +74,8 @@ static enum cpuhp_state tpmi_hp_state __read_mostly; =20 static cpumask_t *tpmi_power_domain_mask; =20 +static u16 *domain_die_map; + /* Lock to protect tpmi_power_domain_mask and tpmi_cpu_hash */ static DEFINE_MUTEX(tpmi_lock); =20 @@ -152,6 +154,15 @@ cpumask_t *tpmi_get_power_domain_mask(int cpu_no) } EXPORT_SYMBOL_NS_GPL(tpmi_get_power_domain_mask, "INTEL_TPMI_POWER_DOMAIN"= ); =20 +int tpmi_get_linux_die_id(int pkg_id, int domain_id) +{ + if (pkg_id >=3D topology_max_packages() || domain_id >=3D MAX_POWER_DOMAI= NS) + return -EINVAL; + + return domain_die_map[pkg_id * MAX_POWER_DOMAINS + domain_id]; +} +EXPORT_SYMBOL_NS_GPL(tpmi_get_linux_die_id, "INTEL_TPMI_POWER_DOMAIN"); + static int tpmi_get_logical_id(unsigned int cpu, struct tpmi_cpu_info *inf= o) { u64 data; @@ -189,6 +200,9 @@ static int tpmi_cpu_online(unsigned int cpu) cpumask_set_cpu(cpu, &tpmi_power_domain_mask[index]); hash_add(tpmi_cpu_hash, &info->hnode, info->punit_core_id); =20 + domain_die_map[info->pkg_id * MAX_POWER_DOMAINS + info->punit_domain_id] = =3D + topology_die_id(cpu); + return 0; } =20 @@ -212,17 +226,28 @@ static int __init tpmi_init(void) if (!tpmi_power_domain_mask) return -ENOMEM; =20 + domain_die_map =3D kcalloc(size_mul(topology_max_packages(), MAX_POWER_DO= MAINS), + sizeof(*domain_die_map), GFP_KERNEL); + if (!domain_die_map) + goto free_domain_mask; + ret =3D cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "platform/x86/tpmi_power_domains:online", tpmi_cpu_online, NULL); - if (ret < 0) { - kfree(tpmi_power_domain_mask); - return ret; - } + if (ret < 0) + goto free_domain_map; =20 tpmi_hp_state =3D ret; =20 return 0; + +free_domain_map: + kfree(domain_die_map); + +free_domain_mask: + kfree(tpmi_power_domain_mask); + + return ret; } module_init(tpmi_init) =20 @@ -230,6 +255,7 @@ static void __exit tpmi_exit(void) { cpuhp_remove_state(tpmi_hp_state); kfree(tpmi_power_domain_mask); + kfree(domain_die_map); } module_exit(tpmi_exit) =20 diff --git a/drivers/platform/x86/intel/tpmi_power_domains.h b/drivers/plat= form/x86/intel/tpmi_power_domains.h index e35750dd9273..2fd0dd7afbd2 100644 --- a/drivers/platform/x86/intel/tpmi_power_domains.h +++ b/drivers/platform/x86/intel/tpmi_power_domains.h @@ -14,5 +14,6 @@ int tpmi_get_linux_cpu_number(int package_id, int die_id,= int punit_core_id); int tpmi_get_punit_core_number(int cpu_no); int tpmi_get_power_domain_id(int cpu_no); cpumask_t *tpmi_get_power_domain_mask(int cpu_no); +int tpmi_get_linux_die_id(int pkg_id, int domain_id); =20 #endif --=20 2.48.1