From patchwork Mon May 5 17:38:17 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Luck, Tony" X-Patchwork-Id: 887521 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 ED7C5267B9F; Mon, 5 May 2025 17:38:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746466711; cv=none; b=AJ+T+SQC1EvLsfkj9L/dnz/DvvGOfeJUU+mKKQ8+70QtpfJ6J9PItoS2HGxPZ9eALMx0aphvQhPmQo4Yqi7F9ieJKqDd669QAKbJ0mb3bUebDpEjxbXZ9ONg8jM9ATJ2ZysndJMI61QKms/gNCPSMCg0yT7D0eGfOvaDi+jzBDc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746466711; c=relaxed/simple; bh=41mM4CeORGI8LL+e/0a3kHADBGZX0dr9szgl004zu90=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D8GwJx2Pi4b4IPbaNKMR9LObvxTCVYuI8hRujPW6OFE5cJWgRkKtLmy0Fq1kDMuiS8DMVybpgvbk8/s50rzgXAwZxcEOegmJX/plIhnB9GBm5CcjDvO6rG8ilXhuZ62REr17EH4/x2svj6WNyV/wmYpXC8yeRrdoVZwOY3rryK4= 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=cRtdpktA; arc=none smtp.client-ip=192.198.163.17 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="cRtdpktA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1746466710; x=1778002710; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=41mM4CeORGI8LL+e/0a3kHADBGZX0dr9szgl004zu90=; b=cRtdpktA5nfybYBV4fk7RwoKA86FpnGb10HNNHH+9aoIwlS3VV5O2EL0 NS02/MZpdCrhD8Vzf32lAX9sMmibZGVa0wrf1Bx3bClT0Se3iQKnQQfkm oO45WoCvLpjgL+2hSgBKC70G75ozV+Q5qfGig5cRRJtZ9K3qqLgWvCWh+ hC2f4VXanIdE95QYRTjAM3mjfBi9uP1sb3hh/D8ktSSiPPUHfOFDUccc5 kKt4wTtU2BDOdsEOygNf+uYLvyTgCrH6UZMzSO7rZkxzmkTVCrb6KN/VV 0SIQ+jus+wCVJsdI4uexGXSqp3Z0G2wOLu/Fjccd35RUEU++xIH3d2Dgt w==; X-CSE-ConnectionGUID: kzr9ms/3RSGU5hCivcejTQ== X-CSE-MsgGUID: zR+cm7HaQpeytHV/YMG4Jg== X-IronPort-AV: E=McAfee;i="6700,10204,11424"; a="47991515" X-IronPort-AV: E=Sophos;i="6.15,264,1739865600"; d="scan'208";a="47991515" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2025 10:38:27 -0700 X-CSE-ConnectionGUID: ZzpzMPuURhmahaMeavlM8g== X-CSE-MsgGUID: X733MOeWTcGpLVCis5/v0g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,264,1739865600"; d="scan'208";a="140092226" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2025 10:38:27 -0700 From: Tony Luck To: rafael@kernel.org Cc: lenb@kernel.org, Anil Keshavamurthy , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v5 1/3] ACPI/MRRM: Minimal parse of ACPI MRRM table Date: Mon, 5 May 2025 10:38:17 -0700 Message-ID: <20250505173819.419271-2-tony.luck@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250505173819.419271-1-tony.luck@intel.com> References: <20250505173819.419271-1-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 | 9 +++++++++ drivers/acpi/acpi_mrrm.c | 42 ++++++++++++++++++++++++++++++++++++++++ arch/x86/Kconfig | 1 + drivers/acpi/Kconfig | 3 +++ drivers/acpi/Makefile | 1 + 5 files changed, 56 insertions(+) create mode 100644 drivers/acpi/acpi_mrrm.c diff --git a/include/linux/acpi.h b/include/linux/acpi.h index fc372bbaa547..f2d8579de539 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -772,6 +772,10 @@ 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); +#endif + #else /* !CONFIG_ACPI */ #define acpi_disabled 1 @@ -1092,6 +1096,11 @@ static inline acpi_handle acpi_get_processor_handle(int cpu) return NULL; } +static inline int acpi_mrrm_max_mem_region(void) +{ + return -ENOENT; +} + #endif /* !CONFIG_ACPI */ #ifdef CONFIG_ACPI_HMAT 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 From patchwork Mon May 5 17:38:18 2025 Content-Type: text/plain; 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X-CSE-ConnectionGUID: 0L/mcOWURUmWDZxpbm0koQ== X-CSE-MsgGUID: Vwlj3DPmRgiwHE0D9ZGqOA== X-IronPort-AV: E=McAfee;i="6700,10204,11424"; a="47991518" X-IronPort-AV: E=Sophos;i="6.15,264,1739865600"; d="scan'208";a="47991518" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2025 10:38:28 -0700 X-CSE-ConnectionGUID: Z1LWtNjORnSpil04/OmPgg== X-CSE-MsgGUID: FFw6pW5TTIGFbd8pQY74yA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,264,1739865600"; d="scan'208";a="140092230" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2025 10:38:28 -0700 From: Tony Luck To: rafael@kernel.org Cc: lenb@kernel.org, Anil Keshavamurthy , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v5 2/3] ACPI/MRRM: Add /sys files to describe memory ranges Date: Mon, 5 May 2025 10:38:18 -0700 Message-ID: <20250505173819.419271-3-tony.luck@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250505173819.419271-1-tony.luck@intel.com> References: <20250505173819.419271-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Perf and resctrl users need an enumeration of which memory addresses are bound to which "region" tag. Parse the ACPI MRRM table and add /sys entries for each memory range describing base address, length, NUMA node, and which region tags apply for same-socket and cross-socket access. Signed-off-by: Tony Luck --- drivers/acpi/acpi_mrrm.c | 142 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 141 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpi_mrrm.c b/drivers/acpi/acpi_mrrm.c index ab8022e58da5..2f22f013959a 100644 --- a/drivers/acpi/acpi_mrrm.c +++ b/drivers/acpi/acpi_mrrm.c @@ -3,12 +3,16 @@ * Copyright (c) 2025, Intel Corporation. * * Memory Range and Region Mapping (MRRM) structure + * + * Parse and report the platform's MRRM table in /sys. */ #define pr_fmt(fmt) "acpi/mrrm: " fmt #include #include +#include +#include static int max_mem_region = -ENOENT; @@ -18,25 +22,161 @@ int acpi_mrrm_max_mem_region(void) return max_mem_region; } +struct mrrm_mem_range_entry { + u64 base; + u64 length; + int node; + u8 local_region_id; + u8 remote_region_id; +}; + +static struct mrrm_mem_range_entry *mrrm_mem_range_entry; +static u32 mrrm_mem_entry_num; + +static int get_node_num(struct mrrm_mem_range_entry *e) +{ + unsigned int nid; + + for_each_online_node(nid) { + for (int z = 0; z < MAX_NR_ZONES; z++) { + struct zone *zone = NODE_DATA(nid)->node_zones + z; + + if (!populated_zone(zone)) + continue; + if (zone_intersects(zone, PHYS_PFN(e->base), PHYS_PFN(e->length))) + return zone_to_nid(zone); + } + } + + return -ENOENT; +} + static __init int acpi_parse_mrrm(struct acpi_table_header *table) { + struct acpi_mrrm_mem_range_entry *mre_entry; struct acpi_table_mrrm *mrrm; + void *mre, *mrrm_end; + int mre_count = 0; mrrm = (struct acpi_table_mrrm *)table; if (!mrrm) return -ENODEV; + if (mrrm->flags & ACPI_MRRM_FLAGS_REGION_ASSIGNMENT_OS) + return -EOPNOTSUPP; + + mrrm_end = (void *)mrrm + mrrm->header.length - 1; + mre = (void *)mrrm + sizeof(struct acpi_table_mrrm); + while (mre < mrrm_end) { + mre_entry = mre; + mre_count++; + mre += mre_entry->header.length; + } + if (!mre_count) { + pr_info(FW_BUG "No ranges listed in MRRM table\n"); + return -EINVAL; + } + + mrrm_mem_range_entry = kmalloc_array(mre_count, sizeof(*mrrm_mem_range_entry), + GFP_KERNEL | __GFP_ZERO); + if (!mrrm_mem_range_entry) + return -ENOMEM; + + mre = (void *)mrrm + sizeof(struct acpi_table_mrrm); + while (mre < mrrm_end) { + struct mrrm_mem_range_entry *e; + + mre_entry = mre; + e = mrrm_mem_range_entry + mrrm_mem_entry_num; + + e->base = mre_entry->addr_base; + e->length = mre_entry->addr_len; + e->node = get_node_num(e); + + if (mre_entry->region_id_flags & ACPI_MRRM_VALID_REGION_ID_FLAGS_LOCAL) + e->local_region_id = mre_entry->local_region_id; + else + e->local_region_id = -1; + if (mre_entry->region_id_flags & ACPI_MRRM_VALID_REGION_ID_FLAGS_REMOTE) + e->remote_region_id = mre_entry->remote_region_id; + else + e->remote_region_id = -1; + + mrrm_mem_entry_num++; + mre += mre_entry->header.length; + } + max_mem_region = mrrm->max_mem_region; return 0; } +#define RANGE_ATTR(name, fmt) \ +static ssize_t name##_show(struct kobject *kobj, \ + struct kobj_attribute *attr, char *buf) \ +{ \ + struct mrrm_mem_range_entry *mre; \ + const char *kname = kobject_name(kobj); \ + int n, ret; \ + \ + ret = kstrtoint(kname + 5, 10, &n); \ + if (ret) \ + return ret; \ + \ + mre = mrrm_mem_range_entry + n; \ + \ + return sysfs_emit(buf, fmt, mre->name); \ +} \ +static struct kobj_attribute name##_attr = __ATTR_RO(name) + +RANGE_ATTR(base, "0x%llx\n"); +RANGE_ATTR(length, "0x%llx\n"); +RANGE_ATTR(node, "%d\n"); +RANGE_ATTR(local_region_id, "%d\n"); +RANGE_ATTR(remote_region_id, "%d\n"); + +static struct attribute *memory_range_attrs[] = { + &base_attr.attr, + &length_attr.attr, + &node_attr.attr, + &local_region_id_attr.attr, + &remote_region_id_attr.attr, + NULL +}; + +ATTRIBUTE_GROUPS(memory_range); + +static __init int add_boot_memory_ranges(void) +{ + struct kobject *pkobj, *kobj; + int ret = -EINVAL; + char *name; + + pkobj = kobject_create_and_add("memory_ranges", acpi_kobj); + + for (int i = 0; i < mrrm_mem_entry_num; i++) { + name = kasprintf(GFP_KERNEL, "range%d", i); + if (!name) + break; + + kobj = kobject_create_and_add(name, pkobj); + + ret = sysfs_create_groups(kobj, memory_range_groups); + if (ret) + return ret; + } + + return ret; +} + static __init int mrrm_init(void) { int ret; ret = acpi_table_parse(ACPI_SIG_MRRM, acpi_parse_mrrm); + if (ret < 0) + return ret; - return ret; + return add_boot_memory_ranges(); } device_initcall(mrrm_init); From patchwork Mon May 5 17:38:19 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Luck, Tony" X-Patchwork-Id: 887520 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 DFE9326D4CD; Mon, 5 May 2025 17:38:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746466713; cv=none; b=D91ACTFN6rML4VDIOPdHLX8eETdC+KWWulLHHZGJO0MHxvptngKdkvHxLOV/0OagEZx8SRnXNoYTIZhdgvMkFlVbgBInrDbxs/trCF4pzTZ0nvBamr4UemC7sR19d6Cf9L9DB/wZhUKUoqPzbLJNpIGW8gBD/6WgslqRCDLDF1g= ARC-Message-Signature: i=1; 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d="scan'208";a="140092233" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2025 10:38:28 -0700 From: Tony Luck To: rafael@kernel.org Cc: lenb@kernel.org, Anil Keshavamurthy , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v5 3/3] ACPI: Add documentation for exposing MRRM data Date: Mon, 5 May 2025 10:38:19 -0700 Message-ID: <20250505173819.419271-4-tony.luck@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250505173819.419271-1-tony.luck@intel.com> References: <20250505173819.419271-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Initial implementation provides enumeration of the address ranges NUMA node numbers, and BIOS assigned region IDs for each range. Signed-off-by: Tony Luck --- Documentation/ABI/testing/sysfs-firmware-acpi | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi index 5249ad5a96d9..fffba38f9ce1 100644 --- a/Documentation/ABI/testing/sysfs-firmware-acpi +++ b/Documentation/ABI/testing/sysfs-firmware-acpi @@ -248,3 +248,24 @@ Description: # cat ff_pwr_btn 7 enabled +What: /sys/firmware/acpi/memory_ranges/rangeX +Date: February 2025 +Contact: Tony Luck +Description: + On systems with the ACPI MRRM table reports the + parameters for each range. + + base: Starting system physical address. + + length: Length of this range in bytes. + + node: NUMA node that this range belongs to. Negative numbers + indicate that the node number could not be determined (e.g + for an address range that is reserved for future hot add of + memory). + + local_region_id: ID associated with access by agents + local to this range of addresses. + + remote_region_id: ID associated with access by agents + non-local to this range of addresses.