Zhang, Yanmin 69dcc99199 [PATCH] Export cpu topology in sysfs ... The patch implements cpu topology exportation by sysfs. Items (attributes) are similar to /proc/cpuinfo. 1) /sys/devices/system/cpu/cpuX/topology/physical_package_id: represent the physical package id of cpu X; 2) /sys/devices/system/cpu/cpuX/topology/core_id: represent the cpu core id to cpu X; 3) /sys/devices/system/cpu/cpuX/topology/thread_siblings: represent the thread siblings to cpu X in the same core; 4) /sys/devices/system/cpu/cpuX/topology/core_siblings: represent the thread siblings to cpu X in the same physical package; To implement it in an architecture-neutral way, a new source file, driver/base/topology.c, is to export the 5 attributes. If one architecture wants to support this feature, it just needs to implement 4 defines, typically in file include/asm-XXX/topology.h. The 4 defines are: #define topology_physical_package_id(cpu) #define topology_core_id(cpu) #define topology_thread_siblings(cpu) #define topology_core_siblings(cpu) The type of **_id is int. The type of siblings is cpumask_t. To be consistent on all architectures, the 4 attributes should have deafult values if their values are unavailable. Below is the rule. 1) physical_package_id: If cpu has no physical package id, -1 is the default value. 2) core_id: If cpu doesn't support multi-core, its core id is 0. 3) thread_siblings: Just include itself, if the cpu doesn't support HT/multi-thread. 4) core_siblings: Just include itself, if the cpu doesn't support multi-core and HT/Multi-thread. So be careful when declaring the 4 defines in include/asm-XXX/topology.h. If an attribute isn't defined on an architecture, it won't be exported. Thank Nathan, Greg, Andi, Paul and Venki. The patch provides defines for i386/x86_64/ia64. Signed-off-by: Zhang, Yanmin <yanmin.zhang@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-02-03 08:32:09 -08:00
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power	[PATCH] device_shutdown can loop if the driver frees itself	2006-01-13 11:26:12 -08:00
attribute_container.c
base.h
bus.c	[PATCH] Driver core: only all userspace bind/unbind if CONFIG_HOTPLUG is enabled	2006-01-04 16:18:09 -08:00
class.c
core.c	[PATCH] DocBook: fix kernel-doc comments	2006-01-10 08:01:53 -08:00
cpu.c	[PATCH] kdump: export per cpu crash notes pointer through sysfs (fix)	2006-01-10 08:01:26 -08:00
dd.c	[PATCH] Add bus_type probe, remove, shutdown methods.	2006-01-13 11:26:04 -08:00
dmapool.c
driver.c	[PATCH] Add bus_type probe, remove, shutdown methods.	2006-01-13 11:26:04 -08:00
firmware_class.c	[PATCH] Unlinline a bunch of other functions	2006-01-14 18:27:06 -08:00
firmware.c
init.c
Kconfig
Makefile	[PATCH] Export cpu topology in sysfs	2006-02-03 08:32:09 -08:00
map.c
memory.c	[PATCH] move capable() to capability.h	2006-01-11 18:42:13 -08:00
node.c
platform.c	[PATCH] platform-device-del typo fix	2006-01-13 11:26:11 -08:00
sys.c
topology.c	[PATCH] Export cpu topology in sysfs	2006-02-03 08:32:09 -08:00
transport_class.c