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Andi Kleen ab9b32ee62 [PATCH] x86_64: Better ATI timer fix 
The previous experiment for using apicmaintimer on ATI systems didn't
work out very well.  In particular laptops with C2/C3 support often
don't let it tick during idle, which makes it useless.  There were also
some other bugs that made the apicmaintimer often not used at all.

I tried some other experiments - running timer over RTC and some other
things but they didn't really work well neither.

I rechecked the specs now and it turns out this simple change is
actually enough to avoid the double ticks on the ATI systems.  We just
turn off IRQ 0 in the 8254 and only route it directly using the IO-APIC.

I tested it on a few ATI systems and it worked there.  In fact it worked
on all chipsets (NVidia, Intel, AMD, ATI) I tried it on.

According to the ACPI spec routing should always work through the
IO-APIC so I think it's the correct thing to do anyways (and most of the
old gunk in check_timer should be thrown away for x86-64).

But for 2.6.16 it's best to do a fairly minimal change:
 - Use the known to be working everywhere-but-ATI IRQ0 both over 8254
   and IO-APIC setup everywhere
 - Except on ATI disable IRQ0 in the 8254
 - Remove the code to select apicmaintimer on ATI chipsets
 - Add some boot options to allow to override this (just paranoia)

In 2.6.17 I hope to switch the default over to this for everybody.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2006-02-26 09:53:31 -08:00
..
DocBook Fix "stuct", "strut", "struc" typos 2006-01-15 02:12:54 +01:00
RCU [PATCH] RCU documentation fixes (January 2006 update) 2006-02-01 08:53:25 -08:00
aoe [PATCH] aoe [1/2]: support 16 AoE slot addresses per AoE shelf 2005-09-09 14:23:16 -07:00
arm [ARM] Add memory.txt to 00-INDEX 2005-12-04 17:56:46 +00:00
block barrier.txt got lost while the new barrier patchset was climbing up 2006-01-16 09:45:58 +01:00
cdrom [PATCH] remove verify_area(): remove or edit references to verify_area in Documentation/ 2005-09-07 16:57:35 -07:00
connector [CONNECTOR]: Fix documentation test module. 2005-11-08 09:38:56 -08:00
cpu-freq [PATCH] cpufreq: documentation for 'ondemand' and 'conservative' 2005-12-01 01:23:23 -08:00
cris Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
crypto [PATCH] Spelling fixes for Documentation/ 2005-09-10 10:06:28 -07:00
device-mapper [PATCH] Fix dm-snapshot tutorial in Documentation 2005-11-07 07:53:54 -08:00
driver-model [PATCH] Clean up Documentation/driver-model/overview.txt 2006-02-03 08:31:59 -08:00
drivers/edac [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
dvb V4L/DVB (3336): Bluebird firmware hosting moved to common dvb firmware dir on linuxtv.org 2006-01-09 18:21:40 -02:00
early-userspace earlyuserspace/README: fix homonym err 2005-11-08 17:16:50 +01:00
fb [PATCH] Update cyblafb driver 2006-01-09 10:00:36 -08:00
filesystems Merge git://git.kernel.org/pub/scm/linux/kernel/git/aia21/ntfs-2.6 2006-02-24 14:36:42 -08:00
firmware_class [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
fujitsu/frv [PATCH] FRV: Use virtual interrupt disablement 2006-02-14 16:09:35 -08:00
hwmon [PATCH] w83627hf: Document the reset module parameter 2006-02-13 22:30:09 -08:00
i2c [PATCH] i2c: Rename i2c-sis96x documentation file 2006-02-06 12:02:14 -08:00
i2o spelling: s/retreive/retrieve/ 2006-01-10 00:10:13 +01:00
i386 [PATCH] Make the bzImage format self-terminating 2005-09-07 16:57:29 -07:00
ia64 [IA64] Add Documentation/ia64/mca.txt 2005-09-16 10:34:16 -07:00
infiniband [PATCH] IB: Add core locking documentation to Infiniband 2005-07-27 16:26:15 -07:00
input Fix "stuct", "strut", "struc" typos 2006-01-15 02:12:54 +01:00
ioctl spelling: s/appropiate/appropriate/ 2006-01-15 02:00:17 +01:00
isdn Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kbuild kbuild: remove GCC_VERSION 2006-01-08 19:58:51 +01:00
kdump [PATCH] kdump: add dmesg gdbmacro into document 2006-01-11 18:42:10 -08:00
m68k [PATCH] mm: m68k kill stram swap 2005-10-29 21:40:38 -07:00
mips [MIPS] Update docs to reflect the latest status of the Alchemy IDE driver. 2006-02-14 19:13:23 +00:00
networking [IPV4]: Document icmp_errors_use_inbound_ifaddr sysctl 2006-02-02 17:02:25 -08:00
parisc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pcmcia [PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback 2006-01-06 00:03:24 +01:00
power [PATCH] swsusp: use bytes as image size units 2006-02-01 08:53:12 -08:00
powerpc [PATCH] powerpc: Add FSL USB node to documentation 2006-02-10 16:36:21 +11:00
s390 [PATCH] s390: "extern inline" -> "static inline" 2005-11-09 07:55:52 -08:00
scsi [SCSI] megaraid_sas: support for 1078 type controller added 2006-02-04 16:38:41 -06:00
serial [SERIAL] Update serial_core documentation 2005-10-31 11:53:19 +00:00
sh Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sound [ALSA] fix typos in writing-an-alsa-driver 2006-02-01 13:09:31 +01:00
sparc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
spi [PATCH] SPI: spi_butterfly, restore lost deltas 2006-02-06 12:17:17 -08:00
sysctl [PATCH] suspend-to-ram: allow video options to be set at runtime 2006-02-20 20:00:10 -08:00
telephony Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uml [PATCH] Spelling fixes for Documentation/ 2005-09-10 10:06:28 -07:00
usb [PATCH] USB: drivers/usb/media/w9968cf.c: remove hooks for the vpp module 2006-01-31 17:23:42 -08:00
video4linux V4L/DVB (3409): Mark Typhoon cards as Lifeview OEM's 2006-01-23 17:06:26 -02:00
vm [PATCH] Direct Migration V9: migrate_pages() extension 2006-02-01 08:53:16 -08:00
w1 [PATCH] w1: Updates the w1 documentation (w1.generic) 2005-06-21 21:43:12 -07:00
watchdog [PATCH] ppc32: Added support for the Book-E style Watchdog Timer 2005-09-05 00:05:56 -07:00
x86_64 [PATCH] x86_64: Better ATI timer fix 2006-02-26 09:53:31 -08:00
00-INDEX [PATCH] update Documentation/00-INDEX 2005-11-18 10:51:22 -08:00
BUG-HUNTING Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Changes [PATCH] remove gcc-2 checks 2006-01-08 20:14:02 -08:00
CodingStyle [PATCH] CodingStyle correction 2006-01-10 08:01:52 -08:00
DMA-API.txt [PATCH] Spelling fixes for Documentation/ 2005-09-10 10:06:28 -07:00
DMA-ISA-LPC.txt [PATCH] ISA DMA API documentation 2005-09-09 14:03:42 -07:00
DMA-mapping.txt [PATCH] remove old scsi data direction macros 2005-04-18 13:49:58 -05:00
HOWTO [PATCH] Add HOWTO do kernel development document to the Documentation directory 2005-11-18 10:51:21 -08:00
IO-mapping.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
IPMI.txt [PATCH] ipmi poweroff: fix chassis control 2005-09-07 16:57:49 -07:00
IRQ-affinity.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
MSI-HOWTO.txt [PATCH] Doc/MSI-HOWTO: cleanups 2005-11-07 07:53:55 -08:00
ManagementStyle Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
PCIEBUS-HOWTO.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
README.DAC960 Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
README.cycladesZ Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
SAK.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
SecurityBugs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
SubmittingDrivers [PATCH] docs: update some updated code docs 2006-01-14 10:39:53 -08:00
SubmittingPatches [PATCH] docs: update some updated code docs 2006-01-14 10:39:53 -08:00
VGA-softcursor.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
acpi-hotkey.txt Merge to-linus-stable into to-akpm 2005-08-15 15:52:00 -04:00
applying-patches.txt [PATCH] Docs update: typos, corrections and additions to applying-patches.txt 2006-01-10 08:01:54 -08:00
atomic_ops.txt [PATCH] atomic: inc_not_zero 2005-11-13 18:14:16 -08:00
basic_profiling.txt [PATCH] oprofile: report anonymous region samples 2005-06-24 00:06:27 -07:00
binfmt_misc.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cachetlb.txt spelling: s/appropiate/appropriate/ 2006-01-15 02:00:17 +01:00
cciss.txt [SCSI] cciss: scsi error handling 2005-11-06 14:12:49 -06:00
cli-sti-removal.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
computone.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpqarray.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpu-hotplug.txt [PATCH] cpu hotplug documentation fix 2006-02-20 20:00:10 -08:00
cpusets.txt cpuset two little doc fixes 2006-01-11 02:01:38 +01:00
cputopology.txt [PATCH] Export cpu topology in sysfs 2006-02-03 08:32:09 -08:00
dcdbas.txt [PATCH] dcdbas: add Dell Systems Management Base Driver with sysfs support 2005-09-07 16:57:27 -07:00
debugging-modules.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dell_rbu.txt [PATCH] dell_rbu: changes in packet update mechanism 2005-10-11 09:46:53 -07:00
devices.txt [PATCH] USB: Delete leftovers from bluetty driver 2005-11-17 11:29:53 -08:00
digiepca.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dnotify.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dontdiff [PATCH] dontdiff: add asm_offsets 2005-09-13 08:22:29 -07:00
eisa.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
exception.txt [PATCH] remove verify_area(): remove or edit references to verify_area in Documentation/ 2005-09-07 16:57:35 -07:00
feature-removal-schedule.txt Revert mount/umount uevent removal 2006-02-22 09:39:02 -08:00
floppy.txt [PATCH] kernel Doc/ URL corrections 2005-11-22 09:14:30 -08:00
ftape.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hayes-esp.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
highuid.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hpet.txt Documentation/hpet.txt typo 2006-01-15 02:09:54 +01:00
hrtimers.txt [PATCH] hrtimer: hrtimer documentation 2006-01-10 08:01:37 -08:00
hw_random.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ibm-acpi.txt [ACPI] IBM ThinkPad ACPI Extras Driver v0.12 2005-08-25 17:37:51 -04:00
ide.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
initrd.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
io_ordering.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ioctl-number.txt [PATCH] kernel Doc/ URL corrections 2005-11-22 09:14:30 -08:00
iostats.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
isapnp.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
java.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kernel-doc-nano-HOWTO.txt [PATCH] Doc/kernel-doc: add more usage info 2006-02-01 08:53:27 -08:00
kernel-docs.txt [PATCH] kernel Doc/ URL corrections 2005-11-22 09:14:30 -08:00
kernel-parameters.txt [PATCH] x86_64: Add boot option to disable randomized mappings and cleanup 2006-02-17 08:00:40 -08:00
keys-request-key.txt [PATCH] keys: Permit running process to instantiate keys 2006-01-08 20:13:53 -08:00
keys.txt [PATCH] keys: Permit running process to instantiate keys 2006-01-08 20:13:53 -08:00
kobject.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kprobes.txt [PATCH] kprobes: Update Documentation/kprobes.txt 2006-02-14 16:09:34 -08:00
kref.txt [PATCH] kref: add link to original documentation to the kref documentation. 2005-04-18 21:57:30 -07:00
laptop-mode.txt spelling: s/appropiate/appropriate/ 2006-01-15 02:00:17 +01:00
ldm.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
locks.txt [PATCH] Docs update: remove obsolete patch from locks.txt 2006-01-10 08:01:54 -08:00
logo.gif Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
logo.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
magic-number.txt [PATCH] mm: rename kmem_cache_s to kmem_cache 2005-11-07 07:53:24 -08:00
mandatory.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mca.txt [PATCH] kernel Doc/ URL corrections 2005-11-22 09:14:30 -08:00
md.txt [PATCH] md: allow sync-speed to be controlled per-device 2006-01-06 08:34:10 -08:00
memory.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mono.txt [PATCH] merge some from Rusty's trivial patches 2005-09-10 10:06:30 -07:00
moxa-smartio Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mtrr.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mutex-design.txt [PATCH] mutex subsystem, documentation 2006-01-09 15:59:20 -08:00
nbd.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
nfsroot.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
nmi_watchdog.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
nommu-mmap.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
numastat.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
oops-tracing.txt [PATCH] doc: refer to kdump in oops-tracing.txt 2006-01-11 18:42:10 -08:00
paride.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
parport-lowlevel.txt [PATCH] parport: fix documentation 2006-02-03 08:32:06 -08:00
parport.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci-error-recovery.txt [PATCH] Documentation: Updated PCI Error Recovery 2006-02-03 08:32:00 -08:00
pci.txt [PATCH] merge some from Rusty's trivial patches 2005-09-10 10:06:30 -07:00
pm.txt [ACPI] linux-acpi@vger.kernel.org replaces acpi-devel@lists.sourceforge.net 2006-01-06 16:19:26 -05:00
pnp.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
preempt-locking.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
prio_tree.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ramdisk.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
riscom8.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rocket.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rpc-cache.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rtc.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sched-arch.txt [PATCH] sched: resched and cpu_idle rework 2005-11-09 07:56:33 -08:00
sched-coding.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sched-design.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sched-domains.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sched-stats.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
seclvl.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
serial-console.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sgi-ioc4.txt [PATCH] ioc4: Core driver rewrite 2005-06-21 18:46:32 -07:00
sgi-visws.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sharedsubtree.txt [PATCH] Complete description of shared subtrees. 2005-11-07 18:18:11 -08:00
smart-config.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
smp.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sonypi.txt [PATCH] sonypi SPIC initialisation fix 2005-09-07 16:57:24 -07:00
sparse.txt [PATCH] Documentation/sparse.txt: mention CF=-Wbitwise 2005-11-07 07:53:54 -08:00
specialix.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
spinlocks.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
stable_api_nonsense.txt [PATCH] stable_api_nonsense.txt fixes 2005-07-29 13:12:49 -07:00
stable_kernel_rules.txt [PATCH] Docs update: small fixes to stable_kernel_rules.txt 2006-01-10 08:01:55 -08:00
stallion.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
svga.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sx.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sysrq.txt update for Documentation/sysrq.txt 2006-01-03 13:31:01 +01:00
time_interpolators.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tipar.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tty.txt [PATCH] Introduce tty_unregister_ldisc() 2005-06-23 09:45:35 -07:00
unicode.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unshare.txt [PATCH] unshare system call -v5: Documentation file 2006-02-07 16:12:34 -08:00
voyager.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xterm-linux.xpm Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
zorro.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00

README.cycladesZ 

The Cyclades-Z must have firmware loaded onto the card before it will
operate.  This operation should be performed during system startup,

The firmware, loader program and the latest device driver code are
available from Cyclades at
    ftp://ftp.cyclades.com/pub/cyclades/cyclades-z/linux/