Re: [Xen-devel] PTE Write access is not set

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2011-12-14 at 08:05 +0000, Liwei wrote:
> Hello list,
>     Using the 3.1.5 kernel and 4.1.3-rc1-pre xen (Latest ChangeSet:
> Tue Dec 06 10:53:12 2011 +0000 23199:d9f8316a8291), these crashes
> occur after about a day or so of running a HVM:
> =================8<=================
> (XEN) realmode.c:115:d9 Failed to emulate insn.
> (XEN) realmode.c:165:d9 Real-mode emulation failed @ e40a:00005f6c: d9
> 33 01 fc 30 34

I think this is FNSTENV/FSTENV which doesn't seem to be emulated by
Xen :-( xen/arch/x86/x86_emulate/x86_emulate.c has:
                 /* case 6: fstenv - TODO */

Ian.

> (XEN) domain_crash called from realmode.c:166
> (XEN) Domain 9 (vcpu#0) crashed on cpu#6:
> (XEN) ----[ Xen-4.1.3-rc1-pre  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    6
> (XEN) RIP:    e40a:[<0000000000005f6c>]
> (XEN) RFLAGS: 0000000000010002   CONTEXT: hvm guest
> (XEN) rax: 000000000000e7e5   rbx: 0000000000000000   rcx: 00000000000d0000
> (XEN) rdx: 00000000000001f7   rsi: 0000000000000000   rdi: 0000000000000dba
> (XEN) rbp: 0000000000000182   rsp: 0000000000000db0   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 0000000000000010   cr4: 0000000000000000
> (XEN) cr3: 0000000000000000   cr2: 0000000000000000
> (XEN) ds: 9fc0   es: 9e00   fs: 0000   gs: 0000   ss: 9e00   cs: e40a
> =================8<=================
> (XEN) realmode.c:115:d5 Failed to emulate insn.
> (XEN) realmode.c:165:d5 Real-mode emulation failed @ c5d5:000242bc: d9
> 33 01 fc 30 34
> (XEN) domain_crash called from realmode.c:166
> (XEN) Domain 5 (vcpu#0) crashed on cpu#0:
> (XEN) ----[ Xen-4.1.3-rc1-pre  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    0
> (XEN) RIP:    c5d5:[<00000000000242bc>]
> (XEN) RFLAGS: 0000000000010013   CONTEXT: hvm guest
> (XEN) rax: 000000000000001b   rbx: 0000000000000702   rcx: 0000000000010ba7
> (XEN) rdx: 0000000000008fd5   rsi: 0000000000001333   rdi: 000000000000900e
> (XEN) rbp: 000000000000703e   rsp: 000000000000c5cf   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 0000000000000010   cr4: 0000000000000000
> (XEN) cr3: 0000000000000000   cr2: 0000000000000000
> (XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: c5d5
> (XEN) [VT-D]iommu.c:856: iommu_fault_status: Primary Pending Fault
> (XEN) [VT-D]iommu.c:831: DMAR:[DMA Write] Request device [0d:00.1]
> fault addr d8964f44000, iommu reg = ffff82c3fff57000
> (XEN) DMAR:[fault reason 05h] PTE Write access is not set
> (XEN) print_vtd_entries: iommu = ffff83045ce565c0 bdf = d:0.1 gmfn = d8964f44
> (XEN)     root_entry = ffff8304519d1000
> (XEN)     root_entry[d] = 4127af001
> (XEN)     context = ffff8304127af000
> (XEN)     context[1] = 2_414aca001
> (XEN)     l4 = ffff830414aca000
> (XEN)     l4_index = 1b
> (XEN)     l4[1b] = 0
> (XEN)     l4[1b] not present
> =================8<=================
> 
>     If I try to restart the crashed VM, the same crash always occurs
> again during POST (the last thing I see on the VNC console is the BIOS
> boot, before the connection terminates). A dom0 reboot is necessary to
> get things to work again.
>     0d:00.1 is part of an Intel 82575GB quad port network adapter. The
> adapter contains three ports, 0d:00.0, 0d:00.1, 0e:00.0, 0e:00.1. Each
> of them is assigned to a VM. So far the crashes have occurred to VMs
> using 0d:00.1, 0e:00.0 and 0e:00.1. (Pretty sure a crash involving
> 0d:00.0 will come soon).
>     Is this a potential bug, or (more likely?) problematic hardware?
> 
> The relevant PCI subtree looks like this:
> =================8<=================
>  \-[0000:00]-+-00.0
>              +-03.0-[01]--+-00.0
>              |            \-00.1
>              +-05.0-[02-0e]----00.0-[03-0e]--+-00.0-[04]----00.0
> 
> +-02.0-[05-0a]----00.0-[06-0a]--+-02.0-[07]----00.0
>                                              |
>       +-03.0-[08]----00.0
>                                              |
>       +-04.0-[09]----00.0
>                                              |
>       \-05.0-[0a]----00.0
> 
> \-03.0-[0b-0e]----00.0-[0c-0e]--+-02.0-[0d]--+-00.0
> 
>       |            \-00.1
> 
>       \-04.0-[0e]--+-00.0
> 
>                    \-00.1
> =================8<=================
> 
> Thanks!
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel