Re: [Xen-devel] domU can't start, Non-priv warnings

[Andrew Theurer <habanero@xxxxxxxxxx>]

Ian Pratt wrote:

> Do you not get a couple of lines from Xen imediately preceeding the
> crash? Might be worth a debug=y build.

I'll make sure debug=y is on.  I also noticed I did not limit this 
system to 3g (it has 4g). I recall this being a problem recently.  I'll 
limit my memory and try again.
the xen output:

(XEN) (file=traps.c, line=880) Non-priv domain attempted 
RDMSR(00000000c0000080.
(XEN) DOM2: (file=mm.c, line=461) Non-privileged attempt to map I/O 
space 000000
(XEN) Domain 2 (vcpu#0) crashed on cpu#3:
(XEN) CPU:    3

BTW, has anyone tried compiling xenU x86_64 kernels with debug on?  I 
error out on, hmm, can't recall the file right now, maybe entry.S.  More 
info on that shortly.
-Andrew

> Ian
>
> > > Please could you lookup the symbols for the eip and maybe the first
> > > couple of text addresses on the stack.
> > I reproduced with a recent pull:
> >
> > Latest ChangeSet: Wed Aug 17 13:22:18 2005
> > fbdbe4fc218de40d5176e0104908e05fb6e2c6ce
> >
> > Looks like we are stuck in xen_l1_entry_update():
> >
> > void xen_l1_entry_update(pte_t *ptr, pte_t val) {
> > mmu_update_t u;
> > u.ptr = virt_to_machine(ptr);
> > u.val = pte_val_ma(val);
> > BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0); }
> >
> > ...assuming we are hitting the BUG
> >
> > stack trace:
> >
> > xen_l1_entry_update
> > __set_fixmap
> > acpi_find_rsdp
> > acpi_table_init
> > acpi_boot_table_init
> > setup_arch
> > level3_kernel_pgt
> > init_task
> > start_kernel
> >
> > (XEN) Domain 3 (vcpu#0) crashed on cpu#3:
> > (XEN) CPU: 3
> > (XEN) EIP: e033:[<ffffffff8011ee91>] ???
> > (XEN) EFLAGS: 0000000000000282
> > (XEN) rax: 00000000ffffffea rbx: ffffffffff578000 rcx:
> > ffffffff8011ee8d r0
> > (XEN) rsi: 0000000000000001 rdi: ffffffff80599e90 rbp:
> > 8000000000000067 r8
> > (XEN) r8: 0000000000000100 r9: 0000000000020000 r10:
> > 0000000000007ff0 r6
> > (XEN) r12: ffff880001703fd0 r13: ffff880001704bc0 r14:
> > 8000000000000067 r0
> > (XEN) Guest stack trace from rsp=ffffffff80599e58:
> > (XEN) ffffffff8011ee8d 0000000000000206 ffffffff8011ee91
> > 000000010000e030 00
> > (XEN) 8000000000000067 00000000001eb000 ffffffff8011c9aa
> > 0000000000000000 00
> > (XEN) ffffffff805c226e 0000000000000e00 ffffffff805cab75
> > 0000000000001000 00
> > (XEN) ffffffff805c22a3 0000000000000e00 ffffffff805c1115
> > 00000000d7c93830 ff
> > (XEN) ffffffff80103000 ffffffff0000000f 0000000007020800
> > ffffffff8047cc00 ff
> > (XEN) ffffffff805ba558 ffffffff80537740 ffffffff805ba193
> > 80108e0000100038 00
> > (XEN) 0000000000000000 0000000000000000 0000000000000000
> > 0000000000000000 00

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