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[PATCH] x86-64/i386: Use common X86_PM_TIMER option and make it EMBEDDED 

This makes x86-64 use the common X86_PM_TIMER Kconfig entry in drivers/acpi

And since PM timer is needed for correct timing on a lot of systems
now (e.g. AMD dual cores) and we often get bug reports from people
who forgot to set it make it depend on CONFIG_EMBEDDED. x86-64 had
this change before and it's a good thing.

I also fixed the description slightly to make this more clear.

Cc: len.brown@intel.com

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2006-02-26 04:18:37 +01:00 committed by Linus Torvalds
parent 6070f9ec6b
commit e78256b8f3
2 changed files with 3 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/x86_64/Kconfig
View File

@ -354,21 +354,6 @@ config HPET_TIMER
as it is off-chip. You can find the HPET spec at
<http://www.intel.com/hardwaredesign/hpetspec.htm>.
config X86_PM_TIMER
bool "PM timer" if EMBEDDED
depends on ACPI
default y
help
Support the ACPI PM timer for time keeping. This is slow,
but is useful on some chipsets without HPET on systems with more
than one CPU. On a single processor or single socket multi core
system it is normally not required.
When the PM timer is active 64bit vsyscalls are disabled
and should not be enabled (/proc/sys/kernel/vsyscall64 should
not be changed).
The kernel selects the PM timer only as a last resort, so it is
useful to enable just in case.
config HPET_EMULATE_RTC
bool "Provide RTC interrupt"
depends on HPET_TIMER && RTC=y

8
drivers/acpi/Kconfig
View File

@ -285,9 +285,8 @@ config ACPI_SYSTEM
dump your ACPI DSDT table using /proc/acpi/dsdt.
config X86_PM_TIMER
bool "Power Management Timer Support"
bool "Power Management Timer Support" if EMBEDDED
depends on X86
depends on !X86_64
default y
help
The Power Management Timer is available on all ACPI-capable,
@ -298,9 +297,8 @@ config X86_PM_TIMER
voltage scaling, unlike the commonly used Time Stamp Counter
(TSC) timing source.
So, if you see messages like 'Losing too many ticks!' in the
kernel logs, and/or you are using this on a notebook which
does not yet have an HPET, you should say "Y" here.
You should nearly always say Y here because many modern
systems require this timer.
config ACPI_CONTAINER
tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"