Hi. FYI.
I've been working on this panic, however it seems a difficult bug.
I resorted hg bisect which told me the following change set.
changeset: 18084:0b72d16e794b
summary: [IA64] kexec: Unpin the correct VHPT TR in ia64_do_tlb_purge
I had expected that the EFI mapping patch caused the panic,
but now I'm beginning to suspect that the panic is a long hidden
bug and the patch just shook out it. (Please NOTE I'm not sure...)
I haven't reproduce the panic with c/s 18083 though...
On Fri, Jul 25, 2008 at 04:37:25PM +0900, KUWAMURA Shin'ya wrote:
> Hi,
>
> On cset:18134, creating DomVTi with PV-on-HVM drivers causes the
> hypervisor panic on both hp rx2620 and Tiger4.
> I attached the panic message on hp rx2620.
>
> (XEN) ia64_fault, vector=0x18, ifa=0xf0000040fb8a0010, iip=0xf4000000040638e0,
> ipsr=0x0000101008226038, isr=0x0000008000000030
> (XEN) General Exception: IA-64 Reserved Register/Field fault (data access).
> (XEN) d 0xf000000004118080 domid 6
> (XEN) vcpu 0xf0000002bd318000 vcpu 1
> (XEN)
> (XEN) CPU 0
> (XEN) psr : 0000101008226038 ifs : 8000000000000710 ip : [<f4000000040638e0>]
> (XEN) ip is at flush_vtlb_for_context_switch+0x20/0x370
>
> Instructions:
> f4000000040638e0: 08 00 01 40 18 10 [MMI] ld8 r32=[r32]
> f4000000040638e6: 20 01 38 20 20 00 ld4 r18=[r14]
> f4000000040638ec: f2 07 fc 93 mov r16=32767
>
> TEST ENVIRONMENT #1
> Machine : Tiger4
> Changeset : 18134:1970781956c7 (ia64/xen-unstable)
> 609:8a3dc4fdb478 (ia64/linux-2.6.18-xen)
> 126:d255b2cfdd5a (efi-vfirmware)
> Dom0 OS : RHEL4 U2 (2P)
> DomVTi OS : RHEL4 U2 (8P, with PV-on-HVM drivers)
> CONFIG_QEMU : ioemu
>
> TEST ENVIRONMENT #2
> Machine : hp rx2620
> Changeset : 18134:1970781956c7 (ia64/xen-unstable)
> 609:8a3dc4fdb478 (ia64/linux-2.6.18-xen)
> 126:d255b2cfdd5a (efi-vfirmware)
> Dom0 OS : RHEL5.2 (2P)
> DomVTi OS : RHEL5.2 (2P, with PV-on-HVM drivers)
> CONFIG_QEMU : ioemu
>
> Best regards,
> (XEN) ia64_fault, vector=0x18, ifa=0xf0000040fb8a0010,
> iip=0xf4000000040638e0, ipsr=0x0000101008226038, isr=0x0000008000000030
> (XEN) General Exception: IA-64 Reserved Register/Field fault (data access).
> (XEN) d 0xf000000004118080 domid 6
> (XEN) vcpu 0xf0000002bd318000 vcpu 1
> (XEN)
> (XEN) CPU 0
> (XEN) psr : 0000101008226038 ifs : 8000000000000710 ip : [<f4000000040638e0>]
> (XEN) ip is at flush_vtlb_for_context_switch+0x20/0x370
> (XEN) unat: 0000000000000000 pfs : 0000000000000006 rsc : 0000000000000003
> (XEN) rnat: 0000000000000000 bsps: 0000000000000000 pr : 0000000000008153
> (XEN) ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f
> (XEN) csd : 0000000000000000 ssd : 0000000000000000
> (XEN) b0 : f4000000040a9570 b6 : a0000002005461e0 b7 : 0000000000000000
> (XEN) f6 : 000000000000000000000 f7 : 000000000000000000000
> (XEN) f8 : 000000000000000000000 f9 : 000000000000000000000
> (XEN) f10 : 000000000000000000000 f11 : 000000000000000000000
> (XEN) r1 : a0000002005607a8 r2 : 0000000000000020 r3 : 0000000000000000
> (XEN) r8 : 0000000000000000 r9 : 000000007e817c90 r10 : 0000000000000000
> (XEN) r11 : 2000000000000000 r12 : e00000007e817c40 r13 : e00000007e810000
> (XEN) r14 : 0000000000000000 r15 : f0000002bd319081 r16 : 0000000000000000
> (XEN) r17 : 0000000000000000 r18 : 0000000000000000 r19 : 0000000000000000
> (XEN) r20 : 0000000000000000 r21 : 0000000000000000 r22 : 0000000000000000
> (XEN) r23 : 0000000000000000 r24 : 0000000000000000 r25 : 0000000000000000
> (XEN) r26 : 0000000000000000 r27 : 0000000000000000 r28 : 0000000000000000
> (XEN) r29 : 0000000000000000 r30 : 0000000000000000 r31 : 0000000000000000
> (XEN)
> (XEN) Call Trace:
> (XEN) [<f4000000040cf2e0>] show_stack+0x80/0xa0
> (XEN) sp=f0000002bd319680 bsp=f0000002bd319660
> (XEN) [<f40000000408d790>] ia64_fault+0x790/0xad0
> (XEN) sp=f0000002bd319850 bsp=f0000002bd319628
> (XEN) [<f4000000040c7480>] ia64_leave_kernel+0x0/0x300
> (XEN) sp=f0000002bd319850 bsp=f0000002bd319628
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) Fault in Xen.
> (XEN) ****************************************
> (XEN)
> (XEN) Reboot in five seconds...
> _______________________________________________
> Xen-ia64-devel mailing list
> Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-ia64-devel
--
yamahata
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