From: Clemens Ladisch <clemens@ladisch.de>
To: pgnet.dev@gmail.com
Cc: Randy Dunlap <rdunlap@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: HPET enabled in BIOS, not presented as available_clocksource -- config, kernel code, &/or BIOS?
Date: Sat, 13 May 2017 21:45:12 +0200 [thread overview]
Message-ID: <c7b93327-e866-957c-a564-a92829d54197@ladisch.de> (raw)
In-Reply-To: <9ff8ca5a-727d-13c3-7c39-6383e00d2edf@infradead.org>
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
next prev parent reply other threads:[~2017-05-13 19:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-13 2:30 PGNet Dev
2017-05-13 17:41 ` Randy Dunlap
2017-05-13 18:26 ` PGNet Dev
2017-05-13 19:28 ` Randy Dunlap
2017-05-13 19:38 ` [Xen-devel] " Andrew Cooper
2017-05-13 19:49 ` PGNet Dev
2017-05-13 19:59 ` Andrew Cooper
2017-05-13 20:05 ` PGNet Dev
2017-05-13 20:16 ` Andrew Cooper
2017-05-13 21:07 ` PGNet Dev
2017-05-14 17:13 ` Juergen Gross
2017-05-13 20:28 ` Valentin Vidic
2017-05-13 21:06 ` PGNet Dev
2017-05-13 21:32 ` Valentin Vidic
2017-05-13 21:58 ` PGNet Dev
2017-05-13 22:15 ` Valentin Vidic
2017-05-13 23:17 ` PGNet Dev
2017-05-14 15:39 ` Andrew Cooper
2017-05-14 17:41 ` Randy Dunlap
2017-05-15 18:06 ` Austin S. Hemmelgarn
2017-05-17 0:12 ` PGNet Dev
2017-05-17 0:15 ` PGNet Dev
2017-05-13 19:45 ` Clemens Ladisch [this message]
2017-05-13 19:52 ` PGNet Dev
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