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ef93bf8039
UV4 uses a GAM (globally addressed memory) architecture that supports variable sized memory per node. This replaces the old "M" value (number of address bits per node) with a range table for conversions between addresses and physical node (pnode) id's. This table is obtained from UV BIOS via the EFI UVsystab table. Support for older EFI UVsystab tables is maintained. Tested-by: Dimitri Sivanich <sivanich@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215405.329827545@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
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* This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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* Copyright (c) Russ Anderson
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*/
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#include <linux/device.h>
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#include <asm/uv/bios.h>
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#include <asm/uv/uv.h>
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struct kobject *sgi_uv_kobj;
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static ssize_t partition_id_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
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}
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static ssize_t coherence_id_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%ld\n", uv_partition_coherence_id());
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}
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static struct kobj_attribute partition_id_attr =
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__ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
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static struct kobj_attribute coherence_id_attr =
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__ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
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static int __init sgi_uv_sysfs_init(void)
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{
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unsigned long ret;
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if (!is_uv_system())
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return -ENODEV;
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if (!sgi_uv_kobj)
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sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
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if (!sgi_uv_kobj) {
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printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
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return -EINVAL;
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}
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ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
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if (ret) {
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printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
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return ret;
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}
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ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
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if (ret) {
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printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
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return ret;
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}
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return 0;
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}
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device_initcall(sgi_uv_sysfs_init);
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