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linux/arch/i386/kernel
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Andi Kleen f9262c12c0 [PATCH] i386: port ATI timer fix from x86_64 to i386 II 
ATI chipsets tend to generate double timer interrupts for the local APIC
timer when both the 8254 and the IO-APIC timer pins are enabled.  This is
because they route it to both and the result is anded together and the CPU
ends up processing it twice.

This patch changes check_timer to disable the 8254 routing for interrupt 0.

I think it would be safe on all chipsets actually (i tested it on a couple
and it worked everywhere) and Windows seems to do it in a similar way, but
to be conservative this patch only enables this mode on ATI (and adds
options to enable/disable too)

Ported over from a similar x86-64 change.

I reused the ACPI earlyquirk infrastructure for the ATI bridge check, but
tweaked it a bit to work even without ACPI.

Inspired by a patch from Chuck Ebbert, but redone.

Cc: Chuck Ebbert <76306.1226@compuserve.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-08 18:10:31 -08:00
..
acpi [PATCH] i386: port ATI timer fix from x86_64 to i386 II 2006-03-08 18:10:31 -08:00
cpu [PATCH] x86: cpu model calculation for family 6 cpu 2006-03-08 14:14:01 -08:00
timers Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq 2006-02-13 19:10:43 -08:00
.gitignore [PATCH] x86: gitignore some autogenerated files for i386 2006-02-14 16:09:35 -08:00
apic.c [PATCH] Fix bad apic fix on i386 2006-02-07 10:08:38 -08:00
apm.c [PATCH] capable/capability.h (arch/) 2006-01-11 18:42:14 -08:00
asm-offsets.c
bootflag.c
cpuid.c [PATCH] arch/i386/kernel/cpuid.c: unused variable 2006-01-06 08:33:38 -08:00
crash_dump.c [PATCH] kdump: read previous kernel's memory 2006-01-10 08:01:28 -08:00
crash.c [PATCH] kdump: save registers early (inline functions) 2006-01-10 08:01:27 -08:00
dmi_scan.c [PATCH] x86_64: Generalize DMI and enable for x86-64 2006-01-11 19:04:51 -08:00
doublefault.c [PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management 2005-09-05 00:06:11 -07:00
early_printk.c
efi_stub.S
efi.c [PATCH] EFI: Fix gdt load 2006-03-06 18:40:45 -08:00
entry.S [PATCH] Make vm86 support optional 2006-01-08 20:14:11 -08:00
head.S [PATCH] x86: fix broken SMP boot sequence 2006-02-24 14:31:38 -08:00
i386_ksyms.c [PATCH] x86: fix broken SMP boot sequence 2006-02-24 14:31:38 -08:00
i387.c x86: make restore_fpu() use alternative assembler instructions 2005-07-22 16:06:16 -04:00
i8237.c [PATCH] ISA DMA suspend for i386 2005-09-05 00:06:14 -07:00
i8259.c Revert "i386: move apic init in init_IRQs" 2005-10-31 19:16:17 -08:00
init_task.c [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros 2006-01-08 20:13:38 -08:00
io_apic.c [PATCH] i386: port ATI timer fix from x86_64 to i386 II 2006-03-08 18:10:31 -08:00
ioport.c [PATCH] capable/capability.h (arch/) 2006-01-11 18:42:14 -08:00
irq.c [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros 2006-01-08 20:13:38 -08:00
kprobes.c [PATCH] Kprobes causes NX protection fault on i686 SMP 2006-02-24 14:31:37 -08:00
ldt.c [PATCH] arch/i386/kernel/ldt.c should #include <asm/mmu_context.h> 2005-11-07 07:53:29 -08:00
machine_kexec.c [PATCH] fix kexec asm 2006-03-08 14:15:04 -08:00
Makefile [PATCH] i386: port ATI timer fix from x86_64 to i386 II 2006-03-08 18:10:31 -08:00
mca.c [PATCH] arch/i386: Use ARRAY_SIZE macro 2005-11-07 07:53:28 -08:00
microcode.c [PATCH] x86 microcode driver vs hotplug CPUs. 2006-02-28 20:53:43 -08:00
module.c
mpparse.c [PATCH] i386: Handle non existing APICs without panicing 2006-02-26 09:53:30 -08:00
msr.c [PATCH] arch/i386/kernel/msr.c: removed unused variable 2006-01-06 08:33:38 -08:00
nmi.c [PATCH] x86: Fix i386 nmi_watchdog that does not trigger die_nmi 2006-03-08 14:14:01 -08:00
numaq.c [PATCH] re-disable TSC on NUMAQ 2005-07-28 21:46:05 -07:00
pci-dma.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
process.c [PATCH] i386: print kernel version in register dumps 2006-02-05 11:06:53 -08:00
ptrace.c [PATCH] i386: PTRACE_POKEUSR: allow changing RF bit in EFLAGS register. 2006-01-05 20:50:51 -08:00
quirks.c [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
reboot_fixups.c [PATCH] arch/i386/kernel/reboot_fixups.c should #include <linux/reboot_fixups.h> 2005-11-07 07:53:29 -08:00
reboot.c [PATCH] i386/x86-64: Don't IPI to offline cpus on shutdown 2006-01-11 19:04:50 -08:00
relocate_kernel.S [PATCH] kexec: x86 kexec core 2005-06-25 16:24:49 -07:00
scx200.c [PATCH] arch: Replace pci_module_init() with pci_register_driver() 2006-01-09 12:13:21 -08:00
semaphore.c [PATCH] unify x86/x86-64 semaphore code 2005-09-05 00:06:14 -07:00
setup.c [PATCH] i386: port ATI timer fix from x86_64 to i386 II 2006-03-08 18:10:31 -08:00
sigframe.h [PATCH] __user annotations for pointers in i386 sigframe 2005-09-09 10:31:59 -07:00
signal.c [PATCH] Handle TIF_RESTORE_SIGMASK for i386 2006-01-18 19:20:29 -08:00
smp.c [PATCH] useless includes of linux/irq.h in arch/i386 2005-09-26 18:29:50 -07:00
smpboot.c [PATCH] x86: fix broken SMP boot sequence 2006-02-24 14:31:38 -08:00
srat.c [PATCH] x86_64: Make i386 compile again with fourth DMA32 zone 2005-11-14 19:55:13 -08:00
summit.c
sys_i386.c
syscall_table.S [PATCH] fstatat64 support 2006-02-11 21:41:10 -08:00
sysenter.c [PATCH] sep initializing rework 2005-06-25 16:24:29 -07:00
time_hpet.c [PATCH] move rtc_interrupt() prototype to rtc.h 2006-01-08 20:13:47 -08:00
time.c [PATCH] x86: fix potential jiffies overflow in timer_resume() 2006-03-06 18:40:44 -08:00
topology.c [PATCH] Fix topology.c location 2006-02-24 14:31:39 -08:00
trampoline.S
traps.c [PATCH] i386: print kernel version in register dumps 2006-02-05 11:06:53 -08:00
vm86.c correct email address of Manfred Spraul 2006-01-15 02:43:54 +01:00
vmlinux.lds.S [PATCH] i386 / uml: add dwarf sections to static link script 2005-09-10 12:00:17 -07:00
vsyscall-int80.S
vsyscall-note.S
vsyscall-sigreturn.S kbuild: full dependency check on asm-offsets.h 2005-09-09 19:28:28 +02:00
vsyscall-sysenter.S [PATCH] x86: document sysenter path 2006-02-14 16:09:35 -08:00
vsyscall.lds.S kbuild: full dependency check on asm-offsets.h 2005-09-09 19:28:28 +02:00
vsyscall.S