Re: [Xen-devel] [BUG] xen-mceinj tool testing cause dom0 crash

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.05.17 at 10:39, <xudong.hao@xxxxxxxxx> wrote:
> (XEN) Hardware Dom0 crashed: rebooting machine in 5 seconds.

Not this - Xen is unavoidably going to go down in such a case, yet
your log has no hint at all what kind of problem Dom0 experienced
(e.g. whether one of the injected #MC-s caused this).

> (XEN) ----[ Xen-4.9-rc  x86_64  debug=y   Tainted: MCE  ]----
> (XEN) CPU:    0
> (XEN) RIP:    e008:[<0000000065eb1e13>] 0000000065eb1e13
> ...
> (XEN) Pagetable walk from 00000000682ab009:
> (XEN)  L4[0x000] = 000000102c961063 ffffffffffffffff
> (XEN)  L3[0x001] = 000000005f812063 ffffffffffffffff
> (XEN)  L2[0x141] = 0000000000000000 ffffffffffffffff

Here you're apparently hitting a firmware bug: While RIP
points into runtime services memory, CR2 doesn't:

(XEN)  0000065eb8000-00000682acfff type=0 attr=000000000000000f

You may try working around this via one of "reboot=acpi" or
"efi=no-rs" on the hypervisor command line.

Jan


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