Looks like the HPET spec at intel.com got moved. It isn't hard to find so drop the link, just mention the revision assumed.
Suggested-by: Thomas Gleixner <t...@linutronix.de> Signed-off-by: Michael S. Tsirkin <m...@redhat.com> --- drivers/char/hpet.c | 2 +- Documentation/timers/hpet.txt | 2 +- arch/x86/Kconfig | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 240b6cf..86c5f4d 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -42,7 +42,7 @@ /* * The High Precision Event Timer driver. * This driver is closely modelled after the rtc.c driver. - * http://www.intel.com/hardwaredesign/hpetspec_1.pdf + * http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/software-developers-hpet-spec-1-0a.pdf */ #define HPET_USER_FREQ (64) #define HPET_DRIFT (500) diff --git a/Documentation/timers/hpet.txt b/Documentation/timers/hpet.txt index 767392f..f24e978 100644 --- a/Documentation/timers/hpet.txt +++ b/Documentation/timers/hpet.txt @@ -3,7 +3,7 @@ The High Precision Event Timer (HPET) hardware follows a specification by Intel and Microsoft which can be found at - http://www.intel.com/hardwaredesign/hpetspec_1.pdf +http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/software-developers-hpet-spec-1-0a.pdf Each HPET has one fixed-rate counter (at 10+ MHz, hence "High Precision") and up to 32 comparators. Normally three or more comparators are provided, diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9af2e63..f32faba 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -778,7 +778,7 @@ config HPET_TIMER The HPET provides a stable time base on SMP systems, unlike the TSC, but it is more expensive to access, as it is off-chip. You can find the HPET spec at - <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>. + <http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/software-developers-hpet-spec-1-0a.pdf>. You can safely choose Y here. However, HPET will only be activated if the platform and the BIOS support this feature. -- MST
