Re: (XEN) APIC error on CPU0: 40(00)

[John Doe <securef33d@gmail.com>]

On 04/11/2015 17:13, Jan Beulich wrote:
>>>> On 04.11.15 at 16:15, <securef33d@gmail.com> wrote:
>> Hi,
>> i just build the latest 4.3.0 kernel and ran it on qubes-os with xen
>> 4.4.3. I get this error just before the reboot:
>>
>>  [(XEN) APIC error on CPU0: 40(00)
> 
> And this appeared with the switch to kernel 4.3? No other variable
> (e.g. all config options new in 4.3 turned off)? I ask because the
> APIC is driven by Xen, not the kernel, and hence the kernel should
> have no (direct) influence on APIC behavior.

This started with 4.3.0, with 4.3.0-rc7 the system was booting properly
(except for the xsave=0 workaround, without that i also get a crash dump
right before the APIC error).

> 
>>  (XEN) Resetting with ACPI MEMORY or I/O RESET_REG.
>>
>> I can also see some weird acpi-related messages on the log i attached, like:
>>  (XEN) ACPI: Invalid sleep control/status register data: 0:0x8:0x3 0:0x8:0x3
>> (XEN) ERST table was not found
>>  [    3.608404] ACPI Error: [\_SB_.PCI0.XHC_.RHUB.HS11] Namespace lookup
>> failure, AE_NOT_FOUND (20150818/dswload-210)
>>  [    3.608410] ACPI Exception: AE_NOT_FOUND, During name lookup/catalog
>> (20150818/psobject-227)
>>  [    3.608439] ACPI Exception: AE_NOT_FOUND, (SSDT:xh_rvp08) while
>> loading table (20150818/tbxfload-193)
>>  [    3.619914] ACPI Error: 1 table load failures, 5 successful
>> (20150818/tbxfload-214)
>>  [    3.679113] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
>> [    3.688942] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep
>> State [\_S1_] (20150818/hwxface-580)
>>  [    3.688948] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep
>> State [\_S2_] (20150818/hwxface-580)
>>  [    3.756027] PM-Timer failed consistency check  (0xffffff) - aborting.
>>
>> With older kernels (like 3.12 or 4.2.1) i always see those messages but
>> i'm able to boot without the acpi error.
> 
> I guess those latter messages are unrelated - not the difference
> between ACPI and APIC. Also I'm unsure about you saying "boot"
> here but "reboot" above?

The APIC error prevents me from booting the machine, causing a forced
reboot, the above messages won't. They are present even when the system
starts correctly with older kernels.


> 
>> My machine runs on skylake cpu with z170 chipset and the latest bios.
>> Any ideas on how to fix this?
> 
> Not without first figuring out what bad vector is being received
> by the APIC, which likely will involved quite a bit of debugging
> and code instrumentation.

Do you think that this could be caused by some sort of hardware/firmware
issue?

Thanks,
J.

> 
> Jan
>