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Re: HPET enabled in BIOS, not presented as available_clocksource -- config, kernel code, &/or BIOS?

From Clemens Ladisch <clemens@ladisch.de>
Newsgroups linux.kernel
Subject Re: HPET enabled in BIOS, not presented as available_clocksource -- config, kernel code, &/or BIOS?
Date 2017-05-13 22:00 +0200
Message-ID <tGLmN-88a-3@gated-at.bofh.it> (permalink)
References <tGv8l-5SF-1@gated-at.bofh.it> <tGJkZ-6O2-9@gated-at.bofh.it>
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Randy Dunlap wrote:
> On 05/12/17 19:30, PGNet Dev wrote:
>> 	dmesg | grep -i hpet
>> 		[    8.491738] hpet_acpi_add: no address or irqs in _CRS
>
> Above line marks a big failure. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
>> Disassembling the firmware acpi tables
>>
>> 	cat /sys/firmware/acpi/tables/HPET > /var/tmp/hpet.out
>> 	iasl -d /var/tmp/hpet.out

That table is not used by hpet_acpi_add; you have to check for the device
that mentions "PNP0103" in the DSDT table.

But anyway, as far as I can tell from my own machine, the _CRS in the
DSDT table never lists the HPET interrupts, and the HPET registration is
always done by hpet_reserve_platform_timers() in arch/x86/kernel/hpet.c.
Try adding logging to hpet_late_init() to find out why it aborts.


Regards,
Clemens

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HPET enabled in BIOS, not presented as available_clocksource --  config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 04:40 +0200
  Re: HPET enabled in BIOS, not presented as available_clocksource --  config, kernel code, &/or BIOS? Randy Dunlap <rdunlap@infradead.org> - 2017-05-13 19:50 +0200
    Re: HPET enabled in BIOS, not presented as available_clocksource --  config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 20:30 +0200
      Re: HPET enabled in BIOS, not presented as available_clocksource --  config, kernel code, &/or BIOS? Randy Dunlap <rdunlap@infradead.org> - 2017-05-13 21:30 +0200
        Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 21:50 +0200
          Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Andrew Cooper <andrew.cooper3@citrix.com> - 2017-05-13 22:00 +0200
            Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 22:10 +0200
              Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Andrew Cooper <andrew.cooper3@citrix.com> - 2017-05-13 22:20 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 23:10 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Juergen Gross <jgross@suse.com> - 2017-05-14 19:20 +0200
              Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Valentin Vidic <Valentin.Vidic@CARNet.hr> - 2017-05-13 22:30 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 23:10 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Valentin Vidic <Valentin.Vidic@CARNet.hr> - 2017-05-13 23:40 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-14 00:00 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Valentin Vidic <Valentin.Vidic@CARNet.hr> - 2017-05-14 00:20 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-14 01:20 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Andrew Cooper <andrew.cooper3@citrix.com> - 2017-05-14 17:50 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Randy Dunlap <rdunlap@infradead.org> - 2017-05-14 19:50 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2017-05-15 20:10 +0200
                Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-17 02:20 +0200
        Re: [Xen-devel] HPET enabled in BIOS, not presented as  available_clocksource -- config, kernel code, &/or BIOS? Andrew Cooper <andrew.cooper3@citrix.com> - 2017-05-13 22:10 +0200
    Re: HPET enabled in BIOS, not presented as available_clocksource --  config, kernel code, &/or BIOS? PGNet Dev <pgnet.dev@gmail.com> - 2017-05-13 22:00 +0200
    Re: HPET enabled in BIOS, not presented as available_clocksource --  config, kernel code, &/or BIOS? Clemens Ladisch <clemens@ladisch.de> - 2017-05-13 22:00 +0200

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