From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f200.google.com (mail-pf1-f200.google.com [209.85.210.200]) by kanga.kvack.org (Postfix) with ESMTP id 92BF28E00A9 for ; Wed, 9 Jan 2019 12:48:03 -0500 (EST) Received: by mail-pf1-f200.google.com with SMTP id d18so5759162pfe.0 for ; Wed, 09 Jan 2019 09:48:03 -0800 (PST) Received: from mga07.intel.com (mga07.intel.com. [134.134.136.100]) by mx.google.com with ESMTPS id c10si25675731pla.173.2019.01.09.09.48.02 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 09 Jan 2019 09:48:02 -0800 (PST) From: Keith Busch Subject: [PATCHv3 12/13] acpi/hmat: Register memory side cache attributes Date: Wed, 9 Jan 2019 10:43:40 -0700 Message-Id: <20190109174341.19818-13-keith.busch@intel.com> In-Reply-To: <20190109174341.19818-1-keith.busch@intel.com> References: <20190109174341.19818-1-keith.busch@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-mm@kvack.org Cc: Greg Kroah-Hartman , Rafael Wysocki , Dave Hansen , Dan Williams , Keith Busch Register memory side cache attributes with the memory's node if HMAT provides the side cache iniformation table. Signed-off-by: Keith Busch --- drivers/acpi/hmat.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/acpi/hmat.c b/drivers/acpi/hmat.c index 45e20dc677f9..9efdd0a63a79 100644 --- a/drivers/acpi/hmat.c +++ b/drivers/acpi/hmat.c @@ -206,6 +206,7 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header, const unsigned long end) { struct acpi_hmat_cache *cache = (void *)header; + struct node_cache_attrs cache_attrs; u32 attrs; if (cache->header.length < sizeof(*cache)) { @@ -219,6 +220,37 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header, cache->memory_PD, cache->cache_size, attrs, cache->number_of_SMBIOShandles); + cache_attrs.size = cache->cache_size; + cache_attrs.level = (attrs & ACPI_HMAT_CACHE_LEVEL) >> 4; + cache_attrs.line_size = (attrs & ACPI_HMAT_CACHE_LINE_SIZE) >> 16; + + switch ((attrs & ACPI_HMAT_CACHE_ASSOCIATIVITY) >> 8) { + case ACPI_HMAT_CA_DIRECT_MAPPED: + cache_attrs.associativity = NODE_CACHE_DIRECT_MAP; + break; + case ACPI_HMAT_CA_COMPLEX_CACHE_INDEXING: + cache_attrs.associativity = NODE_CACHE_INDEXED; + break; + case ACPI_HMAT_CA_NONE: + default: + cache_attrs.associativity = NODE_CACHE_OTHER; + break; + } + + switch ((attrs & ACPI_HMAT_WRITE_POLICY) >> 12) { + case ACPI_HMAT_CP_WB: + cache_attrs.write_policy = NODE_CACHE_WRITE_BACK; + break; + case ACPI_HMAT_CP_WT: + cache_attrs.write_policy = NODE_CACHE_WRITE_THROUGH; + break; + case ACPI_HMAT_CP_NONE: + default: + cache_attrs.write_policy = NODE_CACHE_WRITE_OTHER; + break; + } + + node_add_cache(pxm_to_node(cache->memory_PD), &cache_attrs); return 0; } -- 2.14.4