Gerd Hoffmann wrote:
> Jeremy Fitzhardinge wrote:
>> Gerd Hoffmann wrote:
>>> Jeremy Fitzhardinge wrote:
>>>
>>>> Yes, I think the legacy interrupts are not being set up completely, but
>>>> I'm not quite sure how they should be set up. Will look into it.
>>>>
>>> FYI: Recently my dated, apic-less i386 laptop started to successfully
>>> boot the pv_ops/dom0 kernel, all the way up to userspace.
>>>
>> Do you get a vga console? Can you start domains?
>
> gfx console works (i.e. kernel /xen-3.3.gz vga=gfx-1024x768x16).
> vga text console didn't last time I tried.
Update: latest kernel (rc7 based) crashes. rc6 from somewhen last week
is the working one. rc7 messages:
unhandled page fault (ec=0003)
page table walk from c1c55000
l1[0x055] = 9c55061 1c55
-> rw access to r/o page?
EIP c140f4c3
c140f2d2 <alloc_bootmem_core>:
[ ... ]
c140f4c3: f3 ab rep stos %eax,%es:(%edi)
-> memset(page,0,PAGE_SIZE) ?
Dom0 domain builder says page tables are at c1c55000 -> c1c6a000
/me guesses the initial page tables are released to the page allocator,
but still they are mapped r/o => boom as soon as one happens to get
allocated. Which probably happens very soon on memory-constrained
machines like mine, while other might stay up longer and show strange
bugs later on ;)
BTW: The trick to see the messages on the laptop screen is:
kernel /xen-3.3.gz vga=text-80x50,keep
module /vmlinuz-2.6.29-rc7-tip-kraxel ro root=/dev/zen/rawhide \
console=hvc0
>> x86-32 booting to usermode dom0, but only with serial console and domain
>> creation fails (SIGBUS in the domain builder, so I'm hoping its related
>> to the hvm qemu crash).
>
> Didn't try yet, the machine is heavily underpowered for serious
> virtualization work, it has 192 MB RAM only. And hvm doesn't work
> anyway because the box is way to old for that (Pentium III).
Doesn't work. I get messages about failed multicalls with
remap_page_range and privcmd_ioctl in the stack trace. Most likely
mapping the guest pages in the domain builder doesn't work. No surprise
this leads to SIGBUS.
HTH,
Gerd
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