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b02aae9cf5
android_kernel_xiaomi_sm8350/include/asm-x86
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Rene Herman b02aae9cf5 x86: provide a DMI based port 0x80 I/O delay override. 
x86: provide a DMI based port 0x80 I/O delay override.

Certain (HP) laptops experience trouble from our port 0x80 I/O delay
writes. This patch provides for a DMI based switch to the "alternate
diagnostic port" 0xed (as used by some BIOSes as well) for these.

David P. Reed confirmed that port 0xed works for him and provides a
proper delay. The symptoms of _not_ working are a hanging machine,
with "hwclock" use being a direct trigger.

Earlier versions of this attempted to simply use udelay(2), with the
2 being a value tested to be a nicely conservative upper-bound with
help from many on the linux-kernel mailinglist but that approach has
two problems.

First, pre-loops_per_jiffy calibration (which is post PIT init while
some implementations of the PIT are actually one of the historically
problematic devices that need the delay) udelay() isn't particularly
well-defined. We could initialise loops_per_jiffy conservatively (and
based on CPU family so as to not unduly delay old machines) which
would sort of work, but...

Second, delaying isn't the only effect that a write to port 0x80 has.
It's also a PCI posting barrier which some devices may be explicitly
or implicitly relying on. Alan Cox did a survey and found evidence
that additionally some drivers may be racy on SMP without the bus
locking outb.

Switching to an inb() makes the timing too unpredictable and as such,
this DMI based switch should be the safest approach for now. Any more
invasive changes should get more rigid testing first. It's moreover
only very few machines with the problem and a DMI based hack seems
to fit that situation.

This also introduces a command-line parameter "io_delay" to override
the DMI based choice again:

	io_delay=<standard|alternate>

where "standard" means using the standard port 0x80 and "alternate"
port 0xed.

This retains the udelay method as a config (CONFIG_UDELAY_IO_DELAY) and
command-line ("io_delay=udelay") choice for testing purposes as well.

This does not change the io_delay() in the boot code which is using
the same port 0x80 I/O delay but those do not appear to be a problem
as David P. Reed reported the problem was already gone after using the
udelay version. He moreover reported that booting with "acpi=off" also
fixed things and seeing as how ACPI isn't touched until after this DMI
based I/O port switch I believe it's safe to leave the ones in the boot
code be.

The DMI strings from David's HP Pavilion dv9000z are in there already
and we need to get/verify the DMI info from other machines with the
problem, notably the HP Pavilion dv6000z.

This patch is partly based on earlier patches from Pavel Machek and
David P. Reed.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:30:05 +01:00
..
mach-bigsmp
mach-default x86: fix reboot with no keyboard attached 2007-11-17 16:27:01 +01:00
mach-es7000 x86: fix bogus memcpy in es7000_check_dsdt() 2007-11-17 16:27:00 +01:00
mach-generic
mach-numaq
mach-summit
mach-visws x86: visws extern inline to static inline 2007-10-17 20:16:39 +02:00
mach-voyager x86: voyager use correct header file name 2007-11-17 16:27:00 +01:00
xen
a.out.h x86: unify a.out{,_32,_64}.h 2007-10-23 22:37:23 +02:00
acpi_32.h x86: Unify i386 and x86-64 early quirks 2007-10-19 20:35:03 +02:00
acpi_64.h
acpi.h ACPI: Set max_cstate to 1 for early Opterons. 2007-11-26 20:42:19 +01:00
agp.h x86: unify include/asm/agp_32/64.h 2007-10-17 20:17:12 +02:00
alternative_32.h
alternative_64.h
alternative-asm.h x86: rename .i assembler includes to .h 2007-10-17 20:16:29 +02:00
alternative.h
apic_32.h x86: fix ACPI compile for LOCAL_APIC=n 2007-11-26 20:42:19 +01:00
apic_64.h x86: add lapic_shutdown for x86_64 2007-10-23 22:37:22 +02:00
apic.h
apicdef_32.h
apicdef_64.h
apicdef.h
arch_hooks.h
atomic_32.h
atomic_64.h x86: make atomic64_t work like atomic_t 2007-10-17 20:16:21 +02:00
atomic.h
auxvec.h x86: unify include/asm/auxvec_32/64.h 2007-10-17 20:17:13 +02:00
bitops_32.h bitops kernel-doc: inline instead of macro 2007-10-25 16:16:26 -07:00
bitops_64.h x86 bitops: fix code style issues 2007-10-25 16:16:26 -07:00
bitops.h
boot.h
bootparam.h Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
bug.h x86: unify include/asm/bug_32/64.h 2007-10-17 20:26:16 +02:00
bugs.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
byteorder.h x86: fix asm-x86/byteorder.h for userspace export 2008-01-01 19:12:15 +01:00
cache.h x86: unify include/asm/cache_32/64.h 2007-10-17 20:17:15 +02:00
cacheflush.h Intel IOMMU: clflush_cache_range now takes size param 2007-10-22 08:13:18 -07:00
calgary.h
calling.h
checksum_32.h
checksum_64.h
checksum.h
cmpxchg_32.h
cmpxchg_64.h
cmpxchg.h
compat.h x86: Use linux/elfcore-compat.h 2007-10-19 20:35:02 +02:00
cpu.h i386: no need to make enable_cpu_hotplug a variable 2007-10-17 20:16:16 +02:00
cpufeature_32.h I/OAT: Add DCA services 2007-10-16 09:43:09 -07:00
cpufeature_64.h minimal build fixes for uml (fallout from x86 merge) 2007-10-13 09:57:15 -07:00
cpufeature.h
cputime.h x86: trivial header merges 2007-10-17 20:17:08 +02:00
current_32.h
current_64.h
current.h
debugreg.h x86: unify include/asm/debugreg_32/64.h 2007-10-17 20:35:37 +02:00
delay.h x86: unify include/asm/delay_32/64.h 2007-10-17 20:17:17 +02:00
desc_32.h
desc_64.h x86: use descriptor's functions instead of inline assembly 2007-10-19 20:35:03 +02:00
desc_defs.h
desc.h
device.h intel-iommu: fix for IOMMU early crash 2007-10-22 08:13:19 -07:00
div64.h x86: unify div64{,_32,_64}.h 2007-10-23 22:37:23 +02:00
dma_32.h
dma_64.h
dma-mapping_32.h Change table chaining layout 2007-10-22 21:20:01 +02:00
dma-mapping_64.h x86-64: enable sg chaining 2007-10-16 11:26:02 +02:00
dma-mapping.h
dma.h
dmi.h x86: unify include/asm/dmi_32/64.h 2007-10-17 20:17:18 +02:00
dwarf2_32.h
dwarf2_64.h
dwarf2.h
e820_32.h Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
e820_64.h Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
e820.h Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
edac.h x86: unify include/asm/cache_32/64.h 2007-10-17 20:17:19 +02:00
elf.h x86: merge elf_32/64.h 2007-10-23 22:37:23 +02:00
emergency-restart.h
errno.h x86: trivial header merges 2007-10-17 20:17:08 +02:00
fb.h x86: unify include/asm/cache_32/64.h 2007-10-17 20:17:21 +02:00
fcntl.h
fixmap_32.h
fixmap_64.h
fixmap.h
floppy.h x86: unify include/asm/floppy_32/64.h 2007-10-17 20:24:56 +02:00
fpu32.h
frame.h x86: rename .i assembler includes to .h 2007-10-17 20:16:29 +02:00
futex_32.h
futex_64.h
futex.h
gart.h x86 gart: rename symbols only used for the GART implementation 2007-10-30 00:22:22 +01:00
genapic_32.h
genapic_64.h
genapic.h
geode.h GEODE: use symbolic constant in cs5536 reboot fixup 2007-10-19 20:35:02 +02:00
hardirq_32.h x86: expand /proc/interrupts to include missing vectors, v2 2007-10-17 20:16:53 +02:00
hardirq_64.h
hardirq.h
highmem.h
hpet.h x86: offer is_hpet_enabled() on !CONFIG_HPET_TIMER too 2008-01-30 13:30:02 +01:00
hw_irq_32.h
hw_irq_64.h x86: Add parenthesis to IRQ vector macros 2007-10-17 20:16:28 +02:00
hw_irq.h
hypertransport.h
i387_32.h
i387_64.h x86: fix taking DNA during 64bit sigreturn 2007-11-12 11:09:33 -08:00
i387.h
i8253.h i386: Remove the useless #ifdef in i8253.h 2007-10-12 23:04:23 +02:00
i8259.h
ia32_unistd.h
ia32.h
ide.h ide: add CONFIG_IDE_ARCH_OBSOLETE_INIT 2007-10-20 00:32:32 +02:00
idle.h
intel_arch_perfmon.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
io_32.h x86: provide a DMI based port 0x80 I/O delay override. 2008-01-30 13:30:05 +01:00
io_64.h x86: provide a DMI based port 0x80 I/O delay override. 2008-01-30 13:30:05 +01:00
io_apic_32.h i386: Expose IOAPIC register definitions even if CONFIG_X86_IO_APIC is not set 2007-10-13 10:18:17 +02:00
io_apic_64.h x86: Unify i386 and x86-64 early quirks 2007-10-19 20:35:03 +02:00
io_apic.h
io.h
ioctl.h
ioctls.h x86: unify include/asm/ioctls_32/64.h 2007-10-17 20:26:11 +02:00
iommu.h x86 gart: rename iommu.h to gart.h 2007-10-30 00:22:22 +01:00
ipcbuf.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
ipi.h x86: convert cpu_to_apicid to be a per cpu variable 2007-10-19 20:35:03 +02:00
irq_32.h i386: introduce "used_vectors" bitmap which can be used to reserve vectors. 2007-10-19 20:35:03 +02:00
irq_64.h
irq_regs_32.h
irq_regs_64.h
irq_regs.h
irq.h
irqflags_32.h lockdep: fixup irq tracing 2007-10-25 14:01:10 +02:00
irqflags_64.h lockdep: fixup irq tracing 2007-10-25 14:01:10 +02:00
irqflags.h
ist.h Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
k8.h
Kbuild x86: merge setup_32/64.h 2007-10-23 22:37:24 +02:00
kdebug.h x86: unify include/asm/kdebug_32/64.h 2007-10-17 20:26:12 +02:00
kexec_32.h
kexec_64.h
kexec.h
kmap_types.h x86: unify include/asm/agp_32/64.h 2007-10-17 20:26:13 +02:00
kprobes_32.h x86: jprobe bugfix 2007-12-18 18:05:58 +01:00
kprobes_64.h x86: jprobe bugfix 2007-12-18 18:05:58 +01:00
kprobes.h
ldt.h x86: unify include/asm/ldt_32/64.h 2007-10-17 20:16:47 +02:00
lguest_hcall.h lguest: make async_hcall() static 2007-11-05 21:53:29 +11:00
lguest.h Reorder guest saved regs to match hyperall order 2007-10-23 15:49:51 +10:00
linkage_32.h
linkage_64.h
linkage.h
local_32.h
local_64.h
local.h
mach_apic.h
math_emu.h
mc146818rtc_32.h
mc146818rtc_64.h
mc146818rtc.h
mca_dma.h
mca.h
mce.h x86: unify include/asm/mce_32/64.h 2007-10-17 20:16:44 +02:00
mman.h x86: unify include/asm/mman_32/64.h 2007-10-17 20:26:15 +02:00
mmsegment.h
mmu_context_32.h
mmu_context_64.h
mmu_context.h
mmu.h x86: merge mmu{,_32,_64}.h 2007-10-23 22:37:22 +02:00
mmx.h
mmzone_32.h
mmzone_64.h
mmzone.h
module_32.h
module_64.h
module.h
mpspec_32.h
mpspec_64.h
mpspec_def.h
mpspec.h
msgbuf.h x86: merge msgbuf_32/64.h 2007-10-23 22:37:24 +02:00
msidef.h
msr-index.h i386: i386 add AMD64 Barcelona PMU MSR definitions to msr.h 2007-10-19 20:35:03 +02:00
msr.h x86: asm-x86/msr.h: pull in linux/types.h 2008-01-15 16:44:38 +01:00
mtrr.h x86: merge mttr_32/64.h 2007-10-23 22:37:24 +02:00
mutex_32.h
mutex_64.h
mutex.h
namei.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
nmi_32.h
nmi_64.h
nmi.h
numa_32.h
numa_64.h x86: clean up apicid_to_node declaration 2007-10-17 20:15:16 +02:00
numa.h
numaq.h
page_32.h
page_64.h x86_64: SPARSEMEM_VMEMMAP 2M page size support 2007-10-16 09:42:51 -07:00
page.h
param.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
paravirt.h paravirt: clean up lazy mode handling 2007-10-16 11:51:29 -07:00
parport.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
pci_32.h PCI: merge almost all of pci_32.h and pci_64.h together 2007-10-12 15:03:20 -07:00
pci_64.h x86 gart: rename CONFIG_IOMMU to CONFIG_GART_IOMMU 2007-10-30 00:22:22 +01:00
pci-direct.h
pci.h PCI: merge almost all of pci_32.h and pci_64.h together 2007-10-12 15:03:20 -07:00
pda.h x86: expand /proc/interrupts to include missing vectors, v2 2007-10-17 20:16:53 +02:00
percpu_32.h
percpu_64.h
percpu.h
pgalloc_32.h
pgalloc_64.h
pgalloc.h
pgtable_32.h remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
pgtable_64.h remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
pgtable-2level-defs.h
pgtable-2level.h
pgtable-3level-defs.h paravirt: refactor struct paravirt_ops into smaller pv_*_ops 2007-10-16 11:51:29 -07:00
pgtable-3level.h
pgtable.h
poll.h
posix_types_32.h
posix_types_64.h
posix_types.h
prctl.h
processor_32.h x86: convert cpuinfo_x86 array to a per_cpu array 2007-10-19 20:35:04 +02:00
processor_64.h x86: convert cpuinfo_x86 array to a per_cpu array 2007-10-19 20:35:04 +02:00
processor-cyrix.h
processor-flags.h KVM: Use standard CR8 flags, and fix TPR definition 2007-10-13 10:18:19 +02:00
processor.h
proto.h x86: Unify i386 and x86-64 early quirks 2007-10-19 20:35:03 +02:00
ptrace-abi.h x86: unify include/asm/ptrace-abi_32/64.h 2007-10-17 20:16:45 +02:00
ptrace.h oprofile: fix oops on x86 32-bit 2007-11-14 18:45:44 -08:00
reboot_fixups.h
reboot.h
required-features.h x86: merge required-features.h 2007-10-23 22:37:24 +02:00
resource.h x86: trivial header merges 2007-10-17 20:17:08 +02:00
resume-trace_32.h
resume-trace_64.h
resume-trace.h
rio.h
rtc.h x86: trivial header merges 2007-10-17 20:17:08 +02:00
rwlock.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
rwsem.h
scatterlist_32.h Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
scatterlist_64.h Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
scatterlist.h
seccomp_32.h
seccomp_64.h
seccomp.h
sections.h x86: trivial header merges 2007-10-17 20:17:08 +02:00
segment_32.h
segment_64.h
segment.h
semaphore_32.h kill DECLARE_MUTEX_LOCKED 2007-10-17 08:42:47 -07:00
semaphore_64.h kill DECLARE_MUTEX_LOCKED 2007-10-17 08:42:47 -07:00
semaphore.h
sembuf.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
serial.h x86: merge some trivially mergeable headers 2007-10-17 20:17:09 +02:00
setup.h x86: clean up setup.h and the boot code 2007-10-23 22:37:25 +02:00
shmbuf.h x86: merge shmbuf_32/64.h 2007-10-23 22:37:24 +02:00
shmparam.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
sigcontext32.h
sigcontext.h x86: merge sigcontext_32/64.h 2007-10-23 22:37:24 +02:00
siginfo.h x86: unify include/asm/siginfo_32/64.h 2007-10-17 20:26:17 +02:00
signal.h x86: merge signal_32/64.h 2007-10-23 22:37:24 +02:00
smp_32.h Revert "i386: export i386 smp_call_function_mask() to modules" 2007-10-27 20:57:43 +02:00
smp_64.h x86: add safe_smp_processor_id for x86_64 2007-10-23 22:37:23 +02:00
smp.h
socket.h
sockios.h x86: merge some trivially mergeable headers 2007-10-17 20:17:09 +02:00
sparsemem_32.h
sparsemem_64.h
sparsemem.h
spinlock_32.h
spinlock_64.h
spinlock_types.h
spinlock.h
srat.h
stacktrace.h x86: constify stacktrace_ops 2007-10-17 20:16:11 +02:00
stat.h x86: merge stat_32/64.h 2007-10-23 22:37:24 +02:00
statfs.h x86: merge statfs_32/64.h 2007-10-23 22:37:24 +02:00
string_32.h i386: Remove strrchr assembler implementation 2007-10-17 20:16:23 +02:00
string_64.h
string.h
suspend_32.h
suspend_64.h x86: hibernation: document __save_processor_state() on x86 2008-01-30 13:30:04 +01:00
suspend.h
swiotlb.h
sync_bitops.h
system_32.h i386: consolidate show_regs and show_registers for i386 2007-10-19 20:35:03 +02:00
system_64.h x86: also define AT_VECTOR_SIZE_ARCH 2007-12-18 18:05:58 +01:00
system.h
tce.h
termbits.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
termios.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
therm_throt.h
thread_info_32.h remove __attribute_used__ 2008-01-28 23:21:18 +01:00
thread_info_64.h sched: high-res preemption tick 2008-01-25 21:08:29 +01:00
thread_info.h
time.h
timer.h
timex.h x86: unify timex.h variants 2007-10-12 23:04:23 +02:00
tlb.h x86: unify include/asm/tlb_32/64.h 2007-10-17 20:26:18 +02:00
tlbflush_32.h remove unused flush_tlb_pgtables 2007-10-19 11:53:34 -07:00
tlbflush_64.h remove unused flush_tlb_pgtables 2007-10-19 11:53:34 -07:00
tlbflush.h
topology_32.h x86: convert cpuinfo_x86 array to a per_cpu array 2007-10-19 20:35:04 +02:00
topology_64.h Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86 2007-10-19 15:06:00 -07:00
topology.h
tsc.h x86: unify timex.h variants 2007-10-12 23:04:23 +02:00
types.h x86: unify include/asm/types_32/64.h 2007-10-17 20:32:07 +02:00
uaccess_32.h
uaccess_64.h
uaccess.h
ucontext.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
unaligned.h x86: unify some more trivial include/asm-x86/ 32/64 variants 2007-10-17 20:17:10 +02:00
unistd_32.h
unistd_64.h x86: cleanup 64bit unistd.h 2007-10-17 20:16:36 +02:00
unistd.h
unwind.h x86: unify include/asm/unwind_32/64.h 2007-10-17 20:32:38 +02:00
user32.h
user_32.h
user_64.h
user.h
vga.h
vgtod.h
vic.h
vm86.h
vmi_time.h
vmi.h
voyager.h
vsyscall32.h
vsyscall.h i386/x8664: cleanup the shared hpet code 2007-10-12 23:04:23 +02:00
xor_32.h
xor_64.h
xor.h