Re: [Xen-devel] (XEN) APIC error on CPU0: 40(00)

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 04.11.15 at 16:15, <securef33d@xxxxxxxxx> 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.

>  (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?

> 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.

Jan


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