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xen-devel
RE: [Xen-devel] MSI causing softpanics in guest
Seems it is not possible to trigger this bug_on, although I do not quite
understand this part of code.
I think you have invoked pci_enable_msi before request_irq, right? Does
pci_enable_msi return correctly?
Shan Haitao
-----Original Message-----
From: Anish Bhatt [mailto:anish@xxxxxxxxxx]
Sent: 2008年9月22日 2:47
To: Shan, Haitao
Cc: Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx; Jan Beulich
Subject: Re: [Xen-devel] MSI causing softpanics in guest
I'm using MSI. I'm using the same 2.6.18 kernel for xen & PV, changeset
is as follows :
(XEN) Latest ChangeSet: Wed Sep 17 14:16:02 2008 +0100 18510:694b7daa353c
-Anish
Shan, Haitao wrote:
> Are you using MSI or MSI-X?
> I remember there are some bugfixes related to MSI-X recently. What are the
> changsets you are using for xen and PV kernel?
>
> Shan Haitao
>
> -----Original Message-----
> From: Anish Bhatt [mailto:anish@xxxxxxxxxx]
> Sent: 2008年9月21日 1:16
> To: Keir Fraser
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Shan, Haitao; Jan Beulich
> Subject: Re: [Xen-devel] MSI causing softpanics in guest
>
> I have put msi=1 in grub in 3.3 & unstable, don't know why its still not
> working though..
> -anish
>
> Keir Fraser wrote:
>> On 3.3.0 you need to specify msi=1 on Xen's command line to enable MSI. In
>> xen-unstable, MSI support is always enabled.
>>
>> I changed a check in evtchn_get_xen_pirq() into a BUG_ON() as it looks to me
>> like it should never trigger. Jan Beulich was the original authour of that
>> function -- cc'ed in case he can indicate whether I've actually broken the
>> function. :-)
>>
>> -- Keir
>>
>> On 19/9/08 20:53, "Anish Bhatt" <anish@xxxxxxxxxxxxx> wrote:
>>
>>
>>> lspci shows MSI enabled for PCI device. PCI passthrough works fine.
>>> However, as soon as the MSI driver for card is insmodded, kernel panics.
>>> This is on xen-unstable. Tried the same with xen-3.3.0 which is
>>> supposed to have MSI passthrough, but the same guest shows MSI as disabled.
>>> Any else seen this bug, or know of a workaround ?
>>>
>>> Trace is as follows :
>>>
>>> ------------[ cut here ]------------
>>> kernel BUG at
>>>
>>>
>> /usr/src/xen/xen-unstable.hg/linux-2.6.18-xen.hg/drivers/xen/core/evtchn.c:809>
>> !
>>
>>> invalid opcode: 0000 [#1]
>>> SMP
>>> Modules linked in: nfemsg nfdvnet ipv6 binfmt_misc dm_mod nfe usbcore
>>> ext3 jbd processor fuse
>>> CPU: 0
>>> EIP: 0061:[<c02487f5>] Tainted: GF VLI
>>> EFLAGS: 00210097 (2.6.18.8-xen #2)
>>> EIP is at evtchn_get_xen_pirq+0x35/0x40
>>> eax: ffffffff ebx: 00000002 ecx: c0372e60 edx: 00000000
>>> esi: c2103560 edi: c03d3080 ebp: 000004f9 esp: ed385dac
>>> ds: 007b es: 007b ss: 0069
>>> Process modprobe (pid: 2590, ti=ed384000 task=ed7b1100 task.ti=ed384000)
>>> Stack: c0248aef 00000000 00000000 00000000 00000000 00000000 00000000
>>> 00000000
>>> 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>> 00000000
>>> 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>> 00000000
>>> Call Trace:
>>> [<c0248aef>] startup_pirq+0x3f/0x250
>>> [<c0150b50>] setup_irq+0x160/0x1b0
>>> [<ee0dd270>] nfe_interrupt_handler+0x0/0x30 [nfemsg]
>>> [<c0150c43>] request_irq+0xa3/0xc0
>>> [<ee02c8ad>] nfemsg_module_init+0x8ad/0x133e [nfemsg]
>>> [<c030531b>] cond_resched+0x2b/0x40
>>> [<c0305369>] wait_for_completion+0x19/0xf0
>>> [<c0142818>] sys_init_module+0x148/0x1b50
>>> [<c010595f>] syscall_call+0x7/0xb
>>> Code: 00 00 89 d1 d3 e0 85 05 c4 2c 42 c0 74 1a 8b 14 95 c0 c0 44 c0 89
>>> d0 c1 e8 1c 83 e8 01 75 0c c1 ea 0c 81 e2 ff ff 00 00 89 d0 c3 <0f> 0b
>>> 29 03 a4 f1 32 c0 eb ea 90 83 ec 08 89 74 24 04 89 c6 a1
>>> EIP: [<c02487f5>] evtchn_get_xen_pirq+0x35/0x40 SS:ESP 0069:ed385dac
>>> ### card [0] start: host progs ###
>>> -bash-3.2#
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: ------------[ cut here ]------------
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: kernel BUG at
>>>
>>>
>> /usr/src/xen/xen-unstable.hg/linux-2.6.18-xen.hg/drivers/xen/core/evtchn.c:809>
>> !
>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: invalid opcode: 0000 [#1]
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: SMP
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: CPU: 0
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: EIP is at evtchn_get_xen_pirq+0x35/0x40
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: eax: ffffffff ebx: 00000002 ecx: c0372e60 edx: 00000000
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: esi: c2103560 edi: c03d3080 ebp: 000004f9 esp: ed385dac
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: ds: 007b es: 007b ss: 0069
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: Process modprobe (pid: 2590, ti=ed384000 task=ed7b1100
>>> task.ti=ed384000)
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: Stack: c0248aef 00000000 00000000 00000000 00000000 00000000
>>> 00000000 00000000
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: 00000000 00000000 00000000 00000000 00000000 00000000
>>> 00000000 00000000
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: 00000000 00000000 00000000 00000000 00000000 00000000
>>> 00000000 00000000
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: Call Trace:
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: Code: 00 00 89 d1 d3 e0 85 05 c4 2c 42 c0 74 1a 8b 14 95 c0 c0
>>> 44 c0 89 d0 c1 e8 1c 83 e8 01 75 0c c1 ea 0c 81 e2 ff ff 00 00 89 d0 c3
>>> <0f> 0b 29 03 a4 f1 32 c0 eb ea 90 83 ec 08 89 74 24 04 89 c6 a1
>>>
>>> Message from syslogd@drake at Sep 19 15:36:44 ...
>>> kernel: EIP: [<c02487f5>] evtchn_get_xen_pirq+0x35/0x40 SS:ESP
>>> 0069:ed385dac
>>>
>>
>>
>
>
> --
> As long as the music's loud enough, we won't hear the world falling apart.
>
--
As long as the music's loud enough, we won't hear the world falling apart.
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