[Xen-devel] Taken fault at bad CS c000...

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

Just saw such warnings like:
...
(XEN) printk: 387824 messages suppressed.
(XEN) seg_fixup.c:282: Taken fault at bad CS c000, IP 00003aab
(XEN) seg_fixup.c:282: Taken fault at bad CS c000, IP 00003ab2
(XEN) seg_fixup.c:282: Taken fault at bad CS c000, IP 00003aab
(XEN) seg_fixup.c:282: Taken fault at bad CS c000, IP 00003ab2
...

It only jumped out when switching to/off X-windows within dom0, 
and seems that guest is in vm86 mode for executing VGABIOS 
code. System is still running good except such warning...

Xen-unstable has no such issue, which just happens on my local 
version with PM patch sets. Though it's very likely to do with my 
local changes, these changes are assumed to have no impact on 
normal system running. So can anybody help a bit about 
possible cause for such warning? Does it mean something wrong 
in emulate_privilege_op before gpf_emulate_4gb?

Thanks,
Kevin

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