This code in arch/x86/kernel/entry_32.S is wrong:
#ifdef CONFIG_PARAVIRT
/*
* The kernel can't run on a non-flat stack if paravirt mode
* is active. Rather than try to fixup the high bits of
* ESP, bypass this code entirely. This may break DOSemu
* and/or Wine support in a paravirt VM, although the option
* is still available to implement the setting of the high
* 16-bits in the INTERRUPT_RETURN paravirt-op.
*/
cmpl $0, pv_info+PARAVIRT_enabled
jne restore_nocheck
#endif
On KVM guests, it notices that paravirt is enabled and bails. It
should work fine on KVM -- the condition it should be checking is
whether we have native segmentation.
Do you know the right way to ask that?
Thanks,
Andy
--
Andy Lutomirski
AMA Capital Management, LLC
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