Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753272AbcD1BI4 (ORCPT ); Wed, 27 Apr 2016 21:08:56 -0400 Received: from relay2.sgi.com ([192.48.180.65]:46841 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752750AbcD1BGH (ORCPT ); Wed, 27 Apr 2016 21:06:07 -0400 Message-Id: <20160428005459.235641036@asylum.americas.sgi.com> References: <20160428005457.471061412@asylum.americas.sgi.com> User-Agent: quilt/0.46-1 Date: Wed, 27 Apr 2016 19:55:07 -0500 From: Mike Travis To: Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Andrew Morton , Len Brown Cc: x86@kernel.org, linux-kernel@vger.kernel.org, uv4-kernel@sgi.com Subject: [PATCH 10/21] X86_64, UV: Create per cpu info structs to replace per hub info structs Content-Disposition: inline; filename=uv4_add_per_cpu_info Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3417 Lines: 90 The major portion of the hub info is common to all cpus on that hub. This is step one of moving the per cpu hub info to a per node hub info struct. This patch creates the small per cpu info struct that will contain only information specific to each CPU. Signed-off-by: Mike Travis Reviewed-by: Dimitri Sivanich Tested-by: John Estabrook Tested-by: Gary Kroening --- arch/x86/include/asm/uv/uv_hub.h | 19 +++++++++++++++---- arch/x86/kernel/apic/x2apic_uv_x.c | 15 ++++++++++----- 2 files changed, 25 insertions(+), 9 deletions(-) --- linux.orig/arch/x86/include/asm/uv/uv_hub.h +++ linux/arch/x86/include/asm/uv/uv_hub.h @@ -139,8 +139,9 @@ struct uv_scir_s { /* * The following defines attributes of the HUB chip. These attributes are - * frequently referenced and are kept in the per-cpu data areas of each cpu. - * They are kept together in a struct to minimize cache misses. + * frequently referenced and are kept in a common per hub struct. + * After setup, the struct is read only, so it should be readily + * available in the L3 cache on the cpu socket for the node. */ struct uv_hub_info_s { unsigned long global_mmr_base; @@ -167,9 +168,19 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __ #define uv_hub_info this_cpu_ptr(&__uv_hub_info) #define uv_cpu_hub_info(cpu) (&per_cpu(__uv_hub_info, cpu)) +/* CPU specific info with a pointer to the hub common info struct */ +struct uv_cpu_info_s { + void *p_uv_hub_info; + unsigned char blade_cpu_id; + struct uv_scir_s scir; +}; +DECLARE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info); + +#define uv_cpu_info this_cpu_ptr(&__uv_cpu_info) +#define uv_cpu_info_per(cpu) (&per_cpu(__uv_cpu_info, cpu)) + /* - * Hub revisions less than UV2_HUB_REVISION_BASE are UV1 hubs. All UV2 - * hubs have revision numbers greater than or equal to UV2_HUB_REVISION_BASE. + * HUB revision ranges for each UV HUB architecture. * This is a software convention - NOT the hardware revision numbers in * the hub chip. */ --- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c +++ linux/arch/x86/kernel/apic/x2apic_uv_x.c @@ -202,6 +202,9 @@ EXPORT_SYMBOL_GPL(is_uv_system); DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); +DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info); +EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info); + struct uv_blade_info *uv_blade_info; EXPORT_SYMBOL_GPL(uv_blade_info); @@ -950,11 +953,10 @@ void __init uv_system_init(void) hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8)); /* uv_num_possible_blades() is really the hub count */ - pr_info("UV: Found %d blades, %d hubs\n", - is_uv1_hub() ? - uv_num_possible_blades() : - (uv_num_possible_blades() + 1) / 2, - uv_num_possible_blades()); + pr_info("UV: Found %d hubs, %d nodes, %d cpus\n", + uv_num_possible_blades(), + num_possible_nodes(), + num_possible_cpus()); bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades(); uv_blade_info = kzalloc(bytes, GFP_KERNEL); @@ -1017,6 +1019,9 @@ void __init uv_system_init(void) uv_cpu_hub_info(cpu)->blade_processor_id = lcpu; uv_node_to_blade[nodeid] = blade; uv_cpu_to_blade[cpu] = blade; + + /* Initialize per cpu info list */ + uv_cpu_info_per(cpu)->p_uv_hub_info = uv_cpu_hub_info(cpu); } /* Add blade/pnode info for nodes without cpus */ --