From patchwork Thu Apr 10 22:32:05 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Luck X-Patchwork-Id: 880190 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (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 29D2A204F81; Thu, 10 Apr 2025 22:32:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744324340; cv=none; b=J5jQwHisk6ODGZXJAkzNC1FX9GTtXYgLf8T9IChtgISs80pH9XvYpoWW4qnIgNQ6UOY4BKUIM0Mdgl/owUS9xua9FrfZv7Z8WlBCY26KzAdbugm+GmA8RGD8b1/J5+lNTdmnyDuszzQHoyVODTvVBigPg622iV2pBFTmcHwvjek= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744324340; c=relaxed/simple; bh=L13SWnVs57xGYJxgwdRdph1jOjpiAExjEwjPMTGQvbY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ESBQ0YDvqts76pCy1nY1Sh1hqNUzoY1cQ5C/dM3uBIK+y04F/qO7u8tJCVDed+tt1QpEOB6aOZAdwNz0m6obif/M6s8ZvNa/ukEGVyMysEdx6P/x+bZmhZUabpQlgzpxF01c9kYx9l8yILWvbKZJAvc3f2dp1estj3XKRwvvUbY= 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=CC5pXv0r; arc=none smtp.client-ip=198.175.65.13 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="CC5pXv0r" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1744324339; x=1775860339; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=L13SWnVs57xGYJxgwdRdph1jOjpiAExjEwjPMTGQvbY=; b=CC5pXv0r9SkMnqFif59scprTAIBvlOYMLTlNDOnYR2VGinM8ZZC/sNA0 2AV4XaYXgf5MRoRCnt/Qm2RgHaqT3dXD92aJ4KRBYtllR+Qjp2CdWzNPM sOrYamjQvkwHIFe7htzr47jkR1jTODv7/lEhhdKLCWLwA8SYnGvkMB5Vo xpGIR9bW0v+bxll4UXPrDMjIOUWqxKUz7kl2VNPOnOsRPioLBMtsQdTJO VfYGVIgdlW7OySErPlVrSl7GuaMwrzDqP1B0s3zfuV0U2kxcz0J/Qev6B jP3tXYcTiyF+SURvr55t2y0gmlZN06scXW3G4EEkW7mLvHe73MGwVvIzn w==; X-CSE-ConnectionGUID: 5xMJO57hTh+kwtwv9dFuxA== X-CSE-MsgGUID: adLI8EhNTd6PrBQqPfeekA== X-IronPort-AV: E=McAfee;i="6700,10204,11400"; a="56845632" X-IronPort-AV: E=Sophos;i="6.15,203,1739865600"; d="scan'208";a="56845632" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2025 15:32:17 -0700 X-CSE-ConnectionGUID: pI3RrV+xQjOxcURhMsy7Pw== X-CSE-MsgGUID: LAcaJ0tkQHWmMJCH8X2fRA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,203,1739865600"; d="scan'208";a="128988752" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2025 15:32:16 -0700 From: Tony Luck To: rafael.j.wysocki@intel.com Cc: lenb@kernel.org, Anil Keshavamurthy , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v3 2/4] ACPI/MRRM: Minimal parse of ACPI MRRM table Date: Thu, 10 Apr 2025 15:32:05 -0700 Message-ID: <20250410223207.257722-3-tony.luck@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250410223207.257722-1-tony.luck@intel.com> References: <20250410223207.257722-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The resctrl file system code needs to know how many region tags are supported. Parse the ACPI MRRM table and save the max_mem_region value. Provide a function for resctrl to collect that value. Signed-off-by: Tony Luck --- include/linux/acpi.h | 6 ++++++ drivers/acpi/acpi_mrrm.c | 42 ++++++++++++++++++++++++++++++++++++++++ arch/x86/Kconfig | 1 + drivers/acpi/Kconfig | 3 +++ drivers/acpi/Makefile | 1 + 5 files changed, 53 insertions(+) create mode 100644 drivers/acpi/acpi_mrrm.c diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 3f2e93ed9730..24aa7a0ae272 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -772,6 +772,12 @@ int acpi_get_local_u64_address(acpi_handle handle, u64 *addr); int acpi_get_local_address(acpi_handle handle, u32 *addr); const char *acpi_get_subsystem_id(acpi_handle handle); +#ifdef CONFIG_ACPI_MRRM +int acpi_mrrm_max_mem_region(void); +#else +static inline int acpi_mrrm_max_mem_region(void) { return -ENOENT; } +#endif + #else /* !CONFIG_ACPI */ #define acpi_disabled 1 diff --git a/drivers/acpi/acpi_mrrm.c b/drivers/acpi/acpi_mrrm.c new file mode 100644 index 000000000000..ab8022e58da5 --- /dev/null +++ b/drivers/acpi/acpi_mrrm.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025, Intel Corporation. + * + * Memory Range and Region Mapping (MRRM) structure + */ + +#define pr_fmt(fmt) "acpi/mrrm: " fmt + +#include +#include + +static int max_mem_region = -ENOENT; + +/* Access for use by resctrl file system */ +int acpi_mrrm_max_mem_region(void) +{ + return max_mem_region; +} + +static __init int acpi_parse_mrrm(struct acpi_table_header *table) +{ + struct acpi_table_mrrm *mrrm; + + mrrm = (struct acpi_table_mrrm *)table; + if (!mrrm) + return -ENODEV; + + max_mem_region = mrrm->max_mem_region; + + return 0; +} + +static __init int mrrm_init(void) +{ + int ret; + + ret = acpi_table_parse(ACPI_SIG_MRRM, acpi_parse_mrrm); + + return ret; +} +device_initcall(mrrm_init); diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 4b9f378e05f6..0e43069082df 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -38,6 +38,7 @@ config X86_64 select ARCH_HAS_ELFCORE_COMPAT select ZONE_DMA32 select EXECMEM if DYNAMIC_FTRACE + select ACPI_MRRM if ACPI config FORCE_DYNAMIC_FTRACE def_bool y diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 7f10aa38269d..7bc40c2735ac 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -576,6 +576,9 @@ config ACPI_FFH Enable this feature if you want to set up and install the FFH Address Space handler to handle FFH OpRegion in the firmware. +config ACPI_MRRM + bool + source "drivers/acpi/pmic/Kconfig" config ACPI_VIOT diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 797070fc9a3f..d1b0affb844f 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -66,6 +66,7 @@ acpi-$(CONFIG_ACPI_WATCHDOG) += acpi_watchdog.o acpi-$(CONFIG_ACPI_PRMT) += prmt.o acpi-$(CONFIG_ACPI_PCC) += acpi_pcc.o acpi-$(CONFIG_ACPI_FFH) += acpi_ffh.o +acpi-$(CONFIG_ACPI_MRRM) += acpi_mrrm.o # Address translation acpi-$(CONFIG_ACPI_ADXL) += acpi_adxl.o