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Subject[patch] SImple Topology API v0.3 (1/2)
Andrew, Linus, et al:
Here's the latest version of the Simple Topology API. I've broken the patches
into a solely in-kernel portion, and a portion that exposes the API to
userspace via syscalls and prctl. This patch (part 1) is the in-kernel part.
I hope that the smaller versions of these patches will draw more feedback,
comments, flames, etc. Other than that, the patch remains relatively unchanged
from the last posting.

Cheers!

-Matt
diff -Nur linux-2.5.27-vanilla/arch/i386/config.in linux-2.5.27-api/arch/i386/config.in
--- linux-2.5.27-vanilla/arch/i386/config.in Sat Jul 20 12:11:12 2002
+++ linux-2.5.27-api/arch/i386/config.in Wed Jul 24 17:33:41 2002
@@ -166,7 +166,15 @@
define_bool CONFIG_X86_IO_APIC y
fi
else
- bool 'Multiquad NUMA system' CONFIG_MULTIQUAD
+ bool 'Multi-node NUMA system support' CONFIG_X86_NUMA
+ if [ "$CONFIG_X86_NUMA" = "y" ]; then
+ #Platform Choices
+ bool 'Multiquad (IBM/Sequent) NUMAQ support' CONFIG_X86_NUMAQ
+ if [ "$CONFIG_X86_NUMAQ" = "y" ]; then
+ define_bool CONFIG_MULTIQUAD y
+ define_bool CONFIG_X86_TSC_DISABLE y
+ fi
+ fi
fi

bool 'Machine Check Exception' CONFIG_X86_MCE
diff -Nur linux-2.5.27-vanilla/arch/i386/kernel/smpboot.c linux-2.5.27-api/arch/i386/kernel/smpboot.c
--- linux-2.5.27-vanilla/arch/i386/kernel/smpboot.c Sat Jul 20 12:11:18 2002
+++ linux-2.5.27-api/arch/i386/kernel/smpboot.c Wed Jul 24 17:33:41 2002
@@ -60,6 +60,9 @@
/* Bitmask of currently online CPUs */
unsigned long cpu_online_map;

+/* Bitmask of currently online memory blocks */
+unsigned long memblk_online_map;
+
static volatile unsigned long cpu_callin_map;
volatile unsigned long cpu_callout_map;
static unsigned long smp_commenced_mask;
diff -Nur linux-2.5.27-vanilla/include/asm-i386/mmzone.h linux-2.5.27-api/include/asm-i386/mmzone.h
--- linux-2.5.27-vanilla/include/asm-i386/mmzone.h Wed Dec 31 16:00:00 1969
+++ linux-2.5.27-api/include/asm-i386/mmzone.h Wed Jul 24 17:33:41 2002
@@ -0,0 +1,53 @@
+/*
+ * linux/include/asm-i386/mmzone.h
+ *
+ * Written by: Matthew Dobson, IBM Corporation
+ *
+ * Copyright (C) 2002, IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <colpatch@us.ibm.com>
+ */
+#ifndef _ASM_MMZONE_H_
+#define _ASM_MMZONE_H_
+
+#ifdef CONFIG_X86_NUMAQ
+
+#define NR_MEMBLKS 32 /* Max number of Memory Blocks */
+
+#include <asm/numaq.h>
+
+#else /* !CONFIG_X86_NUMAQ */
+
+#define NR_MEMBLKS 1
+
+/* Other architectures wishing to use this simple topology API should fill
+ in the below functions as appropriate in their own <arch>.h file. */
+#define _cpu_to_node(cpu) (0)
+#define _memblk_to_node(memblk) (0)
+#define _node_to_node(nid) (0)
+#define _node_to_cpu(node) (0)
+#define _node_to_memblk(node) (0)
+
+#endif /* CONFIG_X86_NUMAQ */
+
+/* Returns the number of the current Node. */
+#define numa_node_id() (_cpu_to_node(smp_processor_id()))
+
+#endif /* _ASM_MMZONE_H_ */
diff -Nur linux-2.5.27-vanilla/include/asm-i386/numaq.h linux-2.5.27-api/include/asm-i386/numaq.h
--- linux-2.5.27-vanilla/include/asm-i386/numaq.h Wed Dec 31 16:00:00 1969
+++ linux-2.5.27-api/include/asm-i386/numaq.h Wed Jul 24 17:33:41 2002
@@ -0,0 +1,60 @@
+/*
+ * linux/include/asm-i386/numaq.h
+ *
+ * Written by: Matthew Dobson, IBM Corporation
+ *
+ * Copyright (C) 2002, IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <colpatch@us.ibm.com>
+ */
+#ifndef _I386_NUMAQ_H
+#define _I386_NUMAQ_H
+
+#ifdef CONFIG_X86_NUMAQ
+
+#include <asm/smpboot.h>
+
+/* Returns the number of the node containing CPU 'cpu' */
+#define _cpu_to_node(cpu) (cpu_to_logical_apicid(cpu) >> 4)
+
+/* Returns the number of the node containing MemBlk 'memblk' */
+#define _memblk_to_node(memblk) (memblk)
+
+/* Returns the number of the node containing Node 'nid'. This architecture is flat,
+ so it is a pretty simple function! */
+#define _node_to_node(nid) (nid)
+
+/* Returns the number of the first CPU on Node 'node' */
+static inline int _node_to_cpu(int node)
+{
+ int i, cpu, logical_apicid = node << 4;
+
+ for(i = 1; i < 16; i <<= 1)
+ if ((cpu = logical_apicid_to_cpu(logical_apicid | i)) >= 0)
+ return cpu;
+
+ return 0;
+}
+
+/* Returns the number of the first MemBlk on Node 'node' */
+#define _node_to_memblk(node) (node)
+
+#endif /* CONFIG_X86_NUMAQ */
+#endif /* _I386_NUMAQ_H */
diff -Nur linux-2.5.27-vanilla/include/asm-i386/smp.h linux-2.5.27-api/include/asm-i386/smp.h
--- linux-2.5.27-vanilla/include/asm-i386/smp.h Sat Jul 20 12:11:06 2002
+++ linux-2.5.27-api/include/asm-i386/smp.h Wed Jul 24 17:33:41 2002
@@ -55,6 +55,7 @@
extern void smp_alloc_memory(void);
extern unsigned long phys_cpu_present_map;
extern unsigned long cpu_online_map;
+extern unsigned long memblk_online_map;
extern volatile unsigned long smp_invalidate_needed;
extern int pic_mode;
extern int smp_num_siblings;
@@ -95,6 +96,11 @@
return hweight32(cpu_online_map);
}

+extern inline unsigned int num_online_memblks(void)
+{
+ return hweight32(memblk_online_map);
+}
+
extern inline int any_online_cpu(unsigned int mask)
{
if (mask & cpu_online_map)
diff -Nur linux-2.5.27-vanilla/include/linux/mmzone.h linux-2.5.27-api/include/linux/mmzone.h
--- linux-2.5.27-vanilla/include/linux/mmzone.h Sat Jul 20 12:11:05 2002
+++ linux-2.5.27-api/include/linux/mmzone.h Wed Jul 24 17:33:41 2002
@@ -220,15 +20,15 @@
#define NODE_MEM_MAP(nid) mem_map
#define MAX_NR_NODES 1

-#else /* !CONFIG_DISCONTIGMEM */
-
-#include <asm/mmzone.h>
+#else /* CONFIG_DISCONTIGMEM */

/* page->zone is currently 8 bits ... */
#define MAX_NR_NODES (255 / MAX_NR_ZONES)

#endif /* !CONFIG_DISCONTIGMEM */

+#include <asm/mmzone.h>
+
#define MAP_ALIGN(x) ((((x) % sizeof(struct page)) == 0) ? (x) : ((x) + \
sizeof(struct page) - ((x) % sizeof(struct page))))

diff -Nur linux-2.5.27-vanilla/include/linux/smp.h linux-2.5.27-api/include/linux/smp.h
--- linux-2.5.27-vanilla/include/linux/smp.h Sat Jul 20 12:11:22 2002
+++ linux-2.5.27-api/include/linux/smp.h Wed Jul 24 17:33:41 2002
@@ -93,6 +93,7 @@
#define smp_call_function(func,info,retry,wait) ({ 0; })
static inline void smp_send_reschedule(int cpu) { }
static inline void smp_send_reschedule_all(void) { }
+#define memblk_online_map 1
#define cpu_online_map 1
#define cpu_online(cpu) ({ cpu; 1; })
#define num_online_cpus() 1
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